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WO1999035278A1 - Biosynthesis of medium chain length polyhydroxyalkanoates - Google Patents

Biosynthesis of medium chain length polyhydroxyalkanoates Download PDF

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Publication number
WO1999035278A1
WO1999035278A1 PCT/US1998/000083 US9800083W WO9935278A1 WO 1999035278 A1 WO1999035278 A1 WO 1999035278A1 US 9800083 W US9800083 W US 9800083W WO 9935278 A1 WO9935278 A1 WO 9935278A1
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seq
nucleic acid
acid sequence
leu
ala
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PCT/US1998/000083
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French (fr)
Inventor
Yves Poirier
Volker Mittendorf
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Monsanto Co
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Monsanto Co
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Priority to EP98902393A priority Critical patent/EP1044278A1/en
Priority to PCT/US1998/000083 priority patent/WO1999035278A1/en
Priority to AU59071/98A priority patent/AU5907198A/en
Publication of WO1999035278A1 publication Critical patent/WO1999035278A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/63Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79Vectors or expression systems specially adapted for eukaryotic hosts
    • C12N15/82Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
    • C12N15/8241Phenotypically and genetically modified plants via recombinant DNA technology
    • C12N15/8242Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits
    • C12N15/8243Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine, caffeine
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/11DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/62DNA sequences coding for fusion proteins
    • C12N15/625DNA sequences coding for fusion proteins containing a sequence coding for a signal sequence
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/63Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79Vectors or expression systems specially adapted for eukaryotic hosts
    • C12N15/82Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
    • C12N15/8216Methods for controlling, regulating or enhancing expression of transgenes in plant cells
    • C12N15/8221Transit peptides
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/10Transferases (2.)
    • C12N9/1025Acyltransferases (2.3)
    • C12N9/1029Acyltransferases (2.3) transferring groups other than amino-acyl groups (2.3.1)
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P7/00Preparation of oxygen-containing organic compounds
    • C12P7/62Carboxylic acid esters
    • C12P7/625Polyesters of hydroxy carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K2319/00Fusion polypeptide
    • C07K2319/01Fusion polypeptide containing a localisation/targetting motif
    • C07K2319/06Fusion polypeptide containing a localisation/targetting motif containing a lysosomal/endosomal localisation signal

Definitions

  • the invention relates to the biosynthesis of polymers and more specifically to the biosynthesis of polyhydroxyalkanoate polymers in plants.
  • a transgenic plant producing peroxisome- or glyoxysome-targeted polyhydroxyalkanoate synthase resulting in the production of polyhydroxyalkanoate materials.
  • PHAs are bacterial polyesters that accumulate in a wide variety of bacteria. These polymers have properties ranging from stiff and brittle plastics to rubber-like materials, and are biodegradable. Because of these properties, PHAs are an attractive source of nonpolluting plastics and elastomers.
  • BiopolTM a random copolymer of 3 -hydroxy butyrate (3HB) and 3 -hydroxy vai erate (3HV).
  • This bioplastic is used to produce biodegradable molded material (e.g., bottles), films, coatings, and in drug release applications.
  • BiopolTM is produced via a fermentation process employing the bacterium Alcaligenes eutrophus (Byrom, Trends Biotechnol. 5: 246 (1987)).
  • the current market price is $6-7/lb, and the annual production is 1,000 tons. By best estimates, this price can be reduced only about 2-fold via fermentation (Poirier et al., Bio/Technology 13:
  • Polyhydroxyalkanoate is a family of polymers composed primarily of R-3- hydroxyalkanoic acids (Anderson, A. J. & Dawes, E. A. Microbiol Rev. 54: 450-472. (1990); Steinb ⁇ chel, A. in Novel Biomaterials from Biological Sources, ed. Byrom, D. (MacMillan, New York), pp. 123-213. (1991); Poirier, Y. Nawrath, C. & Somerville, C. Bio/Technology 13: 143-150 (1995)).
  • Polyhydroxybutyrate is the most well characterized PHA.
  • PHB high molecular weight PHB is found as intracellular inclusions in a wide variety of bacteria (Steinb ⁇ chel, A. in Novel Biomaterials from Biological Sources, ed. Byrom, D. (MacMillan, New York), pp. 123-213. (1991)).
  • PHB typically accumulates to 80% dry weight with inclusions being typically 0.2-1 ⁇ m in diameter.
  • Small quantity of PHB oligomers of approximately 150 monomer units are also found associated with membranes of bacteria and eukaryotes, where they form channels permeable to calcium (Reusch, R. N., Can. J. Microbiol. 41 (Suppl. 1): 50-54 (1995)).
  • PHAs have the properties of thermoplastics and elastomers. Numerous bacteria and fungi can hydrolyze PHAs to monomers and oligomers, which are metabolized as a carbon source. PHAs have, thus, attracted attention as a potential source of renewable and biodegradable plastics and elastomers.
  • PHB is a highly crystalline polymer with rather poor physical properties, being relatively stiff and brittle (de Koning, G., Can. J. Microbiol. 41 (Suppl. 1): 303-309 (1995)).
  • PHA copolymers containing monomer units ranging from 3 to 5 carbons for short-chain-length PHA (SCL-PHA), or 6 to 14 carbons for medium-chain-length PHA (MCL-PHA), are less crystalline and more flexible polymers (de Koning, G., Can. J. Microbiol. 41 (Suppl. 1): 303-309 (1995)).
  • PHB has been produced in the plant Arabidopsis thaliana expressing the A. eutrophus PHB biosynthetic enzymes (Poirier, Y., et al., Science 256: 520-523 (1992);
  • PHB was also shown to be synthesized in insect cells expressing a mutant fatty acid synthase (Williams, M. D., et al., Appl. Environ. Microbiol. 62: 2540-2546 (1996)), and in yeast expressing the A. eutrophus PHB synthase (Leaf, T. A., et al. Microbiol. 142: 1169-1180 (1996)).
  • a number of pseudomonads including Pseudomonas putida and Pseudomonas aeruginosa, accumulate MCL-PHAs when cells are grown on alkanoic acids (Anderson, A. J. & Dawes, E. A. Microbiol. Rev. 54: 450-472. (1990); Steinb ⁇ chel, A. in Novel Biomaterials from Biological Sources, ed. Byrom, D. (MacMillan, New York), pp. 123-213. (1991); Poirier, Y. Nawrath, C. & Somerville, C. Bio/Technology 13: 143-150 (1995)).
  • the nature of the PHA produced is related to the substrate used for growth and is typically composed of monomers which are 2n carbons shorter than the substrate.
  • MCL-PHAs are synthesized by the PHA synthase from 3-hydroxyacyl-CoA intermediates generated by the ⁇ -oxidation of alkanoic acids (Huijberts, G. N. M., et al. Appl Environ. Microbiol. 58: 536-544 (1992); Huijberts, G. N. M., et al., J. Bacterial 176: 1661-1666 (1994)).
  • this patent application discloses the materials and methods for the use of a peroxisome targeted polyhydroxyalkanoate synthase protein in the biosynthesis of polyhydroxyalkanoate polymers. Localization in the peroxisomes allow for the utilization of intermediates from the lipid ⁇ -oxidation pathway. Plants expressing a P. aeruginosa polyhydroxyalkanoate synthase modified for peroxisome targeting produce PHA containing saturated and unsaturated 3-hydroxyalkanoic acids ranging from 6 to 16 carbons. Polyhydroxyalkanoate granules are found within the glyoxysomes or leaf-type peroxisomes of dark-and light-grown plants, respectively, as well as in the vacuoles.
  • the invention is directed towards materials and methods for the biosynthesis of polyhydroxyalkanoate polymers. More particularly, a fusion protein comprising a polyhydroxyalkanoate synthase protein subunit and a peroxisome targeting protein subunit renders a host cell or plant capable of producing polyhydroxyalkanoate polymer materials.
  • the invention provides a non-naturally ocurring fusion protein comprising a peroxisome targeting protein subunit and a polyhydroxyalkanoate synthase protein subunit.
  • the peroxisome targeting protein subunit and the polyhydroxyalkanoate synthase protein subunit may be any subunit suitable for participation in the invention.
  • the peroxisome targeting subunit may be an N-terminal or C-terminal subunit.
  • the N-terminal subunit is preferably PTS2.
  • the C-terminal peroxisome targeting subunit preferably comprises a tripeptide.
  • the first amino acid in the N-terminus to C- terminus direction is preferably S, A, or P.
  • the second amino acid in the N-terminus to C- terminus direction is preferably K, R, S, or H.
  • the third amino acid in the N-terminus to C- terminus direction is L, M, I, or F.
  • the C-terminal peroxisome targeting subunit comprises ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
  • the peroxisome targeting subunit is preferably at least 70% identical to SEQ ID NO: 14, more preferably at least 80% identical to SEQ ID NO: 14, even more preferably at least 90% identical to SEQ ID NO: 14, and most preferably is SEQ ID NO: 14.
  • the polyhydroxyalkanoate synthase protein subunit is preferably a Pseudomonas subunit, and more preferably a Pseudomonas aeruginosa subunit.
  • the polyhydroxyalkanoate synthase protein subunit may preferably be either a PHAC1 or PHAC2 subunit.
  • the PHAC1 subunit is preferably at least 70% identical to SEQ ID NO:2, more preferably at least 80% identical to SEQ ID NO:2, even more preferably at least 90% identical to SEQ ID NO:2, and most preferably is SEQ ID NO:2.
  • the PHAC2 subunit is preferably at least 70% identical to SEQ ID NO:4, more preferably at least 80% identical to SEQ ID NO:4, even more preferably at least 90% identical to SEQ ID NO:4, and most preferably is SEQ ID NO:4.
  • the fusion protein is preferably at least 70% identical to SEQ ID NO: 18 or SEQ ID NO:20, more preferably at least 80% identical to SEQ ID NO: 18 or SEQ ID NO:20, even more preferably at least 90% identical to SEQ ID NO: 18 or SEQ ID NO:20, and most preferably is SEQ ID NO: 18 or SEQ ID NO:20.
  • the invention encompasses a nucleic acid segment encoding a non-naturally occurring fusion protein.
  • the nucleic acid segment preferably comprises a nucleic acid sequence encoding a peroxisome targeting protein subunit, and a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit.
  • the nucleic acid sequence encoding a peroxisome targeting protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO: 13.
  • the length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO: 13.
  • the nucleic acid sequence encoding a peroxisome targeting protein subunit is preferably at least 70% identical to SEQ ID NO: 13, more preferably at least 80% identical to SEQ ID NO: 13, even more preferably at least 90% identical to SEQ ID NO: 13, and most preferably is SEQ ID NO: 13.
  • the nucleic acid sequence encoding a peroxisome targeting protein subunit preferably hybridizes to SEQ ID NO: 13.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16.
  • the length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is preferably at least 70% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, more preferably at least 80% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, even more preferably at least 90% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, further preferably is SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO:15, or SEQ ID NO:16, and most preferably is SEQ ID NO: 15 or SEQ ID NO: 16.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably hybridizes to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16.
  • the encoded peroxisome targeting protein subunit may be an N- terminal or C-terminal peroxisome targeting protein subunit.
  • the encoded N-terminal peroxisome targeting subunit is preferably PTS-2.
  • the encoded C-terminal peroxisome targeting protein subunit preferably comprises a tripeptide.
  • the tripeptide preferably comprises a first amino acid in the N-terminus to C-terminus direction being S, A, or P; a second amino acid in the N-terminus to C-terminus direction being K, R, S, or H; and a third amino acid in the N-terminus to C-terminus direction being L, M, I, or F.
  • the encoded tripeptide preferably is ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes at least a 5 contiguous amino acid sequence from SEQ ID NO:2 or SEQ ID NO:4.
  • the length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:2 or SEQ ID NO:4.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes an amino acid sequence at least 70% identical to SEQ ID NO:2 or SEQ ID NO:4, more preferably at least 80% identical to SEQ ID NO:2 or SEQ ID NO:4, even more preferably at least 90% identical to SEQ ID NO:2 or SEQ ID NO:4, and most preferably is SEQ ID NO:2 or SEQ ID NO:4.
  • the invention discloses a recombinant vector comprising in the 5' to 3' direction a) a promoter that directs transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the fusion protein comprises a peroxisome targeting protein subunit and a polyhydroxyalkanoate synthase protein subunit, b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the fusion protein comprises a peroxisome targeting protein subunit and a polyhydroxyalkanoate synthase protein subunit, and c) a 3' transcription terminator.
  • the recombinant vector may further comprise a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of R A transcribed from the structural nucleic acid coding sequence.
  • the recombinant vector may further comprise a selectable marker.
  • the selectable marker may generally be any selectable marker suitable for the intended host cell or plant, and preferably is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker.
  • the promoter may be constitutive, inducible, tissue specific, or combinations thereof.
  • the constitutive promoter may generally any constitutive promoter suitable for the intended host cell or plant, and preferably is CaMV35S, enhanced CaMV35S, FMV, mas, nos, or ocs.
  • the inducible promoter may generally be any inducible promoter suitable for the intended host cell or plant, and preferably is tac, salicylic acid induced, polyacrylic acid induced, safener induced, heat shock promoter, nitrate induced, hormone induced, or light induced.
  • the tissue specific promoter may generally be any tissue specific promoter suitable for the intended host cell or plant, and preferably is the ⁇ -conglycinin 7S promoter, napin promoter, phaseolin promoter, zein promoter, soybean trypsin inhibitor promoter, ACP promoter, stearoyl-ACP desaturase promoter, or oleosin promoter.
  • the nucleic acid sequence encoding a peroxisome targeting protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO: 13.
  • the length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO: 13.
  • the nucleic acid sequence encoding a peroxisome targeting protein subunit is preferably at least 70% identical to SEQ ID NO: 13, more preferably at least 80% identical to SEQ ID NO: 13, even more preferably at least 90% identical to SEQ ID NO: 13, and most preferably is SEQ ID NO: 13.
  • the nucleic acid sequence encoding a peroxisome targeting protein subunit preferably hybridizes to SEQ ID NO: 13.
  • the encoded peroxisome targeting protein subunit may be an N-terminal or C-terminal peroxisome targeting protein subunit.
  • the encoded N-terminal peroxisome targeting subunit is preferably PTS-2.
  • the encoded C- terminal peroxisome targeting protein subunit preferably comprises a tripeptide.
  • the tripeptide preferably comprises a first amino acid in the N-terminus to C-terminus direction being S, A, or P; a second amino acid in the N-terminus to C-terminus direction being K, R, S, or H; and a third amino acid in the N-terminus to C-terminus direction being L, M, I, or F.
  • the encoded tripeptide preferably is ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
  • the encoded polyhydroxyalkanoate synthase protein subunit is preferably a Pseudomonas subunit, and more preferably is a Pseudomonas aeruginosa subunit.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO:15, or SEQ ID NO:16.
  • the length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is preferably at least 70% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, more preferably at least 80% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, even more preferably at least 90% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, further preferably is SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, and most preferably is SEQ ID NO: 15 or SEQ ID NO: 16.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably hybridizes to SEQ ID NO: l , SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes at least a 5 contiguous amino acid sequence from SEQ ID NO:2 or SEQ ID NO:4.
  • the length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:2 or SEQ ID NO:4.
  • the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes an amino acid sequence at least 70% identical to SEQ ID NO:2 or SEQ ID NO:4, more preferably at least 80% identical to SEQ ID NO:2 or SEQ ID NO:4, even more preferably at least 90% identical to SEQ ID NO:2 or SEQ ID NO:4, and most preferably is SEQ ID NO:2 or SEQ ID NO:4.
  • the structural nucleic acid sequence preferably comprises SEQ ID NO: 17 or SEQ ID NO: 19, and preferably encodes SEQ ID NO: 18 or SEQ ID NO:20.
  • the invention encompasses a recombinant host cell comprising a nucleic acid segment encoding a non-naturally occurring fusion protein, wherein the nucleic acid segment comprises a nucleic acid sequence encoding a peroxisome targeting protein subunit and a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit.
  • the recombinant host cell may generally be any type of host cell, and preferably is a fungal or plant host cell.
  • the fungal cell is generally any type of fungal cell, and preferably a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell.
  • the plant cell is generally any type of plant cell, and preferably an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • the recombinant host cell may further comprise a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase.
  • a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase.
  • a further alternative embodiment describes a genetically transformed plant cell comprising in the 5' to 3' direction: a) a promoter to direct transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) a 3' transcription terminator sequence; and d) a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides
  • the plant cell is generally any type of plant cell, and preferably an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • the plant cell may further comprise a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase.
  • An additional embodiment describes a genetically transformed plant comprising in the 5' to 3' direction: a) a promoter to direct transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) a 3' transcription terminator sequence; and d) a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the
  • the plant may generally be any type of plant, and preferably an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant.
  • the promoter may be constitutive, inducible, tissue specific, or combinations thereof.
  • the constitutive promoter may generally any constitutive promoter suitable for the intended plant, and preferably is CaMV35S, enhanced CaMV35S, FMV, mas, nos, or ocs.
  • the inducible promoter may generally be any inducible promoter suitable for the intended plant, and preferably is tac, salicylic acid induced, polyacrylic acid induced, safener induced, heat shock promoter, nitrate induced, hormone induced, or light induced.
  • the tissue specific promoter is generally any tissue specific promoter, and preferably is the ⁇ -conglycinin 7S promoter, napin promoter, phaseolin promoter, zein promoter, soybean trypsin inhibitor promoter, ACP promoter, stearoyl-ACP desaturase promoter, or oleosin promoter.
  • the plant may further comprise a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase.
  • the invention describes a method for preparing host cells useful to produce a non- naturally occurring fusion protein comprising the steps of: a) selecting a host cell b) transforming the selected host cell with a recombinant vector having a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; and c) obtaining transformed host cells.
  • the vector may further comprise a selectable marker.
  • the selectable marker may generally be any selectable marker suitable for use in the intended host cell, and more preferably for plants is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker.
  • the host cell may generally be any type of cell, and preferably is a fungal or plant cell.
  • the fungal cell may generally be any type of fungal cell, and more preferably is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell.
  • the plant cell may generally be any type of plant cell, and more preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • an alfalfa banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • the invention further describes a method of preparing a transformed plant useful to produce a non-naturally occurring fusion protein comprising the steps of: a) selecting a host plant cell b) transforming the selected host cell with a recombinant vector having a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) obtaining transformed host plant cells; and d) regenerating the transformed host plant cells.
  • the vector may further comprise a selectable marker.
  • the selectable marker may generally be any selectable marker suitable for use in the intended host cell, and more preferably is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker.
  • the host plant cell may generally be any type of plant cell, and more preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • the invention also encompasses the plant made by the above described methods.
  • a preferred embodiment is a method for the preparation of a polyhydroxyalkanoate, comprising the steps of: a) obtaining a cell capable of producing a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; b) establishing a culture of the cell; and c) culturing the cell under conditions suitable for the production of the polyester.
  • the method may further comprise isolating the polyhydroxyalkanoate from the cultured cell.
  • the culture may further comprise fatty acids, and more preferably natural fatty acids, non-natural or synthetic fatty acids, or mixtures thereof.
  • the cell may generally be any type of cell, and preferably is a fungal or plant cell.
  • the fungal cell may generally be any type of fungal cell, and more preferably is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell.
  • the plant cell may generally be any type of plant cell, and more preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • an alfalfa banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
  • the polyhydroxyalkanoate isolated from the cell may generally be any type of polyhydroxyalkanoate, and preferably comprises 3-hydroxyhexanoic acid (H:6), 3- hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3-hydroxyhexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3 -hydroxy nonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3-hydroxyhexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2), 3 -hydroxy hexadecenoic acid (H16:l), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:
  • the invention presents a method for the preparation of a polyhydroxyalkanoate, comprising the steps of: a) obtaining a plant capable of producing a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; and c) growing the plant under conditions suitable for the production of the polyhydroxyalkanoate.
  • the method may further comprise the step of isolating the polyhydroxyalkanoate from the plant.
  • the method may further comprise supplementing the plant with natural fatty acids, non-natural fatty acids, or mixtures thereof.
  • the plant may generally be any type of plant, and preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant.
  • alfalfa banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant.
  • the polyhydroxyalkanoate isolated from the plant may generally be any type of polyhydroxyalkanoate, and preferably comprises 3-hydroxyhexanoic acid (H:6), 3- hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3-hydroxydodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3-hydroxyhexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3-hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3-hydroxyhexadecatrienoic acid (HI 6:3), 3- hydroxyhexadecadienoic acid (HI 6:2), 3-hydroxyhexadecenoic acid (HI 6:1), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3- hydroxy
  • the invention further encompasses plants containing polyhydroxyalkanoates, wherein the polyhydroxyalkanoate comprises 3-hydroxyhexanoic acid (H:6), 3- hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3-hydroxyhexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3-hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3 -hydroxy hexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2), 3-hydroxyhexadecenoic acid (H16:l), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3-
  • the invention describes polyhydroxyalkanoates comprising 3 -hydroxy hexadecatrienoic acid (HI 6:3), 3 -hydroxy hexadecadienoic acid (H16:2), 3-hydroxytetradecatrienoic acid (H14:3), or 3-hydroxydodecadienoic acid (H12:2) monomers.
  • FIG. 1 GC-MS analysis of PHA in transgenic plants.
  • Trans-esterified chloroform extracts from phaC 1 -transformed line 3.3 (1 A. IB) and vector-transformed line 21 (IC, ID) were analyzed.
  • IC vector-transformed line 21
  • panels 1A and IC the total ion chromatogram is presented, while on panel IB and ID, only ions with a mass-to-charge ratio of 103 are shown.
  • SEQ ID NO: 1 Wild type PHA synthase C 1 nucleic acid sequence.
  • SEQ ID NO:2 Wild type PHA synthase CI protein sequence.
  • SEQ ID NO:3 Wild type PHA synthase C2 nucleic acid sequence
  • SEQ ID NO:4 Wild type PHA synthase C2 protein sequence.
  • SEQ ID NO:5 Forward PCR primer for PHA synthase CI fusion sequence.
  • SEQ ID NO:6 Reverse PCR primer for PHA synthase CI fusion sequence.
  • SEQ ID NO:7 Forward PCR primer for PHA synthase C2 fusion sequence.
  • SEQ ID NO: 8 Reverse PCR primer for PHA synthase C2 fusion sequence.
  • SEQ ID NO:9 Wild type isocitrate lyase nucleic acid sequence.
  • SEQ ID NO: 10 Wild type isocitrate lyase protein sequence.
  • SEQ ID NO: 11 Forward PCR primer for isocitrate lyase fusion sequence.
  • SEQ ID NO: 12 Reverse PCR primer for isocitrate lyase fusion sequence.
  • SEQ ID NO: 13 Nucleic acid sequence encoding the isocitrate lyase peroxisome targeting protein subunit.
  • SEQ ID NO: 14 Isocitrate lyase peroxisome targeting protein subunit.
  • SEQ ID NO: 15 PHA synthase CI nucleic acid sequence with plant preferred codon.
  • SEQ ID NO: 16 PHA synthase C2 nucleic acid sequence with plant preferred codon.
  • SEQ ID NO: 17 Nucleic acid sequence encoding PHA synthase CI and isocitrate lyase fusion protein.
  • SEQ ID NO: 18 PHA synthase CI and isocitrate lyase fusion protein.
  • SEQ ID NO: 19 Nucleic acid sequence encoding PHA synthase C2 and isocitrate lyase fusion protein.
  • SEQ ID NO:20 PHA synthase C2 and isocitrate lyase fusion protein.
  • SEQ ID NO:21 PCR amplified nucleic acid sequence encoding wild type Candida albicans MFP.
  • SEQ ID NO:22 Wild type Candida albicans MFP protein.
  • Candida albicans MFP SEQ ID NO:24 Candida albicans MFP protein with SKL substitution for AKI.
  • Candida albicans MFP lacking AKI sequence SEQ ID NO:26 Candida albicans MFP protein lacking AKI sequence.
  • Acyl-ACP thioesterase refers to proteins which catalyze the hydrolysis of acyl- ACP thioesters.
  • C-terminal region refers to the region of a peptide, polypeptide, or protein chain from the middle thereof to the end that carries the amino acid having a free a carboxyl group (the C-terminus).
  • CoA refers to coenzyme A.
  • coding sequence refers to the region of continuous sequential nucleic acid triplets encoding a protein, polypeptide, or peptide sequence.
  • encoding DNA refers to chromosomal nucleic acid, plasmid nucleic acid, cDNA, or synthetic nucleic acid which codes on expression for any of the proteins or fusion proteins discussed herein.
  • Fatty acyl hydroxylase refers to proteins which catalyze the conversion of fatty acids to hydroxylated fatty acids.
  • gene refers to chromosomal DNA, plasmid DNA, cDNA, synthetic
  • DNA or other DNA that encodes a peptide, polypeptide, protein, or RNA molecule, and regions flanking the coding sequence involved in the regulation of expression.
  • the term "genome” as it applies to bacteria encompasses both the chromosome and plasmids within a bacterial host cell. Encoding DNAs of the present invention introduced into bacterial host cells can therefore be either chromosomally-integrated or plasmid- localized.
  • the term "genome” as it applies to plant cells encompasses not only chromosomal DNA found within the nucleus, but organelle DNA found within subcellular components of the cell. DNAs of the present invention introduced into plant cells can therefore be either chromosomally-integrated or organelle-localized.
  • Glyoxysome and “peroxisome” refer to the same organelle in a plant.
  • Glyoxysome refers to a type of peroxisome found in germinating seedlings, senescing tissues, or in dark-grown tissues. Glyoxysomes and peroxisomes contain enzymes responsible for the conversion of lipids to carbohydrates.
  • Identity refers to the degree of similarity between two nucleic acid or protein sequences.
  • An alignment of the two sequences is performed by a suitable computer program.
  • a widely used and accepted computer program for performing sequence alignments is CLUSTALW vl .6 (Thompson, et al. Nucl. Acids Res., 22: 4673-4680 (1994)).
  • the number of matching bases or amino acids is divided by the total number of bases or amino acids, and multiplied by 100 to obtain a percent identity. For example, if two 580 base pair sequences had 145 matched bases, they would be 25 percent identical. If the two compared sequences are of different lengths, the number of matches is divided by the shorter of the two lengths. For example, if there were 100 matched amino acids between 200 and a 400 amino acid proteins, they are 50 percent identical with respect to the shorter sequence.
  • microbe or “microorganism” refer to algae, bacteria, fungi, and protozoa.
  • N-terminal region refers to the region of a peptide, polypeptide, or protein chain from the amino acid having a free a amino group to the middle of the chain.
  • Nucleic acid refers to ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).
  • nucleic acid segment is a nucleic acid molecule that has been isolated free of total genomic DNA of a particular species, or that has been synthesized. Included with the term “nucleic acid segment” are DNA segments, recombinant vectors, plasmids, cosmids, phagemids, phage, viruses, etcetera.
  • “Overexpression” refers to the expression of a polypeptide or protein encoded by a DNA introduced into a host cell, wherein said polypeptide or protein is either not normally present in the host cell, or wherein said polypeptide or protein is present in said host cell at a higher level than that normally expressed from the endogenous gene encoding said polypeptide or protein.
  • plastid refers to the class of plant cell organelles that includes amyloplasts, chloroplasts, chromoplasts, elaioplasts, eoplasts, etioplasts, leucoplasts, and proplastids. These organelles are self-replicating, and contain what is commonly referred to as the "chloroplast genome,” a circular DNA molecule that ranges in size from about 120 to about 217 kb, depending upon the plant species, and which usually contains an inverted repeat region (Fosket, Plant growth and Development, Academic Press, Inc., San Diego, CA, p. 132 (1994)).
  • Polyadenylation signal or “polyA signal” refers to a nucleic acid sequence located
  • polyhydroxyalkanoate (or PHA) synthase refers to enzymes that convert hydroxyacyl-CoAs to polyhydroxyalkanoates and free CoA.
  • promoter refers to a nucleic acid sequence, usually found upstream (5') to a coding sequence, that controls expression of the coding sequence by controlling production of messenger RNA (mRNA) by providing the recognition site for RNA polymerase and/or other factors necessary for start of transcription at the correct site.
  • mRNA messenger RNA
  • a promoter or promoter region includes variations of promoters derived by means of Hgation to various regulatory sequences, random or controlled mutagenesis, and addition or duplication of enhancer sequences.
  • the promoter region disclosed herein, and biologically functional equivalents thereof, are responsible for driving the transcription of coding sequences under their control when introduced into a host as part of a suitable recombinant vector, as demonstrated by its ability to produce mRNA.
  • Protein subunit refers to a protein sequence that is part of a fusion protein.
  • Examples are ⁇ -galactosidase, FLAG, green fluorescent protein, and in the instant invention, polyhydroxyalkanoate synthase, and a peroxisome or glyoxysome targetting peptide.
  • PTS2 refers to an N-terminal protein subunit having the sequence (R/K)(L/Q/I)XXXXX(H/Q)L, wherein X is any amino acid.
  • Regeneration refers to the process of growing a plant from a plant cell (e.g., plant protoplast or explant).
  • Transformation refers to a process of introducing an exogenous nucleic acid sequence (e.g., a vector, recombinant nucleic acid molecule) into a cell or protoplast in which that exogenous nucleic acid is incorporated into a chromosome or is capable of autonomous replication.
  • exogenous nucleic acid sequence e.g., a vector, recombinant nucleic acid molecule
  • a “transformed cell” or “transgenic cell” is a cell whose DNA has been altered by the introduction of an exogenous nucleic acid molecule into that cell.
  • a "transformed plant” or “transgenic plant” is a plant whose DNA has been altered by the introduction of an exogenous nucleic acid molecule into that plant, or by the introduction of an exogenous nucleic acid molecule into a plant cell from which the plant was regenerated or derived.
  • the phaCl and phaC2 genes were obtained from Steinb ⁇ chel (Timm, A. and Steinb ⁇ chel, A., Eur. J. Biochem. 209: 14-30 (1992), GenBank Accession Number X66592). PCR was used to amplify the genes and to modify their 5'- and 3'-termini as follows: At the 5 '-end the codons encoding the serine-2 and the arginine-2 residue of phaCl and phaC2, respectively, were modified to conform more closely with the general codon preferences of A. thaliana (Meyerowitz, E. M. in Methods in Arabidopsis research , eds. Koncz, C, Chua, N.-H. & Schell, J.
  • a PCR product encoding the ICL targeting sequence was cloned into the vector pART7 (Gleaves, A.P., Plant Mol. Biol. 20: 1202-1207 (1992), GenBank Accession Number X69707).
  • the PCR products containing the phaCl or phaC '2 genes were cloned 5 '-upstream of the ICL sequence to produce a contiguous open reading frame encoding the targeted fusion proteins.
  • the 5'- and 3'-ends of the genes in the resulting plasmids pART7_phaCl_ICL and pART7_phaC2_ICL were sequenced to verify the modifications.
  • the PHA accumulation-deficient mutant Pseudomonas putida KT2440 NK2:3 was obtained from Steinb ⁇ chel for complementation studies to verify the enzyme activities of the modified PHA synthases CI and C2.
  • the phaCI ICL and phaC2_ICL genes were cloned into the broad-host range plasmid pVLT35 behind the IPTG-inducible tac -promoter (Lorenzo, V. et al., Gene 123: 17-24 (1993)) and electroporated into the P. putida mutant. Streptomycin-resistant transformants were subcultured onto minimal medium containing either octanoate or gluconate as sole carbon source.
  • the Nile Blue A fluorescence stain (Page, W. J. and C. J. Tenove, Biotechnology Techniques 10: 215-220 (1996)) was used to visualize PHA accumulation.
  • IPTG induction PHA accumulation was observed with pVLT35_phaCl_ICL and pVLT35_phaC2_ICL, but not with pVLT35 alone, thus indicating that the modified genes were still active.
  • the Notl-cassettes of plasmids pART7_phaCl_ICL and pART7_phaC2_ICL containing the modified genes flanked by the Cauliflower mosaic virus 35S promoter (CaMV35S) and the octapine synthase (ocs) 3 '-terminator were cloned into the plant binary vector pART27 to obtain pART27_phaCl_ICL and pART27_phaC2_ICL.
  • These plasmids were transformed into A. thaliana ecotype Columbia by Agrobacterium GV3101 -mediated transfer utilizing an in planta vacuum-infiltration method (Bechtold, N. et al., C.R. Acad. Sci.
  • Transgenic Tl plants were selected for antibiotic resistance during germination of the seeds of infiltrated plants on plant growth medium containing mineral salts, sucrose and kanamycin. Negative control plants containing only the insert-less T-DNA of the vector pART27 were obtained in the same way.
  • Transgenic PHAC1 plants (Tl) expressing high amounts of PHA synthase CI were selected by Western analysis with an antiserum against the PHA synthase CI, which was obtained from Steinb ⁇ chel's laboratory. Unfortunately no antibodies against PHA synthase C2 were found to be suitable, so a different screening strategy was used, see below.
  • Six independent lines expressing varying quantities of PHA synthase CI were obtained from 12 originally infiltrated plants, which had been harvested individually (another 19 have not yet been investigated). Initially some problems with the western analysis were encountered, one of which was the precipitation of the PHA synthase in plant protein extracts upon freezing.
  • H6 which was from Beat Keller
  • D-3-hydroxy-hexanoic acid (3- OH-caproic acid, H6 monomer
  • DL-3-hydroxy-octanoic acid (3-OH-caprylic acid.
  • H8 monomer DL-3-hydroxy-capric acid (H10 monomer)
  • DL-3-hydroxy-lauric acid HI 2 monomer
  • DL-3-hydroxy-myristic acid HI 4 monomer
  • the transgenic plants expressing the PHA synthase CI showed a significant increase in the size of the peaks corresponding to the H6-H14 monomers compared to the negative control plants.
  • One novel peak was found only in PHAC1 plants and never in the negative controls.
  • GC-MS was used to confirm that the peaks observed in both the PHAC1 plants and the negative controls were really identical to the standards and the novel peak was determined as being due to 3-hydroxy-octenoyl-methyl-ester containing a single unsaturated bond (H8:l monomer).
  • the H6 monomer would then have to originate from the fatty acids C18:l, ⁇ 14-cis or C16:l, ⁇ 12-cis, while the H14 monomer would have to originate from C18:l, ⁇ 8-cis, or C16:l, ⁇ 4-cis or C14:l, ⁇ 2-cis, etcetera.
  • C18:l, ⁇ 14-cis or C16:l, ⁇ 12-cis while the H14 monomer would have to originate from C18:l, ⁇ 8-cis, or C16:l, ⁇ 4-cis or C14:l, ⁇ 2-cis, etcetera.
  • fatty acids C18:l, ⁇ 14-cis or C16:l, ⁇ 12-cis
  • H14 monomer would have to originate from C18:l, ⁇ 8-cis, or C16:l, ⁇ 4-cis or C14:l, ⁇ 2-cis, etcetera.
  • fatty acids C
  • negative control plants both A. thaliana wild type and pART27 transgenic plants
  • concentrations present in the negative controls were at least 1000 times smaller than in the positive plants, close to the detection limit of the methods at our availability. This was done by utilizing the GC-MS in the SIM mode (selected ion monitoring; ion 103 is characteristic for all of these 3-OH-fatty acid methyl esters) for which the detection limit was found to be approximately 4 pg/ ⁇ L of the various standards.
  • These compounds in the negative controls might also be intermediates of ⁇ -oxidation, i.e.
  • PHAC2 plants were screened directly for PHA production by analysis of dry leaves of T2 plants. Almost all of the T2 plants derived from 13 independently transformed plants were found to produce PHA in varying quantities, as judged by the presence of the novel peak due to the C8:l monomer and also the peaks of the other PHA monomers. The highest producing plants were analyzed further and homozygous T3 plants were obtained. Two homozygous single-locus T3 lines were selected, PHAC2#19.5 and PHAC2#8.6. In comparison to PHAC1#3.3 plants, these PHAC2 plants produced slightly smaller quantities of PHA in seedlings grown on plates containing MS salts, kanamycin and sucrose. The monomer composition of the respective transgenic plants was however identical. For that reason most of the further studies were only done with line PHACl #3.3.
  • T3 seedlings of lines PHAC1#3.3 and pART27#21 (negative control) were grown on plates containing MS salts, kanamycin and sucrose. Seedlings were grown for 7 days under continuous light or in the dark after one day of illumination, the latter was done to obtain etiolated seedlings in which glyoxysomes are more abundant. The seedlings were fixed and sent together with some anti-PHA synthase CI antiserum to Prof. Leech's laboratory at the University of York, where the immunolocalization was performed.
  • Glycolate oxidase was used as marker enzyme for peroxisomes of seedlings grown under light, while rubisco was used as chloroplastic marker. Antibodies against these two marker enzymes clearly identified the respective organelles in both PHACl seedlings and in the pART27 negative controls. Glycolate oxidase was found to be located in the organelles, i.e. the peroxisomes, containing PHA granules.
  • ICL isocitrate lyase
  • Line PHACl #3.3 was used to investigated if the total yield of PHA could be increased or if PHAs containing other monomers than the "native" PHA could be synthesized in PHACl transgenic plants.
