CN1510047A - Polypeptide-human guanine mutual change factor 12 and polynucleotide for encoding said polypeptide - Google Patents

Abstract

A novel polypeptide-human guanine intertransform factor 12, the polynucleotide for coding it, the process for preparing said polypeptide by DNA recombination, the application of said polypeptide in treating diseases, such as cancer, HIV infection, immunopathy, etc, the antagonist of said polypeptide and its medical action, and the application of said polynucleotide are disclosed.

Description

The polynucleotide of a kind of polypeptide-human guanine interconversion factor 12 and this peptide species of coding

Technical field

The invention belongs to biological technical field, specifically, the invention describes a kind of new polypeptide-human guanine interconversion factor 12, and the polynucleotide sequence of this polypeptide of encoding.The invention still further relates to the preparation method and the application of these polynucleotide and polypeptide.

Background technology

RCC1 is the guanine interconversion factor (Guanine Nucleotide Exchange Factors, GEFs) the proteinic characteristic function fragment of family's [claiming the mutual transfer factor of GDP/GTP (GDP/GTP Exchange Factor) again].This functional module has very high conservative property, comprises that (β-repeat), each tumor-necrosis factor glycoproteins contains the amino acid about 60 to seven groups of β-tumor-necrosis factor glycoproteinss, lines up two groups, forms duplex structure (tandem).The RCC1 family protein has and GDP/GTP-Ras bonded ability, thereby the regulation and control in participation cell mitogen cycle, one side of RCC1 family protein (one side) combines with Ran albumen (Ras-1ike GTP-binding protein) and is formed with active RCC1-Ran structure.

The super family of Ras genes involved is divided into Ras sample GTP enzyme Ras-GTPs, guanine interconversion factor GEFs and guanine separation factor GDIs three major types.The RCC1 functional domain is a guanine interconversion factor GEFs family albumen common functional fragment, and Mammals, the proteic member of GEFs has Vav, Sos, Ras-GRF, C3G, Ost, NET1, RCC1, Tiam, Pam, Ect2 and Ra1 GDs etc.The RCC1 corresponding gene is PRP20 in yeast, SRM1; In fruit BJ1.The molecular weight of this proteinoid is all more than 40K, and is closely related with cell mitogen.The proteic RCC1 functional domain of the existing GEFs of studies confirm that easily produces sudden change.

Ras and associated protein thereof are playing a key role aspect regulating cell hyperplasia, the differentiation.The RCC1 gene has participated in the adjusting in hyperplasia cycle as the proteic representative of guanine interconversion factor GEFs family and its homologous gene.

The inventor's polypeptide has the proteic constitutional features of GEFs family, as RCC1 functional domain etc., belongs to GEFs family, so called after GEFs12 infers that simultaneously it has similar biological function.

1. combine with chromatin, monitor hyperplasia cycle S phase dna replication dna, after S phase dna replication dna is finished, start mitotic division.

2. participate in mitosis anaphase, nuclear formation.

3.GTP the activity of enzyme, GDP combines with the non-activity state, forms active condition GTP, and GTP is as signal, regulating cell hyperplasia, differentiation.Participate in gene transcription, the splicing of mRNA and 3-end form.

Because human guanine interconversion factor 12 albumen play an important role in the body critical function as mentioned above, and believe and relate to a large amount of albumen in these regulate processes, thereby need to identify human guanine interconversion factor 12 albumen of more these processes of participation in this area always, particularly identify this proteic aminoacid sequence.The separation of new human guanine interconversion factor 12 protein coding genes also provides the foundation for determining the effect of this albumen under healthy and morbid state.This albumen may constitute the basis of exploitation medical diagnosis on disease and/or curative, and it is very important therefore separating its coding DNA.

Summary of the invention

An object of the present invention is to provide the isolating new polypeptide-human guanine interconversion factor 12 with and fragment, analogue and derivative.

Another object of the present invention provides the polynucleotide of this polypeptide of coding.

Another object of the present invention provides the recombinant vectors of the polynucleotide that contain coding human guanine interconversion factor 12.

Another object of the present invention provides the genetically engineered host cell of the polynucleotide that contain coding human guanine interconversion factor 12.

Another object of the present invention provides the method for producing human guanine interconversion factor 12.

Another object of the present invention provides the antibody at the polypeptide-human guanine interconversion factor 12 of the present invention.

The present invention relates to a kind of isolated polypeptide, this polypeptide is the people source, and it comprises: have＜polypeptide or its examples of conservative variations, bioactive fragment or the derivative of 210〉2 aminoacid sequences.Preferably, this polypeptide is to have＜polypeptide of 210〉2 aminoacid sequences.

The present invention relates to a kind of carrier that contains polynucleotide of the present invention, particularly expression vector in addition; The host cell that this carrier of a kind of usefulness is genetically engineered comprises the host cell of conversion, transduction or transfection; A kind of method for preparing polypeptide of the present invention of cultivating described host cell and reclaiming expression product that comprises.

The invention still further relates to a kind of can with polypeptid specificity bonded antibody of the present invention.

The invention still further relates to a kind of simulation, activation, antagonism of screening or suppress the method for the compound of human guanine interconversion factor 12 protein-actives, it comprises and utilizes polypeptide of the present invention.The invention still further relates to the compound that obtains with this method.

Others of the present invention are because disclosing of the technology of this paper is conspicuous to those skilled in the art.

The invention provides a kind of polypeptide-human guanine interconversion factor 12, it is basically by＜210〉aminoacid sequence shown in 2 forms.Polypeptide of the present invention can be recombinant polypeptide, natural polypeptides, synthetic polypeptide, preferred recombinant polypeptide.Polypeptide of the present invention can be the product of natural purifying, or the product of chemosynthesis, or uses recombinant technology to produce from protokaryon or eucaryon host (for example, bacterium, yeast, higher plant, insect and mammalian cell).The host used according to the recombinant production scheme, polypeptide of the present invention can be glycosylated, maybe can be nonglycosylated.Polypeptide of the present invention also can comprise or not comprise initial methionine residues.

The present invention also comprises fragment, derivative and the analogue of human guanine interconversion factor 12.As used herein, term " fragment ", " derivative " and " analogue " are meant biological function or the active polypeptide that keeps human guanine interconversion factor of the present invention 12 identical basically.The fragment of polypeptide of the present invention, derivative or analogue can be: (I) a kind of like this, wherein one or more amino-acid residues are replaced by conservative or non-conservative amino acid residues (preferably conservative amino acid residues), and the amino acid that replaces can be also can not encoded by genetic codon; Perhaps (II) is a kind of like this, and certain group on wherein one or more amino-acid residues is replaced by other group and comprises substituting group; Perhaps (III) is a kind of like this, and wherein mature polypeptide and another kind of compound (such as the compound that prolongs the polypeptide transformation period, for example polyoxyethylene glycol) merge; Perhaps (IV) is a kind of like this, wherein additional aminoacid sequence is integrated into mature polypeptide and the peptide sequence that forms (as leader sequence or secretion sequence or be used for the sequence or the proteinogen sequence of this polypeptide of purifying) by the elaboration of this paper, such fragment, derivative and analogue are considered within those skilled in the art's ken.

