WO1998001572A1 - Genetische transformation von ciliatenzellen durch microcarrier- bombardement mit dna-beladenen goldpartikeln - Google Patents
Genetische transformation von ciliatenzellen durch microcarrier- bombardement mit dna-beladenen goldpartikeln Download PDFInfo
- Publication number
- WO1998001572A1 WO1998001572A1 PCT/EP1997/003472 EP9703472W WO9801572A1 WO 1998001572 A1 WO1998001572 A1 WO 1998001572A1 EP 9703472 W EP9703472 W EP 9703472W WO 9801572 A1 WO9801572 A1 WO 9801572A1
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- WIPO (PCT)
- Prior art keywords
- dna
- ciliate
- heterologous dna
- cells
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/87—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation
- C12N15/89—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation using microinjection
- C12N15/895—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation using microinjection using biolistic methods
Definitions
- the present invention relates to a method for expressing a heterologous DNA in a new expression system or host.
- Ciliates are unicellular, animal eukaryotes. They have almost all the typical properties of eukaryotic cells and at the same time offer the advantage that they can be cultured in a similar way to prokaryotes. This means that genetically identical clones can be grown from individual cells by vegetative propagation. In some species, very high cell densities can be achieved in continuous or batch culture.
- ciliates like most eukaryotes, can reproduce sexually. Sexual reproduction, called conjugation in the ciliates, can be induced by bringing together cells of different mating types (mating types are "multiple sexes") under suitable conditions. This property offers the advantage that one can cross ciliates like higher eukaryotes and thereby e.g. Can generate strains that are homozygous for selected traits.
- ciliates In addition to the characteristics typical of most eukaryotes, ciliates have a number of structural and functional features that make them particularly suitable for basic cell biological research as well as for biotechnological applications. Almost all ciliate cells contain two different types of cell nuclei: small, transcription-inactive, mostly diploid micronuclei and mostly very large, DNA-rich macronuclei.
- the micronuclei mainly have generative functions, which means that in the course of conjugation, haploid gamete nuclei develop from them through meiosis.
- the gamete nuclei of two conjugation partners can fuse to form zygote nuclei and create a new cell generation with genetically recombined micronucleus genomes.
- the macronuclei control all somatic processes of the cells. Your genome is transcribed permanently. In the course of macronucleus development, drastic elimination and reorganization processes take place in the genome. In some species, up to 98% of the micronucleus genome is eliminated, intervening sequences are cut out of genes and coding regions can be rearranged completely ("gane scrambling"). In all ciliates examined there, the genes in the macronucleus are more or less strongly amplified. The number of copies can be up to several million, depending on the gene under consideration and the type of ciliate.
- telomeres the end structures of linear DNA molecules and the telomerase ⁇ synthesizing them was first elucidated in ciliates (Blackbum, E.H. (1991): Nature 350, 569-573). It was later shown that these basic processes and structures, which were initially discovered in ciliates due to the special genome structure, are also characteristic of almost all other eukaryotes, are only much more difficult to discover and investigate there.
- Ciliates are unicellular eukaryotes that can be grown in clonal cultures like prokaryotic microorganisms in high cell density with relatively short generation times. 2. Your cells have almost all eukaryotic properties, the prokaryotes are missing, for example in the area of DNA replication, transcription and processing, translation, cytoskeleton and membrane structures, endo- and exocytosis processes, etc.
- ciliates are highly developed eukaryotes that branch off late from the common family tree, their enzymes, structural and membrane proteins and their metabolic pathways are much more similar to the corresponding structures and processes in multicellular eukaryotes (eg humans) than in comparable structures and processes Prokaryotes (bacteria) is the case if there are homologous elements at all.
- heterologous genes or modified genes specific to the species has so far mainly failed because the usual methods available for the transformation of eukaryotes led to sufficiently high transformation rates in ciliates only in a few exceptional cases (Gaertig, J., M. Goravsky (1992 ): Proc. Natl. Acad. Sci. USA 89, 9196-9200).