  • seeds were sterilized and germinated in liquid medium containing mineral salts and 2% (w/v) sucrose supplemented with fatty acids or other compounds known to be degraded by ⁇ -oxidation.
  • experiment #1 the seedlings were grown for 3 days in the light before the substrates were added and the plant were moved into the dark. The material was harvested after 8 days and derivatized samples were analyzed by gas chromatography.
  • TWEEN-20 Sigma; 50% palmitic acid (C16) esterified with polyoxyethylenesorbitol, the remainder is made up by lauric acid (C12) and myristic acid (C14) also esterified)
  • TWEEN is a registered trademark of ICI Americas, Inc., Wilmington, DE
  • TWEEN- 20 The most pronounced effect of TWEEN- 20 on the monomer composition was the decrease in the content of the H8:l monomer from about 30% in native PHA to about 1%, which was most likely due to the lack of unsaturated fatty acid derivatives in the TWEEN-20.
  • the relative distribution of the other monomers could be explained by the step-by-step ⁇ -oxidation of the C16, C14 and C12 components in TWEEN-20.
  • a negative effect on seedling growth due to TWEEN-20 was observed, but it was small considering its high concentration (5% v/v) in the medium.
  • TWEEN-60 (Sigma; 50% stearic acid (C18) and some palmitic and myristic acid; all esterified to polyoxyethylenesorbitol) and TWEEN-80 (Sigma; 50% oleic acid (C18:l), esterified to polyoxyethylenesorbitol) had less impact on the PHA yield, the monomer composition and the seedling growth than TWEEN-20.
  • the relatively high level of the H8:l monomer might be due to a higher contamination of TWEEN-60 and -80 with unsaturated fatty acids like ⁇ -linolenic acid, see above.
  • the transesterified plant material (of specified weight) was in a volume of 1 mL chloroform, of which 1 ⁇ L was analyzed by GC.
  • 8-methyl-nonanoic acid (8M-C9) resulted in the incorporation of a whole range of novel monomers.
  • the identity of all these novel monomers was established by GC-MS. All of them had an uneven number of carbon atoms in their acyl chains and could be directly traced to the original fatty acid supplied in the medium or intermediates of its degradation by ⁇ -oxidation.
  • transgenic PHACl plants were found to contain a polymer having HI 3-, HI 1-, H9- and H7-3-hydroxy-alkanoic acid monomers.
  • D-3-hydroxy-acyl-CoA can be formed by the action of the enoyl-CoA hydratase (MFP) from 2-cis-enoyl-CoA (cis-unsaturated bond in even-numbered position), but the D-3-hydroxy-acyl-CoA cannot be utilized by the 3-hydroxy-acyl-CoA dehydrogenase (MFP), which can only act on the L-3-hydroxy-acyl-CoA.
  • MFP enoyl-CoA hydratase
  • MFP 3-hydroxy-acyl-CoA dehydrogenase
  • a dehydratase also called D-3-hydroxyacyl-CoA hydrolyase or D-specific 2- trans-enoyl-CoA hydratase II, see Engeland, K. and Kindl, H., EMr. J. Biochem. 200: 171- 178 (1991) converts the D-3-hydroxy-acyl-CoA to 2-trans-enoyl-CoA, which can then be reconverted to L-3-hydroxy-acyl-CoA by the enoyl-CoA hydratase I.
  • a 2,4-dienoyl- CoA reductase reduces the 2-trans-4-cis-acyl-CoA ⁇ -oxidation intermediate to the 3-cis- enoyl-CoA, which in turn will require the activity of an isomerase to form the 2-trans-enoyl- CoA ⁇ -oxidation intermediate.
  • the first two options would result in the generation of D-3- hydroxy-acyl-CoA intermediates which would be directly available to the PHA synthase.
  • a 8M-H9 and 6M-H7 refer to 8-methyl-3-D-hydroxy-nonanoic acid and 6-methyl-3-D- hydroxy-heptanoic acid, respectively.
  • 4-OH-H10 refers to D-4-hydroxy-decanoate.
  • the quantity of 4-OH-H10 was estimated by comparing peak sizes with H6 on a GC-MS chromatogram.
  • TWEEN-20-derived PHA approximately 16000 seeds (313 mg dry seeds) were germinated in 900 mL l/2xMS + 1% sucrose medium for 7 days under continuous illumination on a shaker, the medium was replaced with l/2xMS + 2% sucrose containing 5% TWEEN-20 and the seedlings were grown for another 9 days in the light.
  • the plant material was harvested, washed extensively with water to remove residual TWEEN-20, frozen and lyophilized.
  • the dry material was ground with a mortar and pestle, weighed, and lipids were extracted by a six-hour Soxhlet-extraction with methanol.
  • the methanol- insoluble PHA was extracted for 24 hours in the same manner with chloroform.
  • the chloroform extract was concentrated under reduced pressure and the PHA was precipitated by the addition of 10 volumes of cold methanol. This methanol precipitation was performed twice to ensure a high purity of the PHA. 27 mg of PHA was thus obtained from 5.35 g lyophilized and powdered seedling material, which related to 0.50% weight/dry weight.
  • the PHA was trans-esterified and analyzed by GC. It was found that 58% of the PHA present in the methanol-extracted plant powder was extracted by the chloroform. It has been established in previous experiments that this remaining PHA was recalcitrant to extraction. The chromatogram showed that the extracted PHA was adequately pure with the peaks of the six identified monomers constituting 93% of the total integrated area. The ratio of the integrated areas between the different monomers was very similar to the result shown in Table 1 for the sample containing TWEEN-20 and grown under light, see Table 4.
  • TWEEN-20 derived PHA produced by the transgenic plants is in the form of a high-M r polymer (about 200-250 monomers), although the molecular weight is only 20-25% of the bacterial polymers (about 1000 monomers).
  • This shorter polymer length can be explained by an overabundance of PHA synthase relative to its substrate concentration and similar results have also been obtained in in vitro polymerization assays with purified PHB synthase (Jun Sim, S. et al., Nature Biotechnology 15: 63-67 (1997)).
  • NMR analysis of the plant and bacterial PHAs revealed, that the TWEEN-20 derived plant PHA had the same structure as the bacterial PHA.
  • the NMR spectrum of the unmodified plant PHA showed the peaks characteristic for the PHA polymer backbone, as well as several other peaks which have not been properly assigned or identified at this stage, but which could be due to various unsaturated bonds in the side chains of the polymer.
  • EXAMPLE 10 The multifunctional protein (MFP) from the yeast Candida tropicalis
  • ⁇ -oxidation has been shown to proceed via the L- isomer of the 3-hydroxy-acyl-CoA intermediates and any D-isomers (which are predicted to arise in the degradation of fatty acids containing cis-unsaturated bonds at even-numbered carbons) have to be converted to the L-form in order to be oxidized further by the dehydrogenase activity of the multifunctional protein (MFP).
  • MFP multifunctional protein
  • yeast the ⁇ -oxidation was reported to proceed via the D-isomer (Nuttley, W. M. et al., Gene 69: 171-180 (1988); Hiltunen, J. K. et al., J. Biol. Chem.
  • the yeast multifunctional protein (MFP) was shown to contain enoyl-CoA hydratase II and D-3-hydroxyacyl-CoA dehydrogenase activities, which together converted trans-2-enoyl-CoA via D-3-hydroxyacyl-CoA to 3-ketoacyl-CoA, i.e. the D- isomer was directly utilized by the dehydrogenase without prior conversion to the L-form.
  • the C. tropicalis MFP cDNA (Nuttley, W. M. et al., Gene 69: 171 -180 (1988), GenBank Accession Number M22765) was cloned via PCR amplification (SEQ ID NO:21 , encoding SEQ ID NO:22) into pART7 to obtain pART7_MFP.
  • the Notl-cassette containing the CAMV35S-promoter in front of the MFP gene and the ocs3'- terminator, was inserted into the plant binary vector pART27 to obtain pART27_MFP, which was transformed into Arabidopsis.
  • Transgenic plant were selected on kanamycin and screened for the expression of the MFP protein with an anti-MFP antiserum. Homozygous T2 plants were cross-fertilized with PHACl #3, PHACl #4 and PHACl #9 plants. Offspring from these crosses will be analyzed for their ability to biosynthesize PHA.
  • the COOH-terminal tripeptide -AKI was shown to be responsible for peroxisomal targeting of the MFP in yeast, but it has not yet been demonstrated to function in plant peroxisomal targeting.
  • SKL gene in which the 3'-terminal nucleotide sequence of the MFP gene encoding the -AKI tripeptide had been changed to -SKL by PCR site-directed mutagenesis (SEQ ID NO:23, encoding SEQ ID NO:24), was obtained from the laboratory of K. Hiltunen to ascertain that the MFP was properly targeted to the plant peroxisomes and to serve as a positive control in targeting studies with the yeast multifunctional protein (MFP) in plant cells.
  • MFP yeast multifunctional protein
  • the MFP.SKL gene was used to construct pART7_MFP.SKL.
  • the Notl-cassette of pART7_MFP.SKL containing the MFP-SKL gene flanked by the CaMV35S promoter and the ocs3'-terminator, was cloned into pART27 to obtain pART27_MFP.SKL, which was transformed into A. thaliana ecotype Columbia. Kanamycin resistant Tl plants were obtained.
  • the high-MFP.SKL-expressing lines will be selected by Western analysis of T2 plants, and the selected lines will be crossed with PHACl #3.3 plants.
  • the construct pART7_MFP ⁇ AKI was obtained by PCR amplification of the MFP gene such that the 3 '-terminal nucleotide sequence of the MFP gene encoding the -AKI tripeptide was deleted by the introduction of a stop codon (SEQ ID NO:25, encoding SEQ ID NO:26).
  • the "detargeted" MFP ⁇ AKI is expected to be localized in the cytoplasm and will be utilized as negative control in experiments to study the localization of MFP and MFP.SKL in plant cells.
  • pART27_MFP ⁇ AKI was transformed into A. thaliana ecotype Columbia and Kanamycin resistant Tl plants were obtained.
  • the high-MFP ⁇ AKI- expressing lines will be selected by Western analysis of T2 plants and these lines will be crossed with PHACl #3.3 plants.
  • EXAMPLE 11 Verification of enzyme activity of modified MFP constructs in Pichia
  • the modified MFP.SKL and MFP ⁇ AKI genes were subcloned from pART7_MFP.SKL and pART7_MFP ⁇ AKI into the yeast expression vector pHILD2.
  • the resulting plasmids pHILD2_MFP.SKL and pHILD2_MFP ⁇ AKI were transformed into Pichia and enzyme assays were performed in Hiltunen's laboratory. Results indicated that the modifications to the genes did not have an effect on the dehydrogenase and the hydratase enzymatic activities.
  • This increased flux of medium-chain fatty acids through ⁇ -oxidation may be exploited to improve the yield of PHA, as well as to modify the composition of the polymer towards saturated H6-H14 monomers in double transgenic plants expressing both acyl-ACP thioesterase and the PHACl synthase.
  • the plasmid pBJ49_FatB3 containing the Cuphea lancolata thioesterase FatB3 gene under control of a 200 bp minimal promoter derived from the 35S promoter was infiltrated into the A. thaliana PHACl #3.3 transgenic line which is homozygous for the PHACl gene.
  • Hygromycin resistant lines where obtained and the seed lipid content of Tl seeds was analysed for increased levels of medium chain length fatty acids and 1 1 separate lines expressing high levels of the acyl-ACP thioesterase were identified in this manner.
  • the increased polyhydroxyalkanoate yield was mainly due to a large increase in the content of the saturated polyhydroxyalkanoate monomers with an even number of carbons, namely 3-OH-octanoate (H8), 3-OH-decanoate (H10), 3-OH-dodecanoate (H12) and 3-OH-tetradecanoate (HI 4) (Table 8).
  • the recombinant FatB3 acyl-ACP thioesterase is naturally targeted to the chloroplast, where it removes medium chain-length acyl-ACP intermediates from the fatty acid biosynthesis.
  • These short chain fatty acids accumulate in the seed lipids, but not in the leaves of transgenic plants and it has been speculated, that they are immediately degraded by ⁇ -oxidation. Results with these double transgenic plants indicate that there is indeed an increase in the ⁇ -oxidation of medium chain length fatty acids in the leaves, which results in a higher yield of polyhydroxyalkanoate due to the incorporation of the ⁇ -oxidation intermediates into the PHA by the polyhydroxyalkanoate synthase.
  • EXAMPLE 13 Crossing PHACl #3.3 transgenic plants with fatty acyl hydroxylase LFahl2 transgenic plants
  • the amount of PHA present in plant tissues was influenced by the growth conditions .
  • the yield of PHA was approximately 0.6 mg/g dry weight (dwt). Removal of sucrose for the last week of growth in the light resulted in a 100% increase in PHA, while plants growing in 2% sucrose but shifted in the dark for the last week accumulated 22% more PHA (Table 9).
  • PTSl peroxisomal targeting sequence 1
  • S, A, or P small uncharged amino acid at position 1
  • K, R. S, or H positively-charged amino acids at position 2
  • L, M, I or F hydrophobic amino acid at position 3
  • the initial minimal PTSl sequence was defined as SKL.
  • a range of substition have been found to be effective PTSl signal, including ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
  • Specific examples of targeting of foreign proteins in plants include: 6 amino acid PTSl (RAVARL, Volokita, M., Plant J ⁇ : 361-366 (1991)); 5 amino acids PTSl (AKSRM, Olsen, L. J. et al, Plant Cell 5: 941-952 (1993)); 4 amino acids PTSl (KSRM, Trelease, R. N.
  • the minimal peroxisomal targeting sequence 1 (PTSl) in plants has been found to be ARM, SRM, SKL, ARL, SRL, PSI, and PRM (Compilation from Volokita, M., Plant J., 1: 361-366 (1991); Olsen, L.J. et al., Plant Cell, 5: 941-952 (1993); Trelease, R.N. et al., Protoplasma, 195: 156-167 (1996); Gietl, C, Physiol Plant., 97: 599-608 (1996); Purdue, P.E. and Lazarow, P.B., J. Biol Chem., 269: 30065-30068 (1994); Subramani, Ann. Rev.
  • PTS2 peroxisome targeting sequence 2
  • a consensus sequnce of nine amino acids has been defined, being (R K)(L/Q/I)XXXXX(H/Q)L.
  • Foreign protein eg ⁇ - glucuronidase
  • PTS2 sequence can also be targeted in plants to the peroxisome by adding a PTS2 sequence at the N-terminal end of the protein (Kato et al, Plant Cell 8: 1601-1611 (1996)).
  • EXAMPLE 16 Co-expression of PHA with other sequences resulting in increased or novel PHA biosynthesis
  • PHA mcl synthesized in transgenic plants can include a large variety of monomers, with functional groups that can be used to modify and improve the characteristics of the polymer before or after extraction form the plant. For example, the presence of double bonds, epoxy groups, or acetylated groups within the PHA may be used to cross-link the polymer.
  • PHA polymers in plants that have a wide range of monomers, for example, higher proportion of short-chain monomers, unsaturated bonds at novel positions, monomers with hydroxylated groups, epoxy groups, acetylated groups, keto groups, cyclopentenyl groups, cyclopropanoid groups, furanoid groups or halogenated groups, branched chain, cyclic groups or any other novel monomers for which the equivalent functional groups exist in fatty acids in plants.
  • monomers for example, higher proportion of short-chain monomers, unsaturated bonds at novel positions, monomers with hydroxylated groups, epoxy groups, acetylated groups, keto groups, cyclopentenyl groups, cyclopropanoid groups, furanoid groups or halogenated groups, branched chain, cyclic groups or any other novel monomers for which the equivalent functional groups exist in fatty acids in plants.
  • the inco ⁇ oration of these novel monomers derived from fatty acids into plant PHAs could be accomplished by expressing a PHA synthase in a plant which synthesizes these unusual fatty acids either naturally or after expression of a transgene such as fatty-acyl-thioesterases, -hydroxylases, -desaturases, - epoxidases, or -acetylases. It is also conceivable that the substrate specificity of the PHA synthase could be modified to allow the inco ⁇ oration of a wider range of monomers into PHA.
  • acetyl-CoA is also found in the peroxisome, one can predict that co-expression of a PHA synthase with a substrate specificity for 3 -hydroxy acids ranging from H4 to H8 or higher in the peroxisome, and of the A. eutrophus acetoacetyl- CoA reductase, would lead to the biosynthesis of a copolymer containing hydroxybutyrate and hydroxyacids of H6 and higher. In this pathway, the expression of the 3-ketothiolase from A. eutrophus may not be required since the peroxisome already contains a 3- ketothiolase.
  • fatty acid modifying enzymes in conjunction with a PHA synthase in plants not only leads to an increase in the amount of PHA synthesized in plants, but also leads to a predictable changes in the PHA monomer composition, e.g. co-expression of a short-chain fatty acyl-ACP thioesterase would lead to an increase in the proportion of short-chain hydroxyacid monomers in plant PHA, co- expression of a long-chain fatty acyl-ACP thioesterase would lead to an increase in the proportion of long-chain hydroxyacid monomers in plant PHA, co-expression of a fatty acyl hydroxylase would lead to an increase in the proportion of hydroxylated hydroxyacid monomers in plant PHA, co-expression of a fatty acyl epoxidase would lead to an increase in the proportion of epoxidated monomers in plant PHA, co-expression of a fatty acyl acetylase would lead to an increase in the proportion of
  • Increase in flux of lipids through the ⁇ -oxidation cycle could also be accomplished by overexpressing the key regulators (i.e. transcriptional factors) involved in the up-regulation of the entire ⁇ -oxidation cycle pathway during germination or senescence. This last approach would have the advantage of turning-on the ⁇ -oxidation cycle in tissues which normally have only low activity, such as the developing seeds of oil crops.
  • the examples herein point out the impact of fatty acid modifying enzymes for the production of novel PHA in transgenic plants expressing a PHA synthase.
  • One key enzyme appears to be a 3-hydroxy-acyl-CoA epimerase.
  • the normal function of the epimerase is to convert D-3-hydroxy-acyl-CoAs to the L-form required for the action of the L-3-hydroxy-acyl-CoA dehydrogenase
  • the reverse reaction of the epimerase can be responsible for converting the L-form to the D-form, which is essential for the activity of the PHA synthase.
  • the epimerase is important for the supply of the substrates for the PHA synthase derived from ⁇ -oxidation in the peroxisomes.
  • Recombinant forms of such an epimerase activity expressed in peroxisomes or in other plant cell compartments like the cytoplasm or the plastids could play an important role in the production of PHA in transgenic plants. It is possible that the slow rate of the epimerase "reverse reaction" could be the major factor limiting the supply of substrates for the PHA synthase. The substrate limitation due to this could be the reason why PHA synthesis seemed to have reached a maximum in seedlings germinated both in the light and in the dark in liquid medium supplemented with TWEEN-20, which contains only saturated fatty acids.
  • the H8 and the H8:l monomer are predicted to originate from the unsaturated fatty acids linoleic acid (C18:2, 9,12-all cis) and linolenic acid (C18:3, 9,12,15-all cis). For that reason any plant containing high levels of fatty acids with unsaturated bonds starting at even-numbered carbons could be of interest for the production of PHA mcl , or the transgenic expression of suitable fatty acid desaturases producing such unsaturated fatty acids in plants containing the PHA synthase would be similarly attractive for PHA production and monomer manipulation.
  • Fatty acid biosynthesis occurs in the plastids in plant cells, and modifications of this pathway could turn the plastids into a suitable source of D-3-hydroxy-acyl-CoA intermediates, which could subsequently be used to produce PHA either in the plastid itself or in other cell compartments.
  • Leaves from transgenic plants were homogenized in 200 mM Tris-HCl (pH 7.5), 250 mM EDTA, 5 mM dithiothreitol and 1 mM phenylmethylsulfonyl fluoride. The homogenate was clarified by centrifugation and protein analyzed by Western blot using the ECL detection system (Amersham, Arlington Heights, IL).
  • Transgenic plants were grown on media containing MS salts, 1% sucrose, 0.7% agar and 50 ⁇ g/mL kanamycin for either 7 days in the light or 1 day in the light followed by 6 days in the dark.
  • Whole plants were fixed for 2 hours at room temperature in 4% formaldehyde, 0.5% glutaraldehyde, 50 mM sodium cacodylate pH 7.3.
  • the tissue samples were dehydrated in an ethanol series and embedded in LR White resin.
  • Ultra thin sections were cut using a microtome, mounted on formvar-coated gold grids and blocked in 0.8% (w/v) bovine serum albumin, 0.1% (w/v) gelatine, 5% (w/v) normal goat serum and 2 mM sodium azide in PBS (10 mM sodium phosphate, 150 mM sodium chloride, pH 7.4).
  • Grids were incubated for 1 hour at room temperature with antiserum against PHA synthase (1 :50), glycolate oxidase (1:2000) and isocitrate lyase (1 : 1000) in the blocking solution followed by a 4 hour incubation at room temperature with a 1 :50 dilution of gold-conjugated goat anti- rabbit antibodies (15 nm gold particles) in PBS. Immunolabeled sections were doubled- stained with uranyl acetate and lead citrate and viewed with a Jeol JEM transmission electron microscope.
  • Fresh or dried frozen plant material was ground in a mortar and lyophilized.
  • the powder was extracted with methanol in a Soxhlet apparatus for 24 hours followed by PHA extraction with chloroform for 24 hours, both at 85°C.
  • the PHA-containing chloroform was concentrated under reduced pressure and extracted once with water to remove residual solid particles.
  • PHA was precipitated by the addition of 10 volumes of cold methanol and subsequently washed by two cycles of chloroform solubilisation and methanol precipitation.
  • PHA dissolved in chloroform was transesterified by acid methanolysis (Huijberts, G. N. et al., Appl. Environ. Microbiol.
  • transformation vectors capable of introducing encoding DNAs involved in PHA biosynthesis are easily designed, and generally contain one or more DNA coding sequences of interest under the transcriptional control of 5' and 3' regulatory sequences.
  • Such vectors generally comprise, operatively linked in sequence in the 5' to 3' direction, a promoter sequence that directs the transcription of a downstream heterologous structural DNA in a plant; optionally, a 5' non-translated leader sequence; a nucleotide sequence that encodes a protein of interest; and a 3' non-translated region that encodes a polyadenylation signal which functions in plant cells to cause the termination of transcription and the addition of polyadenylate nucleotides to the 3' end of the mRNA encoding said protein.
  • Plant transformation vectors also generally contain a selectable marker. Typical 5 '-3' regulatory sequences include a transcription initiation start site, a ribosome binding site, an RNA processing signal, a transcription termination site, and/or a polyadenylation signal.
  • Vectors for plant transformation have been reviewed in Rodriguez et al. (Vectors: A Survey of Molecular Cloning Vectors and Their Uses, Butterworths, Boston. (1988)), Glick et al. (Methods in Plant Molecular Biology and Biotechnology, CRC Press, Boca Raton, Fla. (1993)), and Croy (Plant Molecular Biology Labfax, Hames and Rickwood (Eds.), BIOS Scientific Publishers Limited, Oxford, UK. (1993)).
  • Plant promoter sequences can be constitutive or inducible, environmentally- or developmentally-regulated, or cell- or tissue-specific. Often-used constitutive promoters include the CaMV 35S promoter (Odell et al., Nature 313: 810 (1985)), the enhanced CaMV 35S promoter, the Fig wort Mosaic Virus (FMV) promoter (Richins et al., Nucleic Acids Res. 20: 8451 (1987)), the mannopine synthase (mas) promoter, the nopaline synthase (nos) promoter, and the octopine synthase (ocs) promoter.
  • CaMV 35S promoter Odell et al., Nature 313: 810 (1985)
  • the enhanced CaMV 35S promoter the Fig wort Mosaic Virus (FMV) promoter
  • FMV Fig wort Mosaic Virus
  • mannopine synthase mas
  • Useful inducible promoters include promoters induced by salicylic acid or polyacrylic acids (PR-1 , Williams , S. W. et al, Biotechnology 10: 540-543 (1992)), induced by application of safeners (substituted benzenesulfonamide herbicides, Hershey, H.P. and Stoner, T.D., Plant Mol. Biol. 17: 679- 690 (1991)), heat-shock promoters (Ou-Lee et al., Proc. Natl. Acad. Sci U.S.A. 83: 6815 (1986); Ainley et al., Plant Mol. Biol.
  • tissue-specific, developmentally-regulated promoters include the ⁇ -conglycinin 7S promoter (Doyle et al, J. Biol. Chem. 261 : 9228 (1986); Slighton and Beachy, Planta 172: 356 (1987)), and seed-specific promoters (Knutzon et al., Proc.
  • Plant functional promoters useful for preferential expression in seed plastids include those from plant storage protein genes and from genes involved in fatty acid biosynthesis in oilseeds. Examples of such promoters include the 5' regulatory regions from such genes as napin (Kridl et al., Seed Sci. Res.
  • Promoter hybrids can also be constructed to enhance transcriptional activity (Comai, L. and Moran, P.M., U.S. Patent No. 5,106,739, issued April 21, 1992), or to combine desired transcriptional activity and tissue specificity.
  • a variety of different methods can be employed to introduce such vectors into plant protoplasts, cells, callus tissue, leaf discs, meristems, etcetera, to generate transgenic plants, including Agrobacterium-mediated transformation, particle gun delivery, microinjection, electroporation, polyethylene glycolmediated protoplast transformation, liposome-mediated transformation, etc. (reviewed in Potrykus, Ann. Rev. Plant Physiol. Plant Mol. Biol. 42: 205 (1991)).
  • transgenic plants comprising cells containing and expressing DNAs encoding enzymes facilitating PHA biosynthesis can be produced by transforming plant cells with a DNA construct as described above via any of the foregoing methods; selecting plant cells that have been transformed on a selective medium; regenerating plant cells that have been transformed to produce differentiated plants; and selecting a transformed plant which expresses the enzyme-encoding nucleotide sequence.
  • Particularly useful plants for PHA production include those that produce carbon substrates which can be employed for PHA biosynthesis, including tobacco, wheat, potato, Arabidopsis, and high oil seed plants such as corn, soybean, canola, oil seed rape, sunflower, flax, peanut, sugarcane, switchgrass, and alfalfa.
  • the host plant of choice does not produce the requisite fatty acid substrates in sufficient quantities, it can be modified, for example by mutagenesis or genetic transformation, to block or modulate the glycerol ester and fatty acid biosynthesis or degradation pathways so that it accumulates the appropriate substrates for PHA production.
  • Expression of enzymes such as acyl-ACP thioesterase, fatty acyl hydroxylase, and yeast multifunctional protein (MFP) may serve to increase the flux of substrates in the peroxisome, leading to higher levels of PHA biosynthesis.
  • nucleic acid sequence encoding a fusion protein may lead to mutant protein sequences that display equivalent or superior enzymatic characteristics when compared to the sequences disclosed herein.
  • This invention accordingly encompasses nucleic acid sequences which are similar to the sequences disclosed herein, protein sequences which are similar to the sequences disclosed herein, and the nucleic acid sequences that encode them. Mutations may include deletions, insertions, truncations, substitutions, fusions, and the like.
  • Mutations to a nucleic acid sequence may be introduced in either a specific or random manner, both of which are well known to those of skill in the art of molecular biology.
  • Random or non-specific mutations may be generated by chemical agents (for a general review, see Singer and Kusmierek, Ann. Rev. Biochem. 52: 655-693 (1982)) such as nitrosoguanidine (Cerda-Olmedo et al., J. Mol Biol. 33:705-719 (1968); Guerola, et al. Nature New Biol. 230: 122-125 (1971)) and 2-aminopurine (Rogan and Bessman, J. Bacteriol 103: 622-633 (1970)), or by biological methods such as passage through mutator strains (Greener et al. Mol. Biotechnol. 7: 189-195 (1997)).
  • Nucleic acid hybridization is a technique well known to those of skill in the art of DNA manipulation.
  • the hybridization properties of a given pair of nucleic acids is an indication of their similarity or identity.
  • Mutated nucleic acid sequences may be selected for their similarity to the disclosed nucleic acid sequences on the basis of their hybridization to the disclosed sequences.
  • Low stringency conditions may be used to select sequences with multiple mutations.
  • High stringency conditions may be used to select for nucleic acid sequences with higher degrees of identity to the disclosed sequences.
  • Conditions employed may include about 0.02 M to about 0.15 M sodium chloride, about 0.5% to about 5% casein, about 0.02% SDS and/or about 0.1% N-laurylsarcosine, about 0.001 M to about 0.03 M sodium citrate, at temperatures between about 50°C and about 70°C. More preferably, high stringency conditions are 0.02 M sodium chloride, 0.5% casein, 0.02% SDS, 0.001 M sodium citrate, at a temperature of 50°C.
  • Modification and changes may be made in the sequence of the proteins of the present invention and the nucleic acid segments which encode them and still obtain a functional molecule that encodes a protein with desirable properties.
  • the following is a discussion based upon changing the amino acid sequence of a protein to create an equivalent, or possibly an improved, second-generation molecule.
  • the amino acid changes may be achieved by changing the codons of the nucleic acid sequence, according to the codons given in Table 1 1.
  • Certain amino acids may be substituted for other amino acids in a protein sequence without appreciable loss of enzymatic activity. It is thus contemplated that various changes may be made in the peptide sequences of the disclosed protein sequences, or their corresponding nucleic acid sequences without appreciable loss of the biological activity.
  • the hydropathic index of amino acids may be considered.
  • the importance of the hydropathic amino acid index in conferring interactive biological function on a protein is generally understood in the art (Kyte and Doolittle, J. Mol. Biol.,
  • Each amino acid has been assigned a hydropathic index on the basis of their hydrophobicity and charge characteristics. These are: isoleucine (+4.5); valine (+4.2); s leucine (+3.8); phenylalanine (+2.8); cysteine/cystine (+2.5); methionine (+1.9); alanine (+1.8); glycine (-0.4); threonine (-0.7); serine (-0.8); tryptophan (-0.9); tyrosine (-1.3); proline (-1.6); histidine (-3.2); glutamate/glutamine/aspartate/asparagine (-3.5); lysine (- 3.9); and arginine (-4.5).
  • amino acids may be substituted by other amino 0 acids having a similar hydropathic index or score and still result in a protein with similar biological activity, i.e., still obtain a biologically functional protein.
  • substitution of amino acids whose hydropathic indices are within ⁇ 2 is preferred, those within ⁇ 1 are more preferred, and those within ⁇ 0.5 are most preferred.
  • hydrophihcity values have been assigned to amino acids: arginine/lysine (+3.0); aspartate/glutamate (+3.0 ⁇ 1); serine (+0.3); 0 asparagine/glutamine (+0.2); glycine (0); threonine (-0.4); proline (-0.5 ⁇ 1); alanine/histidine (-0.5); cysteine (-1.0); methionine (-1.3); valine (-1.5); leucine/isoleucine (- 1.8); tyrosine (-2.3); phenylalanine (-2.5); and tryptophan (-3.4).
  • amino acid may be substituted by another amino acid having a similar hydrophihcity score and still result in a protein with similar biological activity, i.e., 5 still obtain a biologically functional protein.
  • substitution of amino acids whose hydropathic indices are within +2 is preferred, those within ⁇ 1 are more preferred, and those within ⁇ 0.5 are most preferred.
  • amino acid substitutions are therefore based on the relative similarity of the amino acid side-chain substituents, for example, their hydrophobicity, hydrophihcity, charge, size, and the like.
  • substitutions which take various of the foregoing characteristics into consideration are well known to those of skill in the art and include: arginine and lysine; glutamate and aspartate; serine and threonine; glutamine and asparagine; and valine, leucine, and isoleucine. Changes which are not expected to be advantageous may also be used if these resulted in functional fusion proteins.
  • compositions and/or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this invention have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the methods described herein without departing from the concept, spirit and scope of the invention. More specifically, it will be apparent that certain agents which are both chemically and physiologically related may be substituted for the agents described herein while the same or similar results would be achieved. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the invention.
  • CAGAGCATCC TCAACCCACC GGGCAACCCC AAGGCACGCT TCATGACCAA TCCGGAACTG 1500
  • Gin Ser lie Leu Asn Pro Pro Gly Asn Pro Lys Ala Arg Phe Met Thr 485 490 495
  • Lys Glu Leu Phe Asn Thr Gly Gly lie Ser Leu Leu Asn Gly Val Arg 145 150 155 160 His Leu Leu Glu Asp Leu Val His Asn Gly Gly Met Pro Ser Gin Val 165 170 175 ys Thr Ala Phe Glu lie Gly Arg Asn Leu Ala Thr Thr Gin Gly 180 185 190
  • Thr Ala Val Asp Leu Gly Lys Val Ala lie Asp Ser Phe His Val Ala 435 440 445 Gly lie Thr Asp His lie Thr Pro Trp Asp Ala Val Tyr Arg Ser Ala 450 455 460 Leu Leu Leu Gly Gly Gin Arg Arg Phe lie Leu Ser Asn Ser Gly His 465 470 475 480 lie Gin Ser lie Leu Asn Pro Pro Gly Asn Pro Lys Ala Cys Tyr Phe 485 490 495
  • CAGAGCATCC TCAACCCACC GGGCAACCCC AAGGCACGCT TCATGACCAA TCCGGAACTG 1500
  • CAGAGCATCC TCAACCCACC GGGCAACCCC AAGGCACGCT TCATGACCAA TCCGGAACTG 1500 CCCGCCGAGC CCAAGGCCTG GCTGGAACAG GCCGGCAAGC ACGCCGACTC GTGGTGGTTG 1560
  • Gin Ser lie Leu Asn Pro Pro Gly Asn Pro Lys Ala Arg Phe Met Thr 485 490 495 Asn Pro Glu Leu Pro Ala Glu Pro Lys Ala Trp Leu Glu Gin Ala Gly
  • Leu Leu Leu Leu Gly Gly Gin Arg Arg Phe lie Leu Ser Asn Ser Gly His 465 470 475 480 He Gin Ser He Leu Asn Pro Pro Gly Asn Pro Lys Ala Cys Tyr Phe
  • GGTAAGTCAC AAAACTCCTT TGCCAAGTTG TTGCGTAACT TCAACCCAAT GTTGTTGTTG 2100
  • GACTCTAGGA AGCCAGAATA CTTGAAGAAC CAATACCCAT TCATGTTGAA CGACTACGCC 900
  • ACTTTGACCA ACGAAGCTAG AAAGTTGCCA GCTAACGATG CTTCTGGTGC TCCAACTGTC 960 TCCTTGAAGG ACAAGGTTGT TTTGATCACC GGTGCCGGTG CTGGTTTGGG TAAAGAATAC 1020 GCCAAGTGGT TCGCCAAGTA CGGTGCCAAG GTTGTTGTTA ACGACTTCAA GGATGCTACC 1080
  • ATCAGAAACT GTCAAGCCGA CAACAAGGTC TACGCTGACC GTCCAGCATT CGCCACCAAC 2340 CAATTCTTGG CACCAAAGAG AGCCCCAGAC TACCAAGTTG ACGTTCCAGT CAGTGAAGAC 2400
  • GACTCTAGGA AGCCAGAATA CTTGAAGAAC CAATACCCAT TCATGTTGAA CGACTACGCC 900
  • GGTAAGTCAC AAAACTCCTT TGCCAAGTTG TTGCGTAACT TCAACCCAAT GTTGTTGTTG 2100

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Abstract

Nucleic acids, proteins, and methods for the biosynthesis of polyhydroxyalkanoate polymer materials are disclosed. In a preferred embodiment, expression of a polyhydroxyalkanoate synthase protein with a peroxisome targeting peptide results in the biosynthesis of medium chain length polyhydroxyalkanoates. In an alternative embodiment, exogenous addition of fatty acids to a plant or cell containing a peroxisome targeted polyhydroxyalkanoate synthase protein leads to the biosynthesis of novel polymeric materials.

Description

BIOSYNTHESIS OF MEDIUM CHAIN LENGTH POLYHYDROXYALKANOATES
FIELD OF THE INVENTION
The invention relates to the biosynthesis of polymers and more specifically to the biosynthesis of polyhydroxyalkanoate polymers in plants. In particular, a transgenic plant producing peroxisome- or glyoxysome-targeted polyhydroxyalkanoate synthase resulting in the production of polyhydroxyalkanoate materials.
BACKGROUND OF THE INVENTION
PHAs are bacterial polyesters that accumulate in a wide variety of bacteria. These polymers have properties ranging from stiff and brittle plastics to rubber-like materials, and are biodegradable. Because of these properties, PHAs are an attractive source of nonpolluting plastics and elastomers.
Currently, there are approximately a dozen biodegradable plastics in commercial use that possess properties suitable for producing a number of specialty and commodity products (Lindsay, Modern Plastics 2: 62 (1992)). One such biodegradable plastic in the polyhydroxyalkanoate (PHA) family that is commercially important is Biopol™, a random copolymer of 3 -hydroxy butyrate (3HB) and 3 -hydroxy vai erate (3HV). This bioplastic is used to produce biodegradable molded material (e.g., bottles), films, coatings, and in drug release applications. Biopol™ is produced via a fermentation process employing the bacterium Alcaligenes eutrophus (Byrom, Trends Biotechnol. 5: 246 (1987)). The current market price is $6-7/lb, and the annual production is 1,000 tons. By best estimates, this price can be reduced only about 2-fold via fermentation (Poirier et al., Bio/Technology 13:
142 (1995)). Competitive synthetic plastics such as polypropylene and polyethylene cost about 35-45e71b (Layman, Chem. & Eng. News, p. 10 (Oct. 31, 1994). The annual global demand for polyethylene alone is about 37 million metric tons (Layman, Chem. & Eng.