The invention provides isolating nucleic acid (polynucleotide), substantially by coding have＜polynucleotide of the polypeptide of 210〉2 aminoacid sequences form.Polynucleotide sequence of the present invention comprises＜210〉1 nucleotide sequence.Polynucleotide of the present invention are to find from the cDNA library of people's fetal brain tissue.

Polynucleotide of the present invention can be dna form or rna form.Dna form comprises the DNA of cDNA, genomic dna or synthetic.DNA can be strand or double-stranded.DNA can be coding strand or noncoding strand.The coding region sequence of encoding mature polypeptide can be identical with the coding region sequence shown in＜210〉1 or the varient of degeneracy.As used herein, " varient of degeneracy " are meant that in the present invention coding has＜210〉2 protein or polypeptide, but with the differentiated nucleotide sequence of coding region sequence shown in＜210〉1.

The polynucleotide of the mature polypeptide of coding＜210〉2 comprise: the encoding sequence that has only mature polypeptide; The encoding sequence of mature polypeptide and various additional code sequence; Encoding sequence of mature polypeptide (with optional additional code sequence) and non-coding sequence.

Term " polynucleotide of coded polypeptide " is meant polynucleotide that comprise this polypeptide of encoding and the polynucleotide that comprise additional code and/or non-coding sequence.

The invention still further relates to the varient of foregoing description polynucleotide, its coding has the polypeptide of identical aminoacid sequence or segment, analogue and the derivative of polypeptide with the present invention.The varient of these polynucleotide can be the allelic variant of natural generation or the varient that non-natural takes place.These nucleotide diversity bodies comprise and replace varient, deletion mutation body and insert varient.As known in the art, allelic variant is the replacement form of polynucleotide, and it may be replacement, disappearance or the insertion of one or more Nucleotide, but can be from not changing the function of its encoded polypeptides in fact.

The invention still further relates to and the polynucleotide (have at least 50% between two sequences, preferably have 70% homogeny) of sequence hybridization described above.The present invention be more particularly directed under stringent condition and the interfertile polynucleotide of polynucleotide of the present invention.In the present invention, " stringent condition " is meant: (1) than hybridization under low ionic strength and the comparatively high temps and wash-out, as 0.2 * SSC, and 0.1%SDS, 60 ℃; Or (2) hybridization the time adds and to use denaturing agent, as 50% (v/v) methane amide, 0.1% calf serum/0.1%Ficoll, 42 ℃ etc.; Or (3) only at the homogeny between the two sequences at least more than 95%, be more preferably 97% and just hybridize when above.And, the polypeptide of interfertile polynucleotide encoding and＜210〉and the mature polypeptide shown in 2 has identical biological function and activity.

The invention still further relates to nucleic acid fragment with sequence hybridization described above.As used herein, " nucleic acid fragment " length contain 10 Nucleotide at least, better be 20-30 Nucleotide at least, be more preferably 50-60 Nucleotide at least, preferably more than at least 100 Nucleotide.Nucleic acid fragment also can be used for the amplification technique (as PCR) of nucleic acid to determine and/or to separate the polynucleotide of coding human guanine interconversion factor 12.

Polypeptide among the present invention and polynucleotide preferably provide with isolating form, more preferably are purified to homogeneous.

The special polynucleotide sequence of coding human guanine interconversion factor 12 of the present invention can obtain with several different methods.For example, separate polynucleotide with hybridization technique well known in the art.These technology including, but not limited to: 1) with probe and genome or the hybridization of cDNA library to detect homologous polynucleotide sequence and 2) antibody screening of expression library to be to detect the polynucleotide passage of the clone with common structure feature.

Sequence dna fragment of the present invention also can obtain with following method: 1) separate double chain DNA sequence from genomic dna; 2) the chemical synthesising DNA sequence is to obtain the double-stranded DNA of described polypeptide.

In the above-mentioned method of mentioning, isolation of genomic DNA is least commonly used.The direct chemical of dna sequence dna is synthetic to be the method for often selecting for use.The more frequent method of selecting for use is the separation of cDNA sequence.The standard method that separates interested cDNA is from the donorcells separating mRNA of this gene of high expression level and carries out reverse transcription, forms plasmid or phage cDNA library.Extract the existing multiple proven technique of method of mRNA, test kit also can obtain (Qiagene) from commercial channels.And the construction cDNA library also is usual method (Sambrook, et al., Molecular Cloning, A LaboratoryManual, Cold Spring Harbor Laboratory.New York, 1989).Also can obtain the cDNA library of commercial offers, as the different cDNA library of Clontech company.When being used in combination the polymeric enzyme reaction technology, even few expression product also can be cloned.

Available ordinary method is screened gene of the present invention from these cDNA libraries.These methods include, but is not limited to: (1) DNA-DNA or DNA-RNA hybridization; (2) appearance of marker gene function or forfeiture; (3) level of the transcript of mensuration human guanine interconversion factor 12; (4), detect the protein product of genetic expression by immunological technique or mensuration biologic activity.Aforesaid method can singly be used, but also several different methods combined utilization.

In (1) kind method, hybridizing used probe is and any a part of homology of polynucleotide of the present invention that at least 10 Nucleotide of its length better are at least 30 Nucleotide, are more preferably at least 50 Nucleotide, preferably at least 100 Nucleotide.In addition, within 2000 Nucleotide, preferable is within 1000 Nucleotide to the length of probe usually.Probe used herein is the dna sequence dna of chemosynthesis on the basis of gene order information of the present invention normally.Gene of the present invention itself or fragment are certainly as probe.The mark of dna probe can be used radio isotope, fluorescein or enzyme (as alkaline phosphatase) etc.

In (4) kind method, detect the protein product of human guanine interconversion factor 12 genetic expressions and can use immunological technique such as Western blotting, radioimmunoprecipitation, enzyme-linked immunosorbent assay (ELISA) etc.

Use method (Saiki, the et al.Science 1985 of round pcr DNA amplification/RNA; 230:1350-1354) be optimized for acquisition gene of the present invention.When particularly being difficult to from the library, obtain the cDNA of total length, can preferably use RACE method (the terminal rapid amplifying method of RACE-cDNA), the primer that is used for PCR can suitably be selected according to polynucleotide sequence information of the present invention disclosed herein, and available ordinary method is synthetic.Available ordinary method is as the DNA/RNA fragment by gel electrophoresis separation and purifying amplification.

The gene of the present invention that obtains as mentioned above, perhaps the polynucleotide sequence of various dna fragmentations etc. can with ordinary method such as dideoxy chain termination (Sanger et al.PNAS, 1977,74:5463-5467) measure.This class polynucleotide sequence is measured also available commercial sequencing kit etc.In order to obtain the cDNA sequence of total length, order-checking need be carried out repeatedly.Sometimes need to measure a plurality of clones' cDNA sequence, just can be spliced into the cDNA sequence of total length.

The present invention also relates to comprise the carrier of polynucleotide of the present invention, and with carrier of the present invention or directly with the host cell of human guanine interconversion factor 12 encoding sequences through the genetically engineered generation, and the method that produces polypeptide of the present invention through recombinant technology.