- there have so far been hardly any suitable selection markers available for attempting transformations with ciliates since some marker systems which are generally used successfully for eukaryotic transformations cannot be used in ciliates (Wünning, IU, Lipps, HJ (1983): EMBO J.2, 1753-1757; Meyers, G., E. Helftenbein (1988 ): Gene 63, 31-40).
- microcarrier bombardment method can be used to transform plant cells surrounded by a rigid and rigid cell wall very effectively (Boynton, JE, NW Gillham, EH Harris, JP Hosler, AM Johnson, AR Jones, BL Randolp-Anderson, D. Robertson, TM Klein, KB Shark, JC Sanford (1988): Science 240, 1534-1537; Klein, TM, L. Kornstein, JC Sanford, ME Fromm (1989): Plant Physiol. 91, 440 -444; Klein, TM, ED Wolf, R. Wu, JC Sanford (1987): Nature 327, 70-73).
- the object of the present invention is to provide a method for expressing a heterologous DNA in a new expression system or host.
- the object is achieved by independent claims 1 and 17 and in particular by the preferred embodiments of subclaims 2 to 16
- the present invention relates to a method for expressing a heterologous DNA in an expression system, characterized in that transformed ciliate cells are used as the expression system
- heterologous DNA sequence is a gene
- ori oil of relication
- ciliate cells are selected from the group Holotrichia, Peritrichia, Spirotrichia and Suctoria.
- ciliate cells are selected from the group Tetrahymena, Paramecium, Colpidium, Colpoda, Glaucoma, Platyophrya, Vorticella, Potomacus, Pseudocohnilembus, Euplotes, Engelmaniella and Stylonychia
- ciliate according to claim 17 characterized in that the transformation was carried out by means of the method of microcarrier bombardment with DNA-loaded gold particles
- a promoter which is active in ciliates and causes the transcription of the heterologous DNA to be expanded
- a termination signal that ends the transcription and is active in ciliates
- a suitable ori origin of the
- step (b) transformation of the ciliate cells with the expression vector according to step (a).
- the expression vector additionally contains a signal sequence which leads to the removal of the gene product from the cell.
- the expression vector additionally contains a signal sequence which leads to the removal of the gene product from the cell.
- Gold particles (1.6 ⁇ m diameter) are suspended at 40 mg / ml in water. 25 ⁇ l of the particle suspension are mixed with 5 ⁇ l DNA solution (conc. 1 ⁇ g / ⁇ l in TE buffer), 25 ⁇ l 2.5 M CaCl 2 solution, 20 ⁇ l 0.1 M spermidine solution under previous tax. After incubation at room temperature for 10 min, the particles are sedimented by centrifugation in the minifuge (12000 rpm). 50 ⁇ l of the supernatant are removed and discarded, the rest is resuspended. 3 ⁇ l of this are pipetted onto the membrane (rupture disk) for the bombardment.
- the plasmid pRT103gus was used for the transformation. It carries ampicillin resistance, the 35S promoter of the Cauliflower Mosaic virus, the coding region of the ß-glucuronidase gene from E. coli and a polyadenylation signal and is successfully used to transform plants.
- BIO-RAD BIOLISTIC Particle Delivery System
- the substrate for the glucuronidase 25 mg of 5-bromo-4-chloro-3-indolyl-glucuronide are dissolved in 4 ml of DMSO and 40 ml of 10 mM EDTA, 100 mM sodium phosphate buffer pH 7.0, 0.1% Triton.
- the transformed ciliate cells were collected by filtration on a filter two days after the transformation experiment.
- the filters with the ciliate cells were incubated in the substrate solution at 32 ° C.
- the cells are partially lysed by the Triton-containing solution.
- Cells that express the transformed glucuronidase gene can be recognized by a clear blue color after a short time. Non-transformed, but otherwise treated control cells show no blue color even after incubation for several hours.