News, p. 10 (Oct. 31, 1994). It is therefore likely that the cost of producing P(3HB-co-
3HV) by microbial fermentation will restrict its use to low-volume specialty applications. Polyhydroxyalkanoate (PHA) is a family of polymers composed primarily of R-3- hydroxyalkanoic acids (Anderson, A. J. & Dawes, E. A. Microbiol Rev. 54: 450-472. (1990); Steinbϋchel, A. in Novel Biomaterials from Biological Sources, ed. Byrom, D. (MacMillan, New York), pp. 123-213. (1991); Poirier, Y. Nawrath, C. & Somerville, C. Bio/Technology 13: 143-150 (1995)). Polyhydroxybutyrate (PHB) is the most well characterized PHA. High molecular weight PHB is found as intracellular inclusions in a wide variety of bacteria (Steinbϋchel, A. in Novel Biomaterials from Biological Sources, ed. Byrom, D. (MacMillan, New York), pp. 123-213. (1991)). In Alcaligenes eutrophus, PHB typically accumulates to 80% dry weight with inclusions being typically 0.2-1 μm in diameter. Small quantity of PHB oligomers of approximately 150 monomer units are also found associated with membranes of bacteria and eukaryotes, where they form channels permeable to calcium (Reusch, R. N., Can. J. Microbiol. 41 (Suppl. 1): 50-54 (1995)). High molecular weight PHAs have the properties of thermoplastics and elastomers. Numerous bacteria and fungi can hydrolyze PHAs to monomers and oligomers, which are metabolized as a carbon source. PHAs have, thus, attracted attention as a potential source of renewable and biodegradable plastics and elastomers. PHB is a highly crystalline polymer with rather poor physical properties, being relatively stiff and brittle (de Koning, G., Can. J. Microbiol. 41 (Suppl. 1): 303-309 (1995)). In contrast, PHA copolymers containing monomer units ranging from 3 to 5 carbons for short-chain-length PHA (SCL-PHA), or 6 to 14 carbons for medium-chain-length PHA (MCL-PHA), are less crystalline and more flexible polymers (de Koning, G., Can. J. Microbiol. 41 (Suppl. 1): 303-309 (1995)).
PHB has been produced in the plant Arabidopsis thaliana expressing the A. eutrophus PHB biosynthetic enzymes (Poirier, Y., et al., Science 256: 520-523 (1992);
Nawrath, C, et al., Proc. Natl. Acad. Sci. U.S.A. 91 : 12760-12764 (1994)). In plants expressing the PHB pathway in the plastids, leaves accumulated up to 14% PHB per gram dry weight (Nawrath, C, et al., Proc. Natl. Acad. Sci. U.S.A. 91 : 12760-12764 (1994)).
High-level synthesis of PHB in plants opened the possibility of utilizing agricultural crops as a suitable system for the production of PHAs on a large scale and at low cost (Poirier, Y. et al, Bio/Technology 13: 143-150 (1995); Poirier, Y., et al., FEMS Microbiol. Rev. 103: 237-246 (1992); Nawrath, C, et al. Molecular Breeding 1 : 105-22 (1995)). PHB was also shown to be synthesized in insect cells expressing a mutant fatty acid synthase (Williams, M. D., et al., Appl. Environ. Microbiol. 62: 2540-2546 (1996)), and in yeast expressing the A. eutrophus PHB synthase (Leaf, T. A., et al. Microbiol. 142: 1169-1180 (1996)).
A number of pseudomonads, including Pseudomonas putida and Pseudomonas aeruginosa, accumulate MCL-PHAs when cells are grown on alkanoic acids (Anderson, A. J. & Dawes, E. A. Microbiol. Rev. 54: 450-472. (1990); Steinbϋchel, A. in Novel Biomaterials from Biological Sources, ed. Byrom, D. (MacMillan, New York), pp. 123-213. (1991); Poirier, Y. Nawrath, C. & Somerville, C. Bio/Technology 13: 143-150 (1995)). The nature of the PHA produced is related to the substrate used for growth and is typically composed of monomers which are 2n carbons shorter than the substrate. These studies indicate that MCL-PHAs are synthesized by the PHA synthase from 3-hydroxyacyl-CoA intermediates generated by the β-oxidation of alkanoic acids (Huijberts, G. N. M., et al. Appl Environ. Microbiol. 58: 536-544 (1992); Huijberts, G. N. M., et al., J. Bacterial 176: 1661-1666 (1994)).
There exists a need for novel methods towards the biosynthesis of polyhydroxyalkanoate materials suitable for commercial applications. Towards this goal, this patent application discloses the materials and methods for the use of a peroxisome targeted polyhydroxyalkanoate synthase protein in the biosynthesis of polyhydroxyalkanoate polymers. Localization in the peroxisomes allow for the utilization of intermediates from the lipid β-oxidation pathway. Plants expressing a P. aeruginosa polyhydroxyalkanoate synthase modified for peroxisome targeting produce PHA containing saturated and unsaturated 3-hydroxyalkanoic acids ranging from 6 to 16 carbons. Polyhydroxyalkanoate granules are found within the glyoxysomes or leaf-type peroxisomes of dark-and light-grown plants, respectively, as well as in the vacuoles.
SUMMARY OF THE INVENTION
The invention is directed towards materials and methods for the biosynthesis of polyhydroxyalkanoate polymers. More particularly, a fusion protein comprising a polyhydroxyalkanoate synthase protein subunit and a peroxisome targeting protein subunit renders a host cell or plant capable of producing polyhydroxyalkanoate polymer materials.
In one embodiment, the invention provides a non-naturally ocurring fusion protein comprising a peroxisome targeting protein subunit and a polyhydroxyalkanoate synthase protein subunit. Generally, the peroxisome targeting protein subunit and the polyhydroxyalkanoate synthase protein subunit may be any subunit suitable for participation in the invention. The peroxisome targeting subunit may be an N-terminal or C-terminal subunit. The N-terminal subunit is preferably PTS2. The C-terminal peroxisome targeting subunit preferably comprises a tripeptide. The first amino acid in the N-terminus to C- terminus direction is preferably S, A, or P. The second amino acid in the N-terminus to C- terminus direction is preferably K, R, S, or H. The third amino acid in the N-terminus to C- terminus direction is L, M, I, or F. More preferably, the C-terminal peroxisome targeting subunit comprises ARM, SRM, SKL, ARL, SRL, PSI, or PRM. The peroxisome targeting subunit is preferably at least 70% identical to SEQ ID NO: 14, more preferably at least 80% identical to SEQ ID NO: 14, even more preferably at least 90% identical to SEQ ID NO: 14, and most preferably is SEQ ID NO: 14. The polyhydroxyalkanoate synthase protein subunit is preferably a Pseudomonas subunit, and more preferably a Pseudomonas aeruginosa subunit. The polyhydroxyalkanoate synthase protein subunit may preferably be either a PHAC1 or PHAC2 subunit. The PHAC1 subunit is preferably at least 70% identical to SEQ ID NO:2, more preferably at least 80% identical to SEQ ID NO:2, even more preferably at least 90% identical to SEQ ID NO:2, and most preferably is SEQ ID NO:2. The PHAC2 subunit is preferably at least 70% identical to SEQ ID NO:4, more preferably at least 80% identical to SEQ ID NO:4, even more preferably at least 90% identical to SEQ ID NO:4, and most preferably is SEQ ID NO:4. The fusion protein is preferably at least 70% identical to SEQ ID NO: 18 or SEQ ID NO:20, more preferably at least 80% identical to SEQ ID NO: 18 or SEQ ID NO:20, even more preferably at least 90% identical to SEQ ID NO: 18 or SEQ ID NO:20, and most preferably is SEQ ID NO: 18 or SEQ ID NO:20.
In an alternative embodiment, the invention encompasses a nucleic acid segment encoding a non-naturally occurring fusion protein. The nucleic acid segment preferably comprises a nucleic acid sequence encoding a peroxisome targeting protein subunit, and a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit. The nucleic acid sequence encoding a peroxisome targeting protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO: 13. The length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO: 13. The nucleic acid sequence encoding a peroxisome targeting protein subunit is preferably at least 70% identical to SEQ ID NO: 13, more preferably at least 80% identical to SEQ ID NO: 13, even more preferably at least 90% identical to SEQ ID NO: 13, and most preferably is SEQ ID NO: 13. The nucleic acid sequence encoding a peroxisome targeting protein subunit preferably hybridizes to SEQ ID NO: 13. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16. The length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is preferably at least 70% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, more preferably at least 80% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, even more preferably at least 90% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, further preferably is SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO:15, or SEQ ID NO:16, and most preferably is SEQ ID NO: 15 or SEQ ID NO: 16. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably hybridizes to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16. The encoded peroxisome targeting protein subunit may be an N- terminal or C-terminal peroxisome targeting protein subunit. The encoded N-terminal peroxisome targeting subunit is preferably PTS-2. The encoded C-terminal peroxisome targeting protein subunit preferably comprises a tripeptide. The tripeptide preferably comprises a first amino acid in the N-terminus to C-terminus direction being S, A, or P; a second amino acid in the N-terminus to C-terminus direction being K, R, S, or H; and a third amino acid in the N-terminus to C-terminus direction being L, M, I, or F. The encoded tripeptide preferably is ARM, SRM, SKL, ARL, SRL, PSI, or PRM. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes at least a 5 contiguous amino acid sequence from SEQ ID NO:2 or SEQ ID NO:4. The length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:2 or SEQ ID NO:4. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes an amino acid sequence at least 70% identical to SEQ ID NO:2 or SEQ ID NO:4, more preferably at least 80% identical to SEQ ID NO:2 or SEQ ID NO:4, even more preferably at least 90% identical to SEQ ID NO:2 or SEQ ID NO:4, and most preferably is SEQ ID NO:2 or SEQ ID NO:4.
In an alternative embodiment, the invention discloses a recombinant vector comprising in the 5' to 3' direction a) a promoter that directs transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the fusion protein comprises a peroxisome targeting protein subunit and a polyhydroxyalkanoate synthase protein subunit, b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the fusion protein comprises a peroxisome targeting protein subunit and a polyhydroxyalkanoate synthase protein subunit, and c) a 3' transcription terminator. The recombinant vector may further comprise a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of R A transcribed from the structural nucleic acid coding sequence. The recombinant vector may further comprise a selectable marker. The selectable marker may generally be any selectable marker suitable for the intended host cell or plant, and preferably is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker. The promoter may be constitutive, inducible, tissue specific, or combinations thereof. The constitutive promoter may generally any constitutive promoter suitable for the intended host cell or plant, and preferably is CaMV35S, enhanced CaMV35S, FMV, mas, nos, or ocs. The inducible promoter may generally be any inducible promoter suitable for the intended host cell or plant, and preferably is tac, salicylic acid induced, polyacrylic acid induced, safener induced, heat shock promoter, nitrate induced, hormone induced, or light induced. The tissue specific promoter may generally be any tissue specific promoter suitable for the intended host cell or plant, and preferably is the β-conglycinin 7S promoter, napin promoter, phaseolin promoter, zein promoter, soybean trypsin inhibitor promoter, ACP promoter, stearoyl-ACP desaturase promoter, or oleosin promoter. The nucleic acid sequence encoding a peroxisome targeting protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO: 13. The length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO: 13. The nucleic acid sequence encoding a peroxisome targeting protein subunit is preferably at least 70% identical to SEQ ID NO: 13, more preferably at least 80% identical to SEQ ID NO: 13, even more preferably at least 90% identical to SEQ ID NO: 13, and most preferably is SEQ ID NO: 13. The nucleic acid sequence encoding a peroxisome targeting protein subunit preferably hybridizes to SEQ ID NO: 13. The encoded peroxisome targeting protein subunit may be an N-terminal or C-terminal peroxisome targeting protein subunit. The encoded N-terminal peroxisome targeting subunit is preferably PTS-2. The encoded C- terminal peroxisome targeting protein subunit preferably comprises a tripeptide. The tripeptide preferably comprises a first amino acid in the N-terminus to C-terminus direction being S, A, or P; a second amino acid in the N-terminus to C-terminus direction being K, R, S, or H; and a third amino acid in the N-terminus to C-terminus direction being L, M, I, or F. The encoded tripeptide preferably is ARM, SRM, SKL, ARL, SRL, PSI, or PRM. The encoded polyhydroxyalkanoate synthase protein subunit is preferably a Pseudomonas subunit, and more preferably is a Pseudomonas aeruginosa subunit. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO:15, or SEQ ID NO:16. The length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is preferably at least 70% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, more preferably at least 80% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, even more preferably at least 90% identical to SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, further preferably is SEQ ID NO:l, SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16, and most preferably is SEQ ID NO: 15 or SEQ ID NO: 16. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably hybridizes to SEQ ID NO: l , SEQ ID NO:3, SEQ ID NO: 15, or SEQ ID NO: 16. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes at least a 5 contiguous amino acid sequence from SEQ ID NO:2 or SEQ ID NO:4. The length of the contiguous nucleic acid sequence may be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etcetera, 50, 51, 52, etcetera, 100, 101, 102, etcetera, up to and including the entire length of SEQ ID NO:2 or SEQ ID NO:4. The nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit preferably encodes an amino acid sequence at least 70% identical to SEQ ID NO:2 or SEQ ID NO:4, more preferably at least 80% identical to SEQ ID NO:2 or SEQ ID NO:4, even more preferably at least 90% identical to SEQ ID NO:2 or SEQ ID NO:4, and most preferably is SEQ ID NO:2 or SEQ ID NO:4. The structural nucleic acid sequence preferably comprises SEQ ID NO: 17 or SEQ ID NO: 19, and preferably encodes SEQ ID NO: 18 or SEQ ID NO:20.
In an alternative embodiment, the invention encompasses a recombinant host cell comprising a nucleic acid segment encoding a non-naturally occurring fusion protein, wherein the nucleic acid segment comprises a nucleic acid sequence encoding a peroxisome targeting protein subunit and a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit. The recombinant host cell may generally be any type of host cell, and preferably is a fungal or plant host cell. The fungal cell is generally any type of fungal cell, and preferably a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell. The plant cell is generally any type of plant cell, and preferably an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell. The recombinant host cell may further comprise a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase. A further alternative embodiment describes a genetically transformed plant cell comprising in the 5' to 3' direction: a) a promoter to direct transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) a 3' transcription terminator sequence; and d) a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of RNA transcribed from the structural nucleic acid coding sequence. The plant cell is generally any type of plant cell, and preferably an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell. The plant cell may further comprise a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase.
An additional embodiment describes a genetically transformed plant comprising in the 5' to 3' direction: a) a promoter to direct transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) a 3' transcription terminator sequence; and d) a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of RNA transcribed from the structural nucleic acid coding sequence. The plant may generally be any type of plant, and preferably an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant. The promoter may be constitutive, inducible, tissue specific, or combinations thereof. The constitutive promoter may generally any constitutive promoter suitable for the intended plant, and preferably is CaMV35S, enhanced CaMV35S, FMV, mas, nos, or ocs. The inducible promoter may generally be any inducible promoter suitable for the intended plant, and preferably is tac, salicylic acid induced, polyacrylic acid induced, safener induced, heat shock promoter, nitrate induced, hormone induced, or light induced. The tissue specific promoter is generally any tissue specific promoter, and preferably is the β-conglycinin 7S promoter, napin promoter, phaseolin promoter, zein promoter, soybean trypsin inhibitor promoter, ACP promoter, stearoyl-ACP desaturase promoter, or oleosin promoter. The plant may further comprise a nucleic acid segment encoding an acyl-ACP thioesterase, a fatty acyl hydroxylase, a yeast multifunctional protein (MFP), or an hydroxyacyl-CoA epimerase.
The invention describes a method for preparing host cells useful to produce a non- naturally occurring fusion protein comprising the steps of: a) selecting a host cell b) transforming the selected host cell with a recombinant vector having a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; and c) obtaining transformed host cells. The vector may further comprise a selectable marker. The selectable marker may generally be any selectable marker suitable for use in the intended host cell, and more preferably for plants is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker. The host cell may generally be any type of cell, and preferably is a fungal or plant cell. The fungal cell may generally be any type of fungal cell, and more preferably is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell. The plant cell may generally be any type of plant cell, and more preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
The invention further describes a method of preparing a transformed plant useful to produce a non-naturally occurring fusion protein comprising the steps of: a) selecting a host plant cell b) transforming the selected host cell with a recombinant vector having a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) obtaining transformed host plant cells; and d) regenerating the transformed host plant cells. The vector may further comprise a selectable marker. The selectable marker may generally be any selectable marker suitable for use in the intended host cell, and more preferably is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker. The host plant cell may generally be any type of plant cell, and more preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell. The invention also encompasses the plant made by the above described methods.
A preferred embodiment is a method for the preparation of a polyhydroxyalkanoate, comprising the steps of: a) obtaining a cell capable of producing a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; b) establishing a culture of the cell; and c) culturing the cell under conditions suitable for the production of the polyester. The method may further comprise isolating the polyhydroxyalkanoate from the cultured cell. The culture may further comprise fatty acids, and more preferably natural fatty acids, non-natural or synthetic fatty acids, or mixtures thereof. The cell may generally be any type of cell, and preferably is a fungal or plant cell. The fungal cell may generally be any type of fungal cell, and more preferably is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell. The plant cell may generally be any type of plant cell, and more preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell. The polyhydroxyalkanoate isolated from the cell may generally be any type of polyhydroxyalkanoate, and preferably comprises 3-hydroxyhexanoic acid (H:6), 3- hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3-hydroxyhexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3 -hydroxy nonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3-hydroxyhexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2), 3 -hydroxy hexadecenoic acid (H16:l), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3- hydroxytetradecenoic acid (H14:l), 3-hydroxydodecadienoic acid (H12:2), 3- hydroxydodecenoic acid (H12:l), 3-hydroxyoctenoic acid (H8:l), 4-hydroxydecanoic acid, 8-methyl-3-hydroxynonanoic acid, or 6-methy 1-3 -hydroxyheptanoic acid monomers.
In a further preferred embodiment, the invention presents a method for the preparation of a polyhydroxyalkanoate, comprising the steps of: a) obtaining a plant capable of producing a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; and c) growing the plant under conditions suitable for the production of the polyhydroxyalkanoate. The method may further comprise the step of isolating the polyhydroxyalkanoate from the plant. The method may further comprise supplementing the plant with natural fatty acids, non-natural fatty acids, or mixtures thereof. The plant may generally be any type of plant, and preferably is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant. The polyhydroxyalkanoate isolated from the plant may generally be any type of polyhydroxyalkanoate, and preferably comprises 3-hydroxyhexanoic acid (H:6), 3- hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3-hydroxydodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3-hydroxyhexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3-hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3-hydroxyhexadecatrienoic acid (HI 6:3), 3- hydroxyhexadecadienoic acid (HI 6:2), 3-hydroxyhexadecenoic acid (HI 6:1), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3- hydroxytetradecenoic acid (H14:l), 3 -hydroxy dodecadienoic acid (H12:2), 3- hydroxydodecenoic acid (H12:l), 3-hydroxyoctenoic acid (H8:l), 4-hydroxydecanoic acid, 8-methyl-3-hydroxynonanoic acid, or 6-methyl-3 -hydroxyheptanoic acid monomers.
The invention further encompasses plants containing polyhydroxyalkanoates, wherein the polyhydroxyalkanoate comprises 3-hydroxyhexanoic acid (H:6), 3- hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3-hydroxyhexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3-hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3 -hydroxy hexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2), 3-hydroxyhexadecenoic acid (H16:l), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3- hydroxytetradecenoic acid (H14:l), 3 -hydroxy dodecadienoic acid (H12:2), 3- hydroxydodecenoic acid (H12:l), 3-hydroxyoctenoic acid (H8:l), 4-hydroxydecanoic acid, 8-methyl-3-hydroxynonanoic acid, or 6-methy 1-3 -hydroxyheptanoic acid monomers.
In an alternative embodiment, the invention describes polyhydroxyalkanoates comprising 3 -hydroxy hexadecatrienoic acid (HI 6:3), 3 -hydroxy hexadecadienoic acid (H16:2), 3-hydroxytetradecatrienoic acid (H14:3), or 3-hydroxydodecadienoic acid (H12:2) monomers.
DESCRIPTION OF THE FIGURES
The following figure forms part of the present specification and is included to further demonstrate certain aspects of the present invention. The invention may be better understood by reference to the figure in combination with the detailed description of specific embodiments presented herein.
Figure 1 : GC-MS analysis of PHA in transgenic plants. Trans-esterified chloroform extracts from phaC 1 -transformed line 3.3 (1 A. IB) and vector-transformed line 21 (IC, ID) were analyzed. In panels 1A and IC, the total ion chromatogram is presented, while on panel IB and ID, only ions with a mass-to-charge ratio of 103 are shown.
DESCRIPTION OF THE SEQUENCE LISTINGS
The following sequence listings form part of the present specification and are included to further demonstrate certain aspects of the present invention. The invention may be better understood by reference to one or more of these sequence listings in combination with the detailed description of specific embodiments presented herein.
SEQ ID NO: 1 Wild type PHA synthase C 1 nucleic acid sequence.
SEQ ID NO:2 Wild type PHA synthase CI protein sequence.
SEQ ID NO:3 Wild type PHA synthase C2 nucleic acid sequence, SEQ ID NO:4 Wild type PHA synthase C2 protein sequence.
SEQ ID NO:5 Forward PCR primer for PHA synthase CI fusion sequence.
SEQ ID NO:6 Reverse PCR primer for PHA synthase CI fusion sequence.
SEQ ID NO:7 Forward PCR primer for PHA synthase C2 fusion sequence.
SEQ ID NO: 8 Reverse PCR primer for PHA synthase C2 fusion sequence. SEQ ID NO:9 Wild type isocitrate lyase nucleic acid sequence.
SEQ ID NO: 10 Wild type isocitrate lyase protein sequence.
SEQ ID NO: 11 Forward PCR primer for isocitrate lyase fusion sequence.
SEQ ID NO: 12 Reverse PCR primer for isocitrate lyase fusion sequence.
SEQ ID NO: 13 Nucleic acid sequence encoding the isocitrate lyase peroxisome targeting protein subunit.
SEQ ID NO: 14 Isocitrate lyase peroxisome targeting protein subunit.
SEQ ID NO: 15 PHA synthase CI nucleic acid sequence with plant preferred codon. SEQ ID NO: 16 PHA synthase C2 nucleic acid sequence with plant preferred codon. SEQ ID NO: 17 Nucleic acid sequence encoding PHA synthase CI and isocitrate lyase fusion protein. SEQ ID NO: 18 PHA synthase CI and isocitrate lyase fusion protein.
SEQ ID NO: 19 Nucleic acid sequence encoding PHA synthase C2 and isocitrate lyase fusion protein. SEQ ID NO:20 PHA synthase C2 and isocitrate lyase fusion protein.
SEQ ID NO:21 PCR amplified nucleic acid sequence encoding wild type Candida albicans MFP.
SEQ ID NO:22 Wild type Candida albicans MFP protein.
SEQ ID NO:23 PCR amplified nucleic acid sequence encoding SKL mutant
Candida albicans MFP. SEQ ID NO:24 Candida albicans MFP protein with SKL substitution for AKI.
SEQ ID NO:25 PCR amplified nucleic acid sequence encoding mutant
Candida albicans MFP lacking AKI sequence. SEQ ID NO:26 Candida albicans MFP protein lacking AKI sequence.
DEFINITIONS
The following definitions are provided in order to aid those skilled in the art in understanding the detailed description of the present invention.
"Acyl-ACP thioesterase" refers to proteins which catalyze the hydrolysis of acyl- ACP thioesters.
"C-terminal region" refers to the region of a peptide, polypeptide, or protein chain from the middle thereof to the end that carries the amino acid having a free a carboxyl group (the C-terminus). "CoA" refers to coenzyme A.
The phrases "coding sequence", "open reading frame", and "structural sequence" refer to the region of continuous sequential nucleic acid triplets encoding a protein, polypeptide, or peptide sequence.
The term "encoding DNA" or "encoding nucleic acid" refers to chromosomal nucleic acid, plasmid nucleic acid, cDNA, or synthetic nucleic acid which codes on expression for any of the proteins or fusion proteins discussed herein.
"Fatty acyl hydroxylase" refers to proteins which catalyze the conversion of fatty acids to hydroxylated fatty acids.
The term "gene" refers to chromosomal DNA, plasmid DNA, cDNA, synthetic
DNA, or other DNA that encodes a peptide, polypeptide, protein, or RNA molecule, and regions flanking the coding sequence involved in the regulation of expression.
The term "genome" as it applies to bacteria encompasses both the chromosome and plasmids within a bacterial host cell. Encoding DNAs of the present invention introduced into bacterial host cells can therefore be either chromosomally-integrated or plasmid- localized. The term "genome" as it applies to plant cells encompasses not only chromosomal DNA found within the nucleus, but organelle DNA found within subcellular components of the cell. DNAs of the present invention introduced into plant cells can therefore be either chromosomally-integrated or organelle-localized.
"Glyoxysome" and "peroxisome" refer to the same organelle in a plant.
Glyoxysome refers to a type of peroxisome found in germinating seedlings, senescing tissues, or in dark-grown tissues. Glyoxysomes and peroxisomes contain enzymes responsible for the conversion of lipids to carbohydrates.
"Identity" refers to the degree of similarity between two nucleic acid or protein sequences. An alignment of the two sequences is performed by a suitable computer program. A widely used and accepted computer program for performing sequence alignments is CLUSTALW vl .6 (Thompson, et al. Nucl. Acids Res., 22: 4673-4680 (1994)). The number of matching bases or amino acids is divided by the total number of bases or amino acids, and multiplied by 100 to obtain a percent identity. For example, if two 580 base pair sequences had 145 matched bases, they would be 25 percent identical. If the two compared sequences are of different lengths, the number of matches is divided by the shorter of the two lengths. For example, if there were 100 matched amino acids between 200 and a 400 amino acid proteins, they are 50 percent identical with respect to the shorter sequence. The terms "microbe" or "microorganism" refer to algae, bacteria, fungi, and protozoa.
"N-terminal region" refers to the region of a peptide, polypeptide, or protein chain from the amino acid having a free a amino group to the middle of the chain.
"Nucleic acid" refers to ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).
A "nucleic acid segment" is a nucleic acid molecule that has been isolated free of total genomic DNA of a particular species, or that has been synthesized. Included with the term "nucleic acid segment" are DNA segments, recombinant vectors, plasmids, cosmids, phagemids, phage, viruses, etcetera.
"Overexpression" refers to the expression of a polypeptide or protein encoded by a DNA introduced into a host cell, wherein said polypeptide or protein is either not normally present in the host cell, or wherein said polypeptide or protein is present in said host cell at a higher level than that normally expressed from the endogenous gene encoding said polypeptide or protein.
The term "plastid" refers to the class of plant cell organelles that includes amyloplasts, chloroplasts, chromoplasts, elaioplasts, eoplasts, etioplasts, leucoplasts, and proplastids. These organelles are self-replicating, and contain what is commonly referred to as the "chloroplast genome," a circular DNA molecule that ranges in size from about 120 to about 217 kb, depending upon the plant species, and which usually contains an inverted repeat region (Fosket, Plant growth and Development, Academic Press, Inc., San Diego, CA, p. 132 (1994)).
"Polyadenylation signal" or "polyA signal" refers to a nucleic acid sequence located
3' to a coding region that directs the addition of adenylate nucleotides to the 3' end of the mRNA transcribed from the coding region.
The term "polyhydroxyalkanoate (or PHA) synthase" refers to enzymes that convert hydroxyacyl-CoAs to polyhydroxyalkanoates and free CoA.
The term "promoter" or "promoter region" refers to a nucleic acid sequence, usually found upstream (5') to a coding sequence, that controls expression of the coding sequence by controlling production of messenger RNA (mRNA) by providing the recognition site for RNA polymerase and/or other factors necessary for start of transcription at the correct site. As contemplated herein, a promoter or promoter region includes variations of promoters derived by means of Hgation to various regulatory sequences, random or controlled mutagenesis, and addition or duplication of enhancer sequences. The promoter region disclosed herein, and biologically functional equivalents thereof, are responsible for driving the transcription of coding sequences under their control when introduced into a host as part of a suitable recombinant vector, as demonstrated by its ability to produce mRNA.
"Protein subunit" refers to a protein sequence that is part of a fusion protein.
Examples are β-galactosidase, FLAG, green fluorescent protein, and in the instant invention, polyhydroxyalkanoate synthase, and a peroxisome or glyoxysome targetting peptide.
"PTS2" refers to an N-terminal protein subunit having the sequence (R/K)(L/Q/I)XXXXX(H/Q)L, wherein X is any amino acid. "Regeneration" refers to the process of growing a plant from a plant cell (e.g., plant protoplast or explant).
"Transformation" refers to a process of introducing an exogenous nucleic acid sequence (e.g., a vector, recombinant nucleic acid molecule) into a cell or protoplast in which that exogenous nucleic acid is incorporated into a chromosome or is capable of autonomous replication.
A "transformed cell" or "transgenic cell" is a cell whose DNA has been altered by the introduction of an exogenous nucleic acid molecule into that cell.
A "transformed plant" or "transgenic plant" is a plant whose DNA has been altered by the introduction of an exogenous nucleic acid molecule into that plant, or by the introduction of an exogenous nucleic acid molecule into a plant cell from which the plant was regenerated or derived.
The following examples are included to demonstrate preferred embodiments of the invention. It should be appreciated by those of skill in the art that the techniques disclosed in the examples which follow represent techniques discovered by the inventors to function well in the practice of the invention, and thus can be considered to constitute preferred modes for its practice. However, those of skill in the art should, in light of the present disclosure, appreciate that many changes can be made in the specific embodiments which are disclosed and still obtain a like or similar result without departing from the spirit and scope of the invention.
EXAMPLES
EXAMPLE 1 : Plant material
Arabidopsis thaliana, race Columbia, was transformed by the vacuum infiltration method (Bechtold, N., et al., C.R. Acad. Sci. Paris 316: 1194-1199 (1993)). Transformants were selected on media containing Murashige and Skoog salts ("MS", Murashige, T. and Skoog, F., Physiol Plant. 15: 473-497 (1962)), 1% (w/v) sucrose, 0.7% (w/v) agar and 50 μg/mL kanamycin. Kanamycin-resistant plants were subsequently transferred to soil and grown under continuous fluorescent light at 19°C. In some experiments, plants were grown under constant agitation (100 rpm) for 1-2 weeks in liquid media containing MS salts and 2% sucrose.
EXAMPLE 2: Cloning of peroxisomally targeted PHA synthases CI and C2
The phaCl and phaC2 genes were obtained from Steinbϋchel (Timm, A. and Steinbϋchel, A., Eur. J. Biochem. 209: 14-30 (1992), GenBank Accession Number X66592). PCR was used to amplify the genes and to modify their 5'- and 3'-termini as follows: At the 5 '-end the codons encoding the serine-2 and the arginine-2 residue of phaCl and phaC2, respectively, were modified to conform more closely with the general codon preferences of A. thaliana (Meyerowitz, E. M. in Methods in Arabidopsis research , eds. Koncz, C, Chua, N.-H. & Schell, J. (World Scientific Publishing, Singapore), pp. 100- 119 (1992)). At the 3 '-end the sequences were modified to obtain suitable cloning sites and to delete the stop codons to enable the construction of chimerical fusions with the peroxisomal targeting sequence.
The carboxy-terminal 35 amino acid residues of the isocitrate lyase gene (ICL) (Olsen, L.J., et al., Plant Cell 5: 941-952 (1993), GenBank Accession Number Y13356) from Brassica napus were used as targeting sequence for the PHA synthases CI and C2. It has been shown previously that this sequence was sufficient to ensure the peroxisomal localization of the chloramphenicol acetyl transferase (CAT) to the peroxisomes in A. thaliana (Comai, L. et al., 77*e Plant Cell 1: 293-300 (1989); Olsen, L. J. et al., The Plant Cell 5: 941-952 (1993); Zhang, J. Z. et al., Mol Gen. Genet. 238: 177-184 (1993)). A PCR product encoding the ICL targeting sequence was cloned into the vector pART7 (Gleaves, A.P., Plant Mol. Biol. 20: 1202-1207 (1992), GenBank Accession Number X69707). The PCR products containing the phaCl or phaC '2 genes were cloned 5 '-upstream of the ICL sequence to produce a contiguous open reading frame encoding the targeted fusion proteins. The 5'- and 3'-ends of the genes in the resulting plasmids pART7_phaCl_ICL and pART7_phaC2_ICL were sequenced to verify the modifications.
The PHA accumulation-deficient mutant Pseudomonas putida KT2440 NK2:3 was obtained from Steinbϋchel for complementation studies to verify the enzyme activities of the modified PHA synthases CI and C2. The phaCI ICL and phaC2_ICL genes were cloned into the broad-host range plasmid pVLT35 behind the IPTG-inducible tac -promoter (Lorenzo, V. et al., Gene 123: 17-24 (1993)) and electroporated into the P. putida mutant. Streptomycin-resistant transformants were subcultured onto minimal medium containing either octanoate or gluconate as sole carbon source. The Nile Blue A fluorescence stain (Page, W. J. and C. J. Tenove, Biotechnology Techniques 10: 215-220 (1996)) was used to visualize PHA accumulation. Upon IPTG induction PHA accumulation was observed with pVLT35_phaCl_ICL and pVLT35_phaC2_ICL, but not with pVLT35 alone, thus indicating that the modified genes were still active.
EXAMPLE 3: Plant transformation and screening for PHA synthase CI transgenic plants
The Notl-cassettes of plasmids pART7_phaCl_ICL and pART7_phaC2_ICL containing the modified genes flanked by the Cauliflower mosaic virus 35S promoter (CaMV35S) and the octapine synthase (ocs) 3 '-terminator were cloned into the plant binary vector pART27 to obtain pART27_phaCl_ICL and pART27_phaC2_ICL. These plasmids were transformed into A. thaliana ecotype Columbia by Agrobacterium GV3101 -mediated transfer utilizing an in planta vacuum-infiltration method (Bechtold, N. et al., C.R. Acad. Sci. Paris 316: 1194-1199 (1993)). Transgenic Tl plants were selected for antibiotic resistance during germination of the seeds of infiltrated plants on plant growth medium containing mineral salts, sucrose and kanamycin. Negative control plants containing only the insert-less T-DNA of the vector pART27 were obtained in the same way.
Transgenic PHAC1 plants (Tl) expressing high amounts of PHA synthase CI were selected by Western analysis with an antiserum against the PHA synthase CI, which was obtained from Steinbϋchel's laboratory. Unfortunately no antibodies against PHA synthase C2 were found to be suitable, so a different screening strategy was used, see below. Six independent lines expressing varying quantities of PHA synthase CI were obtained from 12 originally infiltrated plants, which had been harvested individually (another 19 have not yet been investigated). Initially some problems with the western analysis were encountered, one of which was the precipitation of the PHA synthase in plant protein extracts upon freezing. Analysis of the kanamycin segregation of the second generation (T2) and third generation (T3) plants indicated that three of these lines contained multilocus T-DNA inserts. Initially these lines exhibited the highest expression of PHA synthase CI as judged by western analysis, however, the expression of the transgene in these lines was variable in plants of the T2 and T3 generation and complete "silencing" was observed. The line PHAC1#3.3 was finally chosen for further studies, because it contained a single-locus T- DNA insert and exhibited stable expression of the transgene as seen on the western blot.
EXAMPLE 4: PHA production by PHAC1 plants
A protocol for the detection of monomers of PHA by gas chromatography was developed based on the method described for the extraction of PHB from Arabidopsis (Poirier, Y. et al., Int. J. Biol. Macromol 17: 7-12 (1995)). Whole leaves were extracted several times with ethanol and methanol to elute all the soluble lipids, thereafter chloroform and methanol acidified with 3% (v/v) H2SO4 were added in equal volumes and the reactions were put at 98°C for 4 hours to transesterify the PHA polyester. GC-chromatograms of the resulting chloroform extracts showed a large number of peaks, most of which were due to the derivatization of various leave compounds. Peaks corresponding to the standards of the expected methyl esters of PHA monomers were, however, distinguishable amongst the others. A large fraction of the plant material was solubilized during this transesterification treatment, it was however not determined whether underivatized PHA remained in the solid underivatized material. This made the quantification of the PHA in plant material slightly uncertain, but the authors estimated intuitively that most of the PHA in the material became derivatized preferentially. The GC-standards (from Sigma Chemical, St. Louis, MO, except H6 which was from Beat Keller) were the methyl esters of D-3-hydroxy-hexanoic acid (3- OH-caproic acid, H6 monomer), DL-3-hydroxy-octanoic acid (3-OH-caprylic acid. H8 monomer), DL-3-hydroxy-capric acid (H10 monomer), DL-3-hydroxy-lauric acid (HI 2 monomer) and DL-3-hydroxy-myristic acid (HI 4 monomer).