Among the present invention, the polynucleotide sequence of coding human guanine interconversion factor 12 can be inserted in the carrier, contains the recombinant vectors of polynucleotide of the present invention with formation.Term " carrier " refers to that bacterial plasmid well known in the art, phage, yeast plasmid, vegetable cell virus, mammalian cell virus are as adenovirus, retrovirus or other carrier.The carrier of Shi Yonging includes but not limited in the present invention: and the expression vector based on the T7 promotor of in bacterium, expressing (Rosenberg, et al.Gene, 1987,56:125); The pMSXND expression vector of in mammalian cell, expressing (Lee and Nathans, J Bio Chem.263:3521,1988) and at the carrier that derives from baculovirus of expressed in insect cells.In a word, as long as can duplicate in host and stablize, any plasmid and carrier may be used to make up recombinant expression vector.A key character of expression vector is to contain replication origin, promotor, marker gene and translational control element usually.

Method well-known to those having ordinary skill in the art can be used to make up the dna sequence dna that contains coding human guanine interconversion factor 12 and the expression vector of suitable transcribing/translational control element.These methods comprise (Sambroook, et al.Molecular Cloning, a LaboratoryManual, cold Spring Harbor Laboratory.New York, 1989) such as extracorporeal recombinant DNA technology, DNA synthetic technology, the interior recombinant technologys of body.Described dna sequence dna can effectively be connected on the suitable promotor in the expression vector, and is synthetic to instruct mRNA.The representative example of these promotors has: colibacillary 1ac or trp promotor; The PL promotor of lambda particles phage; Eukaryotic promoter comprises LTRs and some other known may command gene expression promoter in prokaryotic cell prokaryocyte or eukaryotic cell or its virus of CMV immediate early promoter, HSV thymidine kinase promoter, early stage and late period SM40 promotor, retrovirus.Expression vector also comprises ribosome bind site that translation initiation is used and transcription terminator etc.Inserting enhancer sequence in carrier will make its transcribing in higher eucaryotic cells be enhanced.Enhanser is the cis acting factor that DNA expresses, and nearly 10 to 300 base pairs act on promotor transcribing with enhancing gene usually.Can for example be included in the SV40 enhanser of 100 to 270 base pairs of replication origin side in late period one, at the polyoma enhanser of replication origin side in late period one and adenovirus enhanser etc.

In addition, expression vector preferably comprises one or more selected markers, to be provided for selecting the phenotypic character of transformed host cells, cultivate Tetrahydrofolate dehydrogenase, neomycin resistance and the green fluorescent protein (GFP) of usefulness as eukaryotic cell, or be used for colibacillary tsiklomitsin or amicillin resistance etc.

Persons skilled in the art all know how to select appropriate carriers/transcriptional regulatory element (as promotor, enhanser etc.) and selected marker.

Among the present invention, the polynucleotide of coding human guanine interconversion factor 12 or the recombinant vectors that contains these polynucleotide can transform or transduce into host cell, contain the genetically engineered host cell of these polynucleotide or recombinant vectors with formation.Term " host cell " refers to prokaryotic cell prokaryocyte, as bacterial cell; Or eukaryotic cell such as low, as yeast cell; Or higher eucaryotic cells, as mammalian cell.Representative example has: intestinal bacteria, streptomyces; Bacterial cell such as Salmonella typhimurium; Fungal cell such as yeast; Vegetable cell; Insect cell such as fruit bat S2 or Sf9; Zooblast such as CHO, COS or Bowes melanoma cells etc.

Can carry out with routine techniques well known to those skilled in the art with dna sequence dna of the present invention or the recombinant vectors transformed host cell that contains described dna sequence dna.When the host was prokaryotic organism such as intestinal bacteria, the competent cell that can absorb DNA can be used CaCl in exponential growth after date results ₂Method is handled, and used step is well-known in this area.Alternative is to use MgCl ₂If desired, transforming also the method for available electroporation carries out.When the host is an eukaryote, can select following DNA transfection method for use: coprecipitation of calcium phosphate method, perhaps conventional mechanical method such as microinjection, electroporation, liposome packing etc.

By the recombinant DNA technology of routine, utilize polynucleotide sequence of the present invention to can be used to express or produce human guanine interconversion factor 12 (Science, 1984 of reorganization; 224:1431).In general following steps are arranged:

(1). with the polynucleotide (or varient) of coding of the present invention people human guanine interconversion factor 12, or with the recombinant expression vector that contains these polynucleotide proper host cell that transforms or transduce;

(2). in suitable medium, cultivate host cell;

(3). separation, protein purification from substratum or cell.

In step (2), according to used host cell, used substratum can be selected from various conventional substratum in the cultivation.Under the condition that is suitable for the host cell growth, cultivate.After host cell grows into suitable cell density, induce the promotor of selection with suitable method (as temperature transition or chemical induction), cell is cultivated for some time again.

In step (3), recombinant polypeptide can wrap and be expressed or be secreted into the extracellular in cell or on cytolemma.If desired, can utilize its physics, the separating by various separation methods with other characteristic and the albumen of purification of Recombinant of chemistry.These methods are well-known to those skilled in the art.These methods include, but are not limited to: conventional renaturation is handled, protein precipitant is handled (salt analysis method), centrifugal, the broken bacterium of infiltration, the combination of ultrasonication, super centrifugal, sieve chromatography (gel-filtration), adsorption chromatography, ion exchange chromatography, high performance liquid chromatography (HPLC) and other various liquid chromatography (LC) technology and these methods.

RCCl is the guanine interconversion factor (Guanine Nucleotide Exchange Factors, GEFs) the proteinic characteristic function fragment of family's [claiming the mutual transfer factor of GDP/GTP (GDP/GTP Exchange Factor) again].This functional module has very high conservative property, comprises that (β-repeat), each tumor-necrosis factor glycoproteins contains the amino acid about 60 to seven groups of β-tumor-necrosis factor glycoproteinss, lines up two groups, forms duplex structure (tandem).The RCC1 family protein has and GDP/GTP-Ras bonded ability, thereby the regulation and control in participation cell mitogen cycle, one side of RCC1 family protein (one side) combines with Ran albumen (Ras-like GTP-binding protein) and is formed with active RCC1-Ran structure.

Guanine interconversion factor GEFs is the subfamily of the super family of Ras genes involved.The RCC1 functional domain is a guanine interconversion factor GEFs family albumen common functional fragment, and the proteic RCC1 functional domain of the existing GEFs of studies confirm that easily produces sudden change.The RCC1 family protein has and GDP/GTP-Ras bonded ability, and is closely related with the regulation and control in cell mitogen cycle.

Ras and associated protein thereof are playing a key role aspect regulating cell hyperplasia, the differentiation.The RCC1 gene has participated in the adjusting in hyperplasia cycle as the proteic representative of guanine interconversion factor GEFs family and its homologous gene.

Therefore it is unusual that the proteic abnormal expression of GEFs family will produce mitotic division, causes the generation of various tumours; Also produce the unusual of growth and proliferation of cell, cause fetal development to reach dysplasia unusually.