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- Genetics & Genomics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- General Engineering & Computer Science (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Biomedical Technology (AREA)
- Microbiology (AREA)
- Plant Pathology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50474898A JP2001510327A (ja) | 1996-07-03 | 1997-07-02 | Dnaを装填した金粒子を用いるミクロキャリヤーボンバードメントによる繊毛虫細胞の遺伝的形質転換 |
| US09/029,444 US6087124A (en) | 1996-07-03 | 1997-07-02 | Genetic transformation of ciliate cells through microcarrier bombardment with DNA-loaded gold particles |
| EP97930486A EP0847444A1 (de) | 1996-07-03 | 1997-07-02 | Genetische transformation von ciliatenzellen durch microcarrier- bombardement mit dna-beladenen goldpartikeln |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19626564A DE19626564A1 (de) | 1996-07-03 | 1996-07-03 | Genetische Transformation von Ciliatenzellen durch Microcarrier-Bombardement mit DNA beladenen Goldpartikeln |
| DE19626564.9 | 1996-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998001572A1 true WO1998001572A1 (de) | 1998-01-15 |
Family
ID=7798683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1997/003472 Ceased WO1998001572A1 (de) | 1996-07-03 | 1997-07-02 | Genetische transformation von ciliatenzellen durch microcarrier- bombardement mit dna-beladenen goldpartikeln |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6087124A (de) |
| EP (1) | EP0847444A1 (de) |
| JP (1) | JP2001510327A (de) |
| DE (1) | DE19626564A1 (de) |
| WO (1) | WO1998001572A1 (de) |
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| WO2003020914A2 (en) | 2001-09-05 | 2003-03-13 | Basf Plant Science Gmbh | Protein phosphatase stress-related polypeptides and methods of use in plants |
| WO2003040344A2 (en) | 2001-11-09 | 2003-05-15 | Basf Plant Science Gmbh | Transcription factor stress-related polypeptides and methods of use in plants |
| WO2003078629A1 (de) | 2002-03-20 | 2003-09-25 | Basf Plant Science Gmbh | Konstrukte und verfahren zur regulation der genexpression |
| EP1350838A1 (de) * | 2002-03-30 | 2003-10-08 | Nutrinova Nutrition Specialties & Food Ingredients GmbH | Expression von rekombinanten humanen Proteinen in Tetrahymena |
| WO2004076617A2 (de) | 2003-02-27 | 2004-09-10 | Basf Plant Science Gmbh | Verfahren zur herstellung mehrfach ungesättigter fettsäuren |
| WO2004092398A2 (en) | 2003-04-15 | 2004-10-28 | Basf Plant Science Gmbh | Nucleic acid sequences encoding proteins associated with abiotic stress response and plant cells and plants with increased tolerance to environmental stress |
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| WO2007087815A2 (en) | 2004-12-17 | 2007-08-09 | Metanomics Gmbh | Process for the control of production of fine chemicals |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000023604A1 (de) * | 1998-10-21 | 2000-04-27 | Celanese Ventures Gmbh | Expressionsvektoren enthaltend regulative sequenzen aus stylonychia lemnae zur heterologen proteinexpression in eukaryontischen protisten und ein verfahren zur identifizierung solcher regulativen sequenzen |
| KR20020028419A (ko) * | 2000-10-10 | 2002-04-17 | 서만석 | 유전자 또는 유전자 백신의 전달방법 |
| GB201003701D0 (en) | 2010-03-05 | 2010-04-21 | Cilian Ag | System for the expression of a protein |
| CN106070081A (zh) * | 2016-07-08 | 2016-11-09 | 扬州大学 | 一种用于室内人工饲养襀翅目昆虫的方法 |
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| DE59510951D1 (de) * | 1994-10-21 | 2004-11-11 | Nutrinova Gmbh | Verfahren zur Kultivierung lipidabhängiger Tetrahymeniden und ein Verfahren zur Herstellung von biogenen Wertstoffen aus lipidabhängigen Tetrahymeniden |
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- 1997-07-02 EP EP97930486A patent/EP0847444A1/de not_active Withdrawn
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- 1997-07-02 JP JP50474898A patent/JP2001510327A/ja active Pending
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| Publication number | Publication date |
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| DE19626564A1 (de) | 1998-01-08 |
| US6087124A (en) | 2000-07-11 |
| EP0847444A1 (de) | 1998-06-17 |
| JP2001510327A (ja) | 2001-07-31 |
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