The transgenic plants expressing the PHA synthase CI showed a significant increase in the size of the peaks corresponding to the H6-H14 monomers compared to the negative control plants. One novel peak was found only in PHAC1 plants and never in the negative controls. GC-MS was used to confirm that the peaks observed in both the PHAC1 plants and the negative controls were really identical to the standards and the novel peak was determined as being due to 3-hydroxy-octenoyl-methyl-ester containing a single unsaturated bond (H8:l monomer). It is being speculated that the unsaturated bond is located at carbon 5 and has the cis conformation and that this monomer is due to the degradation of α- linolenic acid (18:3, all-cis, Δ9,12,15) and 16:3 (all-cis, Δ7, 10, 13) by β-oxidation. This reasoning is based on the prediction, that a D-3-hydroxy-octenoyl-CoA β-oxidation intermediate arises due to the cis-double bond at the even-numbered carbons (Gerhardt, B., Lipid metabolism in plants (Moore, T. S., Jr., ed.), CRC Press Inc., pp. 527-565 (1993)); see further discussions below under feeding studies). The same argument can be taken for the generation of the other monomers incorporated into the PHA, i.e. that they originated from fatty acids having a double bond at even-numbered carbons, which resulted in the formation of D-3-hydroxy-acyl-CoA β-oxidation intermediates. Thus the H8 monomer would originate from the degradation of linoleic acid (C18:2, all-cis, Δ9,12) or from C16:2, all-cis, Δ7, 10. This however does not satisfactorily explain the whole range of monomers observed, e.g. the H6 monomer would then have to originate from the fatty acids C18:l, Δ14-cis or C16:l, Δ12-cis, while the H14 monomer would have to originate from C18:l, Δ8-cis, or C16:l, Δ4-cis or C14:l, Δ2-cis, etcetera. As most of these would be rather uncommon fatty acids in A. thaliana, another argument for the origin of these PHA monomers can be proposed, which is based on the existence of an epimerase activity in plant β-oxidation (Preisig-Mϋller, R. et al., J. Biol. Chem. 269: 20475-20481 (1994)). In this case the D-3-OH-acyl-CoA β-oxidation intermediates are generated at a low rate by the "reverse" reaction catalyzed by the epimerase required for the conversion of D-3-hydroxy- acyl-CoA to the L-form, and sequestration of these D-intermediates into PHA actually drives the reverse reaction. In this way the whole range of possible monomers can be explained, while the argument involving the unsaturated bond at even-numbered carbons in the acyl chains would still explain the relatively higher proportion of the H8-monomer and the existence of the H8:l monomer.
Several negative control plants (both A. thaliana wild type and pART27 transgenic plants) were analyzed in various experiments without ever seeing more than only trace amounts of the various saturated monomers. The concentrations present in the negative controls were at least 1000 times smaller than in the positive plants, close to the detection limit of the methods at our availability. This was done by utilizing the GC-MS in the SIM mode (selected ion monitoring; ion 103 is characteristic for all of these 3-OH-fatty acid methyl esters) for which the detection limit was found to be approximately 4 pg/μL of the various standards. These compounds in the negative controls might also be intermediates of β-oxidation, i.e. mostly the L-3-hydroxy-acyl-CoAs and perhaps even very low amounts of the D-form, which are normally present at very low concentrations in the plant material in which β-oxidation is taking place. A rough calculation indicated a total PHA content of 0.03% (w/dry weight) in PHAC1#4.4 (multilocus plant), which related to approximately 5 μg of PHA in a large fresh leave weighing 155 mg. It was approximated that line PHAC1#3.3 produced 0.01% (weight/dry weight) in soil-grown plants.
EXAMPLE 5: Screening for PHA synthase C2 expressing plants
PHAC2 plants were screened directly for PHA production by analysis of dry leaves of T2 plants. Almost all of the T2 plants derived from 13 independently transformed plants were found to produce PHA in varying quantities, as judged by the presence of the novel peak due to the C8:l monomer and also the peaks of the other PHA monomers. The highest producing plants were analyzed further and homozygous T3 plants were obtained. Two homozygous single-locus T3 lines were selected, PHAC2#19.5 and PHAC2#8.6. In comparison to PHAC1#3.3 plants, these PHAC2 plants produced slightly smaller quantities of PHA in seedlings grown on plates containing MS salts, kanamycin and sucrose. The monomer composition of the respective transgenic plants was however identical. For that reason most of the further studies were only done with line PHACl #3.3.
EXAMPLE 6: Immunolocalization and observation of PHA granules
For the immunolocalization of the peroxisomally-targeted PHA synthase C 1 , T3 seedlings of lines PHAC1#3.3 and pART27#21 (negative control) were grown on plates containing MS salts, kanamycin and sucrose. Seedlings were grown for 7 days under continuous light or in the dark after one day of illumination, the latter was done to obtain etiolated seedlings in which glyoxysomes are more abundant. The seedlings were fixed and sent together with some anti-PHA synthase CI antiserum to Prof. Leech's laboratory at the University of York, where the immunolocalization was performed. It was found that the peroxisomes in PHAC 1 seedlings were initially difficult to identify, since they did not look normal due to the presence of granules within them. These granules were very abundant in the etiolated seedlings, while in the light-grown seedlings most of the peroxisomes still looked normal or seemed to contain only tiny granules. The PHA synthase CI was located in what seem to be two different types of organelles or peroxisomes, because the one contains a large quantity of PHA granules while the other contains apparently none. The darker peroxisomes without granules corresponded in appearance most closely to the normal peroxisomes in the negative controls. It is possible that this apparent heterogeneity is simply the results of non-homogenous distribution of granules within the peroxisomes. Glycolate oxidase was used as marker enzyme for peroxisomes of seedlings grown under light, while rubisco was used as chloroplastic marker. Antibodies against these two marker enzymes clearly identified the respective organelles in both PHACl seedlings and in the pART27 negative controls. Glycolate oxidase was found to be located in the organelles, i.e. the peroxisomes, containing PHA granules. Similarly the enzyme isocitrate lyase (ICL) was used as glyoxysomal marker in etiolated seedlings and it also confirmed that the granule- containing organelles were glyoxysomes. The antiserum against PHA synthase CI unambiguously identified the peroxisomal localization of the PHA synthase in the PHAC 1 seedlings, while it did not detect anything in the negative controls. Unusual accumulations of granules were also observed occasionally in the vacuoles of etiolated PHACl seedlings and these globules were gold-labelled with anti-PHA synthase CI . This was in correspondence with the observation that the PHB synthase is found on the surface of PHB granules in bacteria (Gerngross, T. U. et al., J. Bacteriol 175, 5289-5293 (1993)).
EXAMPLE 7: Changing PHA yield and monomer composition in feeding studies
Line PHACl #3.3 was used to investigated if the total yield of PHA could be increased or if PHAs containing other monomers than the "native" PHA could be synthesized in PHACl transgenic plants. For that purpose seeds were sterilized and germinated in liquid medium containing mineral salts and 2% (w/v) sucrose supplemented with fatty acids or other compounds known to be degraded by β-oxidation. In experiment #1 the seedlings were grown for 3 days in the light before the substrates were added and the plant were moved into the dark. The material was harvested after 8 days and derivatized samples were analyzed by gas chromatography.
The results summarized in Table 1 point out several encouraging aspects. The yield of native PHA (obtained without feeding any substrate) was doubled when seedlings were germinated in the dark as opposed to continuous illumination. This could perhaps be ascribed to a more complete mobilization of the seed lipids in etiolated seedlings. In this respect the regulation of the glyoxylate cycle enzymes malate synthase and isocitrate lyase might play a role by affecting lipid-mobilization via β-oxidation. It has been shown that these glyoxylate cycle enzymes are regulated transcriptionally by three types of signal, namely light regulation, carbon catabolite repression by various sugars and developmental regulation during germination and senescence (Graham, I. A. et al., Plant Mol. Biol. 15: 539-549 (1990); Graham, I. A. et al., Plant Cell 4:349-357 (1992); Graham, I. A. et al., Plant Cell 6: 761-772 (1994)).
The large increase in the PHA yield obtained by the feeding of TWEEN-20 (Sigma; 50% palmitic acid (C16) esterified with polyoxyethylenesorbitol, the remainder is made up by lauric acid (C12) and myristic acid (C14) also esterified) (TWEEN is a registered trademark of ICI Americas, Inc., Wilmington, DE) indicated that the PHA synthase was very active in these plants and thus not responsible for the relatively low yield of native PHA in seedlings grown without added fatty acids. The most pronounced effect of TWEEN- 20 on the monomer composition was the decrease in the content of the H8:l monomer from about 30% in native PHA to about 1%, which was most likely due to the lack of unsaturated fatty acid derivatives in the TWEEN-20. The relative distribution of the other monomers could be explained by the step-by-step β-oxidation of the C16, C14 and C12 components in TWEEN-20. A negative effect on seedling growth due to TWEEN-20 was observed, but it was small considering its high concentration (5% v/v) in the medium.
The accumulation of PHA granules in PHAC 1 seedlings grown in liquid cultures supplemented with 5% TWEEN-20 under constant illumination for 12 days was very striking on electron microscope micrographs. These PHA granules were not observed in the negative controls, i.e. pART27 transgenic seedlings fed with TWEEN-20. The granules looked different from the starch granules observed in chloroplasts. These electron microscopic studies were done in our own institute by Mrs J. Petetot and the results confirmed similar results obtained with etiolated seedlings in Prof. Leech's laboratory.
TWEEN-60 (Sigma; 50% stearic acid (C18) and some palmitic and myristic acid; all esterified to polyoxyethylenesorbitol) and TWEEN-80 (Sigma; 50% oleic acid (C18:l), esterified to polyoxyethylenesorbitol) had less impact on the PHA yield, the monomer composition and the seedling growth than TWEEN-20. The relatively high level of the H8:l monomer might be due to a higher contamination of TWEEN-60 and -80 with unsaturated fatty acids like α-linolenic acid, see above.
The free fatty acids hexanoate and octanoate were fed at very low concentrations due to their toxic effects on plant growth. For hexanoate a large increase of the H6 monomer was observed, while octanoate resulted in a very high increase of the H8 monomer together with a moderate increase in the H6 monomer. For both substrates the H8:l monomer content remained relatively high, which was probably due to the normal accumulation of PHA from endogenous lipid β-oxidation ("native" PHA). Table 1. Increasing the total yield of PHA and changing its monomer composition in PHACl seedlings germinated in liquid media supplemented with fatty acids
Figure imgf000030_0001
a The transesterified plant material (of specified weight) was in a volume of 1 mL chloroform, of which 1 μL was analyzed by GC.
An average of 30 seedlings were grown per sample. c Samples were done in duplicate and the results were averaged.
In experiment #2 (Tables 2 and 3) the seedlings were germinated for 8 days under continuous illumination, then the growth medium was replaced by the same medium containing 5% (v/v) TWEEN-80 together with various fatty acids, the purpose of the TWEEN-80 was to solubilize the water-insoluble fatty acids. The samples were placed back under constant illumination for another 6 days before being harvested and analysed. All samples were done in duplicate and each sample contained approximately 45 seeds which were germinated together in a large capped test-tube. Negative controls with pART27 plants were done for each substrate in the identical fashion. None of the novel PHA-monomer peaks were found in these negative controls.
Feeding of the saturated fatty acid tridecanoic acid (C13) and the branched fatty acid
8-methyl-nonanoic acid (8M-C9) resulted in the incorporation of a whole range of novel monomers. The identity of all these novel monomers was established by GC-MS. All of them had an uneven number of carbon atoms in their acyl chains and could be directly traced to the original fatty acid supplied in the medium or intermediates of its degradation by β-oxidation. For tridecanoic acid, transgenic PHACl plants were found to contain a polymer having HI 3-, HI 1-, H9- and H7-3-hydroxy-alkanoic acid monomers. In the case of 8M-C9 the two novel monomers, 8-methyl-3-D-hydroxy-nonanoic acid (8M-H9) and 6- methyl-3-D-hydroxy-heptanoic acid (6M-H7), retained the branched structure of the original substrate. This shows that the PHA synthase CI was able to incorporate a large variety of monomers into the polymer, provided that intermediates having the proper conformation were generated. The descending order in terms of quantities of the novel monomers (H13>H11>H9>H7; and 8M-H9>6M-H7) suggests that the β-oxidation of these unusual fatty acids proceeds slowly, thus permitting more time for intermediate-sequestration by the PHA synthase. It is possible that the 3-hydroxy-acyl-CoA dehydrogenase (MFP) and some other enzymes of the β-oxidation cycle have a low substrate specificity for these fatty acids and their derived intermediates.
Feeding of petroselenic acid (C18:l, 6-cis) resulted in a large increase in the content of the H14 monomer. This observation was in agreement with the proposed scheme of its degradation by β-oxidation (Gerhardt, B., Lipid metabolism in plants (Moore, T. S., Jr., ed.), CRC Press Inc., pp. 527-565 (1993)). All unsaturated bonds in the cis-conformation starting at an even-numbered carbon in the acyl chain were proposed to present obstacles to the normal cycle of the β-oxidation and had to be circumvented by modifications of the pathway. This is because the D-3-hydroxy-acyl-CoA can be formed by the action of the enoyl-CoA hydratase (MFP) from 2-cis-enoyl-CoA (cis-unsaturated bond in even-numbered position), but the D-3-hydroxy-acyl-CoA cannot be utilized by the 3-hydroxy-acyl-CoA dehydrogenase (MFP), which can only act on the L-3-hydroxy-acyl-CoA. Three possible modifications were put forward: 1) An epimerase converts the D-3-hydroxy-acyl-CoA to the L-form. 2) A dehydratase (also called D-3-hydroxyacyl-CoA hydrolyase or D-specific 2- trans-enoyl-CoA hydratase II, see Engeland, K. and Kindl, H., EMr. J. Biochem. 200: 171- 178 (1991)) converts the D-3-hydroxy-acyl-CoA to 2-trans-enoyl-CoA, which can then be reconverted to L-3-hydroxy-acyl-CoA by the enoyl-CoA hydratase I. 3) A 2,4-dienoyl- CoA reductase reduces the 2-trans-4-cis-acyl-CoA β-oxidation intermediate to the 3-cis- enoyl-CoA, which in turn will require the activity of an isomerase to form the 2-trans-enoyl- CoA β-oxidation intermediate. The first two options would result in the generation of D-3- hydroxy-acyl-CoA intermediates which would be directly available to the PHA synthase. Thus the observation of the specific increase in the H14 monomer upon feeding with petroselenic acid fits well with the predicted modifications of the β-oxidation to bypass the cis-unsaturated bond at carbon 6 of petroselenic acid. The same modifications have also been used above to explain the presence of the 3-hydroxy-octenoyl monomer (H8:l) in the native PHA. It was speculated that this monomer was due to the degradation of 18:3, all- cis-Δ9, 12, 15 and 16:3, all-cis-Δ7, 10, 13 by β-oxidation. The high proportion of H8 monomer could similarly be due to the degradation of linoleic acid (18:2, all-cis-Δ9,12) which is an abundant fatty acid in plant material.
The degradation of fatty acids containing hydroxy groups on even-numbered carbon atoms in either the D- or the L-conformation also poses obstacles to the normal β-oxidation pathway and modifications are required to bypass these (Gerhardt, B., Lipid metabolism in plants (Moore, T. S., Jr., ed.), CRC Press Inc., pp. 527-565 (1993)). The D-4-hydroxy- decanoate-CoA and D-2-hydroxy-octanoate-CoA intermediates were predicted to arise in the degradation of ricinoleic acid (D-12-hydroxy-oleic acid (9-cis)). To investigate whether these intermediates might be incorporated into the PHA polymer by the PHA synthase, ricinoleic acid was used to supplement the medium in which PHACl plants were germinating. No major peaks due to the incorporation of novel monomers into the PHA polymer were detected, but GC-MS analysis was utilized to search for specific predicted novel monomers by looking for characteristic fragmentation products, namely ions 117 and 89. A small peak was found with ion 117, this peak showed the fragmentation fingerprint of the D-4-hydroxy-decanoate-methyl ester and was absent in the corresponding negative control. No novel peak was found with ion 89, thus excluding the possibility that the D-2- hydroxy-octanoate was incorporated into the polymer. It is known that the PHA synthase can incorporate D-4-hydroxy- and D5-hydroxy monomers into PHA in bacterial cultures, therefore the incorporation of the D-4-hydroxy-decanoate in the germinating seeds fed with ricinoleic acid was plausible. The very low abundance of the monomer could perhaps be explained by an alternative and more efficient pathway for the degradation of ricinolate (Gerhardt, B., Lipid metabolism in plants (Moore, T. S., Jr., ed.). CRC Press Inc., pp. 527- 565 (1993)).
Table 2. Quantity of PHA production in PHACl seedlings germinated in liquid medium supplemented with fatty acids
Figure imgf000033_0001
a The plant material (of specified weight) was transesterified in different volumes, but the integrated peak-areas were calculated to homologate the sample-volumes (1 mL chloroform, of which 1 μL was analyzed by GC).
Table 3. Monomer composition of PHA produced in PHACl seedlings germinated in liquid medium supplemented with fatty acids
Figure imgf000034_0001
a 8M-H9 and 6M-H7 refer to 8-methyl-3-D-hydroxy-nonanoic acid and 6-methyl-3-D- hydroxy-heptanoic acid, respectively. b 4-OH-H10 refers to D-4-hydroxy-decanoate. c The quantity of 4-OH-H10 was estimated by comparing peak sizes with H6 on a GC-MS chromatogram.
EXAMPLE 8: Extraction of high molecular weight PHA
The presence of derivatized monomers of PHA in PHACl plants had been established by the GC-analysis of trans-esterified intact plant material. To prove that the PHA was synthesized as high-molecular weight polymer and for its physico-chemical characterization, the purification of large quantities (i.e. in the mg range) was undertaken. Seeds of PHACl #3.3 were germinated in liquid medium with and without addition of TWEEN-20 in order to obtain TWEEN-20-derived PHA or unmodified PHA, respectively. For the TWEEN-20-derived PHA, approximately 16000 seeds (313 mg dry seeds) were germinated in 900 mL l/2xMS + 1% sucrose medium for 7 days under continuous illumination on a shaker, the medium was replaced with l/2xMS + 2% sucrose containing 5% TWEEN-20 and the seedlings were grown for another 9 days in the light. The plant material was harvested, washed extensively with water to remove residual TWEEN-20, frozen and lyophilized. The dry material was ground with a mortar and pestle, weighed, and lipids were extracted by a six-hour Soxhlet-extraction with methanol. The methanol- insoluble PHA was extracted for 24 hours in the same manner with chloroform. The chloroform extract was concentrated under reduced pressure and the PHA was precipitated by the addition of 10 volumes of cold methanol. This methanol precipitation was performed twice to ensure a high purity of the PHA. 27 mg of PHA was thus obtained from 5.35 g lyophilized and powdered seedling material, which related to 0.50% weight/dry weight. The PHA was trans-esterified and analyzed by GC. It was found that 58% of the PHA present in the methanol-extracted plant powder was extracted by the chloroform. It has been established in previous experiments that this remaining PHA was recalcitrant to extraction. The chromatogram showed that the extracted PHA was adequately pure with the peaks of the six identified monomers constituting 93% of the total integrated area. The ratio of the integrated areas between the different monomers was very similar to the result shown in Table 1 for the sample containing TWEEN-20 and grown under light, see Table 4.
For the extraction of high-Mr PHA produced by PHACl plants without additional fatty acid supplements (native PHA), 1076 mg seeds (approx. 54000 seeds) were germinated in 3.3 L liquid medium (l/2xMS, 2% sucrose). The seeds were germinated under continuous illumination for 6 days, thereafter the medium was replaced and the seedlings put into the dark for another 7 days in order to induce plant senescence. The PHA was extracted from the plant material as above and one methanol precipitation was performed to purify the PHA. 23 mg of PHA was obtained from 14.3 g dry plant material, which related to 0.16 % weight/dry weight. It was determined that >69 % of the PHA had remained in the plant material after the chloroform extraction, which could be due to either the high content of C8: l monomer (see Table 5) causing the polymer to "stick", or due to moisture in the ground material which had not been lyophilized completely, or due to the large sample size for which a longer and more efficient chloroform extraction might have been required. The purification of native PHA and analysis by GC-MS allowed the detection of several more peaks that could not be initially resolved in crude extracts because of the high level of noise in the chromatogram. A total of eighteen 3-hydroxyacid monomers could be detected in the polymer (Table 1). In addtion to 3-hydroxyhexanoic acid (H:6), 3-hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14) and 3-hydroxyoctenoic acid (H8:l) monomers previously detected in the transesterification of intact plant material (crude extract) (Table 1), novel saturated and unsaturated monomers were detected which include 3-hydroxyhexadecanoic acid (H:16), 3-hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3-hydroxyhexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (HI 6:2), 3 -hydroxy hexadecenoic acid (HI 6:1), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3- hydroxytetradecenoic acid (H14:l), 3-hydroxydodecadienoic acid (H12:2) and 3- hydroxydodecenoic acid (HI 2:1). All even-chained monomers could be quantified and results are shown in Table 5.
It is expected that many of the unidentified minor peaks detected in the PHA purified from the TWEEN-20-fed seedlings would correspond to some of the minor saturated and unsaturated monomer detected in the "native" PHA.
Table 4. Comparison of the monomer composition of purified high-molecular weight PHA from Tween-20 feed plants with results obtained for transesterified intact seedlings during the preliminary feeding studies
Figure imgf000036_0001
Integrated area on the chromatogram. Table 5. Monomer composition of "native" PHA isolated from phaCl -transformed plant line 3.3 grown in liquid media3
Figure imgf000037_0001
a Quantification of methyl esters was performed with a GC with a FID detector. Values were obtained from four separate PHA preparations. Monomers present in trace amounts (H9, H:l 1, H:13, H16:l) were not quantified.
EXAMPLE 9: Chemical characterization of high-molecular weight plant PHA
Purified TWEEN-20-derived PHA (13 mg) and unmodified PHA (5 mg) were given to Geraldine Coullerez at the EPFL (collaboration IBPV-EPFL) for the physico-chemical characterization of the polymer. Two different samples of bacterial PHA, PHA1 and PHOE, were obtained from Witholt and Kellerhals (ETH Zurich) to be used as controls. PHA1 contained predominantly H6 and H8 monomers (10% and 90%, respectively), while PHOE contained 4-10% H8:l, the balance being H6 and H8. The molecular weights and the respective dispersion coefficients of the polymers were determined by gel permeation chromatography (see Table 6). Polystyrene polymers were used as molecular weight standards. The results clearly show that the TWEEN-20 derived PHA produced by the transgenic plants is in the form of a high-Mr polymer (about 200-250 monomers), although the molecular weight is only 20-25% of the bacterial polymers (about 1000 monomers). This shorter polymer length can be explained by an overabundance of PHA synthase relative to its substrate concentration and similar results have also been obtained in in vitro polymerization assays with purified PHB synthase (Jun Sim, S. et al., Nature Biotechnology 15: 63-67 (1997)). It is also possible that PHA polymers with longer chain lengths are trapped in the plant material, since a significant proportion of the PHA seems to be recalcitrant to chloroform extraction (> 50%, difficult to determine exact amounts in the trans-esterification of intact or powderized plant material, see above).
NMR analysis of the plant and bacterial PHAs revealed, that the TWEEN-20 derived plant PHA had the same structure as the bacterial PHA. The NMR spectrum of the unmodified plant PHA showed the peaks characteristic for the PHA polymer backbone, as well as several other peaks which have not been properly assigned or identified at this stage, but which could be due to various unsaturated bonds in the side chains of the polymer.
Table 6. Comparison of molecular weights of high-Mr PHAmc| purified from plants and bacteria
Figure imgf000038_0001
EXAMPLE 10: The multifunctional protein (MFP) from the yeast Candida tropicalis
In animals, plants and bacteria, β-oxidation has been shown to proceed via the L- isomer of the 3-hydroxy-acyl-CoA intermediates and any D-isomers (which are predicted to arise in the degradation of fatty acids containing cis-unsaturated bonds at even-numbered carbons) have to be converted to the L-form in order to be oxidized further by the dehydrogenase activity of the multifunctional protein (MFP). In yeast the β-oxidation was reported to proceed via the D-isomer (Nuttley, W. M. et al., Gene 69: 171-180 (1988); Hiltunen, J. K. et al., J. Biol. Chem. 267: 6646-6653 (1992); Fossa, A. et al., Mol. Gen. Genet. 247: 95-104 (1995)). The yeast multifunctional protein (MFP) was shown to contain enoyl-CoA hydratase II and D-3-hydroxyacyl-CoA dehydrogenase activities, which together converted trans-2-enoyl-CoA via D-3-hydroxyacyl-CoA to 3-ketoacyl-CoA, i.e. the D- isomer was directly utilized by the dehydrogenase without prior conversion to the L-form. It is anticipated that expression of this hydratase II activity together with the PHA synthase in the peroxisomes of double-transgenic plants will generate more of the D-3-hydroxy-acyl- CoA intermediates for their incorporation by the PHA synthase into the PHA polymer, thus increasing the final yield of PHA. Four separate approaches are envisioned.
A. Expression of the unchanged MFP from C. tropicalis in A. thaliana.
Since the hydratase II activity forms part of the MFP it was decided to perform investigatory experiments with the complete MFP prior to attempting to abolish the D-3- hydroxyacyl-CoA dehydrogenase activity. As the fungal MFP already had a peroxisomal targeting signal, this protein was expected also to be targeted to the plant peroxisomes.
The C. tropicalis MFP cDNA (Nuttley, W. M. et al., Gene 69: 171 -180 (1988), GenBank Accession Number M22765) was cloned via PCR amplification (SEQ ID NO:21 , encoding SEQ ID NO:22) into pART7 to obtain pART7_MFP. The Notl-cassette, containing the CAMV35S-promoter in front of the MFP gene and the ocs3'- terminator, was inserted into the plant binary vector pART27 to obtain pART27_MFP, which was transformed into Arabidopsis. Transgenic plant were selected on kanamycin and screened for the expression of the MFP protein with an anti-MFP antiserum. Homozygous T2 plants were cross-fertilized with PHACl #3, PHACl #4 and PHACl #9 plants. Offspring from these crosses will be analyzed for their ability to biosynthesize PHA.
B. Changing the peroxisomal targeting signal of the yeast multifunctional protein
(MFP) from -AKI to -SKL.
The COOH-terminal tripeptide -AKI was shown to be responsible for peroxisomal targeting of the MFP in yeast, but it has not yet been demonstrated to function in plant peroxisomal targeting. The MFP. SKL gene, in which the 3'-terminal nucleotide sequence of the MFP gene encoding the -AKI tripeptide had been changed to -SKL by PCR site-directed mutagenesis (SEQ ID NO:23, encoding SEQ ID NO:24), was obtained from the laboratory of K. Hiltunen to ascertain that the MFP was properly targeted to the plant peroxisomes and to serve as a positive control in targeting studies with the yeast multifunctional protein (MFP) in plant cells. The MFP.SKL gene was used to construct pART7_MFP.SKL. The Notl-cassette of pART7_MFP.SKL, containing the MFP-SKL gene flanked by the CaMV35S promoter and the ocs3'-terminator, was cloned into pART27 to obtain pART27_MFP.SKL, which was transformed into A. thaliana ecotype Columbia. Kanamycin resistant Tl plants were obtained. The high-MFP.SKL-expressing lines will be selected by Western analysis of T2 plants, and the selected lines will be crossed with PHACl #3.3 plants.
C. Deleting the peroxisomal targeting signal of the yeast multifunctional protein (MFP..
The construct pART7_MFPΔAKI was obtained by PCR amplification of the MFP gene such that the 3 '-terminal nucleotide sequence of the MFP gene encoding the -AKI tripeptide was deleted by the introduction of a stop codon (SEQ ID NO:25, encoding SEQ ID NO:26). The "detargeted" MFPΔAKI is expected to be localized in the cytoplasm and will be utilized as negative control in experiments to study the localization of MFP and MFP.SKL in plant cells. pART27_MFPΔAKI was transformed into A. thaliana ecotype Columbia and Kanamycin resistant Tl plants were obtained. The high-MFPΔAKI- expressing lines will be selected by Western analysis of T2 plants and these lines will be crossed with PHACl #3.3 plants.
D. Deleting the dehydrogenase activity of the yeast multifunctional protein (MFP).
As only the hydratase II activity of the yeast multifunctional protein (MFP) is of interest, plants will be transformed with the MFPΔDH gene, in which the dehydrogenase activity was deleted by site-directed mutagenesis of specific amino acid residues identified as being essential for this activity.
EXAMPLE 11 : Verification of enzyme activity of modified MFP constructs in Pichia The modified MFP.SKL and MFPΔAKI genes were subcloned from pART7_MFP.SKL and pART7_MFPΔAKI into the yeast expression vector pHILD2. The resulting plasmids pHILD2_MFP.SKL and pHILD2_MFPΔAKI were transformed into Pichia and enzyme assays were performed in Hiltunen's laboratory. Results indicated that the modifications to the genes did not have an effect on the dehydrogenase and the hydratase enzymatic activities.
EXAMPLE 12: Expression of the FatB3 acyl-ACP thioesterase in double transgenics to increase PHA yield
Expresion of the California bay acyl-ACP thioesterase was shown to cause premature termination of fatty acid elongation during fatty acid biosynthesis in transgenic oilseed plants (Voelker, T. A. et al., Science 257: 72-74 (1992)). The resulting medium- chain-length fatty acids were found to accumulate in the triglycerides of seed lipids, but could not be detected in leaves. It is thought that medium chain fatty acids do not accumulate in the leaves of transgenic plants because they get degraded immediately by β- oxidation (Eccleston, V. S. et al., Planta 198: 46-53 (1996)). This increased flux of medium-chain fatty acids through β-oxidation may be exploited to improve the yield of PHA, as well as to modify the composition of the polymer towards saturated H6-H14 monomers in double transgenic plants expressing both acyl-ACP thioesterase and the PHACl synthase.
The plasmid pBJ49_FatB3 containing the Cuphea lancolata thioesterase FatB3 gene under control of a 200 bp minimal promoter derived from the 35S promoter was infiltrated into the A. thaliana PHACl #3.3 transgenic line which is homozygous for the PHACl gene. Hygromycin resistant lines where obtained and the seed lipid content of Tl seeds was analysed for increased levels of medium chain length fatty acids and 1 1 separate lines expressing high levels of the acyl-ACP thioesterase were identified in this manner. Subsequently the polyhydroxyalkanoate content of leaves from soil grown T2 double transgenic offspring was determined by GC and GC-MS analysis of the 3-hydroxy-fatty acid methyl esters obtained by transesterification of whole leaves. The results (Table 7) indicated an approximate tenfold increase in the polyhydroxyalkanoate content of leaves from double transgenic plants when compared to plants expressing only the PHACl synthase. The increased polyhydroxyalkanoate yield was mainly due to a large increase in the content of the saturated polyhydroxyalkanoate monomers with an even number of carbons, namely 3-OH-octanoate (H8), 3-OH-decanoate (H10), 3-OH-dodecanoate (H12) and 3-OH-tetradecanoate (HI 4) (Table 8).
The recombinant FatB3 acyl-ACP thioesterase is naturally targeted to the chloroplast, where it removes medium chain-length acyl-ACP intermediates from the fatty acid biosynthesis. These short chain fatty acids accumulate in the seed lipids, but not in the leaves of transgenic plants and it has been speculated, that they are immediately degraded by β-oxidation. Results with these double transgenic plants indicate that there is indeed an increase in the β-oxidation of medium chain length fatty acids in the leaves, which results in a higher yield of polyhydroxyalkanoate due to the incorporation of the β-oxidation intermediates into the PHA by the polyhydroxyalkanoate synthase.
Table 7. PHA content of leaves from single and double transgenic plants expressing the PHACl synthase alone or together with the FatB3 acyl-ACP thioesterase
Plants PHA contet-tjiag/g fresh weight) -
A*r;,, averages stxidesviatioB
PHACl #3.3 plant 1 0.0040
PHACl#3.3 plant 2 0.0253 0.0147 0.015
PHAC1#3.3 + FatB3 line 2.4a plant 2 0.1281
PHACl #3.3 + FatB3 line 2.4b plant 1 0.0749 0.1175 0.038
PHAC1#3.3 + FatB3 line 2.4b plant 5 0.1495
Table 8. PHA content of leaves from single and double transgenic plants expressing the PHAC 1 synthase alone or together with the FatB3 acyl-ACP thioesterase
Figure imgf000043_0001
EXAMPLE 13: Crossing PHACl #3.3 transgenic plants with fatty acyl hydroxylase LFahl2 transgenic plants
Three lines of transgenic A. thaliana expressing the LFahl2 fatty acyl hydroxylase gene from Lesquerella were obtained from Pierre Broun (Chris Somerville's laboratory, Carnegie Institution, Stanford, CA). This fatty acyl hydroxylase is responsible for the production of ricinoleic acid (C18:l ; 9-cis, D-12-hydroxy) in Lesquerella. It was found that hydroxylated fatty acids accumulated in the seed triglycerides of Arabidopsis, but not in the leaves, again indicating that hydroxylated fatty acids synthesized in leaves are most likely degraded by β-oxidation (Broun, P. and Somerville, C, Plant Physiol 113: 933-942 (1997); van de Loo, F.N. et al., Proc. Natl. Acad. Sci. U.S.A. 92: 6743-6747 (1995)). Crosses were made with the three fatty acyl hydroxylase transgenic lines and the PHACl #3.3 line and the seeds of these crosses were harvested. Seeds and their progeny plants will be examined for their levels of PHA biosynthesis. The aim of this experiment is to investigate if the increased flux of hydroxylated fatty acids to the β-oxidation cycle in transgenic plants expressing the Fah 12 and PHA synthase genes can lead to an increase in the yield of PHA and if novel hydroxylated monomers can be incorporated in the PHA. EXAMPLE 14: Influence of carbon source and light conditions on PHA synthesis
The amount of PHA present in plant tissues was influenced by the growth conditions . For plants grown for three weeks under constant illumination in MS liquid media with 2% sucrose, the yield of PHA was approximately 0.6 mg/g dry weight (dwt). Removal of sucrose for the last week of growth in the light resulted in a 100% increase in PHA, while plants growing in 2% sucrose but shifted in the dark for the last week accumulated 22% more PHA (Table 9).
Table 9. Influence of sucrose and light on PHA accumulation in phaCl -transformed line 3.3
Figure imgf000044_0001
a Seedlings were grown under constant illumination in a liquid medium containing MS salts and 2% (w/v) sucrose for 2 weeks, and then grown for another week, either in the dark or in the light, in media containing different concentrations of sucrose. b The yield of 1.42 mg/g dry weight was arbitrarily defined as 100%.
EXAMPLE 15: Peroxisome targeting
It has been shown in multiple sytems (e.g., yeast, animal, and plants) that targeting of proteins to the peroxisome can be acheived by the addition of as little as three amino acids at the carboxy end of a foreign protein (see Gietl, C, Physiol Plant. 97: 599-608 (1996); Purdue, P.E. and Lazarow, P. B., J. Biol. Chem. 269: 30065-30068 (1994); Subramani, Ann. Rev. Cell Biol, 9: 445-478 (1993)). The minimal consensus sequence for peroxisome targeting of protein via the carboxy end, named PTSl for peroxisomal targeting sequence 1, is a small uncharged amino acid at position 1 (S, A, or P), a positively-charged amino acids at position 2 (K, R. S, or H), and a hydrophobic amino acid at position 3 (L, M, I or F).
Thus, although the initial minimal PTSl sequence was defined as SKL. a range of substition have been found to be effective PTSl signal, including ARM, SRM, SKL, ARL, SRL, PSI, or PRM. Specific examples of targeting of foreign proteins in plants include: 6 amino acid PTSl (RAVARL, Volokita, M., Plant JΛ : 361-366 (1991)); 5 amino acids PTSl (AKSRM, Olsen, L. J. et al, Plant Cell 5: 941-952 (1993)); 4 amino acids PTSl (KSRM, Trelease, R. N. et al., Protoplasma 195: 156-167 (1996)); 5 amino acid PTSl (ELSRL, Hayashi, M et al, Plant J. 10: 225-234 (1996)); 4 amino acid PST1 (RPSI, Mullen R. T. et al, Plant J. 12: 313-322 (1997)); 3 amino acid PTSl (SKL, Banjoko, A. et al., Plant Physiol 107: 1201-1208 (1995)); 3 amino acid PTSl (ARM, Lee, M.S. et al., Plant Cell 8: 185-197 (1997)).