This shows that the abnormal expression of human guanine interconversion factor 12 of the present invention will produce the especially various tumours of various diseases, fetal development disorders, dysplasia disease, these diseases include but not limited to:

The tumour of various tissues: fibrosarcoma, liposarcoma, leiomyosarcoma, the muscle rhabdomyosarcoma sarcoma, angiosarcoma, endometrial stromal sarcoma, osteosarcoma, chondrosarcoma, erythroleukemia, cancer of the stomach, liver cancer, lung cancer, the esophageal carcinoma, mammary cancer, leukemia, lymphoma, thyroid tumor, hysteromyoma, neuroblastoma, astrocytoma, ependymoma, glioma, colorectal carcinoma, malignant histocytosis, melanoma, teratoma, adrenal carcinoma, bladder cancer, osteocarcinoma, myelomatosis, bone marrow cancer, the cancer of the brain, uterus carcinoma, carcinoma of endometrium, carcinoma of gallbladder, colorectal carcinoma, thymus neoplasms nasal cavity and tumor of sinus of nose, nasopharyngeal carcinoma, laryngocarcinoma, tracheal neoplasm, mesothelioma of pleura, fibroma, lipoma, leiomyoma

Grow disorders: congenital miscarriage, cleft palate, prosopoanoschisis, the neck capsule, the neck fistula, deficiency of skeletal limb, the limbs dysdifferentiation, alimentary canal locking or narrow, ileal diverticulum, umbilical fistula, congenital umbillical bernia, congenital aganglionic megacolon, larynx tracheostenosis or locking, tracheo esophageal fistula, hyaline membrane disease, congenital pulmonary cyst, atelectasis, polycystic kidney, ectopical kidney, horse tellurium kidney, double ureter, urachal fistula, latent, congenital inguinal hernia, duplex uterus, vaginal atresia, hypospadia, hermaphroditism, atrial septal defect, ventricular septal defect, arterial trunk is separated unusual, aorta or pulmonic stenosis, pulmonic stenosis, patent ductus arteriosus, neural tube defect, congenital hydrocephalus, iridocoloboma, congenital cataract, congenital glaucoma or cataract, microphthalmia, congenital deafness, aural deformity, the Down syndromes

Dysplasia disease: mental retardation, cerebral plasy, cerebral dysgenesis, familial nuclei of cranial nerves underdevelopment syndromes, skin, fat and amyoplasia disease such as congenital cutis laxa, senium praecox, congenital dyskeratosis, various metabolic defects such as various amino acid metabolism defective disease, cretinism, nanism, the slow disease of sexual development

The abnormal expression of human guanine interconversion factor 12 of the present invention also will produce some heredity, blood disease such as erythroleukemia and disease of immune system etc.

The antagonist of polypeptide of the present invention and this polypeptide, agonist and inhibitor can be directly used in disease treatment, for example, can treat the especially various tumours of various diseases, fetal development disorders, dysplasia disease, some heredity, blood disease such as erythroleukemia and disease of immune system etc.

The present invention also provides SCREENED COMPOUND to identify the method that improves (agonist) or check the medicament of (antagonist) human guanine interconversion factor 12.Agonist improves human guanine interconversion factor 12 biological function such as stimulate cellular proliferation, and antagonist prevention disorder such as the various cancer relevant with cell hyperproliferation with treatment.For example, can in the presence of medicine, the film preparation of the mammalian cell or the expressing human guanine interconversion factor 12 be cultivated with human guanine interconversion factor 12 of mark.Measure the medicine raising then or check this interactional ability.

The antagonist of human guanine interconversion factor 12 comprises antibody, compound, acceptor disappearance thing and the analogue etc. that filter out.The antagonist of human guanine interconversion factor 12 can combine and eliminate its function with human guanine interconversion factor 12, or suppresses the generation of this polypeptide, or combines with the avtive spot of this polypeptide and to make this polypeptide can not bring into play biological function.

In screening during as the compound of antagonist, human guanine interconversion factor 12 can be added during bioanalysiss measure, determine to interactional influence between human guanine interconversion factor 12 and its acceptor whether compound is antagonist by measuring compound.With the same quadrat method of above-mentioned SCREENED COMPOUND, can filter out the acceptor disappearance thing and the analogue of antagonist action.Can be incorporated into the rondom polypeptide storehouse that solid formation forms by the various amino acid that may make up by screening with human guanine interconversion factor 12 bonded peptide molecules obtains.During screening, generally tackle human guanine interconversion factor 12 molecules and carry out mark.

The invention provides and use polypeptide, and fragment, derivative, analogue or their cell are as the method for antigen with production antibody.These antibody can be polyclonal antibody or monoclonal antibody.The present invention also provides the antibody at human guanine interconversion factor 12 antigenic determinants.These antibody include, but is not limited to: the fragment that polyclonal antibody, monoclonal antibody, chimeric antibody, single-chain antibody, Fab fragment and Fab expression library produce.

The method of the available human guanine interconversion factor 12 direct injection immune animals of the production of polyclonal antibody (as rabbit, mouse, rat etc.) obtains, and multiple adjuvant can be used for the enhancing immunity reaction, includes but not limited to freund's adjuvant etc.The technology of the monoclonal antibody of preparation human guanine interconversion factor 12 include but not limited to hybridoma technology (Kohler andMilstein.Nature, 1975,256:495-497), three knurl technology, people B-quadroma technology, EBV-hybridoma technology etc.With the variable region bonded chimeric antibody in human constant region and inhuman source can with existing technology production (Morrison et al, PNAS, 1985,81:6851).And the technology of existing manufacture order chain antibody (U.S.PatNo.4946778) also can be used for producing the single-chain antibody of anti-human guanine interconversion factor 12.

The antibody of anti-human guanine interconversion factor 12 can be used in the immunohistochemistry technology, detects human guanine interconversion factor 12 in the biopsy specimen.

With the also available labelled with radioisotope of human guanine interconversion factor 12 bonded monoclonal antibodies, inject in the body and can follow the tracks of its position and distribution.This radiolabeled antibody can be used as a kind of atraumatic diagnostic method and is used for the location of tumour cell and has judged whether transfer.

Antibody also can be used for designing the immunotoxin at a certain privileged sites in the body.As the monoclonal antibody of human guanine interconversion factor 12 high-affinities can with bacterium or plant poison (as diphtheria toxin, ricin, abrine etc.) covalent attachment.A kind of usual method is with sulfydryl linking agent such as SPDP, attacks the amino of antibody, by the exchange of disulfide linkage, toxin is incorporated on the antibody, and this hybrid antibody can be used for killing into the guanine interconversion factor 12 positive cells.

The disease that antibody among the present invention can be used for treating or prevention and human guanine interconversion factor 12 are relevant.The antibody that gives suitable dosage can stimulate or block the generation or the activity of human guanine interconversion factor 12.

The invention still further relates to diagnostic testing process quantitative and detection and localization human guanine interconversion factor 12 levels.These tests are known in the art, and comprise that FISH measures and radioimmunoassay.The human guanine interconversion factor that detected in test 12 levels can be with laying down a definition the importance of human guanine interconversion factor 12 in various diseases and be used to the disease of diagnosing human guanine interconversion factor 12 to work.

Polypeptide of the present invention also can be used as the peptide spectrum analysis, for example, the polypeptide available physical, chemistry or enzyme carry out the specificity cutting, and carries out the two-dimentional or three-dimensional gel electrophoresis analysis of one dimension, be more preferably and carry out mass spectroscopy.

The polynucleotide of coding human guanine interconversion factor 12 also can be used for multiple therapeutic purpose.Gene therapy technology can be used for treating because cell proliferation, growth or the metabolic disturbance due to the nothing expression of human guanine interconversion factor 12 or the unusual/non-activity expression.The gene therapy vector (as virus vector) of reorganization can be designed for human guanine interconversion factor 12 of expressing variation, to suppress endogenic human guanine interconversion factor 12 activity.For example, a kind of human guanine interconversion factor 12 of variation can be human guanine interconversion factor 12 that shortens, lacked signal conduction function territory, though can combine with the substrate in downstream, lacks signaling activity.Therefore the gene therapy vector of reorganization can be used for treating the disease of 12 expression of human guanine interconversion factor or active caused by abnormal.Deriving from viral expression vector such as retrovirus, adenovirus, adeno-associated virus (AAV), hsv, parvovirus etc. can be used for the polynucleotide of coding human guanine interconversion factor 12 are transferred in the cell.The method of recombinant viral vector that structure carries the polynucleotide of coding human guanine interconversion factor 12 is found in existing document (Sambrook, et al.).The polynucleotide of reorganization coding human guanine interconversion factor 12 can be packaged in the liposome and be transferred in the cell in addition.

Polynucleotide import tissue or intracellular method comprises: directly be injected into polynucleotide in the in-vivo tissue; Or external by carrier (as virus, phage or plasmid etc.) earlier with the polynucleotide transfered cell in, again cell is transplanted in the body etc.

Suppress the oligonucleotide (comprising sense-rna and DNA) of the sub-12mRNA of human guanine interconversion factor and ribozyme also within the scope of the invention.Ribozyme is the enzyme sample RNA molecule that a kind of energy specificity is decomposed specific RNA, and its mechanism of action is to carry out the endonuclease effect after ribozyme molecule and the hybridization of complementary target RNA-specific.The RNA of antisense and DNA and ribozyme can obtain with existing any RNA or DNA synthetic technology, as the technology widespread use of solid phase phosphoamide chemical synthesis synthetic oligonucleotide.Antisense rna molecule can be transcribed acquisition by the dna sequence dna of this RNA that encodes in external or body.This dna sequence dna has been incorporated into the downstream of rna polymerase promoter of carrier.In order to increase the stability of nucleic acid molecule, available several different methods is modified it, and as increasing the sequence length of both sides, the connection between the ribonucleoside is used phosphoric acid thioester bond or peptide bond but not phosphodiester bond.

The polynucleotide of coding human guanine interconversion factor 12 can be used for the diagnosis with the relative disease of human guanine interconversion factor 12.The unconventionality expression of the expression that the polynucleotide of coding human guanine interconversion factor 12 can be used for detecting human guanine interconversion factor 12 human guanine interconversion factor 12 whether or under morbid state.As the dna sequence dna of human guanine interconversion factor 12 of encoding can be used for biopsy specimen is hybridized to judge the expression situation of human guanine interconversion factor 12.Hybridization technique comprises the Southern blotting, Northern blotting, in situ hybridization etc.These technological methods all are disclosed mature technologies, and relevant test kit all can obtain from commercial channels.Part or all of polynucleotide of the present invention can be used as probe stationary on microarray (Microarray) or DNA chip (being called " gene chip " again), is used for analyzing the differential expression analysis and the gene diagnosis of tissue gene.Carry out the transcription product that RNA-polymerase chain reaction (RT-PCR) amplification in vitro also can detect human guanine interconversion factor 12 with human guanine interconversion factor 12 special primers.

The sudden change that detects human guanine interconversion factor 12 genes also can be used for diagnosing the relevant disease of human guanine interconversion factor 12.The form of human guanine interconversion factor 12 sudden changes comprises that the point mutation compared with normal wild type human guanine interconversion factor 12 dna sequence dnas, transposition, disappearance, reorganization and other are any unusual etc.Available existing technology such as Southern blotting, dna sequence analysis, PCR and in situ hybridization detect sudden change.In addition, sudden change might influence proteic expression, therefore can judge indirectly that with Northern blotting, Western blotting gene has or not sudden change.

Sequence of the present invention identifies it also is valuable to karyomit(e).This sequence can be specifically at certain bar human chromosome particular location and and can with its hybridization.At present, need to identify the concrete site of each gene on the karyomit(e).Now, have only chromosomal marker thing seldom to can be used for the marker chromosomes position based on actual sequence data (repetition polymorphism).According to the present invention, for these sequences are associated with disease related gene, its important the first step is positioned these dna sequence dnas on the karyomit(e) exactly.

In brief, prepare PCR primer (preferred 15-35bp), sequence can be positioned on the karyomit(e) according to cDNA.Then, these primers are used for the somatocyte hybrid cell that the PCR screening contains each bar human chromosome.Have only those hybrid cells that contain corresponding to the people's gene of primer can produce the fragment of amplification.

The PCR localization method of somatocyte hybrid cell is that DNA is navigated to concrete chromosomal quick method.Use Oligonucleolide primers of the present invention,, can utilize one group to realize inferior location from specific chromosomal fragment or a large amount of genomic clone by similar approach.Other the similar strategy that can be used for chromosomal localization comprises in situ hybridization, uses the karyomit(e) prescreen and the hybridization preliminary election of the airflow classification of mark, thereby makes up the special cDNA storehouse of karyomit(e).

The cDNA clone is carried out fluorescence in situ hybridization (FISH) with Metaphase Chromosome, can in a step, accurately carry out chromosomal localization.The summary of this technology is referring to Verma etc., Human Chromosomes:a Manual ofBasic Techniques, Pergamon Press, New York (1988).

In case sequence is positioned to chromosome position accurately, the physical location of this sequence on karyomit(e) just can be associated with the gene map data.These data for example are found in, V.Mckusick, Mendelian Inheritance inMan (can by with the online acquisition of Johns Hopkins University Welch Medical library).Can pass through linkage analysis then, determine gene and navigated to relation between the disease on the chromosomal region already.

Then, need to measure ill and not cDNA between diseased individuals or genome sequence difference.If observe certain sudden change in some or all of diseased individuals, and this sudden change is not observed in any normal individual, then this sudden change may be the cause of disease of disease.More ill and diseased individuals not is usually directed at first seek the variation of structure in the karyomit(e), as from the horizontal visible of karyomit(e) or use based on detectable disappearance of the PCR of cDNA sequence or transposition.Resolving power according to present physical mapping and assignment of genes gene mapping technology, being accurately positioned to the cDNA of the chromosomal region relevant with disease, can be a kind of (the supposing that 1 megabasse mapping resolving power and every 20kb are corresponding to a gene) between 50 to 500 potential Disease-causing genes.