A comparison of the peroxisomal targeting sequence 1 (PTSl) found in mammals, fungi and trypanosomes was performed by Purdue, P.E. and Lazarow, P.B. (J Biol. Chem. 269: 30065-30068 (1994). All sequences shown in Table 10 are functional in at least one species. Other sequences may or may not have been tested. For trypanosomes, all sequences with a single amino acid change from SKL that are not shown are nonfunctional. The asterisks refer to the fact that -NKL and -SQL (outside the mammalian consensus, but not directly tested) have been found at the C termini of mammalian peroxisomal proteins. Uppercase, functional; lowercase, nonfunctional; underlined, not yet found on a peroxisomal protein in that species.
Table 10. C-terminal peroxysomal targeting sequences.
Figure imgf000046_0001
The minimal peroxisomal targeting sequence 1 (PTSl) in plants has been found to be ARM, SRM, SKL, ARL, SRL, PSI, and PRM (Compilation from Volokita, M., Plant J., 1: 361-366 (1991); Olsen, L.J. et al., Plant Cell, 5: 941-952 (1993); Trelease, R.N. et al., Protoplasma, 195: 156-167 (1996); Gietl, C, Physiol Plant., 97: 599-608 (1996); Purdue, P.E. and Lazarow, P.B., J. Biol Chem., 269: 30065-30068 (1994); Subramani, Ann. Rev. Cell Biol, 9:445-478 (1993); Mullen, R.T., et al., Plant J, 12: 313-322 (1997); Lee, M.S., et al., Plant Cell, 9: 185-197 (1997)).
Some proteins are targeted to the peroxisome via an N-termianl extension called PTS2 for peroxisome targeting sequence 2. In this case, a consensus sequnce of nine amino acids has been defined, being (R K)(L/Q/I)XXXXX(H/Q)L. Foreign protein (eg β- glucuronidase) can also be targeted in plants to the peroxisome by adding a PTS2 sequence at the N-terminal end of the protein (Kato et al, Plant Cell 8: 1601-1611 (1996)).
EXAMPLE 16: Co-expression of PHA with other sequences resulting in increased or novel PHA biosynthesis
PHAmcl synthesized in transgenic plants can include a large variety of monomers, with functional groups that can be used to modify and improve the characteristics of the polymer before or after extraction form the plant. For example, the presence of double bonds, epoxy groups, or acetylated groups within the PHA may be used to cross-link the polymer. The examples herein have demonstrated the incoφoration of the following range of monomers into plant PHAmcl: even-chain saturated 3-OH-acyl monomers with six to sixteen carbons; odd-chain saturated 3-OH-acyl monomers with seven to thirteen carbons; unsaturated 3-OH-acyl monomer with 8, 12, 14, and 16 carbons and with 1, 2, or 3 double bonds; branched-chain 3-OH-acyl monomers (8-methyl-3-D-hydroxy-nonanoic acid and 6- methyl-3-D-hydroxy-heptanoic acid) and 4-OH-acyl monomers (D-4-hydroxy-decanoate). Although in these experiments some monomers, such as branched-chain, odd-chain or hydroxylated 3-hydroxyacids, were found included in PHAs after exogenous fatty acids were supplied to the transgenic plants, the same range of monomers would also be included in plant PHA from fatty acids supplied from endogenous fatty acid synthesis. Thus, one can predict being able to synthesize PHA polymers in plants that have a wide range of monomers, for example, higher proportion of short-chain monomers, unsaturated bonds at novel positions, monomers with hydroxylated groups, epoxy groups, acetylated groups, keto groups, cyclopentenyl groups, cyclopropanoid groups, furanoid groups or halogenated groups, branched chain, cyclic groups or any other novel monomers for which the equivalent functional groups exist in fatty acids in plants. The incoφoration of these novel monomers derived from fatty acids into plant PHAs could be accomplished by expressing a PHA synthase in a plant which synthesizes these unusual fatty acids either naturally or after expression of a transgene such as fatty-acyl-thioesterases, -hydroxylases, -desaturases, - epoxidases, or -acetylases. It is also conceivable that the substrate specificity of the PHA synthase could be modified to allow the incoφoration of a wider range of monomers into PHA. One can predict that the range of monomers which could be included into plant PHAs from such a modified PHA synthase will include monomers that can be derived from plant fatty acid metabolism found in wild type plants or plants expressing transgenes (such as desaturases, hydroxylases, thioesterases, epoxydases, acetylases) which results in the modification of fatty acids synthesized in plants. It is also conceivable that suitable hydroxy acid substrates for the PHA synthase can be obtained from the amino acid metabolism or the plant secondary metabolism.
It has been demonstrated before that plants can synthesize PHB from acetyl-CoA through the expression of the 3-ketothiolase, acetoacetyl-CoA reductase and PHB synthase from . eutrophus (Poirier, Y. et al., Science 256: 520-523 (1992); Nawrath, C. et al., Proc. Natl. Acad. Sci. U.S.A. 91 : 12760-12764 (1994)). The examples herein demonstrate that PHAmc| can be synthesized in plants expressing a PHA synthase which can accept monomers from H6-H16. Since acetyl-CoA is also found in the peroxisome, one can predict that co-expression of a PHA synthase with a substrate specificity for 3 -hydroxy acids ranging from H4 to H8 or higher in the peroxisome, and of the A. eutrophus acetoacetyl- CoA reductase, would lead to the biosynthesis of a copolymer containing hydroxybutyrate and hydroxyacids of H6 and higher. In this pathway, the expression of the 3-ketothiolase from A. eutrophus may not be required since the peroxisome already contains a 3- ketothiolase.
The examples herein clearly show that synthesis of PHA in plants can be significantly enhanced by increasing the pool of fatty acids which is channeled through β- oxidation. Thus, when short-chain fatty acids were added externally in the form of TWEEN-20 to PHACl -transgenic plants, there was a 30- fold increase in the amount of PHA synthesized in plants. Similar large increases in PHA synthesis were found when tridecanoic acid and 8-methyl-nonanoic acid were added to the growth media. It is hypothesized that because these fatty acids could not be incoφorated into membranes without disrupting them, the fatty acids are detoxified by channeling them to the peroxisome for degradation by the β-oxidation cycle. Thus, increased channeling of fatty acids to the β- oxidation cycle results in an increase in PHA synthesized using intermediates of fatty acid oxidation. One can predict from this work that any changes in plants which results in an increased flux of fatty acids to the β-oxidation cycle will results in an increase in PHA synthesis in plants expressing a PHA synthase targeted to the peroxisome. Increasing the flux of fatty acids to the β-oxidation cycle could be accomplished by overexpressing enzymes which lead to the biosynthesis of modified fatty acids. This has been demonstrated in plants expressing thioesterase (Eccleston, V.S. et al., Planta 198: 46-53 (1996)) and implied in plants expressing hydroxylase (van de Loo, F.N. et al., Proc. Natl. Acad. Sci. U.S.A. 92: 6743-6747 (1995)). Increase of flux of lipids to the β-oxidation cycle and to PHA synthesis could also be accomplished by expressing other fatty acid modifying enzymes, such as desaturases, epoxydases, acetylases, enzymes involved in synthesis of branched-chain fatty acids, etcetera. This concept has been directly demonstrated in this present work with a fatty acyl-ACP thioesterase. It was shown that co-expression of a fatty acyl-ACP thioesterase in a plant expressing a peroxisomal PHA synthase leads to a 10 fold increase in PHA (Table 7). In addition of increasing the amount of PHA in plants , expression of the thioesterase leads to a predictable change in the composition of the PHA, i.e. since the C. lanceolata FatB3 thioesterase has the highest affinity for saturated CIO fatty acyl-ACP, there is a corresponding large increase in hydroxy decanoic acid (H10) present in the plant PHA (Table 8). Thus, expression of fatty acid modifying enzymes in conjunction with a PHA synthase in plants not only leads to an increase in the amount of PHA synthesized in plants, but also leads to a predictable changes in the PHA monomer composition, e.g. co-expression of a short-chain fatty acyl-ACP thioesterase would lead to an increase in the proportion of short-chain hydroxyacid monomers in plant PHA, co- expression of a long-chain fatty acyl-ACP thioesterase would lead to an increase in the proportion of long-chain hydroxyacid monomers in plant PHA, co-expression of a fatty acyl hydroxylase would lead to an increase in the proportion of hydroxylated hydroxyacid monomers in plant PHA, co-expression of a fatty acyl epoxidase would lead to an increase in the proportion of epoxidated monomers in plant PHA, co-expression of a fatty acyl acetylase would lead to an increase in the proportion of acetylated hydroxyacid monomers in plant PHA, and co-expression of a fatty acyl desaturase would lead to an increase in the proportion of unsaturated hydroxyacid monomers in plant PHA. Increase in flux of lipids through the β-oxidation cycle could also be accomplished by overexpressing the key regulators (i.e. transcriptional factors) involved in the up-regulation of the entire β-oxidation cycle pathway during germination or senescence. This last approach would have the advantage of turning-on the β-oxidation cycle in tissues which normally have only low activity, such as the developing seeds of oil crops.
The examples herein point out the impact of fatty acid modifying enzymes for the production of novel PHA in transgenic plants expressing a PHA synthase. One key enzyme appears to be a 3-hydroxy-acyl-CoA epimerase. Although the normal function of the epimerase is to convert D-3-hydroxy-acyl-CoAs to the L-form required for the action of the L-3-hydroxy-acyl-CoA dehydrogenase, the reverse reaction of the epimerase can be responsible for converting the L-form to the D-form, which is essential for the activity of the PHA synthase. For that puφose the epimerase is important for the supply of the substrates for the PHA synthase derived from β-oxidation in the peroxisomes. Recombinant forms of such an epimerase activity expressed in peroxisomes or in other plant cell compartments like the cytoplasm or the plastids could play an important role in the production of PHA in transgenic plants. It is possible that the slow rate of the epimerase "reverse reaction" could be the major factor limiting the supply of substrates for the PHA synthase. The substrate limitation due to this could be the reason why PHA synthesis seemed to have reached a maximum in seedlings germinated both in the light and in the dark in liquid medium supplemented with TWEEN-20, which contains only saturated fatty acids.
The importance of certain fatty acid desaturases is highlighted by Table 3, wherein petroselinic acid (C18:l, 6-cis) was supplied to germinating PHACl #3.3 seedlings in liquid medium, resulting in the specific increase of the HI 4 monomer. This indicated that any fatty acid containing unsaturated bonds starting at even-numbered carbons directly gives rise to the appropriate D-3-hydroxy-acyl-CoAs during β-oxidation, thus bypassing the otherwise necessary "reverse reaction" of the epimerase to generate the D-intermediates. Similarly the H8 and the H8:l monomer are predicted to originate from the unsaturated fatty acids linoleic acid (C18:2, 9,12-all cis) and linolenic acid (C18:3, 9,12,15-all cis). For that reason any plant containing high levels of fatty acids with unsaturated bonds starting at even-numbered carbons could be of interest for the production of PHAmcl, or the transgenic expression of suitable fatty acid desaturases producing such unsaturated fatty acids in plants containing the PHA synthase would be similarly attractive for PHA production and monomer manipulation.
The examples herein demonstrate that a peroxisomally-located PHA synthase is able to divert intermediates from β-oxidation for their incoφoration into PHA. The existence of the required D-3-hydroxy-acyl-CoA substrates was important for the synthesis of PHA. In light of the present disclosure, one may predict that PHA can be produced in a similar manner in any other compartment of any plant cell, provided that a supply of such D-3- hydroxy-acyl-CoA intermediates is present due either to an endogenous metabolic pathway or due to an artificially created pathway utilizing expression of transgenes. Fatty acid biosynthesis occurs in the plastids in plant cells, and modifications of this pathway could turn the plastids into a suitable source of D-3-hydroxy-acyl-CoA intermediates, which could subsequently be used to produce PHA either in the plastid itself or in other cell compartments.
EXAMPLE 17: Protein analysis
Leaves from transgenic plants were homogenized in 200 mM Tris-HCl (pH 7.5), 250 mM EDTA, 5 mM dithiothreitol and 1 mM phenylmethylsulfonyl fluoride. The homogenate was clarified by centrifugation and protein analyzed by Western blot using the ECL detection system (Amersham, Arlington Heights, IL).
EXAMPLE 18: Immunolocalization
Transgenic plants were grown on media containing MS salts, 1% sucrose, 0.7% agar and 50 μg/mL kanamycin for either 7 days in the light or 1 day in the light followed by 6 days in the dark. Whole plants were fixed for 2 hours at room temperature in 4% formaldehyde, 0.5% glutaraldehyde, 50 mM sodium cacodylate pH 7.3. The tissue samples were dehydrated in an ethanol series and embedded in LR White resin. Ultra thin sections were cut using a microtome, mounted on formvar-coated gold grids and blocked in 0.8% (w/v) bovine serum albumin, 0.1% (w/v) gelatine, 5% (w/v) normal goat serum and 2 mM sodium azide in PBS (10 mM sodium phosphate, 150 mM sodium chloride, pH 7.4). Grids were incubated for 1 hour at room temperature with antiserum against PHA synthase (1 :50), glycolate oxidase (1:2000) and isocitrate lyase (1 : 1000) in the blocking solution followed by a 4 hour incubation at room temperature with a 1 :50 dilution of gold-conjugated goat anti- rabbit antibodies (15 nm gold particles) in PBS. Immunolabeled sections were doubled- stained with uranyl acetate and lead citrate and viewed with a Jeol JEM transmission electron microscope.
EXAMPLE 19: PHA extraction and analysis
Fresh or dried frozen plant material was ground in a mortar and lyophilized. The powder was extracted with methanol in a Soxhlet apparatus for 24 hours followed by PHA extraction with chloroform for 24 hours, both at 85°C. The PHA-containing chloroform was concentrated under reduced pressure and extracted once with water to remove residual solid particles. PHA was precipitated by the addition of 10 volumes of cold methanol and subsequently washed by two cycles of chloroform solubilisation and methanol precipitation. PHA dissolved in chloroform was transesterified by acid methanolysis (Huijberts, G. N. et al., Appl. Environ. Microbiol. 58: 536-544 (1992)) and analyzed by gas-chromatography and mass spectrometry (GC-MS) using a Hewlett-Packard 5890 gas chromatograph (30 m long HP-5MS column) coupled to a Hewlett-Packard 5972 mass spectrometer (Hewlett Packard, Palo Alto, CA). Molecular weight determination of PHA samples were determined by gel permeation chromatography on a Waters 150 CV (Waters Coφ., Milford, MA) equipped with a differential refractive index detector and an on-line viscometer and three ultrastyragel columns in series (10 , 10 and 10 A). Samples were prepared in dichloromethane and calibration performed using polystyrene standards. EXAMPLE 20: Plant Vectors
In plants, transformation vectors capable of introducing encoding DNAs involved in PHA biosynthesis are easily designed, and generally contain one or more DNA coding sequences of interest under the transcriptional control of 5' and 3' regulatory sequences. Such vectors generally comprise, operatively linked in sequence in the 5' to 3' direction, a promoter sequence that directs the transcription of a downstream heterologous structural DNA in a plant; optionally, a 5' non-translated leader sequence; a nucleotide sequence that encodes a protein of interest; and a 3' non-translated region that encodes a polyadenylation signal which functions in plant cells to cause the termination of transcription and the addition of polyadenylate nucleotides to the 3' end of the mRNA encoding said protein. Plant transformation vectors also generally contain a selectable marker. Typical 5 '-3' regulatory sequences include a transcription initiation start site, a ribosome binding site, an RNA processing signal, a transcription termination site, and/or a polyadenylation signal. Vectors for plant transformation have been reviewed in Rodriguez et al. (Vectors: A Survey of Molecular Cloning Vectors and Their Uses, Butterworths, Boston. (1988)), Glick et al. (Methods in Plant Molecular Biology and Biotechnology, CRC Press, Boca Raton, Fla. (1993)), and Croy (Plant Molecular Biology Labfax, Hames and Rickwood (Eds.), BIOS Scientific Publishers Limited, Oxford, UK. (1993)).
EXAMPLE 21 : Plant Promoters
Plant promoter sequences can be constitutive or inducible, environmentally- or developmentally-regulated, or cell- or tissue-specific. Often-used constitutive promoters include the CaMV 35S promoter (Odell et al., Nature 313: 810 (1985)), the enhanced CaMV 35S promoter, the Fig wort Mosaic Virus (FMV) promoter (Richins et al., Nucleic Acids Res. 20: 8451 (1987)), the mannopine synthase (mas) promoter, the nopaline synthase (nos) promoter, and the octopine synthase (ocs) promoter. Useful inducible promoters include promoters induced by salicylic acid or polyacrylic acids (PR-1 , Williams , S. W. et al, Biotechnology 10: 540-543 (1992)), induced by application of safeners (substituted benzenesulfonamide herbicides, Hershey, H.P. and Stoner, T.D., Plant Mol. Biol. 17: 679- 690 (1991)), heat-shock promoters (Ou-Lee et al., Proc. Natl. Acad. Sci U.S.A. 83: 6815 (1986); Ainley et al., Plant Mol. Biol. 14: 949 (1990)), a nitrate-inducible promoter derived from the spinach nitrite reductase gene (Back et al., Plant Mol. Biol. 17: 9 (1991)), hormone-inducible promoters (Yamaguchi-Shinozaki et al., Plant Mol. Biol. 15: 905 (1990); Kares et al., Plant Mol. Biol. 15: 905 (1990)), and light-inducible promoters associated with the small subunit of RuBP carboxylase and LHCP gene families (Kuhlemeier et al., Plant Cell 1 : 471 (1989); Feinbaum et al., Mol. Gen. Genet. 226: 449 (1991); Weisshaar et al., EMBO J. 10: 1777 (1991); Lam and Chua, J. Biol. Chem. 266: 17131 (1990); Castresana et al., EMBO J. 7: 1929 (1988); Schulze-Lefert et al., EMBO J. 8: 651 (1989)). Examples of useful tissue-specific, developmentally-regulated promoters include the β-conglycinin 7S promoter (Doyle et al, J. Biol. Chem. 261 : 9228 (1986); Slighton and Beachy, Planta 172: 356 (1987)), and seed-specific promoters (Knutzon et al., Proc. Natl. Acad. Sci U.S.A. 89: 2624 (1992); Bustos et al., EMBO J. 10: 1469 (1991); Lam and Chua, Science 248: 471 (1991); Stayton et al., Aust. J. Plant. Physiol. 18: 507 (1991)). Plant functional promoters useful for preferential expression in seed plastids include those from plant storage protein genes and from genes involved in fatty acid biosynthesis in oilseeds. Examples of such promoters include the 5' regulatory regions from such genes as napin (Kridl et al., Seed Sci. Res. 1: 209 (1991)), phaseolin, zein, soybean trypsin inhibitor, ACP, stearoyl-ACP desaturase, and oleosin. Seed-specific gene regulation is discussed in EP 0 255 378. Promoter hybrids can also be constructed to enhance transcriptional activity (Comai, L. and Moran, P.M., U.S. Patent No. 5,106,739, issued April 21, 1992), or to combine desired transcriptional activity and tissue specificity.
EXAMPLE 22: Plant transformation and regeneration
A variety of different methods can be employed to introduce such vectors into plant protoplasts, cells, callus tissue, leaf discs, meristems, etcetera, to generate transgenic plants, including Agrobacterium-mediated transformation, particle gun delivery, microinjection, electroporation, polyethylene glycolmediated protoplast transformation, liposome-mediated transformation, etc. (reviewed in Potrykus, Ann. Rev. Plant Physiol. Plant Mol. Biol. 42: 205 (1991)). In general, transgenic plants comprising cells containing and expressing DNAs encoding enzymes facilitating PHA biosynthesis can be produced by transforming plant cells with a DNA construct as described above via any of the foregoing methods; selecting plant cells that have been transformed on a selective medium; regenerating plant cells that have been transformed to produce differentiated plants; and selecting a transformed plant which expresses the enzyme-encoding nucleotide sequence.
Specific methods for transforming a wide variety of dicots and obtaining transgenic plants are well documented in the literature (Gasser and Fraley, Science 244: 1293 (1989); Fisk and Dandekar, Scientia Horticulturae 55: 5 (1993); Christou, Agro Food Industry Hi Tech, p.17 (1994); and the references cited therein).
Successful transformation and plant regeneration have been reported in the monocots as follows: asparagus (Asparagus officinalis; Bytebier et al., Proc. Natl. Acad. Sci. U.S.A. 84: 5345 (1987)); barley (Hordeum vulgarae; Wan and Lemaux, Plant Physiol. 104: 37 (1994)); maize (Zea mays; Rhodes et al., Science 240: 204 (1988); Gordon-Kamm et al., Plant Cell 2: 603 (1990); Fromm et al., Bio/Technology 8: 833 (1990); Koziel et al., Bio/Technology 11 : 194 (1993)); oats (Avena sativa; Somers et al., Bio/Technology 10: 1589 (1992)); orchardgrass (Dactylis glomerata; Horn et al., Plant Cell Rep. 7: 469 (1988)); rice (Oryza sativa, including indica and japonica varieties; Toriyama et al., Bio/Technology 6: 10 (1988); Zhang et al., Plant Cell Rep. 7: 379 (1988); Luo and Wu, Plant Mol. Biol. Rep. 6: 165 (1988); Zhang and Wu, Theor. Appl. Genet. 76: 835 (1988); Christou et al., Bio/Technology 9: 957 (1991)); rye (Secale cereale; De la Pena et al., Nαtwre 325: 274 (1987)); sorghum (Sorghum bicolor; Cassas et al., Proc. Natl. Acad. Sci. USA 90: 11212 (1993)); sugar cane (Saccharum spp.; Bower and Birch, Plant J. 2: 409 (1992)); tall fescue (Festuca arundinacea; Wang et al., Bio/Technology 10: 691 (1992)); turfgrass (Agrostis palustris; Zhong et al., Plant Cell Rep. 13: 1 (1993)); wheat (Triticum aestivum; Vasil et al., Bio/Technology 10: 667 (1992); Weeks et al., Plant Physiol. 102: 1077 (1993); Becker et al., Plant J. 5: 299 (1994)), and alfalfa (Masoud, S.A. et al., Transgen. Res. 5: 313 (1996)). EXAMPLE 23: Host plants
Particularly useful plants for PHA production include those that produce carbon substrates which can be employed for PHA biosynthesis, including tobacco, wheat, potato, Arabidopsis, and high oil seed plants such as corn, soybean, canola, oil seed rape, sunflower, flax, peanut, sugarcane, switchgrass, and alfalfa.
If the host plant of choice does not produce the requisite fatty acid substrates in sufficient quantities, it can be modified, for example by mutagenesis or genetic transformation, to block or modulate the glycerol ester and fatty acid biosynthesis or degradation pathways so that it accumulates the appropriate substrates for PHA production. Expression of enzymes such as acyl-ACP thioesterase, fatty acyl hydroxylase, and yeast multifunctional protein (MFP) may serve to increase the flux of substrates in the peroxisome, leading to higher levels of PHA biosynthesis.
EXAMPLE 24: Nucleic acid mutation and hybridization
Variations in the nucleic acid sequence encoding a fusion protein may lead to mutant protein sequences that display equivalent or superior enzymatic characteristics when compared to the sequences disclosed herein. This invention accordingly encompasses nucleic acid sequences which are similar to the sequences disclosed herein, protein sequences which are similar to the sequences disclosed herein, and the nucleic acid sequences that encode them. Mutations may include deletions, insertions, truncations, substitutions, fusions, and the like.
Mutations to a nucleic acid sequence may be introduced in either a specific or random manner, both of which are well known to those of skill in the art of molecular biology. A myriad of site-directed mutagenesis techniques exist, typically using oligonucleotides to introduce mutations at specific locations in a nucleic acid sequence. Examples include single strand rescue (Kunkel, T. Proc. Natl. Acad. Sci. U.S.A., 82: 488- 492 (1985)), unique site elimination (Deng and Nickloff, Anal. Biochem. 200: 81 (1992)), nick protection (Vandeyar, et al. Gene 65: 129-133 (1988)). and PCR (Costa, et al. Methods Mol. Biol. 57: 31-44 (1996)). Random or non-specific mutations may be generated by chemical agents (for a general review, see Singer and Kusmierek, Ann. Rev. Biochem. 52: 655-693 (1982)) such as nitrosoguanidine (Cerda-Olmedo et al., J. Mol Biol. 33:705-719 (1968); Guerola, et al. Nature New Biol. 230: 122-125 (1971)) and 2-aminopurine (Rogan and Bessman, J. Bacteriol 103: 622-633 (1970)), or by biological methods such as passage through mutator strains (Greener et al. Mol. Biotechnol. 7: 189-195 (1997)).
Nucleic acid hybridization is a technique well known to those of skill in the art of DNA manipulation. The hybridization properties of a given pair of nucleic acids is an indication of their similarity or identity. Mutated nucleic acid sequences may be selected for their similarity to the disclosed nucleic acid sequences on the basis of their hybridization to the disclosed sequences. Low stringency conditions may be used to select sequences with multiple mutations. One may wish to employ conditions such as about 0.15 M to about 0.9 M sodium chloride, at temperatures ranging from about 20°C to about 55°C. High stringency conditions may be used to select for nucleic acid sequences with higher degrees of identity to the disclosed sequences. Conditions employed may include about 0.02 M to about 0.15 M sodium chloride, about 0.5% to about 5% casein, about 0.02% SDS and/or about 0.1% N-laurylsarcosine, about 0.001 M to about 0.03 M sodium citrate, at temperatures between about 50°C and about 70°C. More preferably, high stringency conditions are 0.02 M sodium chloride, 0.5% casein, 0.02% SDS, 0.001 M sodium citrate, at a temperature of 50°C.
EXAMPLE 25: Determination of homologous and degenerate nucleic acid sequences
Modification and changes may be made in the sequence of the proteins of the present invention and the nucleic acid segments which encode them and still obtain a functional molecule that encodes a protein with desirable properties. The following is a discussion based upon changing the amino acid sequence of a protein to create an equivalent, or possibly an improved, second-generation molecule. The amino acid changes may be achieved by changing the codons of the nucleic acid sequence, according to the codons given in Table 1 1.
Table 11 : Codon degeneracies of amino acids
Figure imgf000058_0001
Certain amino acids may be substituted for other amino acids in a protein sequence without appreciable loss of enzymatic activity. It is thus contemplated that various changes may be made in the peptide sequences of the disclosed protein sequences, or their corresponding nucleic acid sequences without appreciable loss of the biological activity.
In making such changes, the hydropathic index of amino acids may be considered. The importance of the hydropathic amino acid index in conferring interactive biological function on a protein is generally understood in the art (Kyte and Doolittle, J. Mol. Biol.,
157: 105-132 (1982)). It is accepted that the relative hydropathic character of the amino acid contributes to the secondary structure of the resultant protein, which in turn defines the interaction of the protein with other molecules, for example, enzymes, substrates, receptors, DNA, antibodies, antigens, and the like.
Each amino acid has been assigned a hydropathic index on the basis of their hydrophobicity and charge characteristics. These are: isoleucine (+4.5); valine (+4.2); s leucine (+3.8); phenylalanine (+2.8); cysteine/cystine (+2.5); methionine (+1.9); alanine (+1.8); glycine (-0.4); threonine (-0.7); serine (-0.8); tryptophan (-0.9); tyrosine (-1.3); proline (-1.6); histidine (-3.2); glutamate/glutamine/aspartate/asparagine (-3.5); lysine (- 3.9); and arginine (-4.5).
It is known in the art that certain amino acids may be substituted by other amino 0 acids having a similar hydropathic index or score and still result in a protein with similar biological activity, i.e., still obtain a biologically functional protein. In making such changes, the substitution of amino acids whose hydropathic indices are within ±2 is preferred, those within ±1 are more preferred, and those within ±0.5 are most preferred.
It is also understood in the art that the substitution of like amino acids may be made s effectively on the basis of hydrophihcity. U.S. Patent No. 4,554,101 (Hopp, T.P., issued November 19, 1985) states that the greatest local average hydrophihcity of a protein, as governed by the hydrophihcity of its adjacent amino acids, correlates with a biological property of the protein. The following hydrophihcity values have been assigned to amino acids: arginine/lysine (+3.0); aspartate/glutamate (+3.0 ±1); serine (+0.3); 0 asparagine/glutamine (+0.2); glycine (0); threonine (-0.4); proline (-0.5 ±1); alanine/histidine (-0.5); cysteine (-1.0); methionine (-1.3); valine (-1.5); leucine/isoleucine (- 1.8); tyrosine (-2.3); phenylalanine (-2.5); and tryptophan (-3.4).
It is understood that an amino acid may be substituted by another amino acid having a similar hydrophihcity score and still result in a protein with similar biological activity, i.e., 5 still obtain a biologically functional protein. In making such changes, the substitution of amino acids whose hydropathic indices are within +2 is preferred, those within ±1 are more preferred, and those within ±0.5 are most preferred. As outlined above, amino acid substitutions are therefore based on the relative similarity of the amino acid side-chain substituents, for example, their hydrophobicity, hydrophihcity, charge, size, and the like. Exemplary substitutions which take various of the foregoing characteristics into consideration are well known to those of skill in the art and include: arginine and lysine; glutamate and aspartate; serine and threonine; glutamine and asparagine; and valine, leucine, and isoleucine. Changes which are not expected to be advantageous may also be used if these resulted in functional fusion proteins.
All of the compositions and/or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this invention have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the methods described herein without departing from the concept, spirit and scope of the invention. More specifically, it will be apparent that certain agents which are both chemically and physiologically related may be substituted for the agents described herein while the same or similar results would be achieved. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the invention.