Polypeptide of the present invention, polynucleotide and stand-in thereof, agonist, antagonist and inhibitor and suitable pharmaceutical carrier combination back can be used.These carriers can be water, glucose, ethanol, salt, damping fluid, glycerine and their combination.Composition comprises the polypeptide or the antagonist of safe and effective amount and carrier and the vehicle that does not influence effect of drugs.These compositions can be used as medicine and are used for disease treatment.

The present invention also provides medicine box or the test kit that contains one or more containers, and one or more medicinal compositions compositions of the present invention are housed in the container.With these containers, can have by the given indicative prompting of government authorities of making, using or selling medicine or biological products, the government authorities that this prompting reflects production, uses or sells permits it to use on human body.In addition, polypeptide of the present invention can be used in combination with other treatment compound.

Pharmaceutical composition can be with mode administration easily, as by in part, intravenously, intraperitoneal, intramuscular, subcutaneous, the nose or the route of administration of intracutaneous.Human guanine interconversion factor 12 comes administration with the amount that treats and/or prevents concrete indication effectively.The amount and the dosage range that are applied to patient's human guanine interconversion factor 12 will depend on many factors, as administering mode, person's to be treated healthiness condition and diagnostician's judgement.

Description of drawings

Following accompanying drawing is used to illustrate specific embodiments of the present invention, and is not used in qualification by the scope of the invention that claims defined.

Fig. 1 is inventor's guanine interconversion factor 12 at 35-85 totally 51 amino acid and the segmental amino acid sequence homology comparison diagram of structural domain guanine interconversion factor subfunction.The top sequence is human guanine interconversion factor 12, and the below sequence is a structural domain guanine interconversion factor subfunction fragment.Same amino acid represents with monocase amino acid that between two sequences similar amino acid is represented with "+".

Fig. 2 is the polyacrylamide gel electrophoresis figure (SDS-PAGE) of isolating human guanine interconversion factor 12.12kDa is proteinic molecular weight.The arrow indication is isolated protein band.

Embodiment

Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, usually according to people such as normal condition such as Sambrook, molecular cloning: laboratory manual (New York:Cold Spring HarborLaboratory Press, 1989) condition described in, or the condition of advising according to manufacturer.

Embodiment 1: the clone of human guanine interconversion factor 12

Extract the total RNA of people's tire brain with guanidinium isothiocyanate/phenol/chloroform single stage method.From total RNA, separate poly (A) mRNA with Quik mRNA Isolation Kit (Qiegene company product).2ug poly (A) mRNA forms cDNA through reverse transcription.CDNA fragment orientation is inserted on the multiple clone site of pBSK (+) carrier (Clontech company product) with Smart cDNA clone's test kit (available from Clontech), transforms DH5 α, bacterium forms the cDNA library.Measure all clones' 5 ' and 3 ' terminal sequence with Dye terminate cycle reaction sequencing kit (Perkin-Elmer company product) and ABI 377 automatic sequencers (Perkin-Elmer company).CDNA sequence and the existing public dna sequence data storehouse (Genebank) measured are compared, found that the cDNA sequence of one of them clone 0039E12 is new DNA.By synthetic a series of primers the contained insertion cDNA fragment of this clone is carried out two-way mensuration.The result shows, the contained full-length cDNA of 0039E12 clone is 2384bp (as＜210〉1 shown in), from 738bp to 1064bp the open reading frame (ORF) of a 327bp arranged, the new protein of encoding (as＜210〉2 shown in).We are with this clone's called after pBS-0039E12, encoded protein matter called after human guanine interconversion factor 12.

Embodiment 2:cDNA clone's homology retrieval

With the sequence and the encoded protein sequence thereof of human guanine interconversion factor 12 of the present invention, with Blast program (Basiclocal Alignment search tool) [Altschul, SF et al.J.Mol.Biol.1990; 215:403-10], carry out domain analyses at databases such as prosite.Human guanine interconversion factor 12 of the present invention has homology at 35-85 and structural domain guanine interconversion factor subfunction fragment, and homology the results are shown in Fig. 1, and homology is 28%, must be divided into 14.51; Threshold value is 13.24.

Embodiment 3: with the gene of RT-PCR method clones coding human guanine interconversion factor 12

Total RNA is a template with fetus brain cell, is that primer carries out the synthetic cDNA of reverse transcription reaction with oligo-dT, with behind the test kit purifying of Qiagene, carries out pcr amplification with following primer:

Primer1：5’-GAATAGAAACTTCATTTAAAAAAAA-3’

Primer2：5’-TTTTCTGCTGTGCAGGTATTCATTT-3’

Primer1 for to be positioned at＜the forward sequence that begins of lbp of 210〉15 ' end;

Primer2 be＜210〉1 in 3 ' end reverse sequence.

The condition of amplified reaction: in the reaction volume of 50 μ l, contain 50mmol/L KCl, 10mmol/LTris-Cl, (pH8.5), 1.5mmol/L MgCl ₂, 200 μ mol/L dNTP, 10pmol primer, the Taq archaeal dna polymerase of 1U (Clontech company product).Go up by 25 cycles of following conditioned response at PE9600 type DNA thermal cycler (Perkin-Elmer company): 94 ℃ of 30sec; 55 ℃ of 30sec; 72 ℃ of 2min.When RT-PCR, establish the blank negative contrast of positive contrast of β-actin and template simultaneously.Amplified production is connected to (Invitrogen company product) on the pCR carrier with the test kit purifying of QIAGEN company with TA clone test kit.The dna sequence analysis result shows the dna sequence dna and＜210 of PCR product〉1-2384bp shown in 1 is identical.

The embodiment 4:Northern blotting analyst guanine interconversion factor 12 expression of gene:

Extract total RNA[Anal.Biochem 1987,162,156-159 with single stage method].This method comprises acid guanidine thiocyanate phenol-chloroform extracting.Promptly use 4M guanidinium isothiocyanate-25mM Trisodium Citrate, 0.2M sodium acetate (pH4.0) carries out homogenate to tissue, adds the phenol of 1 times of volume and the chloroform-primary isoamyl alcohol (49: 1) of 1/5 volume, and is centrifugal after mixing.The sucking-off aqueous phase layer adds Virahol (0.8 volume) and with the centrifugal RNA precipitation that obtains of mixture.With RNA precipitation 70% washing with alcohol that obtains, dry and soluble in water.With 20 μ g RNA, on 1.2% sepharose that contains 20mM 3-(N-morpholino) propanesulfonic acid (pH7.0)-5mM sodium acetate-1mM EDTA-2.2M formaldehyde, carry out electrophoresis.Be transferred on the nitrocellulose filter then.With α- ³²P dATP prepares by random priming ³²The dna probe of P-mark.Used dna probe is human guanine interconversion factor 12 coding region sequences (14bp to 970bp) of pcr amplification shown in Figure 1.Probe (about 2 * 10 with the 32P-mark ⁶Cpm/ml) spend the night in 42 ℃ of hybridization in a solution with the nitrocellulose filter that has shifted RNA, this solution comprises 50% methane amide-25mM KH ₂PO ₄(pH7.4)-5 * SSC-5 * Denhardt ' s solution and 200 μ g/ml salmon sperm DNAs.After the hybridization, filter membrane is washed 30min in 55 ℃ in 1 * SSC-0.1%SDS.Then, analyze with quantitative with Phosphor Imager.

Embodiment 5: vivoexpression, separation and the purifying of the recombinant human guanine interconversion factor 12

According to＜210〉1 and coding region sequence shown in Figure 1, design a pair of specificity amplification primer, sequence is as follows:

Primer3：5’-CCCGGATCCATGATGGAGGATGAAATCCACACCT-3’

Primer4：5’-CCCAAGCTTGTCACTGAGCAGACTTCCCGAGTCT-3’

5 ' end of these two sections primers contains NheI and BamHI restriction enzyme site respectively, be respectively the encoding sequence of target gene 5 ' end and 3 ' end thereafter, NheI and BamHI restriction enzyme site are corresponding to expression vector plasmid pET-28b (+) (Novagen company product, Cat.No.69865.3) the selectivity restriction enzyme site on.With the pBS-0039E12 plasmid that contains the total length goal gene is template, carries out the PCR reaction.The PCR reaction conditions is: contain pBS-0039E12 plasmid 10pg, primer Primer-3 and Primer-4 among the cumulative volume 50 μ l and be respectively 10pmol, Advantage polymerase Mix (Clontech company product) 1 μ l.Loop parameter: 94 ℃ of 20s, 60 ℃ of 30s, 68 ℃ of 2min, totally 25 circulations.Respectively amplified production and plasmid pET-28 (+) are carried out double digestion with NheI and BamHI, reclaim big fragment respectively, and connect with the T4 ligase enzyme.Connect product and transform, after the dull and stereotyped overnight incubation of the LB that contains kantlex (final concentration 30 μ g/ml), use the colony polymerase chain reaction (PCR) method screening positive clone, and check order with the big enterobacterial DH5 of Calcium Chloride Method α.Select the correct positive colony of sequence (pET-0039E12) with Calcium Chloride Method with recombinant plasmid transformed e. coli bl21 (DE3) plySs (Novagen company product).In the LB liquid nutrient medium that contains kantlex (final concentration 30 μ g/ml), host bacterium BL21 (pET-0039E12) is cultured to logarithmic phase at 37 ℃, adds IPTG to final concentration 1mmol/L, continues to cultivate 5 hours.Centrifugal collection thalline, through the broken bacterium of ultrasonic wave, centrifugal collection supernatant with carrying out chromatography with 6 Histidines (6His-Tag) bonded affinity column His.Bind Quick Cartridge (Novagen company product), has obtained target protein human guanine interconversion factor 12 of purifying.Through the SDS-PAGE electrophoresis, obtain a single band (Fig. 2) at the 12kDa place.This band is transferred on the pvdf membrane carries out the n terminal amino acid sequential analysis with the Edams hydrolysis method, 15 amino acid of N-end are identical with 15 amino-acid residues of N-end shown in＜210〉2 as a result.

Embodiment 6 anti-human guanine interconversion factor 12 production of antibodies

With synthetic following human guanine interconversion factor of Peptide synthesizer (PE company product) 12 specific polypeptide: NH ₂-Met-Met-Glu-Asp-Glu-Ile-His-Thr-Ser-Ser-Lys-Ala-Leu-Pro-Val-COOH

Form compoundly with hemocyanin and bovine serum albumin coupling this polypeptide respectively, method is referring to Avrameas, et al.Immunochemistry, 1969; 6:43.Add the complete Freund's adjuvant immunizing rabbit with the above-mentioned hemocyanin polypeptide complex of 4mg, add the incomplete Freund's adjuvant booster immunization once with the hemocyanin polypeptide complex again after 15 days.Employing is done the titre that ELISA measures antibody in the rabbit anteserum through the titer plate of 15 μ g/ml bovine serum albumin polypeptide complex bag quilts.From the rabbit anteserum of antibody positive, separate total IgG with albumin A-Sepharose.Polypeptide is incorporated on the Sepharose4B post of cyanogen bromide-activated, from total IgG, separates anti-peptide antibody with affinity chromatography.Immuno-precipitation proof antibody purified can combine with human guanine interconversion factor 12 specifically.

Sequence table

＜110〉Bode Gene Development Co., Ltd., Shanghai

The polynucleotide of＜a 120〉peptide species--human guanine interconversion factor 12 and this peptide species of coding

<130>0039E12

<160>2

<170>Patentln?version?3.1

<210>1

<211>2384

<212>DNA

<213>Homo?sapiens

<220>

<221>CDS

<222>(738)..(1064)