SEQUENCE LISTING
SEQUENCE LISTING
(1) GENERAL INFORMATION:
( i ) APPLICANT :
(A NAME: VOLKER MITTENDORF (B STREET: Institut de Biologie et Physiologie Vegetales
(c: CITY: Batiment de Biologie (D: STATE : Lausanne
(E: COUNTRY: Switzerland
( F POSTAL CODE (ZIP) : CH-1015
(G; TELEPHONE: (41) (21) 692-4222 (H: TELEFAX: (41) (21) 692-4195
(A NAME: YVES POIRIER (B STREET: Institut de Biologie et Physiologie Vegetales ( C CITY: Batiment de Biologie (D STATE : Lausanne (E COUNTRY: Switzerland ( F POSTAL CODE (ZIP) : CH-1015 (G TELEPHONE: (41) (21) 692-4222 (H TELEFAX: (41) (21) 692-4195
(ii) TITLE OF INVENTION: BIOSYNTHESIS OF MEDIUM CHAIN LENGTH POLYHYDROXYALKANOATES
(iii) NUMBER OF SEQUENCES: 26
(iv) COMPUTER READABLE FORM:
(A) MEDIUM TYPE: Floppy disk
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(C) OPERATING SYSTEM: PC-DOS/MS-DOS
(D) SOFTWARE: Patentln Release #1.0, Version #1.30 (EPO)
(2) INFORMATION FOR SEQ ID NO : 1:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 1677 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS : single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 1:
ATGAGTCAGA AGAACAATAA CGAGCTTCCC AAGCAAGCCG CGGAAAACAC GCTGAACCTG 60
AATCCGGTGA TCGGCATCCG GGGCAAGGAC CTGCTCACCT CCGCGCGCAT GGTCCTGCTC 120
CAGGCGGTGC GCCAGCCGCT GCACAGCGCC AGGCACGTGG CGCATTTCAG CCTGGAGCTG 180 AAGAACGTCC TGCTCGGCCA GTCGGAGCTA CGCCCAGGCG ATGACGACCG ACGCTTTTCC 240
GATCCGGCCT GGAGCCAGAA TCCACTGTAC AAGCGCTACA TGCAGACCTA CCTGGCCTGG 300
CGCAAGGAGC TGCACAGCTG GATCAGCCAC AGCGACCTGT CGCCGCAGGA CATCAGTCGT 360
GGCCAGTTCG TCATCAACCT GCTGACCGAG GCGATGTCGC CGACCAACAG CCTGAGCAAC 420 CCGGCGGCGG TCAAGCGCTT CTTCGAGACC GGCGGCAAGA GCCTGCTGGA CGGCCTCGGC 480
CACCTGGCCA AGGACCTGGT GAACAACGGC GGGATGCCGA GCCAGGTGGA CATGGACGCC 540
TTCGAGGTGG GCAAGAACCT GGCCACCACC GAGGGCGCCG TGGTGTTCCG CAACGACGTG 600
CTGGAACTGA TCCAGTACCG GCCGATCACC GAGTCGGTGC ACGAACGCCC GCTGCTGGTG 660
GTGCCGCCGC AGATCAACAA GTTCTACGTC TTCGACCTGT CGCCGGACAA GAGCCTGGCG 720 CGCTTCTGCC TGCGCAACGG CGTGCAGACC TTCATCGTCA GTTGGCGCAA CCCGACCAAG 780
TCGCAGCGCG AATGGGGCCT GACCACCTAT ATCGAGGCGC TCAAGGAGGC CATCGAGGTA 840
GTCCTGTCGA TCACCGGCAG CAAGGACCTC AACCTCCTCG GCGCCTGCTC CGGCGGGATC 900
ACCACCGCGA CCCTGGTCGG CCACTACGTG GCCAGCGGCG AGAAGAAGGT CAACGCCTTC 960
ACCCAACTGG TCAGCGTGCT CGACTTCGAA CTGAATACCC AGGTCGCGCT GTTCGCCGAC 1020 GAGAAGACTC TGGAGGCCGC CAAGCGTCGT TCCTACCAGT CCGGCGTGCT GGAGGGCAAG 1080
GACATGGCCA AGGTGTTCGC CTGGATGCGC CCCAACGACC TGATCTGGAA CTACTGGGTC 1140
AACAACTACC TGCTCGGCAA CCAGCCGCCG GCGTTCGACA TCCTCTACTG GAACAACGAC 1200
ACCACGCGCC TGCCCGCCGC GCTGCACGGC GAGTTCGTCG AACTGTTCAA GAGCAACCCG 1260
CTGAACCGCC CCGGCGCCCT GGAGGTCTCC GGCACGCCCA TCGACCTGAA GCAGGTGACT 1320 TGCGACTTCT ACTGTGTCGC CGGTCTGAAC GACCACATCA CCCCCTGGGA GTCGTGCTAC 1380
AAGTCGGCCA GGCTGCTGGG TGGCAAGTGC GAGTTCATCC TCTCCAACAG CGGTCACATC 1440
CAGAGCATCC TCAACCCACC GGGCAACCCC AAGGCACGCT TCATGACCAA TCCGGAACTG 1500
CCCGCCGAGC CCAAGGCCTG GCTGGAACAG GCCGGCAAGC ACGCCGACTC GTGGTGGTTG 1560
CACTGGCAGC AATGGCTGGC CGAACGCTCC GGCAAGACCC GCAAGGCGCC CGCCAGCCTG 1620 GGCAACAAGA CCTATCCGGC CGGCGAAGCC GCGCCCGGAA CCTACGTGCA TGAACGA 1677
(2) INFORMATION FOR SEQ ID NO: 2:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 559 amino acids
(B) TYPE: amino acid (C) STRANDEDNESS :
(D) TOPOLOGY: linear (xi) SEQUENCE DESCRIPTION: SEQ ID NO : 2:
Met Ser Gin Lys Asn Asn Asn Glu Leu Pro Lys Gin Ala Ala Glu Asn 1 5 10 15
Thr Leu Asn Leu Asn Pro Val lie Gly lie Arg Gly Lys Asp Leu Leu 20 25 30
Thr Ser Ala Arg Met Val Leu Leu Gin Ala Val Arg Gin Pro Leu His 35 40 45
Ser Ala Arg His Val Ala His Phe Ser Leu Glu Leu Lys Asn Val Leu 50 55 60
Leu Gly Gin Ser Glu Leu Arg Pro Gly Asp Asp Asp Arg Arg Phe Ser 65 70 75 80 Asp Pro Ala Trp Ser Gin Asn Pro Leu Tyr Lys Arg Tyr Met Gin Thr
85 90 95
Tyr Leu Ala Trp Arg Lys Glu Leu His Ser Trp lie Ser His Ser Asp 100 105 110
Leu Ser Pro Gin Asp lie Ser Arg Gly Gin Phe Val lie Asn Leu Leu 115 120 125
Thr Glu Ala Met Ser Pro Thr Asn Ser Leu Ser Asn Pro Ala Ala Val 130 135 140
Lys Arg Phe Phe Glu Thr Gly Gly Lys Ser Leu Leu Asp Gly Leu Gly 145 150 155 160 His Leu Ala Lys Asp Leu Val Asn Asn Gly Gly Met Pro Ser Gin Val
165 170 175
Asp Met Asp Ala Phe Glu Val Gly Lys Asn Leu Ala Thr Thr Glu Gly 180 185 190
Ala Val Val Phe Arg Asn Asp Val Leu Glu Leu lie Gin Tyr Arg Pro 195 200 205 lie Thr Glu Ser Val His Glu Arg Pro Leu Leu Val Val Pro Pro Gin 210 215 220 lie Asn Lys Phe Tyr Val Phe Asp Leu Ser Pro Asp Lys Ser Leu Ala 225 230 235 240 Arg Phe Cys Leu Arg Asn Gly Val Gin Thr Phe lie Val Ser Trp Arg
245 250 255
Asn Pro Thr Lys Ser Gin Arg Glu Trp Gly Leu Thr Thr Tyr lie Glu 260 265 270
Ala Leu Lys Glu Ala lie Glu Val Val Leu Ser lie Thr Gly Ser Lys 275 280 285
Asp Leu Asn Leu Leu Gly Ala Cys Ser Gly Gly lie Thr Thr Ala Thr 290 295 300
Leu Val Gly His Tyr Val Ala Ser Gly Glu Lys Lys Val Asn Ala Phe 305 310 315 320
Thr Gin Leu Val Ser Val Leu Asp Phe Glu Leu Asn Thr Gin Val Ala 325 330 335
Leu Phe Ala Asp Glu Lys Thr Leu Glu Ala Ala Lys Arg Arg Ser Tyr 340 345 350 Gin Ser Gly Val Leu Glu Gly Lys Asp Met Ala Lys Val Phe Ala Trp 355 360 365
Met Arg Pro Asn Asp Leu lie Trp Asn Tyr Trp Val Asn Asn Tyr Leu 370 375 380
Leu Gly Asn Gin Pro Pro Ala Phe Asp lie Leu Tyr Trp Asn Asn Asp 385 390 395 400
Thr Thr Arg Leu Pro Ala Ala Leu His Gly Glu Phe Val Glu Leu Phe 405 410 415
Lys Ser Asn Pro Leu Asn Arg Pro Gly Ala Leu Glu Val Ser Gly Thr 420 425 430 Pro lie Asp Leu Lys Gin Val Thr Cys Asp Phe Tyr Cys Val Ala Gly 435 440 445
Leu Asn Asp His lie Thr Pro Trp Glu Ser Cys Tyr Lys Ser Ala Arg 450 455 460
Leu Leu Gly Gly Lys Cys Glu Phe lie Leu Ser Asn Ser Gly His lie 465 470 475 480
Gin Ser lie Leu Asn Pro Pro Gly Asn Pro Lys Ala Arg Phe Met Thr 485 490 495
Asn Pro Glu Leu Pro Ala Glu Pro Lys Ala Trp Leu Glu Gin Ala Gly 500 505 510 Lys His Ala Asp Ser Trp Trp Leu His Trp Gin Gin Trp Leu Ala Glu 515 520 525
Arg Ser Gly Lys Thr Arg Lys Ala Pro Ala Ser Leu Gly Asn Lys Thr 530 535 540
Tyr Pro Ala Gly Glu Ala Ala Pro Gly Thr Tyr Val His Glu Arg 545 550 555
(2) INFORMATION FOR SEQ ID NO: 3:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1680 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 3:
ATGCGAGAAA AGCAGGAATC GGGTAGCGTG CCGGTGCCCG CCGAGTTCAT GAGTGCACAG 60
AGCGCCATCG TCGGCCTGCG CGGCAAGGAC CTGCTGACGA CGGTCCGCAG CCTGGCTGTC 120
CACGGCCTGC GCCAGCCGCT GCACAGTGCG CGGCACCTGG TCGCCTTCGG AGGCCAGTTG 180
GGCAAGGTGC TGCTGGGCGA CACCCTGCAC CAGCCGAACC CACAGGACGC CCGCTTCCAG 240 GATCCATCCT GGCGCCTCAA TCCCTTCTAC CGGCGCACCC TGCAGGCCTA CCTGGCGTGG 300
CAGAAACAAC TGCTCGCCTG GATCGACGAA AGCAACCTGG ACTGCGACGA TCGCGCCCGC 360
GCCCGCTTCC TCGTCGCCTT GCTCTCCGAC GCCGTGGCAC CCAGCAACAG CCTGATCAAT 420
CCACTGGCGT TAAAGGAACT GTTCAATACC GGCGGGATCA GCCTGCTCAA TGGCGTCCGC 480
CACCTGCTCG AAGACCTGGT GCACAACGGC GGCATGCCCA GCCAGGTGAA CAAGACCGCC 540 TTCGAGATCG GTCGCAACCT CGCCACCACG CAAGGCGCGG TGGTGTTCCG CAACGAGGTG 600
CTGGAGCTGA TCCAGTACAA GCCGCTGGGC GAGCGCCAGT ACGCCAAGCC CCTGCTGATC 660
GTGCCGCCGC AGATCAACAA GTACTACATC TTCGACCTGT CGCCGGAAAA GAGCTTCGTC 720
CAGTACGCCC TGAAGAACAA CCTGCAGGTC TTCGTCATCA GTTGGCGCAA CCCCGACGCC 780
CAGCACCGCG AATGGGGCCT GAGCACCTAT GTCGAGGCCC TCGACCAGGC CATCGAGGTC 840 AGCCGCGAGA TCACCGGCAG CCGCAGCGTG AACCTGGCCG GCGCCTGCGC CGGCGGGCTC 900
ACCGTAGCCG CCTTGCTCGG CCACCTGCAG GTGCGCCGGC AACTGCGCAA GGTCAGTAGC 960
GTCACCTACC TGGTCAGCCT GCTCGACAGC CAGATGGAAA GCCCGGCGAT GCTCTTCGCC 1020
GACGAGCAGA CCCTGGAGAG CAGCAAGCGC CGCTCCTACC AGCATGGCGT GCTGGACGGG 1080
CGCGACATGG CCAAGGTGTT CGCCTGGATG CGCCCCAACG ACCTGATCTG GAACTACTGG 1140 GTCAACAACT ACCTGCTCGG CAGGCAGCCG CCGGCGTTCG ACATCCTCTA CTGGAACAAC 1200
GACAACACGC GGCTGCCCGC GGCGTTCCAC GGCGAACTGC TCGACCTGTT CAAGCACAAC 1260
CCGCTGACCC GCCCGGGCGC GCTGGAGGTC AGCGGGACCG CGGTGGACCT GGGCAAGGTG 1320
GCGATCGACA GCTTCCACGT CGCCGGCATC ACCGACCACA TCACGCCCTG GGACGCGGTG 1380 TATCGCTCGG CCCTCCTGCT GGGCGGCCAG CGCCGCTTCA TCCTGTCCAA CAGCGGGCAC 1440
ATCCAGAGCA TCCTCAACCC TCCCGGAAAC CCCAAGGCCT GCTACTTCGA GAACGACAAG 1500
CTGAGCAGCG ATCCACGCGC CTGGTACTAC GACGCCAAGC GCGAAGAGGG CAGCTGGTGG 1560
CCGGTCTGGC TGGGCTGGCT GCAGGAGCGC TCGGGCGAGC TGGGCAACCC TGACTTCAAC 1620 CTTGGCAGCG CCGCGCATCC GCCCCTCGAA GCGGCCCCGG GCACCTACGT GCATATACGC 1680
(2) INFORMATION FOR SEQ ID NO : 4: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 560 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS:
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 4:
Met Arg Glu Lys Gin Glu Ser Gly Ser Val Pro Val Pro Ala Glu Phe 1 5 10 15 Met Ser Ala Gin Ser Ala lie Val Gly Leu Arg Gly Lys Asp Leu Leu
20 25 30
Thr Thr Val Arg Ser Leu Ala Val His Gly Leu Arg Gin Pro Leu His 35 40 45
Ser Ala Arg His Leu Val Ala Phe Gly Gly Gin Leu Gly Lys Val Leu 50 55 60
Leu Gly Asp Thr Leu His Gin Pro Asn Pro Gin Asp Ala Arg Phe Gin 65 70 75 80
Asp Pro Ser Trp Arg Leu Asn Pro Phe Tyr Arg Arg Thr Leu Gin Ala 85 90 95 Tyr Leu Ala Trp Gin Lys Gin Leu Leu Ala Trp lie Asp Glu Ser Asn
100 105 110
Leu Asp Cys Asp Asp Arg Ala Arg Ala Arg Phe Leu Val Ala Leu Leu 115 120 125
Ser Asp Ala Val Ala Pro Ser Asn Ser Leu lie Asn Pro Leu Ala Leu 130 135 140
Lys Glu Leu Phe Asn Thr Gly Gly lie Ser Leu Leu Asn Gly Val Arg 145 150 155 160 His Leu Leu Glu Asp Leu Val His Asn Gly Gly Met Pro Ser Gin Val 165 170 175 ys Thr Ala Phe Glu lie Gly Arg Asn Leu Ala Thr Thr Gin Gly 180 185 190
Ala Val Val Phe Arg Asn Glu Val Leu Glu Leu lie Gin Tyr Lys Pro 195 200 205 Leu Gly Glu Arg Gin Tyr Ala Lys Pro Leu Leu lie Val Pro Pro Gin 210 215 220 lie Asn Lys Tyr Tyr lie Phe Asp Leu Ser Pro Glu Lys Ser Phe Val 225 230 235 240
Gin Tyr Ala Leu Lys Asn Asn Leu Gin Val Phe Val lie Ser Trp Arg 245 250 255
Asn Pro Asp Ala Gin His Arg Glu Trp Gly Leu Ser Thr Tyr Val Glu 260 265 270
Ala Leu Asp Gin Ala lie Glu Val Ser Arg Glu lie Thr Gly Ser Arg 275 280 285 Ser Val Asn Leu Ala Gly Ala Cys Ala Gly Gly Leu Thr Val Ala Ala 290 295 300
Leu Leu Gly His Leu Gin Val Arg Arg Gin Leu Arg Lys Val Ser Ser 305 310 315 320
Val Thr Tyr Leu Val Ser Leu Leu Asp Ser Gin Met Glu Ser Pro Ala 325 330 335
Met Leu Phe Ala Asp Glu Gin Thr Leu Glu Ser Ser Lys Arg Arg Ser 340 345 350
Tyr Gin His Gly Val Leu Asp Gly Arg Asp Met Ala Lys Val Phe Ala 355 360 365 Trp Met Arg Pro Asn Asp Leu lie Trp Asn Tyr Trp Val Asn Asn Tyr 370 375 380
Leu Leu Gly Arg Gin Pro Pro Ala Phe Asp lie Leu Tyr Trp Asn Asn 385 390 395 400
Asp Asn Thr Arg Leu Pro Ala Ala Phe His Gly Glu Leu Leu Asp Leu 405 410 415
Phe Lys His Asn Pro Leu Thr Arg Pro Gly Ala Leu Glu Val Ser Gly 420 425 430
Thr Ala Val Asp Leu Gly Lys Val Ala lie Asp Ser Phe His Val Ala 435 440 445 Gly lie Thr Asp His lie Thr Pro Trp Asp Ala Val Tyr Arg Ser Ala 450 455 460 Leu Leu Leu Gly Gly Gin Arg Arg Phe lie Leu Ser Asn Ser Gly His 465 470 475 480 lie Gin Ser lie Leu Asn Pro Pro Gly Asn Pro Lys Ala Cys Tyr Phe 485 490 495
Glu Asn Asp Lys Leu Ser Ser Asp Pro Arg Ala Trp Tyr Tyr Asp Ala 500 505 510
Lys Arg Glu Glu Gly Ser Trp Trp Pro Val Trp Leu Gly Trp Leu Gin 515 520 525
Glu Arg Ser Gly Glu Leu Gly Asn Pro Asp Phe Asn Leu Gly Ser Ala 530 535 540
Ala His Pro Pro Leu Glu Ala Ala Pro Gly Thr Tyr Val His lie Arg 545 550 555 560
(2) INFORMATION FOR SEQ ID NO : 5:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 29 base pairs (B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 5: GGAGAATTCC CGATGAGCCA GAAGAACAA 29
(2) INFORMATION FOR SEQ ID NO : 6:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 29 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 6: CTGGAAGCTT TTGATCGTTC ATGCACGTA 29
(2) INFORMATION FOR SEQ ID NO: 7: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 29 base pairs (B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 7: GTGGAATTCA TGCGTGAAAA GCAGGAATC 29 (2) INFORMATION FOR SEQ ID NO: 8:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 29 base pairs
(B) TYPE: nucleic acid (C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 8: GGCCAAGCTT TTGAGCGTAT ATGCACGTA 29
(2) INFORMATION FOR SEQ ID NO : 9:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 1731 base pairs (B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 9: ATGGCTGCAT CTTTCTCTGT CCCCTCTATG ATCATGGAAG AGGAAGGGAG ATTTGAGGCG 60
GAAGTTGCGG AAGTGCAGAC TTGGTGGAGC TCAGAGAGGT TCAAGCTAAC AAGGCGTCCT 120
TACACGGCCC GTGACGTGGT GGCTCTACGT GGTCATCTCA AGCAAGGTTA TGCTTCGAAC 180
GAGATGGCTA AGAAGCTGTG GAGAACGCTC AAGAGTCACC AAGTCAACGG CACGGCGTCT 240
CGCACGTTTG GTGCCTTGGA CCCTGTTCAG GTGACAATGA TGGCTAAACA TTTAGACACC 300 ATTTATGTCT CTGGTTGGCA GTGCTCGTCT ACTCACACCT CCACTAACGA GCCTGGTCCG 360
GATCTTGCTG ACTATCCATA CGATACCGTT CCTAACAAGG TCGAACATCT CTTCTTCGCT 420
CAGCAGTACC ATGACAGAAA ACAGAGGGAG GCGAGAATGA GCATGAGCAG AGAAGAAAGA 480
GCAAAAACTC CGTTTGTGGA CTACTTGAAG CCCATCATCG CCGACGGAGG AACCGGCTTC 540 GGCGGTACCA CTGCCACCGT AAAACTCTGC AAACTCTTCG TTGAAAGAGG AGCCGCTGGG 600
GTCCACATCG AGGACCAGTC CTCCGTCACC AAGAAGTGTG GCCACATGGC CGGAAAAGTC 660
CTCGTGGCAG TCAGTGAACA CATCAACCGC CTTGTTGCGG CTCGGCTCCA GTTCGACGTG 720
ATGGGCACAG AGACCGTCCT GGTCGCTAGA ACGGACGCGG TCGCGCCCAC TCTGATCCAA 780 TCGAACATTG ACTCAAGGGA CCACCAGTTC ATCCTCGGTG TCACTAACCC AAACCTTAGA 840
GGCAAGAGTT TGTCCTCGCT TCTGGCCGAG GGAATGGCTG TAGGCAATAA TGGTCCAGCG 900
TTGCAAGCGA TTGAGGATCA ATGGCTTAGC TCAGCTCGTC TCATGACTTT CTCGGACGCT 960
GTCGTGGAGG CTCTCAAGCG CATGAACCTA AGTGAGAATG AGAAGAGCCG GAGAGTGACC 1020
GAGTGGCTAA TCCATGCAAG GTACGAGAAC TGCCTTTCAA ACGAGCAAGG CCGAGAATTA 1080 GCAGCAAAAC TCGGTGTGAC TGATCTTTTC TGGGACTGGG ACTTGCCCAG AACCAGAGAA 1140
GGATTCTACC GGTTCCAAGG CTCGGTCACA GCAGCCGTGG TCCGTGGCTG GGCCTTTGCA 1200
CAGATAGCTG ATCTCATCTG GATGGAAACC GCAAGCCCTG ACCTCAACGA ATGCACCCAA 1260
TTCGCAGAAG GAGTCAAGTC CAAGACACCA GAGGTAATGC TCGCCTACAA CCTCTCCCCA 1320
TCCTTCAACT GGGACGCTTC TGGTATGACG GATCAGCAGA TGATGGAGTT CATTCCACGA 1380 ATCGCCAGGC TCGGTTATTG CTGGCAGTTT ATAACCCTTG CGGGTTTCCA TGCGGATGCT 1440
CTTGTGGTCG ATACGTTTGC AAAGGATTAC GCGAGGAGAG GGATGCTGGC TTATGTCGAG 1500
AGGATACAGA GAGAAGAGAG GAGCAATGGG GTTGACACAT TGGCTCATCA GAAATGGTCA 1560
GGTGCTAATT ACTATGATCG TTATCTTAAG ACCGTCCAAG GTGGAATCTC CTCCACTGCA 1620
GCCATGGGCA AAGGTGTTAC CGAGGAACAA TTCAAAGAGA CCTGGACGAG GCCGGGAGCT 1680 GCTGGAATGG GCGAAGGGAC TAGCCTTGTG GTGGCCAAGT CCAGAATGTA A 1731
(2) INFORMATION FOR SEQ ID NO: 10:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 576 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS:
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 10:
Met Ala Ala Ser Phe Ser Val Pro Ser Met lie Met Glu Glu Glu Gly 1 5 10 15
Arg Phe Glu Ala Glu Val Ala Glu Val Gin Thr Trp Trp Ser Ser Glu 20 25 30
Arg Phe Lys Leu Thr Arg Arg Pro Tyr Thr Ala Arg Asp Val Val Ala 35 40 45
Leu Arg Gly His Leu Lys Gin Gly Tyr Ala Ser Asn Glu Met Ala Lys 50 55 60
Lys Leu Trp Arg Thr Leu Lys Ser His Gin Val Asn Gly Thr Ala Ser 65 70 75 80 Arg Thr Phe Gly Ala Leu Asp Pro Val Gin Val Thr Met Met Ala Lys
85 90 95
His Leu Asp Thr lie Tyr Val Ser Gly Trp Gin Cys Ser Ser Thr His 100 105 110
Thr Ser Thr Asn Glu Pro Gly Pro Asp Leu Ala Asp Tyr Pro Tyr Asp 115 120 125
Thr Val Pro Asn Lys Val Glu His Leu Phe Phe Ala Gin Gin Tyr His 130 135 140
Asp Arg Lys Gin Arg Glu Ala Arg Met Ser Met Ser Arg Glu Glu Arg 145 150 155 160 Ala Lys Thr Pro Phe Val Asp Tyr Leu Lys Pro lie lie Ala Asp Gly
165 170 175
Gly Thr Gly Phe Gly Gly Thr Thr Ala Thr Val Lys Leu Cys Lys Leu 180 185 190
Phe Val Glu Arg Gly Ala Ala Gly Val His lie Glu Asp Gin Ser Ser 195 200 205
Val Thr Lys Lys Cys Gly His Met Ala Gly Lys Val Leu Val Ala Val 210 215 220
Ser Glu His lie Asn Arg Leu Val Ala Ala Arg Leu Gin Phe Asp Val 225 230 235 240 Met Gly Thr Glu Thr Val Leu Val Ala Arg Thr Asp Ala Val Ala Pro
245 250 255
Thr Leu lie Gin Ser Asn lie Asp Ser Arg Asp His Gin Phe lie Leu 260 265 270
Gly Val Thr Asn Pro Asn Leu Arg Gly Lys Ser Leu Ser Ser Leu Leu 275 280 285
Ala Glu Gly Met Ala Val Gly Asn Asn Gly Pro Ala Leu Gin Ala lie 290 295 300 Glu Asp Gin Trp Leu Ser Ser Ala Arg Leu Met Thr Phe Ser Asp Ala 305 310 315 320
Val Val Glu Ala Leu Lys Arg Met Asn Leu Ser Glu Asn Glu Lys Ser 325 330 335
Arg Arg Val Thr Glu Trp Leu lie His Ala Arg Tyr Glu Asn Cys Leu 340 345 350 Ser Asn Glu Gin Gly Arg Glu Leu Ala Ala Lys Leu Gly Val Thr Asp 355 360 365
Leu Phe Trp Asp Trp Asp Leu Pro Arg Thr Arg Glu Gly Phe Tyr Arg 370 375 380
Phe Gin Gly Ser Val Thr Ala Ala Val Val Arg Gly Trp Ala Phe Ala 385 390 395 400
Gin lie Ala Asp Leu lie Trp Met Glu Thr Ala Ser Pro Asp Leu Asn 405 410 415
Glu Cys Thr Gin Phe Ala Glu Gly Val Lys Ser Lys Thr Pro Glu Val 420 425 430 Met Leu Ala Tyr Asn Leu Ser Pro Ser Phe Asn Trp Asp Ala Ser Gly 435 440 445
Met Thr Asp Gin Gin Met Met Glu Phe lie Pro Arg lie Ala Arg Leu 450 455 460
Gly Tyr Cys Trp Gin Phe lie Thr Leu Ala Gly Phe His Ala Asp Ala 465 470 475 480
Leu Val Val Asp Thr Phe Ala Lys Asp Tyr Ala Arg Arg Gly Met Leu 485 490 495
Ala Tyr Val Glu Arg lie Gin Arg Glu Glu Arg Ser Asn Gly Val Asp 500 505 510 Thr Leu Ala His Gin Lys Trp Ser Gly Ala Asn Tyr Tyr Asp Arg Tyr 515 520 525
Leu Lys Thr Val Gin Gly Gly lie Ser Ser Thr Ala Ala Met Gly Lys 530 535 540
Gly Val Thr Glu Glu Gin Phe Lys Glu Thr Trp Thr Arg Pro Gly Ala 545 550 555 560
Ala Gly Met Gly Glu Gly Thr Ser Leu Val Val Ala Lys Ser Arg Met 565 570 575
(2) INFORMATION FOR SEQ ID NO: 11: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 26 base pairs (B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 11:
ACTGAAGCTT TGGGCAAAGG TGTTAC 26
(2) INFORMATION FOR SEQ ID NO: 12: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 28 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 12:
GTGGTCTAGA AGTTTTTCTG CGAAGATG 28
(2) INFORMATION FOR SEQ ID NO: 13:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 102 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single (D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 13:
GGCAAAGGTG TTACCGAGGA ACAATTCAAA GAGACCTGGA CGAGGCCGGG AGCTGCTGGA 60 ATGGGCGAAG GGACTAGCCT TGTGGTGGCC AAGTCCAGAA TG 102
(2) INFORMATION FOR SEQ ID NO: 14:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 34 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS:
(D) TOPOLOGY: linear (xi) SEQUENCE DESCRIPTION : SEQ ID NO : 14 :
Gly Lys Gly Val Thr Glu Glu Gin Phe Lys Glu Thr Trp Thr Arg Pro 1 5 10 15
Gly Ala Ala Gly Met Gly Glu Gly Thr Ser Leu Val Val Ala Lys Ser 20 25 30
Arg Met
(2) INFORMATION FOR SEQ ID NO: 15: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 1677 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 15:
ATGAGCCAGA AGAACAATAA CGAGCTTCCC AAGCAAGCCG CGGAAAACAC GCTGAACCTG 60
AATCCGGTGA TCGGCATCCG GGGCAAGGAC CTGCTCACCT CCGCGCGCAT GGTCCTGCTC 120
CAGGCGGTGC GCCAGCCGCT GCACAGCGCC AGGCACGTGG CGCATTTCAG CCTGGAGCTG 180
AAGAACGTCC TGCTCGGCCA GTCGGAGCTA CGCCCAGGCG ATGACGACCG ACGCTTTTCC 240 GATCCGGCCT GGAGCCAGAA TCCACTGTAC AAGCGCTACA TGCAGACCTA CCTGGCCTGG 300
CGCAAGGAGC TGCACAGCTG GATCAGCCAC AGCGACCTGT CGCCGCAGGA CATCAGTCGT 360
GGCCAGTTCG TCATCAACCT GCTGACCGAG GCGATGTCGC CGACCAACAG CCTGAGCAAC 420
CCGGCGGCGG TCAAGCGCTT CTTCGAGACC GGCGGCAAGA GCCTGCTGGA CGGCCTCGGC 480
CACCTGGCCA AGGACCTGGT GAACAACGGC GGGATGCCGA GCCAGGTGGA CATGGACGCC 540 TTCGAGGTGG GCAAGAACCT GGCCACCACC GAGGGCGCCG TGGTGTTCCG CAACGACGTG 600
CTGGAACTGA TCCAGTACCG GCCGATCACC GAGTCGGTGC ACGAACGCCC GCTGCTGGTG 660
GTGCCGCCGC AGATCAACAA GTTCTACGTC TTCGACCTGT CGCCGGACAA GAGCCTGGCG 720
CGCTTCTGCC TGCGCAACGG CGTGCAGACC TTCATCGTCA GTTGGCGCAA CCCGACCAAG 780
TCGCAGCGCG AATGGGGCCT GACCACCTAT ATCGAGGCGC TCAAGGAGGC CATCGAGGTA 840 GTCCTGTCGA TCACCGGCAG CAAGGACCTC AACCTCCTCG GCGCCTGCTC CGGCGGGATC 900 ACCACCGCGA CCCTGGTCGG CCACTACGTG GCCAGCGGCG AGAAGAAGGT CAACGCCTTC 960
ACCCAACTGG TCAGCGTGCT CGACTTCGAA CTGAATACCC AGGTCGCGCT GTTCGCCGAC 1020
GAGAAGACTC TGGAGGCCGC CAAGCGTCGT TCCTACCAGT CCGGCGTGCT GGAGGGCAAG 1080
GACATGGCCA AGGTGTTCGC CTGGATGCGC CCCAACGACC TGATCTGGAA CTACTGGGTC 1140
AACAACTACC TGCTCGGCAA CCAGCCGCCG GCGTTCGACA TCCTCTACTG GAACAACGAC 1200
ACCACGCGCC TGCCCGCCGC GCTGCACGGC GAGTTCGTCG AACTGTTCAA GAGCAACCCG 1260
CTGAACCGCC CCGGCGCCCT GGAGGTCTCC GGCACGCCCA TCGACCTGAA GCAGGTGACT 1320 TGCGACTTCT ACTGTGTCGC CGGTCTGAAC GACCACATCA CCCCCTGGGA GTCGTGCTAC 1380
AAGTCGGCCA GGCTGCTGGG TGGCAAGTGC GAGTTCATCC TCTCCAACAG CGGTCACATC 1440
CAGAGCATCC TCAACCCACC GGGCAACCCC AAGGCACGCT TCATGACCAA TCCGGAACTG 1500
CCCGCCGAGC CCAAGGCCTG GCTGGAACAG GCCGGCAAGC ACGCCGACTC GTGGTGGTTG 1560
CACTGGCAGC AATGGCTGGC CGAACGCTCC GGCAAGACCC GCAAGGCGCC CGCCAGCCTG 1620 GGCAACAAGA CCTATCCGGC CGGCGAAGCC GCGCCCGGAA CCTACGTGCA TGAACGA 1677
(2) INFORMATION FOR SEQ ID NO: 16:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1680 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 16:
ATGCGTGAAA AGCAGGAATC GGGTAGCGTG CCGGTGCCCG CCGAGTTCAT GAGTGCACAG 60
AGCGCCATCG TCGGCCTGCG CGGCAAGGAC CTGCTGACGA CGGTCCGCAG CCTGGCTGTC 120 CACGGCCTGC GCCAGCCGCT GCACAGTGCG CGGCACCTGG TCGCCTTCGG AGGCCAGTTG 180
GGCAAGGTGC TGCTGGGCGA CACCCTGCAC CAGCCGAACC CACAGGACGC CCGCTTCCAG 240
GATCCATCCT GGCGCCTCAA TCCCTTCTAC CGGCGCACCC TGCAGGCCTA CCTGGCGTGG 300
CAGAAACAAC TGCTCGCCTG GATCGACGAA AGCAACCTGG ACTGCGACGA TCGCGCCCGC 360
GCCCGCTTCC TCGTCGCCTT GCTCTCCGAC GCCGTGGCAC CCAGCAACAG CCTGATCAAT 420 CCACTGGCGT TAAAGGAACT GTTCAATACC GGCGGGATCA GCCTGCTCAA TGGCGTCCGC 480 CACCTGCTCG AAGACCTGGT GCACAACGGC GGCATGCCCA GCCAGGTGAA CAAGACCGCC 540
TTCGAGATCG GTCGCAACCT CGCCACCACG CAAGGCGCGG TGGTGTTCCG CAACGAGGTG 600
CTGGAGCTGA TCCAGTACAA GCCGCTGGGC GAGCGCCAGT ACGCCAAGCC CCTGCTGATC 660
GTGCCGCCGC AGATCAACAA GTACTACATC TTCGACCTGT CGCCGGAAAA GAGCTTCGTC 720
CAGTACGCCC TGAAGAACAA CCTGCAGGTC TTCGTCATCA GTTGGCGCAA CCCCGACGCC 780
CAGCACCGCG AATGGGGCCT GAGCACCTAT GTCGAGGCCC TCGACCAGGC CATCGAGGTC 840
AGCCGCGAGA TCACCGGCAG CCGCAGCGTG AACCTGGCCG GCGCCTGCGC CGGCGGGCTC 900 ACCGTAGCCG CCTTGCTCGG CCACCTGCAG GTGCGCCGGC AACTGCGCAA GGTCAGTAGC 960
GTCACCTACC TGGTCAGCCT GCTCGACAGC CAGATGGAAA GCCCGGCGAT GCTCTTCGCC 1020
GACGAGCAGA CCCTGGAGAG CAGCAAGCGC CGCTCCTACC AGCATGGCGT GCTGGACGGG 1080
CGCGACATGG CCAAGGTGTT CGCCTGGATG CGCCCCAACG ACCTGATCTG GAACTACTGG 1140
GTCAACAACT ACCTGCTCGG CAGGCAGCCG CCGGCGTTCG ACATCCTCTA CTGGAACAAC 1200 GACAACACGC GGCTGCCCGC GGCGTTCCAC GGCGAACTGC TCGACCTGTT CAAGCACAAC 1260
CCGCTGACCC GCCCGGGCGC GCTGGAGGTC AGCGGGACCG CGGTGGACCT GGGCAAGGTG 1320
GCGATCGACA GCTTCCACGT CGCCGGCATC ACCGACCACA TCACGCCCTG GGACGCGGTG 1380
TATCGCTCGG CCCTCCTGCT GGGCGGCCAG CGCCGCTTCA TCCTGTCCAA CAGCGGGCAC 1440
ATCCAGAGCA TCCTCAACCC TCCCGGAAAC CCCAAGGCCT GCTACTTCGA GAACGACAAG 1500 CTGAGCAGCG ATCCACGCGC CTGGTACTAC GACGCCAAGC GCGAAGAGGG CAGCTGGTGG 1560
CCGGTCTGGC TGGGCTGGCT GCAGGAGCGC TCGGGCGAGC TGGGCAACCC TGACTTCAAC 1620
CTTGGCAGCG CCGCGCATCC GCCCCTCGAA GCGGCCCCGG GCACCTACGT GCATATACGC 1680
(2) INFORMATION FOR SEQ ID NO: 17:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1791 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 17: ATGAGCCAGA AGAACAATAA CGAGCTTCCC AAGCAAGCCG CGGAAAACAC GCTGAACCTG 60 AATCCGGTGA TCGGCATCCG GGGCAAGGAC CTGCTCACCT CCGCGCGCAT GGTCCTGCTC 120
CAGGCGGTGC GCCAGCCGCT GCACAGCGCC AGGCACGTGG CGCATTTCAG CCTGGAGCTG 180
AAGAACGTCC TGCTCGGCCA GTCGGAGCTA CGCCCAGGCG ATGACGACCG ACGCTTTTCC 240
GATCCGGCCT GGAGCCAGAA TCCACTGTAC AAGCGCTACA TGCAGACCTA CCTGGCCTGG 300 CGCAAGGAGC TGCACAGCTG GATCAGCCAC AGCGACCTGT CGCCGCAGGA CATCAGTCGT 360
GGCCAGTTCG TCATCAACCT GCTGACCGAG GCGATGTCGC CGACCAACAG CCTGAGCAAC 420
CCGGCGGCGG TCAAGCGCTT CTTCGAGACC GGCGGCAAGA GCCTGCTGGA CGGCCTCGGC 480
CACCTGGCCA AGGACCTGGT GAACAACGGC GGGATGCCGA GCCAGGTGGA CATGGACGCC 540
TTCGAGGTGG GCAAGAACCT GGCCACCACC GAGGGCGCCG TGGTGTTCCG CAACGACGTG 600 CTGGAACTGA TCCAGTACCG GCCGATCACC GAGTCGGTGC ACGAACGCCC GCTGCTGGTG 660
GTGCCGCCGC AGATCAACAA GTTCTACGTC TTCGACCTGT CGCCGGACAA GAGCCTGGCG 720
CGCTTCTGCC TGCGCAACGG CGTGCAGACC TTCATCGTCA GTTGGCGCAA CCCGACCAAG 780
TCGCAGCGCG AATGGGGCCT GACCACCTAT ATCGAGGCGC TCAAGGAGGC CATCGAGGTA 840
GTCCTGTCGA TCACCGGCAG CAAGGACCTC AACCTCCTCG GCGCCTGCTC CGGCGGGATC 900 ACCACCGCGA CCCTGGTCGG CCACTACGTG GCCAGCGGCG AGAAGAAGGT CAACGCCTTC 960
ACCCAACTGG TCAGCGTGCT CGACTTCGAA CTGAATACCC AGGTCGCGCT GTTCGCCGAC 1020
GAGAAGACTC TGGAGGCCGC CAAGCGTCGT TCCTACCAGT CCGGCGTGCT GGAGGGCAAG 1080
GACATGGCCA AGGTGTTCGC CTGGATGCGC CCCAACGACC TGATCTGGAA CTACTGGGTC 1140
AACAACTACC TGCTCGGCAA CCAGCCGCCG GCGTTCGACA TCCTCTACTG GAACAACGAC 1200 ACCACGCGCC TGCCCGCCGC GCTGCACGGC GAGTTCGTCG AACTGTTCAA GAGCAACCCG 1260
CTGAACCGCC CCGGCGCCCT GGAGGTCTCC GGCACGCCCA TCGACCTGAA GCAGGTGACT 1320
TGCGACTTCT ACTGTGTCGC CGGTCTGAAC GACCACATCA CCCCCTGGGA GTCGTGCTAC 1380
AAGTCGGCCA GGCTGCTGGG TGGCAAGTGC GAGTTCATCC TCTCCAACAG CGGTCACATC 1440
CAGAGCATCC TCAACCCACC GGGCAACCCC AAGGCACGCT TCATGACCAA TCCGGAACTG 1500 CCCGCCGAGC CCAAGGCCTG GCTGGAACAG GCCGGCAAGC ACGCCGACTC GTGGTGGTTG 1560
CACTGGCAGC AATGGCTGGC CGAACGCTCC GGCAAGACCC GCAAGGCGCC CGCCAGCCTG 1620
GGCAACAAGA CCTATCCGGC CGGCGAAGCC GCGCCCGGAA CCTACGTGCA TGAACGATCA 1680
AAAGCTTTGG GCAAAGGTGT TACCGAGGAA CAATTCAAAG AGACCTGGAC GAGGCCGGGA 1740 GCTGCTGGAA TGGGCGAAGG GACTAGCCTT GTGGTGGCCA AGTCCAGAAT G 1791
(2) INFORMATION FOR SEQ ID NO: 18:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 597 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS: (D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 18:
Met Ser Gin Lys Asn Asn Asn Glu Leu Pro Lys Gin Ala Ala Glu Asn 1 5 10 15
Thr Leu Asn Leu Asn Pro Val lie Gly lie Arg Gly Lys Asp Leu Leu 20 25 30
Thr Ser Ala Arg Met Val Leu Leu Gin Ala Val Arg Gin Pro Leu His 35 40 45
Ser Ala Arg His Val Ala His Phe Ser Leu Glu Leu Lys Asn Val Leu 50 55 60 Leu Gly Gin Ser Glu Leu Arg Pro Gly Asp Asp Asp Arg Arg Phe Ser 65 70 75 80
Asp Pro Ala Trp Ser Gin Asn Pro Leu Tyr Lys Arg Tyr Met Gin Thr 85 90 95
Tyr Leu Ala Trp Arg Lys Glu Leu His Ser Trp lie Ser His Ser Asp 100 105 110
Leu Ser Pro Gin Asp lie Ser Arg Gly Gin Phe Val lie Asn Leu Leu 115 120 125
Thr Glu Ala Met Ser Pro Thr Asn Ser Leu Ser Asn Pro Ala Ala Val 130 135 140 Lys Arg Phe Phe Glu Thr Gly Gly Lys Ser Leu Leu Asp Gly Leu Gly 145 150 155 160
His Leu Ala Lys Asp Leu Val Asn Asn Gly Gly Met Pro Ser Gin Val 165 170 175
Asp Met Asp Ala Phe Glu Val Gly Lys Asn Leu Ala Thr Thr Glu Gly 180 185 190
Ala Val Val Phe Arg Asn Asp Val Leu Glu Leu lie Gin Tyr Arg Pro 195 200 205 lie Thr Glu Ser Val His Glu Arg Pro Leu Leu Val Val Pro Pro Gin 210 215 220 lie Asn Lys Phe Tyr Val Phe Asp Leu Ser Pro Asp Lys Ser Leu Ala 225 230 235 240
Arg Phe Cys Leu Arg Asn Gly Val Gin Thr Phe lie Val Ser Trp Arg 245 250 255 Asn Pro Thr Lys Ser Gin Arg Glu Trp Gly Leu Thr Thr Tyr lie Glu
260 265 270
Ala Leu Lys Glu Ala lie Glu Val Val Leu Ser lie Thr Gly Ser Lys 275 280 285
Asp Leu Asn Leu Leu Gly Ala Cys Ser Gly Gly lie Thr Thr Ala Thr 290 295 300
Leu Val Gly His Tyr Val Ala Ser Gly Glu Lys Lys Val Asn Ala Phe 305 310 315 320
Thr Gin Leu Val Ser Val Leu Asp Phe Glu Leu Asn Thr Gin Val Ala 325 330 335 Leu Phe Ala Asp Glu Lys Thr Leu Glu Ala Ala Lys Arg Arg Ser Tyr
340 345 350
Gin Ser Gly Val Leu Glu Gly Lys Asp Met Ala Lys Val Phe Ala Trp 355 360 365
Met Arg Pro Asn Asp Leu lie Trp Asn Tyr Trp Val Asn Asn Tyr Leu 370 375 380
Leu Gly Asn Gin Pro Pro Ala Phe Asp lie Leu Tyr Trp Asn Asn Asp 385 390 395 400
Thr Thr Arg Leu Pro Ala Ala Leu His Gly Glu Phe Val Glu Leu Phe 405 410 415 Lys Ser Asn Pro Leu Asn Arg Pro Gly Ala Leu Glu Val Ser Gly Thr
420 425 430
Pro lie Asp Leu Lys Gin Val Thr Cys Asp Phe Tyr Cys Val Ala Gly 435 440 445
Leu Asn Asp His lie Thr Pro Trp Glu Ser Cys Tyr Lys Ser Ala Arg 450 455 460
Leu Leu Gly Gly Lys Cys Glu Phe lie Leu Ser Asn Ser Gly His lie 465 470 475 480
Gin Ser lie Leu Asn Pro Pro Gly Asn Pro Lys Ala Arg Phe Met Thr 485 490 495 Asn Pro Glu Leu Pro Ala Glu Pro Lys Ala Trp Leu Glu Gin Ala Gly
500 505 510 Lys His Ala Asp Ser Trp Trp Leu His Trp Gin Gin Trp Leu Ala Glu 515 520 525
Arg Ser Gly Lys Thr Arg Lys Ala Pro Ala Ser Leu Gly Asn Lys Thr 530 535 540
Tyr Pro Ala Gly Glu Ala Ala Pro Gly Thr Tyr Val His Glu Arg Ser 545 550 555 560
Lys Ala Leu Gly Lys Gly Val Thr Glu Glu Gin Phe Lys Glu Thr Trp 565 570 575
Thr Arg Pro Gly Ala Ala Gly Met Gly Glu Gly Thr Ser Leu Val Val 580 585 590
Ala Lys Ser Arg Met 595 (2) INFORMATION FOR SEQ ID NO: 19:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 1794 base pairs
(B) TYPE: nucleic acid (C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 19:
ATGCGTGAAA AGCAGGAATC GGGTAGCGTG CCGGTGCCCG CCGAGTTCAT GAGTGCACAG 60
AGCGCCATCG TCGGCCTGCG CGGCAAGGAC CTGCTGACGA CGGTCCGCAG CCTGGCTGTC 120
CACGGCCTGC GCCAGCCGCT GCACAGTGCG CGGCACCTGG TCGCCTTCGG AGGCCAGTTG 180 GGCAAGGTGC TGCTGGGCGA CACCCTGCAC CAGCCGAACC CACAGGACGC CCGCTTCCAG 240
GATCCATCCT GGCGCCTCAA TCCCTTCTAC CGGCGCACCC TGCAGGCCTA CCTGGCGTGG 300
CAGAAACAAC TGCTCGCCTG GATCGACGAA AGCAACCTGG ACTGCGACGA TCGCGCCCGC 360
GCCCGCTTCC TCGTCGCCTT GCTCTCCGAC GCCGTGGCAC CCAGCAACAG CCTGATCAAT 420
CCACTGGCGT TAAAGGAACT GTTCAATACC GGCGGGATCA GCCTGCTCAA TGGCGTCCGC 480 CACCTGCTCG AAGACCTGGT GCACAACGGC GGCATGCCCA GCCAGGTGAA CAAGACCGCC 540
TTCGAGATCG GTCGCAACCT CGCCACCACG CAAGGCGCGG TGGTGTTCCG CAACGAGGTG 600
CTGGAGCTGA TCCAGTACAA GCCGCTGGGC GAGCGCCAGT ACGCCAAGCC CCTGCTGATC 660
GTGCCGCCGC AGATCAACAA GTACTACATC TTCGACCTGT CGCCGGAAAA GAGCTTCGTC 720 CAGTACGCCC TGAAGAACAA CCTGCAGGTC TTCGTCATCA GTTGGCGCAA CCCCGACGCC 780
CAGCACCGCG AATGGGGCCT GAGCACCTAT GTCGAGGCCC TCGACCAGGC CATCGAGGTC 840
AGCCGCGAGA TCACCGGCAG CCGCAGCGTG AACCTGGCCG GCGCCTGCGC CGGCGGGCTC 900
ACCGTAGCCG CCTTGCTCGG CCACCTGCAG GTGCGCCGGC AACTGCGCAA GGTCAGTAGC 960 GTCACCTACC TGGTCAGCCT GCTCGACAGC CAGATGGAAA GCCCGGCGAT GCTCTTCGCC 1020
GACGAGCAGA CCCTGGAGAG CAGCAAGCGC CGCTCCTACC AGCATGGCGT GCTGGACGGG 1080
CGCGACATGG CCAAGGTGTT CGCCTGGATG CGCCCCAACG ACCTGATCTG GAACTACTGG 1140
GTCAACAACT ACCTGCTCGG CAGGCAGCCG CCGGCGTTCG ACATCCTCTA CTGGAACAAC 1200
GACAACACGC GGCTGCCCGC GGCGTTCCAC GGCGAACTGC TCGACCTGTT CAAGCACAAC 1260 CCGCTGACCC GCCCGGGCGC GCTGGAGGTC AGCGGGACCG CGGTGGACCT GGGCAAGGTG 1320
GCGATCGACA GCTTCCACGT CGCCGGCATC ACCGACCACA TCACGCCCTG GGACGCGGTG 1380
TATCGCTCGG CCCTCCTGCT GGGCGGCCAG CGCCGCTTCA TCCTGTCCAA CAGCGGGCAC 1440
ATCCAGAGCA TCCTCAACCC TCCCGGAAAC CCCAAGGCCT GCTACTTCGA GAACGACAAG 1500
CTGAGCAGCG ATCCACGCGC CTGGTACTAC GACGCCAAGC GCGAAGAGGG CAGCTGGTGG 1560 CCGGTCTGGC TGGGCTGGCT GCAGGAGCGC TCGGGCGAGC TGGGCAACCC TGACTTCAAC 1620
CTTGGCAGCG CCGCGCATCC GCCCCTCGAA GCGGCCCCGG GCACCTACGT GCATATACGC 1680
TCAAAAGCTT TGGGCAAAGG TGTTACCGAG GAACAATTCA AAGAGACCTG GACGAGGCCG 1740
GGAGCTGCTG GAATGGGCGA AGGGACTAGC CTTGTGGTGG CCAAGTCCAG AATG 1794
(2) INFORMATION FOR SEQ ID NO : 20: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 598 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS :
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 20:
Met Arg Glu Lys Gin Glu Ser Gly Ser Val Pro Val Pro Ala Glu Phe 1 5 10 15 Met Ser Ala Gin Ser Ala lie Val Gly Leu Arg Gly Lys Asp Leu Leu
20 25 30 Thr Thr Val Arg Ser Leu Ala Val His Gly Leu Arg Gin Pro Leu His 35 40 45
Ser Ala Arg His Leu Val Ala Phe Gly Gly Gin Leu Gly Lys Val Leu 50 55 60
Leu Gly Asp Thr Leu His Gin Pro Asn Pro Gin Asp Ala Arg Phe Gin 65 70 75 80
Asp Pro Ser Trp Arg Leu Asn Pro Phe Tyr Arg Arg Thr Leu Gin Ala 85 90 95
Tyr Leu Ala Trp Gin Lys Gin Leu Leu Ala Trp lie Asp Glu Ser Asn 100 105 110
Leu Asp Cys Asp Asp Arg Ala Arg Ala Arg Phe Leu Val Ala Leu Leu 115 120 125 Ser Asp Ala Val Ala Pro Ser Asn Ser Leu lie Asn Pro Leu Ala Leu 130 135 140
Lys Glu Leu Phe Asn Thr Gly Gly lie Ser Leu Leu Asn Gly Val Arg 145 150 155 160
His Leu Leu Glu Asp Leu Val His Asn Gly Gly Met Pro Ser Gin Val 165 170 175
Asn Lys Thr Ala Phe Glu lie Gly Arg Asn Leu Ala Thr Thr Gin Gly 180 185 190
Ala Val Val Phe Arg Asn Glu Val Leu Glu Leu lie Gin Tyr Lys Pro 195 200 205 Leu Gly Glu Arg Gin Tyr Ala Lys Pro Leu Leu lie Val Pro Pro Gin 210 215 220 lie Asn Lys Tyr Tyr lie Phe Asp Leu Ser Pro Glu Lys Ser Phe Val 225 230 235 240
Gin Tyr Ala Leu Lys Asn Asn Leu Gin Val Phe Val lie Ser Trp Arg 245 250 255
Asn Pro Asp Ala Gin His Arg Glu Trp Gly Leu Ser Thr Tyr Val Glu 260 265 270
Ala Leu Asp Gin Ala lie Glu Val Ser Arg Glu lie Thr Gly Ser Arg 275 280 285 Ser Val Asn Leu Ala Gly Ala Cys Ala Gly Gly Leu Thr Val Ala Ala 290 295 300
Leu Leu Gly His Leu Gin Val Arg Arg Gin Leu Arg Lys Val Ser Ser 305 310 315 320
Val Thr Tyr Leu Val Ser Leu Leu Asp Ser Gin Met Glu Ser Pro Ala 325 330 335
Met Leu Phe Ala Asp Glu Gin Thr Leu Glu Ser Ser Lys Arg Arg Ser 340 345 350
Tyr Gin His Gly Val Leu Asp Gly Arg Asp Met Ala Lys Val Phe Ala 355 360 365
Trp Met Arg Pro Asn Asp Leu lie Trp Asn Tyr Trp Val Asn Asn Tyr 370 375 380
Leu Leu Gly Arg Gin Pro Pro Ala Phe Asp lie Leu Tyr Trp Asn Asn 385 390 395 400 Asp Asn Thr Arg Leu Pro Ala Ala Phe His Gly Glu Leu Leu Asp Leu
405 410 415
Phe Lys His Asn Pro Leu Thr Arg Pro Gly Ala Leu Glu Val Ser Gly 420 425 430
Thr Ala Val Asp Leu Gly Lys Val Ala lie Asp Ser Phe His Val Ala 435 440 445
Gly lie Thr Asp His lie Thr Pro Trp Asp Ala Val Tyr Arg Ser Ala 450 455 460
Leu Leu Leu Gly Gly Gin Arg Arg Phe lie Leu Ser Asn Ser Gly His 465 470 475 480 He Gin Ser He Leu Asn Pro Pro Gly Asn Pro Lys Ala Cys Tyr Phe
485 490 495
Glu Asn Asp Lys Leu Ser Ser Asp Pro Arg Ala Trp Tyr Tyr Asp Ala 500 505 510
Lys Arg Glu Glu Gly Ser Trp Trp Pro Val Trp Leu Gly Trp Leu Gin 515 520 525
Glu Arg Ser Gly Glu Leu Gly Asn Pro Asp Phe Asn Leu Gly Ser Ala 530 535 540
Ala His Pro Pro Leu Glu Ala Ala Pro Gly Thr Tyr Val His He Arg 545 550 555 560 Ser Lys Ala Leu Gly Lys Gly Val Thr Glu Glu Gin Phe Lys Glu Thr
565 570 575
Trp Thr Arg Pro Gly Ala Ala Gly Met Gly Glu Gly Thr Ser Leu Val 580 585 590
Val Ala Lys Ser Arg Met 595
(2) INFORMATION FOR SEQ ID NO: 21:
(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2737 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 21:
GAATTCATGT CTCCAGTTGA TTTTAAAGAT AAAGTTGTGA TCATTACCGG TGCCGGTGGT 60
GGTTTGGGTA AATACTACTC CCTCGAATTT GCCAAGTTGG GCGCCAAAGT CGTCGTTAAC 120
GACTTGGGTG GTGCCTTGAA CGGTCAAGGT GGAAACTCCA AGGCCGCCGA CGTTGTCGTT 180
GACGAAATTG TCAAGAACGG TGGTGTTGCC GTTGCCGATT ACAACAACGT CTTGGACGGT 240 GACAAGATTG TCGAAACCGC CGTCAAGAAC TTTGGTACTG TCCACGTTAT CATCAACAAT 300
GCCGGTATCT TGAGAGATGC CTCCATGAAG AAGATGACTG AAAAAGACTA CAAATTGGTC 360
ATTGACGTGC ACTTGAACGG TGCCTTTGCC GTCACCAAGG CTGCTTGGCC ATACTTCCAA 420
AAGCAAAAAT ACGGTAGAAT TGTCAACACA TCCTCCCCAG CTGGTTTGTA CGGTAACTTT 480
GGTCAAGCCA ACTACGCCTC CGCCAAGTCT GCTTTGTTGG GATTCGCTGA AACCTTGGCC 540 AAGGAAGGTG CCAAATACAA CATCAAGGCC AACGCCATTG CTCCGTTGGC CAGATCAAGA 600
ATGACTGAAT CTATCTTGCC ACCTCCAATG TTGGAAAAAT TGGGCCCTGA AAAGGTTGCC 660
CCATTGGTCT TGTATTTGTC GTCAGCTGAA AACGAATTGA CTGGTCAATT CTTTGAAGTT 720
GCTGCTGGCT TTTACGCTCA GATCAGATGG GAAAGATCCG GTGGTGTCTT GTTCAAGCCA 780
GATCAATCCT TCACCGCTGA GGTTGTTGCT AAGAGATTCT CTGAAATCCT TGATTATGAC 840 GACTCTAGGA AGCCAGAATA CTTGAAGAAC CAATACCCAT TCATGTTGAA CGACTACGCC 900
ACTTTGACCA ACGAAGCTAG AAAGTTGCCA GCTAACGATG CTTCTGGTGC TCCAACTGTC 960
TCCTTGAAGG ACAAGGTTGT TTTGATCACC GGTGCCGGTG CTGGTTTGGG TAAAGAATAC 1020
GCCAAGTGGT TCGCCAAGTA CGGTGCCAAG GTTGTTGTTA ACGACTTCAA GGATGCTACC 1080
AAGACCGTTG ACGAAATCAA AGCCGCTGGT GGTGAAGCTT GGCCAGATCA ACACGATGTT 1140 GCCAAGGACT CCGAAGCTAT CATCAAGAAT GTCATTGACA AGTACGGTAC CATTGATATC 1200
TTGGTCAACA ACGCCGGTAT CTTGAGAGAC AGATCCTTTG CCAAGATGTC CAAGCAAGAA 1260
TGGGACTCTG TCCAACAAGT CCACTTGATT GGTACTTTCA ACTTGAGCAG ATTGGCATGG 1320
CCATACTTTG TTGAAAAACA ATTTGGTAGA ATCATCAACA TTACCTCCAC CAGTGGTATC 1380 TACGGTAACT TTGGTCAAGC CAACTACTCG TCTTCTAAGG CTGGTATCTT GGGTTTGTCC 1440
AAGACCATGG CCATTGAAGG TGCTAAGAAT AACATTAAGG TCAACATTGT TGCTCCACAC 1500
GCTGAAACTG CCATGACCTT GACCATCTTC AGAGAACAAG ACAAGAACTT GTACCACGCT 1560
GACCAAGTTG CTCCATTGTT GGTCTACTTG GGTACTGACG ATGTCCCAGT CACCGGTGAA 1620 ACTTCCGAAA TCGGTGGTGG TTGGATCGGT AACACCAGAT GGCAAAGAGC CAAGGGTGCT 1680
GTCTCCCACG ACGAACACAC CACTGTTGAA TTCATCAAGG AGCACTTGAA CGAAATCACT 1740
GACTTCACCA CTGACACTGA AAATCCAAAA TCTACCACCG AATCCTCCAT GGCTATCTTG 1800
TCTGCCGTTG GTGGTGATGA CGATGATGAT GACGAAGACG AAGAAGAAGA CGAAGGTGAT 1860
GAAGAAGAAG ACGAAGAAGA CGAAGAAGAA GACGATCCAG TCTGGAGATT CGACGACAGA 1920 GATGTTATCT TGTACAACAT TGCCCTTGGT GCCACCACCA AGCAATTGAA GTACGTCTAC 1980
GAAAACGACT CTGACTTCCA AGTCATTCCA ACCTTTGGTC ACTTGATCAC CTTCAACTCT 2040
GGTAAGTCAC AAAACTCCTT TGCCAAGTTG TTGCGTAACT TCAACCCAAT GTTGTTGTTG 2100
CACGGTGAAC ACTACTTGAA GGTGCACAGC TGGCCACCAC CAACCGAAGG TGAAATCAAG 2160
ACCACTTTCG AACCAATTGC CACTACTCCA AAGGGTACCA ACGTTGTTAT TGTTCACGGT 2220 TCCAAATCTG TTGACAACAA GTCTGGTGAA TTGATTTACT CCAACGAAGC CACTTACTTC 2280
ATCAGAAACT GTCAAGCCGA CAACAAGGTC TACGCTGACC GTCCAGCATT CGCCACCAAC 2340
CAATTCTTGG CACCAAAGAG AGCCCCAGAC TACCAAGTTG ACGTTCCAGT CAGTGAAGAC 2400
TTGGCTGCTT TGTACCGTTT GTCTGGTGAC AGAAACCCAT TGCACATTGA TCCAAACTTT 2460
GCTAAAGGTG CCAAGTTCCC TAAGCCAATC TTACACGGTA TGTGCACTTA TGGTTTGAGT 2520 GCTAAGGCTT TGATTGACAA GTTTGGTATG TTCAACGAAA TCAAGGCCAG ATTCACCGGT 2580
ATTGTCTTCC CAGGTGAAAC CTTGAGAGTC TTGGCATGGA AGGAAAGCGA TGACACTATT 2640
GTCTTCCAAA CTCATGTTGT TGATAGAGGT ACTATTGCCA TTAACAACGC TGCTATTAAG 2700
TTAGTCGGTG ACAAAGCAAA GATCTAATGA AGGATCC 2737
(2) INFORMATION FOR SEQ ID NO: 22: (i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 906 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS:
(D) TOPOLOGY: linear (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 22:
Met Ser Pro Val Asp Phe Lys Asp Lys Val Val He He Thr Gly Ala 1 5 10 15
Gly Gly Gly Leu Gly Lys Tyr Tyr Ser Leu Glu Phe Ala Lys Leu Gly 20 25 30
Ala Lys Val Val Val Asn Asp Leu Gly Gly Ala Leu Asn Gly Gin Gly 35 40 45 Gly Asn Ser Lys Ala Ala Asp Val Val Val Asp Glu He Val Lys Asn 50 55 60
Gly Gly Val Ala Val Ala Asp Tyr Asn Asn Val Leu Asp Gly Asp Lys 65 70 75 80
He Val Glu Thr Ala Val Lys Asn Phe Gly Thr Val His Val He He 85 90 95
Asn Asn Ala Gly He Leu Arg Asp Ala Ser Met Lys Lys Met Thr Glu 100 105 110
Lys Asp Tyr Lys Leu Val He Asp Val His Leu Asn Gly Ala Phe Ala 115 120 125 Val Thr Lys Ala Ala Trp Pro Tyr Phe Gin Lys Gin Lys Tyr Gly Arg 130 135 140
He Val Asn Thr Ser Ser Pro Ala Gly Leu Tyr Gly Asn Phe Gly Gin 145 150 155 160
Ala Asn Tyr Ala Ser Ala Lys Ser Ala Leu Leu Gly Phe Ala Glu Thr 165 170 175
Leu Ala Lys Glu Gly Ala Lys Tyr Asn He Lys Ala Asn Ala He Ala 180 185 190
Pro Leu Ala Arg Ser Arg Met Thr Glu Ser He Leu Pro Pro Pro Met 195 200 205 Leu Glu Lys Leu Gly Pro Glu Lys Val Ala Pro Leu Val Leu Tyr Leu 210 215 220
Ser Ser Ala Glu Asn Glu Leu Thr Gly Gin Phe Phe Glu Val Ala Ala 225 230 235 240
Gly Phe Tyr Ala Gin He Arg Trp Glu Arg Ser Gly Gly Val Leu Phe 245 250 255
Lys Pro Asp Gin Ser Phe Thr Ala Glu Val Val Ala Lys Arg Phe Ser 260 265 270 Glu He Leu Asp Tyr Asp Asp Ser Arg Lys Pro Glu Tyr Leu Lys Asn 275 280 285
Gin Tyr Pro Phe Met Leu Asn Asp Tyr Ala Thr Leu Thr Asn Glu Ala 290 295 300
Arg Lys Leu Pro Ala Asn Asp Ala Ser Gly Ala Pro Thr Val Ser Leu 305 310 315 320 Lys Asp Lys Val Val Leu He Thr Gly Ala Gly Ala Gly Leu Gly Lys
325 330 335
Glu Tyr Ala Lys Trp Phe Ala Lys Tyr Gly Ala Lys Val Val Val Asn 340 345 350
Asp Phe Lys Asp Ala Thr Lys Thr Val Asp Glu He Lys Ala Ala Gly 355 360 365
Gly Glu Ala Trp Pro Asp Gin His Asp Val Ala Lys Asp Ser Glu Ala 370 375 380
He He Lys Asn Val He Asp Lys Tyr Gly Thr He Asp He Leu Val 385 390 395 400 Asn Asn Ala Gly He Leu Arg Asp Arg Ser Phe Ala Lys Met Ser Lys
405 410 415
Gin Glu Trp Asp Ser Val Gin Gin Val His Leu He Gly Thr Phe Asn 420 425 430
Leu Ser Arg Leu Ala Trp Pro Tyr Phe Val Glu Lys Gin Phe Gly Arg 435 440 445
He He Asn He Thr Ser Thr Ser Gly He Tyr Gly Asn Phe Gly Gin 450 455 460
Ala Asn Tyr Ser Ser Ser Lys Ala Gly He Leu Gly Leu Ser Lys Thr 465 470 475 480 Met Ala He Glu Gly Ala Lys Asn Asn He Lys Val Asn He Val Ala
485 490 495
Pro His Ala Glu Thr Ala Met Thr Leu Thr He Phe Arg Glu Gin Asp 500 505 510
Lys Asn Leu Tyr His Ala Asp Gin Val Ala Pro Leu Leu Val Tyr Leu 515 520 525
Gly Thr Asp Asp Val Pro Val Thr Gly Glu Thr Ser Glu He Gly Gly 530 535 540
Gly Trp He Gly Asn Thr Arg Trp Gin Arg Ala Lys Gly Ala Val Ser 545 550 555 560 His Asp Glu His Thr Thr Val Glu Phe He Lys Glu His Leu Asn Glu
565 570 575 He Thr Asp Phe Thr Thr Asp Thr Glu Asn Pro Lys Ser Thr Thr Glu 580 585 590
Ser Ser Met Ala He Leu Ser Ala Val Gly Gly Asp Asp Asp Asp Asp 595 600 605
Asp Glu Asp Glu Glu Glu Asp Glu Gly Asp Glu Glu Glu Asp Glu Glu 610 615 620
Asp Glu Glu Glu Asp Asp Pro Val Trp Arg Phe Asp Asp Arg Asp Val 625 630 635 640
He Leu Tyr Asn He Ala Leu Gly Ala Thr Thr Lys Gin Leu Lys Tyr 645 650 655
Val Tyr Glu Asn Asp Ser Asp Phe Gin Val He Pro Thr Phe Gly His 660 665 670 Leu He Thr Phe Asn Ser Gly Lys Ser Gin Asn Ser Phe Ala Lys Leu 675 680 685
Leu Arg Asn Phe Asn Pro Met Leu Leu Leu His Gly Glu His Tyr Leu 690 695 700
Lys Val His Ser Trp Pro Pro Pro Thr Glu Gly Glu He Lys Thr Thr 705 710 715 720
Phe Glu Pro He Ala Thr Thr Pro Lys Gly Thr Asn Val Val He Val 725 730 735
His Gly Ser Lys Ser Val Asp Asn Lys Ser Gly Glu Leu He Tyr Ser 740 745 750 Asn Glu Ala Thr Tyr Phe He Arg Asn Cys Gin Ala Asp Asn Lys Val 755 760 765
Tyr Ala Asp Arg Pro Ala Phe Ala Thr Asn Gin Phe Leu Ala Pro Lys 770 775 780
Arg Ala Pro Asp Tyr Gin Val Asp Val Pro Val Ser Glu Asp Leu Ala 785 790 795 800
Ala Leu Tyr Arg Leu Ser Gly Asp Arg Asn Pro Leu His He Asp Pro 805 810 815
Asn Phe Ala Lys Gly Ala Lys Phe Pro Lys Pro He Leu His Gly Met 820 825 830 Cys Thr Tyr Gly Leu Ser Ala Lys Ala Leu He Asp Lys Phe Gly Met 835 840 845
Phe Asn Glu He Lys Ala Arg Phe Thr Gly He Val Phe Pro Gly Glu 850 855 860
Thr Leu Arg Val Leu Ala Trp Lys Glu Ser Asp Asp Thr He Val Phe 865 870 875 880
Gin Thr His Val Val Asp Arg Gly Thr He Ala He Asn Asn Ala Ala 885 890 895
He Lys Leu Val Gly Asp Lys Ala Lys He 900 905
(2) INFORMATION FOR SEQ ID NO: 23:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 2737 base pairs
(B) TYPE: nucleic acid
(C) STRANDEDNESS: single (D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 23:
GGATCCATGT CTCCAGTTGA TTTTAAAGAT AAAGTTGTGA TCATTACCGG TGCCGGTGGT 60 GGTTTGGGTA AATACTACTC CCTCGAATTT GCCAAGTTGG GCGCCAAAGT CGTCGTTAAC 120
GACTTGGGTG GTGCCTTGAA CGGTCAAGGT GGAAACTCCA AGGCCGCCGA CGTTGTCGTT 180
GACGAAATTG TCAAGAACGG TGGTGTTGCC GTTGCCGATT ACAACAACGT CTTGGACGGT 240
GACAAGATTG TCGAAACCGC CGTCAAGAAC TTTGGTACTG TCCACGTTAT CATCAACAAT 300
GCCGGTATCT TGAGAGATGC CTCCATGAAG AAGATGACTG AAAAAGACTA CAAATTGGTC 360 ATTGACGTGC ACTTGAACGG TGCCTTTGCC GTCACCAAGG CTGCTTGGCC ATACTTCCAA 420
AAGCAAAAAT ACGGTAGAAT TGTCAACACA TCCTCCCCAG CTGGTTTGTA CGGTAACTTT 480
GGTCAAGCCA ACTACGCCTC CGCCAAGTCT GCTTTGTTGG GATTCGCTGA AACCTTGGCC 540
AAGGAAGGTG CCAAATACAA CATCAAGGCC AACGCCATTG CTCCGTTGGC CAGATCAAGA 600
ATGACTGAAT CTATCTTGCC ACCTCCAATG TTGGAAAAAT TGGGCCCTGA AAAGGTTGCC 660 CCATTGGTCT TGTATTTGTC GTCAGCTGAA AACGAATTGA CTGGTCAATT CTTTGAAGTT 720
GCTGCTGGCT TTTACGCTCA GATCAGATGG GAAAGATCCG GTGGTGTCTT GTTCAAGCCA 780
GATCAATCCT TCACCGCTGA GGTTGTTGCT AAGAGATTCT CTGAAATCCT TGATTATGAC 840
GACTCTAGGA AGCCAGAATA CTTGAAGAAC CAATACCCAT TCATGTTGAA CGACTACGCC 900
ACTTTGACCA ACGAAGCTAG AAAGTTGCCA GCTAACGATG CTTCTGGTGC TCCAACTGTC 960 TCCTTGAAGG ACAAGGTTGT TTTGATCACC GGTGCCGGTG CTGGTTTGGG TAAAGAATAC 1020 GCCAAGTGGT TCGCCAAGTA CGGTGCCAAG GTTGTTGTTA ACGACTTCAA GGATGCTACC 1080
AAGACCGTTG ACGAAATCAA AGCCGCTGGT GGTGAAGCTT GGCCAGATCA ACACGATGTT 1140 GCCAAGGACT CCGAAGCTAT CATCAAGAAT GTCATTGACA AGTACGGTAC CATTGATATC 1200
TTGGTCAACA ACGCCGGTAT CTTGAGAGAC AGATCCTTTG CCAAGATGTC CAAGCAAGAA 1260
TGGGACTCTG TCCAACAAGT CCACTTGATT GGTACTTTCA ACTTGAGCAG ATTGGCATGG 1320
CCATACTTTG TTGAAAAACA ATTTGGTAGA ATCATCAACA TTACCTCCAC CAGTGGTATC 1380
TACGGTAACT TTGGTCAAGC CAACTACTCG TCTTCTAAGG CTGGTATCTT GGGTTTGTCC 1440 AAGACCATGG CCATTGAAGG TGCTAAGAAT AACATTAAGG TCAACATTGT TGCTCCACAC 1500
GCTGAAACTG CCATGACCTT GACCATCTTC AGAGAACAAG ACAAGAACTT GTACCACGCT 1560
GACCAAGTTG CTCCATTGTT GGTCTACTTG GGTACTGACG ATGTCCCAGT CACCGGTGAA 1620
ACTTCCGAAA TCGGTGGTGG TTGGATCGGT AACACCAGAT GGCAAAGAGC CAAGGGTGCT 1680
GTCTCCCACG ACGAACACAC CACTGTTGAA TTCATCAAGG AGCACTTGAA CGAAATCACT 1740 GACTTCACCA CTGACACTGA AAATCCAAAA TCTACCACCG AATCCTCCAT GGCTATCTTG 1800
TCTGCCGTTG GTGGTGATGA CGATGATGAT GACGAAGACG AAGAAGAAGA CGAAGGTGAT 1860
GAAGAAGAAG ACGAAGAAGA CGAAGAAGAA GACGATCCAG TCTGGAGATT CGACGACAGA 1920
GATGTTATCT TGTACAACAT TGCCCTTGGT GCCACCACCA AGCAATTGAA GTACGTCTAC 1980
GAAAACGACT CTGACTTCCA AGTCATTCCA ACCTTTGGTC ACTTGATCAC CTTCAACTCT 2040 GGTAAGTCAC AAAACTCCTT TGCCAAGTTG TTGCGTAACT TCAACCCAAT GTTGTTGTTG 2100
CACGGTGAAC ACTACTTGAA GGTGCACAGC TGGCCACCAC CAACCGAAGG TGAAATCAAG 2160
ACCACTTTCG AACCAATTGC CACTACTCCA AAGGGTACCA ACGTTGTTAT TGTTCACGGT 2220
TCCAAATCTG TTGACAACAA GTCTGGTGAA TTGATTTACT CCAACGAAGC CACTTACTTC 2280
ATCAGAAACT GTCAAGCCGA CAACAAGGTC TACGCTGACC GTCCAGCATT CGCCACCAAC 2340 CAATTCTTGG CACCAAAGAG AGCCCCAGAC TACCAAGTTG ACGTTCCAGT CAGTGAAGAC 2400
TTGGCTGCTT TGTACCGTTT GTCTGGTGAC AGAAACCCAT TGCACATTGA TCCAAACTTT 2460
GCTAAAGGTG CCAAGTTCCC TAAGCCAATC TTACACGGTA TGTGCACTTA TGGTTTGAGT 2520
GCTAAGGCTT TGATTGACAA GTTTGGTATG TTCAACGAAA TCAAGGCCAG ATTCACCGGT 2580
ATTGTCTTCC CAGGTGAAAC CTTGAGAGTC TTGGCATGGA AGGAAAGCGA TGACACTATT 2640 GTCTTCCAAA CTCATGTTGT TGATAGAGGT ACTATTGCCA TTAACAACGC TGCTATTAAG 2700 TTAGTCGGTG ACAAATCCAA GTTGTAATGA AGGATCC 2737
(2) INFORMATION FOR SEQ ID NO: 24:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 906 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS:
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 24:
Met Ser Pro Val Asp Phe Lys Asp Lys Val Val He He Thr Gly Ala 1 5 10 15 Gly Gly Gly Leu Gly Lys Tyr Tyr Ser Leu Glu Phe Ala Lys Leu Gly
20 25 30
Ala Lys Val Val Val Asn Asp Leu Gly Gly Ala Leu Asn Gly Gin Gly 35 40 45
Gly Asn Ser Lys Ala Ala Asp Val Val Val Asp Glu He Val Lys Asn 50 55 60
Gly Gly Val Ala Val Ala Asp Tyr Asn Asn Val Leu Asp Gly Asp Lys 65 70 75 80
He Val Glu Thr Ala Val Lys Asn Phe Gly Thr Val His Val He He 85 90 95 Asn Asn Ala Gly He Leu Arg Asp Ala Ser Met Lys Lys Met Thr Glu
100 105 110
Lys Asp Tyr Lys Leu Val He Asp Val His Leu Asn Gly Ala Phe Ala 115 120 125
Val Thr Lys Ala Ala Trp Pro Tyr Phe Gin Lys Gin Lys Tyr Gly Arg 130 135 140
He Val Asn Thr Ser Ser Pro Ala Gly Leu Tyr Gly Asn Phe Gly Gin 145 150 155 160
Ala Asn Tyr Ala Ser Ala Lys Ser Ala Leu Leu Gly Phe Ala Glu Thr 165 170 175 Leu Ala Lys Glu Gly Ala Lys Tyr Asn He Lys Ala Asn Ala He Ala
180 185 190
Pro Leu Ala Arg Ser Arg Met Thr Glu Ser He Leu Pro Pro Pro Met 195 200 205
Leu Glu Lys Leu Gly Pro Glu Lys Val Ala Pro Leu Val Leu Tyr Leu 210 215 220
Ser Ser Ala Glu Asn Glu Leu Thr Gly Gin Phe Phe Glu Val Ala Ala 225 230 235 240
Gly Phe Tyr Ala Gin He Arg Trp Glu Arg Ser Gly Gly Val Leu Phe 245 250 255
Lys Pro Asp Gin Ser Phe Thr Ala Glu Val Val Ala Lys Arg Phe Ser 260 265 270
Glu He Leu Asp Tyr Asp Asp Ser Arg Lys Pro Glu Tyr Leu Lys Asn 275 280 285 Gin Tyr Pro Phe Met Leu Asn Asp Tyr Ala Thr Leu Thr Asn Glu Ala 290 295 300
Arg Lys Leu Pro Ala Asn Asp Ala Ser Gly Ala Pro Thr Val Ser Leu 305 310 315 320
Lys Asp Lys Val Val Leu He Thr Gly Ala Gly Ala Gly Leu Gly Lys 325 330 335
Glu Tyr Ala Lys Trp Phe Ala Lys Tyr Gly Ala Lys Val Val Val Asn 340 345 350
Asp Phe Lys Asp Ala Thr Lys Thr Val Asp Glu He Lys Ala Ala Gly 355 360 365 Gly Glu Ala Trp Pro Asp Gin His Asp Val Ala Lys Asp Ser Glu Ala 370 375 380
He He Lys Asn Val He Asp Lys Tyr Gly Thr He Asp He Leu Val 385 390 395 400
Asn Asn Ala Gly He Leu Arg Asp Arg Ser Phe Ala Lys Met Ser Lys 405 410 415
Gin Glu Trp Asp Ser Val Gin Gin Val His Leu He Gly Thr Phe Asn 420 425 430
Leu Ser Arg Leu Ala Trp Pro Tyr Phe Val Glu Lys Gin Phe Gly Arg 435 440 445 He He Asn He Thr Ser Thr Ser Gly He Tyr Gly Asn Phe Gly Gin 450 455 460
Ala Asn Tyr Ser Ser Ser Lys Ala Gly He Leu Gly Leu Ser Lys Thr 465 470 475 480
Met Ala He Glu Gly Ala Lys Asn Asn He Lys Val Asn He Val Ala 485 490 495
Pro His Ala Glu Thr Ala Met Thr Leu Thr He Phe Arg Glu Gin Asp 500 505 510 Lys Asn Leu Tyr His Ala Asp Gin Val Ala Pro Leu Leu Val Tyr Leu 515 520 525
Gly Thr Asp Asp Val Pro Val Thr Gly Glu Thr Ser Glu He Gly Gly 530 535 540
Gly Trp He Gly Asn Thr Arg Trp Gin Arg Ala Lys Gly Ala Val Ser 545 550 555 560 His Asp Glu His Thr Thr Val Glu Phe He Lys Glu His Leu Asn Glu
565 570 575
He Thr Asp Phe Thr Thr Asp Thr Glu Asn Pro Lys Ser Thr Thr Glu 580 585 590
Ser Ser Met Ala He Leu Ser Ala Val Gly Gly Asp Asp Asp Asp Asp 595 600 605
Asp Glu Asp Glu Glu Glu Asp Glu Gly Asp Glu Glu Glu Asp Glu Glu 610 615 620
Asp Glu Glu Glu Asp Asp Pro Val Trp Arg Phe Asp Asp Arg Asp Val 625 630 635 640 He Leu Tyr Asn He Ala Leu Gly Ala Thr Thr Lys Gin Leu Lys Tyr
645 650 655
Val Tyr Glu Asn Asp Ser Asp Phe Gin Val He Pro Thr Phe Gly His 660 665 670
Leu He Thr Phe Asn Ser Gly Lys Ser Gin Asn Ser Phe Ala Lys Leu 675 680 685
Leu Arg Asn Phe Asn Pro Met Leu Leu Leu His Gly Glu His Tyr Leu 690 695 700
Lys Val His Ser Trp Pro Pro Pro Thr Glu Gly Glu He Lys Thr Thr 705 710 715 720 Phe Glu Pro He Ala Thr Thr Pro Lys Gly Thr Asn Val Val He Val
725 730 735
His Gly Ser Lys Ser Val Asp Asn Lys Ser Gly Glu Leu He Tyr Ser 740 745 750
Asn Glu Ala Thr Tyr Phe He Arg Asn Cys Gin Ala Asp Asn Lys Val 755 760 765
Tyr Ala Asp Arg Pro Ala Phe Ala Thr Asn Gin Phe Leu Ala Pro Lys 770 775 780
Arg Ala Pro Asp Tyr Gin Val Asp Val Pro Val Ser Glu Asp Leu Ala 785 790 795 800 Ala Leu Tyr Arg Leu Ser Gly Asp Arg Asn Pro Leu His He Asp Pro
805 810 815 Asn Phe Ala Lys Gly Ala Lys Phe Pro Lys Pro He Leu His Gly Met 820 825 830
Cys Thr Tyr Gly Leu Ser Ala Lys Ala Leu He Asp Lys Phe Gly Met 835 840 845
Phe Asn Glu He Lys Ala Arg Phe Thr Gly He Val Phe Pro Gly Glu 850 855 860
Thr Leu Arg Val Leu Ala Trp Lys Glu Ser Asp Asp Thr He Val Phe 865 870 875 880
Gin Thr His Val Val Asp Arg Gly Thr He Ala He Asn Asn Ala Ala 885 890 895
He Lys Leu Val Gly Asp Lys Ser Lys Leu 900 905 (2) INFORMATION FOR SEQ ID NO : 25:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 2737 base pairs
(B) TYPE: nucleic acid (C) STRANDEDNESS: single
(D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 25:
GGATCCATGT CTCCAGTTGA TTTTAAAGAT AAAGTTGTGA TCATTACCGG TGCCGGTGGT 60
GGTTTGGGTA AATACTACTC CCTCGAATTT GCCAAGTTGG GCGCCAAAGT CGTCGTTAAC 120
GACTTGGGTG GTGCCTTGAA CGGTCAAGGT GGAAACTCCA AGGCCGCCGA CGTTGTCGTT 180 GACGAAATTG TCAAGAACGG TGGTGTTGCC GTTGCCGATT ACAACAACGT CTTGGACGGT 240
GACAAGATTG TCGAAACCGC CGTCAAGAAC TTTGGTACTG TCCACGTTAT CATCAACAAT 300
GCCGGTATCT TGAGAGATGC CTCCATGAAG AAGATGACTG AAAAAGACTA CAAATTGGTC 360
ATTGACGTGC ACTTGAACGG TGCCTTTGCC GTCACCAAGG CTGCTTGGCC ATACTTCCAA 420
AAGCAAAAAT ACGGTAGAAT TGTCAACACA TCCTCCCCAG CTGGTTTGTA CGGTAACTTT 480 GGTCAAGCCA ACTACGCCTC CGCCAAGTCT GCTTTGTTGG GATTCGCTGA AACCTTGGCC 540
AAGGAAGGTG CCAAATACAA CATCAAGGCC AACGCCATTG CTCCGTTGGC CAGATCAAGA 600
ATGACTGAAT CTATCTTGCC ACCTCCAATG TTGGAAAAAT TGGGCCCTGA AAAGGTTGCC 660
CCATTGGTCT TGTATTTGTC GTCAGCTGAA AACGAATTGA CTGGTCAATT CTTTGAAGTT 720 GCTGCTGGCT TTTACGCTCA GATCAGATGG GAAAGATCCG GTGGTGTCTT GTTCAAGCCA 780
GATCAATCCT TCACCGCTGA GGTTGTTGCT AAGAGATTCT CTGAAATCCT TGATTATGAC 840
GACTCTAGGA AGCCAGAATA CTTGAAGAAC CAATACCCAT TCATGTTGAA CGACTACGCC 900
ACTTTGACCA ACGAAGCTAG AAAGTTGCCA GCTAACGATG CTTCTGGTGC TCCAACTGTC 960 TCCTTGAAGG ACAAGGTTGT TTTGATCACC GGTGCCGGTG CTGGTTTGGG TAAAGAATAC 1020
GCCAAGTGGT TCGCCAAGTA CGGTGCCAAG GTTGTTGTTA ACGACTTCAA GGATGCTACC 1080
AAGACCGTTG ACGAAATCAA AGCCGCTGGT GGTGAAGCTT GGCCAGATCA ACACGATGTT 1140
GCCAAGGACT CCGAAGCTAT CATCAAGAAT GTCATTGACA AGTACGGTAC CATTGATATC 1200
TTGGTCAACA ACGCCGGTAT CTTGAGAGAC AGATCCTTTG CCAAGATGTC CAAGCAAGAA 1260 TGGGACTCTG TCCAACAAGT CCACTTGATT GGTACTTTCA ACTTGAGCAG ATTGGCATGG 1320
CCATACTTTG TTGAAAAACA ATTTGGTAGA ATCATCAACA TTACCTCCAC CAGTGGTATC 1380
TACGGTAACT TTGGTCAAGC CAACTACTCG TCTTCTAAGG CTGGTATCTT GGGTTTGTCC 1440
AAGACCATGG CCATTGAAGG TGCTAAGAAT AACATTAAGG TCAACATTGT TGCTCCACAC 1500
GCTGAAACTG CCATGACCTT GACCATCTTC AGAGAACAAG ACAAGAACTT GTACCACGCT 1560 GACCAAGTTG CTCCATTGTT GGTCTACTTG GGTACTGACG ATGTCCCAGT CACCGGTGAA 1620
ACTTCCGAAA TCGGTGGTGG TTGGATCGGT AACACCAGAT GGCAAAGAGC CAAGGGTGCT 1680
GTCTCCCACG ACGAACACAC CACTGTTGAA TTCATCAAGG AGCACTTGAA CGAAATCACT 1740
GACTTCACCA CTGACACTGA AAATCCAAAA TCTACCACCG AATCCTCCAT GGCTATCTTG 1800
TCTGCCGTTG GTGGTGATGA CGATGATGAT GACGAAGACG AAGAAGAAGA CGAAGGTGAT 1860 GAAGAAGAAG ACGAAGAAGA CGAAGAAGAA GACGATCCAG TCTGGAGATT CGACGACAGA 1920
GATGTTATCT TGTACAACAT TGCCCTTGGT GCCACCACCA AGCAATTGAA GTACGTCTAC 1980
GAAAACGACT CTGACTTCCA AGTCATTCCA ACCTTTGGTC ACTTGATCAC CTTCAACTCT 2040
GGTAAGTCAC AAAACTCCTT TGCCAAGTTG TTGCGTAACT TCAACCCAAT GTTGTTGTTG 2100
CACGGTGAAC ACTACTTGAA GGTGCACAGC TGGCCACCAC CAACCGAAGG TGAAATCAAG 2160 ACCACTTTCG AACCAATTGC CACTACTCCA AAGGGTACCA ACGTTGTTAT TGTTCACGGT 2220
TCCAAATCTG TTGACAACAA GTCTGGTGAA TTGATTTACT CCAACGAAGC CACTTACTTC 2280
ATCAGAAACT GTCAAGCCGA CAACAAGGTC TACGCTGACC GTCCAGCATT CGCCACCAAC 2340
CAATTCTTGG CACCAAAGAG AGCCCCAGAC TACCAAGTTG ACGTTCCAGT CAGTGAAGAC 2400 TTGGCTGCTT TGTACCGTTT GTCTGGTGAC AGAAACCCAT TGCACATTGA TCCAAACTTT 2460
GCTAAAGGTG CCAAGTTCCC TAAGCCAATC TTACACGGTA TGTGCACTTA TGGTTTGAGT 2520
GCTAAGGCTT TGATTGACAA GTTTGGTATG TTCAACGAAA TCAAGGCCAG ATTCACCGGT 2580
ATTGTCTTCC CAGGTGAAAC CTTGAGAGTC TTGGCATGGA AGGAAAGCGA TGACACTATT 2640 GTCTTCCAAA CTCATGTTGT TGATAGAGGT ACTATTGCCA TTAACAACGC TGCTATTAAG 2700
TTAGTCGGTG ACAAATGAAA GATCGAATGA AGGATCC 2737
(2) INFORMATION FOR SEQ ID NO: 26:
(i) SEQUENCE CHARACTERISTICS:
(A) LENGTH: 903 amino acids
(B) TYPE: amino acid
(C) STRANDEDNESS: (D) TOPOLOGY: linear
(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 26:
Met Ser Pro Val Asp Phe Lys Asp Lys Val Val He He Thr Gly Ala 1 5 10 15
Gly Gly Gly Leu Gly Lys Tyr Tyr Ser Leu Glu Phe Ala Lys Leu Gly 20 25 30
Ala Lys Val Val Val Asn Asp Leu Gly Gly Ala Leu Asn Gly Gin Gly 35 40 45
Gly Asn Ser Lys Ala Ala Asp Val Val Val Asp Glu He Val Lys Asn 50 55 60 Gly Gly Val Ala Val Ala Asp Tyr Asn Asn Val Leu Asp Gly Asp Lys 65 70 75 80
He Val Glu Thr Ala Val Lys Asn Phe Gly Thr Val His Val He He 85 90 95
Asn Asn Ala Gly He Leu Arg Asp Ala Ser Met Lys Lys Met Thr Glu 100 105 110
Lys Asp Tyr Lys Leu Val He Asp Val His Leu Asn Gly Ala Phe Ala 115 120 125