<223>

<400>1

gaatagaaac?ttcatttaaa?aaaaaaaatc?tctaattgta?agtctgcgct?aacacccgcg 60

tgtacaatct?gtcaaagtca?cacctggatt?tggggctgcc?tgaattaatt?aacaactttt 120

caatgtgtta?gtgctaacat?atggcattta?attactgcct?ccaaatctgt?aagtctctcc 180

actttgaatt?tcaaaattat?ttcttcatct?tcccgtgaat?cagaaagtga?ctggatggag 240

ccaccccatg?attcctattt?ttaatggagg?ctttgcaggt?ctgcaccctc?tgctgatgat 300

atttagttat?cttgactgct?gctagctctg?aacttgacac?ctggacactg?gaggttttgg 360

aggccttgag?agagacacac?acagcaggct?taagtgacat?ttctgggttc?taggcgttaa 420

agacccccag?caaattgtga?ggttggaggg?ttaaagcagg?atggatggat?ttacgctctg 480

tatatagagt?aaaaacaaca?agcaacttcc?cttgcggcaa?gaggcaaaga?catcagagtg 540

agcacagctc?cagcctctga?gaccagaccc?agaaccgaag?cagcttctgt?ttgtatcact 600

cactgccagc?ctaacttcag?caactgcttg?tgactttcag?tactgcacag?ctggtacctc 660

gttgggcaca?gcaatagagg?attaaaagct?ggatggcata?gaggatgaaa?gagggttaag 720

tatgtttctg?ctcgttt?atg?atg?gag?gat?gaa?atc?cac?acc?tcc?tca?aaa 770

Met?Met?Glu?Asp?Glu?Ile?His?Thr?Ser?Ser?Lys

1 5 10

gcc?ctg?cct?gtc?ccg?cca?ttt?gtc?ttt?ctg?caa?tgg?aaa?aat?aac?aaa 818

Ala?Leu?Pro?Val?Pro?Pro?Phe?Val?Phe?Leu?Gln?Trp?Lys?Asn?Asn?Lys

15 20 25

aaa?ggc?gga?ttc?tgt?tgg?aag?gtg?ggt?ggt?tta?ctc?agt?gtg?ctc?ctc 866

Lys?Gly?Gly?Phe?Cys?Trp?Lys?Val?Gly?Gly?Leu?Leu?Set?Val?Leu?Leu

30 35 40

tta?gca?gcc?cca?gca?gtt?ttt?gct?tct?cca?gag?tgg?gat?tat?ttt?cct 914

Leu?Ala?Ala?Pro?Ala?Val?Phe?Ala?Ser?Pro?Glu?Trp?Asp?Tyr?Phe?Pro

45 50 55

ttt?gga?caa?cct?ggc?tct?gtg?gga?gca?cgt?gga?tgg?aaa?aca?cga?tgc 962

Phe?Gly?Gln?Pro?Gly?Ser?Val?Gly?Ala?Arg?Gly?Trp?Lys?Thr?Arg?Cys

60 65 70 75

cgc?gag?ctt?cca?tcg?gtg?tgc?cag?agg?ctg?cag?ctt?aaa?tca?gag?cca 1010

Arg?Glu?Leu?Pro?Ser?Val?Cys?Gln?Arg?Leu?Gln?Leu?Lys?Ser?Glu?Pro

80 85 90

atg?gaa?agg?gca?ggt?tac?agg?aag?cca?tgg?aga?ctc?ggg?aag?tct?gct 1058

Met?Glu?Arg?Ala?Gly?Tyr?Arg?Lys?Pro?Trp?Arg?Leu?Gly?Lys?Ser?Ala

95 100 105

cag?tga?catcccaaag?tgcagggctg?atctgagcgc?aacctaacgt?ttcggggctc 1114

Gln

accccagagg?ttccctctct?cagaatcgct?cgatggacga?aagctgccaa?gggtgactgc 1174

ttttctggag?ttcacctgtc?catcatgaat?taatccatga?ttagcagctc?tttctggctc 1234

agcacataca?aagttttaga?aatctgaaca?cagtgataat?gaagacagta?actgtctaac 1294

tgtgatgagt?cctttgtgct?atccataaat?gtcagcaaac?tcaataaaag?tgcaattaga 1354

gctcgttata?cttctttcaa?aactacagga?gctatttaga?gcaactgagc?caaagaaatc 1414

tttgtgctct?ttgagctttt?gaaactatgc?ttacctgtca?aaaatgccat?gtgaaattag 1474

aaaaggcttg?tggcttttat?cactcgcttt?agaaaactac?atattcctcc?tgattcctcc 1534

atcaggtcca?aagagaacct?cgaagctgtt?catgtctgtg?caaggtgagg?ttccatttgg 1594

gcctctggaa?agaaaagcca?tttaaaagca?gccttccgct?catttatatt?tttggacttt 1654

tcttactgaa?aattcagaaa?atgaaggtca?atccgcaaag?caaaaggagc?actggcccaa 1714

ctagaagact?tgggggtttt?gatttgtaca?tacagagcta?tgcttcggta?taaacagccc 1774

aggcctggac?aggccggcct?ctgctgctca?gagtgcactg?aaaaggctgc?ctcggtgagt 1834

ggaataacag?tgttaactta?gcagaactta?gcacactgga?tacttgccac?gtgccgggta 1894

ttatgctgag?ctctttatag?acgttaactt?atgtaaacct?caaataacct?tgtaagacgg 1954

gcattacaac?aagtgttcag?atgacaccac?tgtagccccc?tctcacagct?gaagagacac 2014

tgatgctgag?taaggttaaa?taacttgccc?aaggcaaaac?caacaagcgt?ggagtcgggt 2074

caaatccagg?cttctccaaa?tagttcataa?ctgctacccc?aggctgctgc?ttgaaaaaca 2134

gcattttcag?gtaaccgtct?tatcctagaa?ataacggtgc?ccggtcctcc?ttggcttctg 2194

tgatcatgca?acattgggtg?tgcccatgac?agttttatta?tgtgctgtga?ttctagaccc 2254

aaagcaaatg?tgattctcag?ggaccacagt?ggacactgga?cagaaagaac?aacaaaacac 2314

tctgcaaact?cctggcagct?gcctgtagaa?agggttctct?gaggcaaatg?aatacctgca 2374

cagcagaaaa 2384

<210>2

<211>108

<212>PRT

<213>Homo?sapiens

<400>2

Met?Met?Glu?Asp?Glu?Ile?His?Thr?Ser?Ser?Lys?Ala?Leu?Pro?Val?Pro

1 5 10 15

Pro?Phe?Val?Phe?Leu?Gln?Trp?Lys?Asn?Asn?Lys?Lys?Gly?Gly?Phe?Cys

20 25 30

Trp?Lys?Val?Gly?Gly?Leu?Leu?Ser?Val?Leu?Leu?Leu?Ala?Ala?Pro?Ala

35 40 45

Val?Phe?Ala?Ser?Pro?Glu?Trp?Asp?Tyr?Phe?Pro?Phe?Gly?Gln?Pro?Gly

50 55 60

Ser?Val?Gly?Ala?Arg?Gly?Trp?Lys?Thr?Arg?Cys?Arg?Glu?Leu?Pro?Ser

65 70 75 80

Val?Cys?Gln?Arg?Leu?Gln?Leu?Lys?Ser?Glu?Pro?Met?Glu?Arg?Ala?Gly

85 90 95

Tyr?Arg?Lys?Pro?Trp?Arg?Leu?Gly?Lys?Ser?Ala?Gln

100 105

Claims (10)

1, a kind of isolated polypeptide-human guanine interconversion factor 12 is characterized in that it includes: the polypeptide of the aminoacid sequence shown in＜210〉2 or the active fragments of its polypeptide, analogue or derivative.

2, polypeptide as claimed in claim 1, the aminoacid sequence that it is characterized in that described polypeptide, analogue or derivative has the homogeny with the aminoacid sequence at least 95% shown in＜210〉2.

3, polypeptide as claimed in claim 2 is characterized in that it comprises and has＜polypeptide of the aminoacid sequence shown in 210〉2.

4, a kind of isolating polynucleotide, it is characterized in that described polynucleotide comprise be selected from down the group in a kind of:

(a) coding have＜210〉2 shown in the polynucleotide of the polypeptide of aminoacid sequence or its fragment, analogue, derivative;

(b) with polynucleotide (a) complementary polynucleotide; Or

(c) with (a) or the polynucleotide of at least 70% homogeny (b) are arranged.

5, polynucleotide as claimed in claim 4, it is characterized in that described polynucleotide comprise coding and have＜210〉2 shown in the polynucleotide of aminoacid sequence.

6, polynucleotide as claimed in claim 4, it is characterized in that the sequence of described polynucleotide includes＜210〉1 in the 738-1064 position sequence or＜210〉1 in the sequence of 1-2384 position.

7, a kind of recombinant vectors that contains exogenous polynucleotide is characterized in that it is the recombinant vectors that is formed by the described polynucleotide of arbitrary claim among the claim 4-6 and plasmid, virus or vehicle expression vector establishment.

8, a kind of genetically engineered host cell that contains exogenous polynucleotide is characterized in that it is to be selected from following a kind of host cell:

(a) host cell that transforms or transduce with the described recombinant vectors of claim 7; Or

(b) host cell that transforms or transduce with the described polynucleotide of the arbitrary claim among the claim 4-6.

9, a kind of preparation method with human guanine interconversion factor 12 active polypeptide is characterized in that described method comprises:

(a) under the expressing human guanine interconversion factor 12 conditions, cultivate the described through engineering approaches host cell of claim 8;

(b) from culture, isolate and have human guanine interconversion factor 12 active polypeptide.

10, a kind of can with polypeptide bonded antibody, it is characterized in that described antibody be can with human guanine interconversion factor 12 specificity bonded antibody.