Val Thr Lys Ala Ala Trp Pro Tyr Phe Gin Lys Gin Lys Tyr Gly Arg 130 135 140 He Val Asn Thr Ser Ser Pro Ala Gly Leu Tyr Gly Asn Phe Gly Gin 145 150 155 160 Ala Asn Tyr Ala Ser Ala Lys Ser Ala Leu Leu Gly Phe Ala Glu Thr 165 170 175
Leu Ala Lys Glu Gly Ala Lys Tyr Asn He Lys Ala Asn Ala He Ala 180 185 190
Pro Leu Ala Arg Ser Arg Met Thr Glu Ser He Leu Pro Pro Pro Met 195 200 205
Leu Glu Lys Leu Gly Pro Glu Lys Val Ala Pro Leu Val Leu Tyr Leu 210 215 220
Ser Ser Ala Glu Asn Glu Leu Thr Gly Gin Phe Phe Glu Val Ala Ala 225 230 235 240
Gly Phe Tyr Ala Gin He Arg Trp Glu Arg Ser Gly Gly Val Leu Phe 245 250 255 Lys Pro Asp Gin Ser Phe Thr Ala Glu Val Val Ala Lys Arg Phe Ser
260 265 270
Glu He Leu Asp Tyr Asp Asp Ser Arg Lys Pro Glu Tyr Leu Lys Asn 275 280 285
Gin Tyr Pro Phe Met Leu Asn Asp Tyr Ala Thr Leu Thr Asn Glu Ala 290 295 300
Arg Lys Leu Pro Ala Asn Asp Ala Ser Gly Ala Pro Thr Val Ser Leu 305 310 315 320
Lys Asp Lys Val Val Leu He Thr Gly Ala Gly Ala Gly Leu Gly Lys 325 330 335 Glu Tyr Ala Lys Trp Phe Ala Lys Tyr Gly Ala Lys Val Val Val Asn
340 345 350
Asp Phe Lys Asp Ala Thr Lys Thr Val Asp Glu He Lys Ala Ala Gly 355 360 365
Gly Glu Ala Trp Pro Asp Gin His Asp Val Ala Lys Asp Ser Glu Ala 370 375 380
He He Lys Asn Val He Asp Lys Tyr Gly Thr He Asp He Leu Val 385 390 395 400
Asn Asn Ala Gly He Leu Arg Asp Arg Ser Phe Ala Lys Met Ser Lys 405 410 415 Gin Glu Trp Asp Ser Val Gin Gin Val His Leu He Gly Thr Phe Asn
420 425 430
Leu Ser Arg Leu Ala Trp Pro Tyr Phe Val Glu Lys Gin Phe Gly Arg 435 440 445
He He Asn He Thr Ser Thr Ser Gly He Tyr Gly Asn Phe Gly Gin 450 455 460
Ala Asn Tyr Ser Ser Ser Lys Ala Gly He Leu Gly Leu Ser Lys Thr 465 470 475 480
Met Ala He Glu Gly Ala Lys Asn Asn He Lys Val Asn He Val Ala 485 490 495
Pro His Ala Glu Thr Ala Met Thr Leu Thr He Phe Arg Glu Gin Asp 500 505 510
Lys Asn Leu Tyr His Ala Asp Gin Val Ala Pro Leu Leu Val Tyr Leu 515 520 525 Gly Thr Asp Asp Val Pro Val Thr Gly Glu Thr Ser Glu He Gly Gly 530 535 540
Gly Trp He Gly Asn Thr Arg Trp Gin Arg Ala Lys Gly Ala Val Ser 545 550 555 560
His Asp Glu His Thr Thr Val Glu Phe He Lys Glu His Leu Asn Glu 565 570 575
He Thr Asp Phe Thr Thr Asp Thr Glu Asn Pro Lys Ser Thr Thr Glu 580 585 590
Ser Ser Met Ala He Leu Ser Ala Val Gly Gly Asp Asp Asp Asp Asp 595 600 605 Asp Glu Asp Glu Glu Glu Asp Glu Gly Asp Glu Glu Glu Asp Glu Glu 610 615 620
Asp Glu Glu Glu Asp Asp Pro Val Trp Arg Phe Asp Asp Arg Asp Val 625 630 635 640
He Leu Tyr Asn He Ala Leu Gly Ala Thr Thr Lys Gin Leu Lys Tyr 645 650 655
Val Tyr Glu Asn Asp Ser Asp Phe Gin Val He Pro Thr Phe Gly His 660 665 670
Leu He Thr Phe Asn Ser Gly Lys Ser Gin Asn Ser Phe Ala Lys Leu 675 680 685 Leu Arg Asn Phe Asn Pro Met Leu Leu Leu His Gly Glu His Tyr Leu 690 695 700
Lys Val His Ser Trp Pro Pro Pro Thr Glu Gly Glu He Lys Thr Thr 705 710 715 720
Phe Glu Pro He Ala Thr Thr Pro Lys Gly Thr Asn Val Val He Val 725 730 735
His Gly Ser Lys Ser Val Asp Asn Lys Ser Gly Glu Leu He Tyr Ser 740 745 750 Asn Glu Ala Thr Tyr Phe He Arg Asn Cys Gin Ala Asp Asn Lys Val 755 760 765
Tyr Ala Asp Arg Pro Ala Phe Ala Thr Asn Gin Phe Leu Ala Pro Lys 770 775 780
Arg Ala Pro Asp Tyr Gin Val Asp Val Pro Val Ser Glu Asp Leu Ala 785 790 795 800 Ala Leu Tyr Arg Leu Ser Gly Asp Arg Asn Pro Leu His He Asp Pro
805 810 815
Asn Phe Ala Lys Gly Ala Lys Phe Pro Lys Pro He Leu His Gly Met 820 825 830
Cys Thr Tyr Gly Leu Ser Ala Lys Ala Leu He Asp Lys Phe Gly Met 835 840 845
Phe Asn Glu He Lys Ala Arg Phe Thr Gly He Val Phe Pro Gly Glu 850 855 860
Thr Leu Arg Val Leu Ala Trp Lys Glu Ser Asp Asp Thr He Val Phe 865 870 875 880 Gin Thr His Val Val Asp Arg Gly Thr He Ala He Asn Asn Ala Ala
885 890 895
He Lys Leu Val Gly Asp Lys 900

Claims

WHAT IS CLAIMED IS:
1. A non-naturally occurring fusion protein comprising: a peroxisome targeting protein subunit; and a polyhydroxyalkanoate synthase protein subunit.
2. The fusion protein of claim 1, wherein the peroxisome targeting subunit is PTS2.
3. The fusion protein of claim 1, wherein the peroxisome targeting subunit comprises a tripeptide, wherein: the first amino acid in the N-terminus to C-terminus direction is S, A, or P; the second amino acid in the N-terminus to C-terminus direction is K, R, S, or H; and the third amino acid in the N-terminus to C-terminus direction is L, M, I, or F.
4. The fusion protein of claim 3, wherein the peroxisome targeting subunit comprises ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
5. The fusion protein of claim 1, wherein the peroxisome targeting subunit is at least 70% identical to SEQ ID NO: 14.
6. The fusion protein of claim 5, wherein the peroxisome targeting protein subunit is at least 80% identical to SEQ ID NO: 14.
7. The fusion protein of claim 6, wherein the peroxisome targeting protein subunit is at least 90% identical to SEQ ID NO: 14.
8. The fusion protein of claim 7, wherein the peroxisome targeting protein subunit is SEQ ID NO: 14.
9. The fusion protein of claim 1 , wherein the polyhydroxyalkanoate synthase protein subunit is a Pseudomonas subunit.
10. The fusion protein of claim 9, wherein the Pseudomonas subunit is a Pseudomonas aeruginosa subunit.
11. The fusion protein of claim 10, wherein the polyhydroxyalkanoate synthase protein subunit is a PHACl subunit.
12. The fusion protein of claim 11, wherein the polyhydroxyalkanoate synthase protein subunit is at least 70% identical to SEQ ID NO:2.
13. The fusion protein of claim 12, wherein the polyhydroxyalkanoate synthase protein subunit is at least 80% identical to SEQ ID NO:2.
14. The fusion protein of claim 13, wherein the polyhydroxyalkanoate synthase protein subunit is at least 90% identical to SEQ ID NO:2.
15. The fusion protein of claim 14, wherein the polyhydroxyalkanoate synthase protein subunit is SEQ ID NO:2.
16. The fusion protein of claim 10, wherein the polyhydroxyalkanoate synthase protein subunit is a PHAC2 subunit.
17. The fusion protein of claim 16, wherein the polyhydroxyalkanoate synthase protein subunit is at least 70% identical to SEQ ID NO:4.
18. The fusion protein of claim 17, wherein the polyhydroxyalkanoate synthase protein subunit is at least 80% identical to SEQ ID NO:4.
19. The fusion protein of claim 18, wherein the polyhydroxyalkanoate synthase protein subunit is at least 90% identical to SEQ ID NO:4.
20. The fusion protein of claim 19, wherein the polyhydroxyalkanoate synthase protein subunit is SEQ ID NO:4.
21. The fusion protein of claim 1 , wherein the polyhydroxyalkanoate synthase protein subunit is at least 70% identical to SEQ ID NO: 18 or SEQ ID NO:20.
22. The fusion protein of claim 21, wherein the polyhydroxyalkanoate synthase protein subunit is at least 80% identical to SEQ ID NO:l 8 or SEQ ID NO:20.
23. The fusion protein of claim 22, wherein the polyhydroxyalkanoate synthase protein subunit is at least 90% identical to SEQ ID NO: 18 or SEQ ID NO:20.
24. The fusion protein of claim 23, comprising SEQ ID NO: 18 or SEQ ID NO:20.
25. A nucleic acid segment encoding a non-naturally occurring fusion protein, the nucleic acid segment comprising: a nucleic acid sequence encoding a peroxisome targeting protein subunit; and a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit.
26. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO: 13.
27. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is at least 70% identical to SEQ ID NO: 13.
28. The nucleic acid segment of claim 27, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is at least 80% identical to SEQ ID NO: 13.
29. The nucleic acid segment of claim 28, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is at least 90% identical to SEQ ID NO: 13.
30. The nucleic acid segment of claim 29, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is SEQ ID NO: 13.
31. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit hybridizes to SEQ ID NO: 13.
32. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit comprises at least a 6 contiguous nucleic acid sequence from: SEQ ID NO: 1 ; SEQ ID NO:3; SEQ ID NO: 15; or SEQ ID NO: 16.
33. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is at least 70% identical to:
SEQ ID NO: 1 ; SEQ ID NO:3;
SEQ ID NO: 15; or SEQ ID NO: 16.
34. The nucleic acid segment of claim 33, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is at least 80% identical to:
SEQ ID NO: 1 ; SEQ ID NO:3; SEQ ID NO: 15; or SEQ ID NO: 16.
35. The nucleic acid segment of claim 34, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is at least 90% identical to:
SEQ ID NO: 1 ; SEQ ID NO:3; SEQ ID NO: 15; or
SEQ ID NO: 16.
36. The nucleic acid segment of claim 35, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is:
SEQ ID NO: 1; SEQ ID NO:3; s SEQ ID NO: 15; or
SEQ ID NO:16.
37. The nucleic acid segment of claim 36, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is:
SEQ ID NO: 15; or o SEQ ID NO:16.
38. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit hybridizes to:
SEQ ID NO: 1; s SEQ ID NO:3;
SEQ ID NO: 15; or SEQ ID NO: 16.
39. The nucleic acid segment of claim 25, wherein the peroxisome targeting protein 0 subunit is PTS2.
40. The nucleic acid segment of claim 25, wherein the peroxisome targeting protein subunit comprises a tripeptide, the tripeptide having: a first amino acid in the N-terminus to C-terminus direction being S, A, or P; 5 a second amino acid in the N-terminus to C-terminus direction being K, R, S, or H; and a third amino acid in the N-terminus to C-terminus direction being L, M, I, or F.
41. The nucleic acid segment of claim 40, wherein the peroxisome targeting subunit 30 comprises ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
42. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes at least a 5 contiguous amino acid sequence from:
SEQ ID NO:2; or SEQ ID NO:4.
43. The nucleic acid segment of claim 25, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes an amino acid sequence at least about 70% identical to: SEQ ID NO:2; or
SEQ ID NO:4.
44. The nucleic acid segment of claim 43, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes an amino acid sequence at least about 80% identical to:
SEQ ID NO:2; or SEQ ID NO:4.
45. The nucleic acid segment of claim 44, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes an amino acid sequence at least about 90% identical to:
SEQ ID NO:2; or
SEQ ID NO:4.
46. The nucleic acid segment of claim 45, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes: SEQ ID NO:2; or SEQ ID NO:4.
47. A recombinant vector comprising in the 5' to 3' direction: a) a promoter that directs transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit. b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; and c) a 3' transcription terminator.
48. The recombinant vector of claim 47, further comprising a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of RNA transcribed from the structural nucleic acid coding sequence.
49. The recombinant vector of claim 47, further comprising a selectable marker.
50. The recombinant vector of claim 49, wherein the selectable marker is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker.
51. The recombinant vector of claim 47, wherein the promoter is constitutive.
52. The recombinant vector of claim 51, wherein the promoter is CaMV35S, enhanced CaMV35S, FMV, mas, nos, or ocs.
53. The recombinant vector of claim 47, wherein the promoter is inducible.
54. The recombinant vector of claim 53, wherein the promoter is tac, salicylic acid induced, polyacrylic acid induced, safener induced, heat shock promoter, nitrate induced, hormone induced, or light induced.
55. The recombinant vector of claim 47, wherein the promoter is tissue specific.
56. The recombinant vector of claim 55, wherein the promoter is the β-conglycinin 7S promoter, napin promoter, phaseolin promoter, zein promoter, soybean trypsin inhibitor promoter, ACP promoter, stearoyl-ACP desaturase promoter, or oleosin promoter.
57. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit comprises at least a 6 contiguous nucleic acid sequence from SEQ ID NO: 13.
58. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is at least 70% identical to SEQ ID NO: 13.
59. The recombinant vector of claim 58, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is at least 80% identical to SEQ ID NO: 13.
60. The recombinant vector of claim 59, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is at least 90% identical to SEQ ID NO: 13.
61. The recombinant vector of claim 60, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit is SEQ ID NO : 13.
62. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a peroxisome targeting protein subunit hybridizes to SEQ ID NO: 13.
63. The recombinant vector of claim 47, wherein the peroxisome targeting protein subunit is PTS2.
64. The recombinant vector of claim 47, wherein the peroxisome targeting protein subunit comprises a tripeptide, the tripeptide having: a first amino acid in the N-terminus to C-terminus direction being S, A, or P; a second amino acid in the N-terminus to C-terminus direction being K, R, S, or H; and a third amino acid in the N-terminus to C-terminus direction being L, M, I, or F.
65. The recombinant vector of claim 64, wherein the peroxisome targeting subunit comprises ARM, SRM, SKL, ARL, SRL, PSI, or PRM.
66. The recombinant vector of claim 47, wherein the polyhydroxyalkanoate synthase protein subunit is a Pseudomonas subunit.
67. The recombinant vector of claim 66, wherein the Pseudomonas subunit is a Pseudomonas aeruginosa subunit.
68. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit comprises at least a 6 contiguous nucleic acid sequence from:
SEQ ID NO: 1;
SEQ ID NO:3; SEQ ID NO: 15; or
SEQ ID NO: 16.
69. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is at least 70% identical to: SEQ ID NO: 1 ;
SEQ ID NO:3; SEQ ID NO: 15; or SEQ ID NO: 16.
70. The recombinant vector of claim 69, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is at least 80% identical to:
SEQ ID NO: 1;
SEQ ID NO:3;
SEQ ID NO: 15; or SEQ ID NO: 16.
71. The recombinant vector of claim 70, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is at least 90% identical to:
SEQ ID NO: 1 ; SEQ ID NO:3; SEQ ID NO: 15; or
SEQ ID NO: 16.
72. The recombinant vector of claim 71, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is: SEQ ID NO: 1;
SEQ ID NO-.3; SEQ ID NO: 15; or SEQ ID NO: 16.
73. The recombinant vector of claim 72, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit is: SEQ ID NO: 15; or SEQ ID NO: 16.
74. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit hybridizes to:
SEQ ID NO: 1;
SEQ ID NO:3;
SEQ ID NO: 15; or SEQ ID NO: 16.
75. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes at least a 5 contiguous amino acid sequence from: SEQ ID NO:2; or
SEQ ID NO:4.
76. The recombinant vector of claim 47, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes an amino acid sequence at least about 70% identical to:
SEQ ID NO:2; or SEQ ID NO:4.
77. The recombinant vector of claim 76, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes an amino acid sequence at least about 80% identical to: SEQ ID NO:2; or
SEQ ID NO:4.
78. The recombinant vector of claim 77, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes an amino acid sequence at least about 90% identical to: SEQ ID NO:2; or
SEQ ID NO:4.
79. The recombinant vector of claim 78, wherein the nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit encodes:
SEQ ID NO:2; or SEQ ID NO:4.
80. The recombinant vector of claim 47, wherein the structural nucleic acid sequence comprises:
SEQ ID NO: 17; or SEQ ID NO: 19.
81. The recombinant vector of claim 47, wherein the structural nucleic acid sequence encodes:
SEQ ID NO: 18; or SEQ ID NO:20.
82. A recombinant host cell comprising a nucleic acid segment encoding a non-naturally occurring fusion protein, wherein the nucleic acid segment comprises: a nucleic acid sequence encoding a peroxisome targeting protein subunit; and a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit.
83. The recombinant host cell of claim 82, wherein the recombinant host cell is a fungal cell.
84. The recombinant host cell of claim 83, wherein the fungal cell is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell.
85. The recombinant host cell of claim 82, wherein the recombinant host cell is a plant cell.
86. The recombinant host cell of claim 85, wherein the plant cell is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
87. The recombinant host cell of claim 82, further comprising a nucleic acid segment encoding an acyl-ACP thioesterase.
88. The recombinant host cell of claim 82, further comprising a nucleic acid segment encoding a fatty acyl hydroxylase.
89. The recombinant host cell of claim 82, further comprising a nucleic acid segment encoding a yeast multifunctional protein (MFP).
90. The recombinant host cell of claim 82, further comprising a nucleic acid segment encoding a hydroxyacyl-CoA epimerase.
91. A genetically transformed plant cell comprising in the 5' to 3' direction: a) a promoter to direct transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) a 3' transcription terminator sequence; and d) a 3' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of RNA transcribed from the structural nucleic acid coding sequence.
92. The genetically transformed plant cell of claim 91, wherein the plant cell is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
93. The genetically transformed plant cell of claim 91, further comprising a nucleic acid segment encoding an acyl-ACP thioesterase.
94. The genetically transformed plant cell of claim 91, further comprising a nucleic acid segment encoding a fatty acyl hydroxylase.
95. The genetically transformed plant cell of claim 91, further comprising a nucleic acid segment encoding a yeast multifunctional protein (MFP).
96. The genetically transformed plant cell of claim 91, further comprising a nucleic acid segment encoding a hydroxyacyl-CoA epimerase.
97. A genetically transformed plant comprising in the 5' to 3' direction: a) a promoter to direct transcription of a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; b) a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) a 3' transcription terminator sequence; and d) a 3 ' polyadenylation signal sequence that directs the addition of polyadenylate nucleotides to the 3' end of RNA transcribed from the structural nucleic acid coding sequence.
98. The genetically transformed plant of claim 97, wherein the plant is an an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant.
99. The genetically transformed plant of claim 97, wherein the promoter is constitutive.
100. The genetically transformed plant of claim 99, wherein the promoter is CaMV35S, enhanced CaMV35S, FMV, mas, nos, or ocs.
101. The genetically transformed plant of claim 97, wherein the promoter is inducible.
102. The genetically transformed plant of claim 101, wherein the promoter is tac, salicylic acid induced, polyacrylic acid induced, safener induced, heat shock promoter, nitrate induced, hormone induced, or light induced.
103. The genetically transformed plant of claim 97, wherein the promoter is tissue specific.
104. The genetically transformed plant of claim 103, wherein the promoter is the β- conglycinin 7S promoter, napin promoter, phaseolin promoter, zein promoter, soybean trypsin inhibitor promoter, ACP promoter, stearoyl-ACP desaturase promoter, or oleosin promoter.
105. The genetically transformed plant of claim 97, further comprising a nucleic acid segment encoding an acyl-ACP thioesterase.
106. The genetically transformed plant of claim 97, further comprising a nucleic acid segment encoding a fatty acyl hydroxylase.
107. The genetically transformed plant of claim 97, further comprising a nucleic acid segment encoding a yeast multifunctional protein (MFP).
108. The genetically transformed plant of claim 97, further comprising a nucleic acid segment encoding a hydroxyacyl-CoA epimerase.
109. A method of preparing host cells useful to produce a non-naturally occurring fusion protein comprising the steps of: a) selecting a host cell b) transforming the selected host cell with a recombinant vector having a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; and c) obtaining transformed host cells.
110. The method of claim 109, wherein the vector further comprises a selectable marker.
111. The method of claim 110, wherein the selectable marker is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker.
112. The method of claim 109, wherein the host cell is a fungal cell.
1 13. The method of claim 1 12, wherein the fungal cell is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell.
114. The method of claim 109, wherein the host cell is a plant cell.
1 15. The method of claim 1 14, wherein the plant cell is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
116. A method of preparing a transformed plant useful to produce a non-naturally occurring fusion protein comprising the steps of: a) selecting a host plant cell b) transforming the selected host plant cell with a recombinant vector having a structural nucleic acid sequence encoding a non-naturally occurring fusion protein, wherein the structural nucleic acid sequence comprises: i) a nucleic acid sequence encoding a peroxisome targeting protein subunit; and ii) a nucleic acid sequence encoding a polyhydroxyalkanoate synthase protein subunit; c) obtaining transformed host plant cells; and d) regenerating the transformed host plant cells.
117. The method of claim 116, wherein the vector further comprises a selectable marker.
1 18. The method of claim 1 17, wherein the selectable marker is a kanamycin resistance marker, a hygromycin resistance marker, or a herbicide resistance marker.
119. The method of claim 1 16, wherein the host plant cell is an an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
120. The plant produced by the method of claim 116.
121. A method for the preparation of a polyhydroxyalkanoate, comprising the steps of: a) obtaining a cell capable of producing a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; b) establishing a culture of the cell; and c) culturing the cell under conditions suitable for the production of the polyhydroxyalkanoate.
122. The method of claim 121, wherein the culture contains natural fatty acids, non- natural fatty acids, or mixtures thereof.
123. The method of claim 121, wherein the cell is a fungal cell.
124. The method of claim 123, wherein the fungal cell is a Schizosaccharomyces pombe, Streptomyces rimofaciens, Fusarium, Aspergillus niger, or Saccharomyces cerevisiae cell.
125. The method of claim 121, wherein the cell is a plant cell.
126. The method of claim 125, wherein the cell is an an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat cell.
127. The method of claim 121 , wherein the polyhydroxyalkanoate comprises 3- hydroxyhexanoic acid (H:6), 3-hydroxyoctanoic acid (H:8), 3 -hydroxy decanoic acid (H:10), 3-hydroxydodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3- hydroxyhexadecanoic acid (H:16), 3-hydroxyheptanoic acid (H:7), 3- hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3- hydroxytridecanoic acid (H:13), 3 -hydroxy hexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2), 3-hydroxyhexadecenoic acid (H16:l), 3- hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid (H14:2), 3- hydroxytetradecenoic acid (H14:l), 3 -hydroxy dodecadienoic acid (H12:2), 3- hydroxydodecenoic acid (H12:l), 3 -hydroxy octenoic acid (H8:l), 4- hydroxydecanoic acid, 8-methyl-3-hydroxynonanoic acid, or 6-methyl-3- hydroxyheptanoic acid monomers.
128. A method for the preparation of a polyhydroxyalkanoate, comprising the steps of: a) obtaining a plant capable of producing a non-naturally occurring fusion protein, wherein the fusion protein comprises: i) a peroxisome targeting protein subunit; and ii) a polyhydroxyalkanoate synthase protein subunit; and b) growing the plant under conditions suitable for the production of the polyhydroxyalkanoate.
129. The method of claim 128, further comprising supplementing the plant with natural fatty acids, non-natural fatty acids, or mixtures thereof.
130. The method of claim 128, wherein the plant is an alfalfa, banana, barley, bean, cabbage, canola/oilseed rape, carrot, castorbean, celery, clover, coconut, corn, cotton, cucumber, linseed, melon, olive, palm, parsnip, pea, peanut, pepper, potato, potato, radish, rapeseed, rice, soybean, spinach, sunflower, tobacco, tomato, or wheat plant.
131. The method of claim 128, wherein the polyhydroxyalkanoate comprises 3- hydroxyhexanoic acid (H:6), 3 -hydroxy octanoic acid (H:8), 3-hydroxydecanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3-hydroxytetradecanoic acid (H:14), 3- hydroxyhexadecanoic acid (H:16), 3 -hydroxyheptanoic acid (H:7), 3- hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3- hydroxytridecanoic acid (H:13), 3-hydroxyhexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2). 3-hydroxyhexadecenoic acid (H16:l), 3- hydroxytetradecatrienoic acid (HI 4:3), 3-hydroxytetradecadienoic acid (HI 4:2), 3- hydroxytetradecenoic acid (H14:l), 3 -hydroxy dodecadienoic acid (H12:2), 3- hydroxydodecenoic acid (HI 2:1), 3-hydroxyoctenoic acid (H8:l), 4- hydroxydecanoic acid, 8-methyl-3-hydroxynonanoic acid, or 6-methyl-3- hydroxyheptanoic acid monomers.
132. A plant containing a polyhydroxyalkanoate, wherein the polyhydroxyalkanoate comprises 3-hydroxyhexanoic acid (H:6), 3-hydroxyoctanoic acid (H:8), 3- hydroxydecanoic acid (H:10), 3 -hydroxy dodecanoic acid (H:12), 3- hydroxytetradecanoic acid (H:14), 3 -hydroxy hexadecanoic acid (H:16), 3- hydroxyheptanoic acid (H:7), 3-hydroxynonanoic acid (H9), 3-hydroxyundecanoic acid (H:l l), 3-hydroxytridecanoic acid (H:13), 3 -hydroxy hexadecatrienoic acid (HI 6:3), 3 -hydroxyhexadecadienoic acid (HI 6:2), 3 -hydroxy hexadecenoic acid (H16:l), 3-hydroxytetradecatrienoic acid (H14:3), 3-hydroxytetradecadienoic acid
(H14:2), 3-hydroxytetradecenoic acid (H14:l), 3-hydroxydodecadienoic acid (H12:2), 3 -hydroxydodecenoic acid (H12:l), 3 -hydroxy octenoic acid (H8:l), 4- hydroxydecanoic acid, 8-methyl-3-hydroxynonanoic acid, or 6-methyl-3- hydroxyheptanoic acid monomers.
133. A polyhydroxyalkanoate comprising 3-hydroxyhexadecatrienoic acid (H16:3), 3- hydroxyhexadecadienoic acid (H16:2), 3-hydroxytetradecatrienoic acid (H14:3), or 3 -hydroxy dodecadienoic acid (HI 2:2) monomers.
PCT/US1998/000083 1998-01-05 1998-01-05 Biosynthesis of medium chain length polyhydroxyalkanoates Ceased WO1999035278A1 (en)

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