WO2001094534A2 - A novel polypeptide, a human transcription factor 9.57 and the polynucleotide encoding the polypeptide - Google Patents

Abstract

The present invention discloses a novel polypeptide, a human transcription factor 9.57, the polynucleotide encoding the polypeptide and the method for producing the polypeptide by DNA recombinant technology. The invention also discloses the uses of the polypeptide in methods for treating various diseases, such as malignant tumor, hemopathy, developmental disorders, HIV infection, immunological disease, and various inflammations, etc. The invention also discloses the agonists against the polypeptide and the therapeutic action thereof. The invention also discloses the uses of the polynucleotide encoding the human transcription factor 9.57.

Description

 A new polypeptide-human transcription factor 9.57 and a polynucleotide encoding the polypeptide TECHNICAL FIELD

 The present invention belongs to the field of biotechnology. Specifically, the present invention describes a new polypeptide ~ Λ transcription factor 9.57, and a polynucleotide sequence encoding the polypeptide. The invention also relates to a method and application for preparing the polynucleotide and polypeptide. technical background

The enzyme CK2 is a ubiquitous serine / threonine kinase, which is found in various eukaryotic organisms. It participates in the phosphorylation of multiple protein substrates in the organism and has nearly a hundred different protein substrates. The catalytic activity of the enzyme is necessary in important physiological processes of many organisms, and the subunits of the enzyme are highly conserved among different species. The protein kinase CK2 discovered so far is usually composed of two subunits of α and β, such as α ₂ β ₂ type, α, ₂ ρ ₂ type or α α, P ₂ type. Where α and α 'are two isomers of the protein kinase CK2 catalytic subunit. Protein kinase CK2 mainly exists in the nucleus of proliferating cells. This enzyme regulates DNA replication and transcription in the nucleus.

 In 1999, Sweii et al. Cloned a BTF3 gene from humans. The protein encoded by this gene is involved in regulating the transcription initiation of RNA polymerase I I in vivo. There are two different isomers of this protein in the body-BTF3a and BTF3b, of which BTF3b is a non-transcriptionally active isomer, which works in synergy with the β-subunit of protein kinase CK2 in vivo to regulate RNA polymerase II transcription initiation. The N-terminus of BTF3b protein is 44 amino acid residues less than that of BTP3a and cannot activate the transcriptional activity of RNA polymerase. BTF3b can activate the transcription initiation activity of RNA polymerase II in vivo only by binding to the 'β subunit of protein kinase CK2 [Swen Grein, Walter Pyer in eta l., 1999, Molecular and Cel lular Bi ochemi s try, 191 : 121-128].

 From the above, BTF3 is an important transcriptional regulatory factor. There are two different isomers, BTF3a and BTF3b, both of which regulate the initiation of RM polymerase I I in vivo. Among them, BTF3b protein itself does not have transcriptional regulation activity, and it may be used as a substrate for protein kinase CK2, and cooperate with protein kinase CK2 to regulate the activity of RM polymerase. The mutation or abnormal expression of this protein will affect the transcriptional regulation activity of the corresponding RNA polymerase in the body, that is, affect the DNA replication and expression in vivo, and then affect the expression and action activity of related proteins in vivo. This protein is usually closely related to the occurrence of some related diseases of embryo metabolism and developmental disorders, immune system diseases, tumors of related tissues and cancer in vivo.

Gene chip analysis revealed that in the bladder mucosa, PMA + Ecv304 cell line, LPS + Ecv304 cell line thymus, normal fibroblasts OMNC Fibroblas t, growth factor stimulation, 1024NT, scar into fc growth factor stimulation, 1013HT, scar into fc without growth factor stimulation, 1013HC, bladder cancer construct cell EJ, bladder cancer , Bladder cancer, liver cancer, liver cancer cell line, fetal skin, spleen, prostate cancer, jejunum gland, cardia cancer, the expression profile of the polypeptide of the present invention is very similar to the expression profile of human transcription factor BTF3, so the functions of the two are also possible similar. 57。 The present invention is named human transcription factor 9.57.

 As mentioned above, the human transcription factor 9.57 protein plays an important role in regulating important functions of the body such as cell division and embryo development, and it is believed that a large number of proteins are involved in these regulatory processes, so there has been a need in the art to identify more involved in these processes The human transcription factor 9. 57 protein, especially the amino acid sequence of this protein is identified. New human transcription factor 9. 57 The isolation of the protein-coding gene also provides the basis for research to determine the role of the protein in health and disease states. This protein may form the basis for the development of diagnostic and / or therapeutic drugs for the disease, so it is important to isolate its coding DNA. Issued

 It is an object of the present invention to provide an isolated novel polypeptide-human transcription factor 9.57 and fragments, analogs and derivatives thereof.

 Another object of the invention is to provide a polynucleotide encoding the polypeptide.

 Another object of the present invention is to provide a recombinant vector containing a polynucleotide encoding a human transcription factor 9.57.

 Another object of the present invention is to provide a genetically engineered host cell containing a polynucleotide encoding a human transcription factor 9.57.

 Another object of the present invention is to provide a method for producing human transcription factor 9.57.

 Another object of the present invention is to provide an antibody against the polypeptide-human transcription factor 9.57 of the present invention.

 Another object of the present invention is to provide mimic compounds, antagonists, agonists, and inhibitors against the polypeptide of the present invention, a human transcription factor 9.57.

 Another object of the present invention is to provide a method for diagnosing and treating diseases associated with abnormalities in human transcription factor 9.57. Summary of invention

The present invention relates to an isolated polypeptide, which is of human origin and comprises: a polypeptide having the amino acid sequence of SEQ ID No. 2, or a conservative variant, biologically active fragment or derivative thereof. Preferably, the The polypeptide is a polypeptide having the amino acid sequence of SEQ ID NO: 2.

 The invention also relates to an isolated polynucleotide comprising a nucleotide sequence or a variant thereof selected from the group consisting of:

 (a) a polynucleotide encoding a polypeptide having the amino acid sequence of SEQ ID No. 2;

 (b) a polynucleotide complementary to polynucleotide (a);

 (c) A polynucleotide having at least 70% identity to a polynucleotide sequence of (a) or (b).

 More preferably, the sequence of the polynucleotide is one selected from the group consisting of: (a) a sequence having positions 308-571 in SEQ ID NO: 1; and (b) a sequence having positions 1-799 in SEQ ID NO: 1 Sequence of bits.

 The present invention further relates to a vector, particularly an expression vector, containing the polynucleotide of the present invention; a host cell genetically engineered with the vector, including a transformed, transduced or transfected host cell; Host cell and method of preparing the polypeptide of the present invention by recovering the expression product.

 The invention also relates to an antibody capable of specifically binding to a polypeptide of the invention.

 The invention also relates to a method for screening compounds that mimic, activate, antagonize or inhibit the activity of the human transcription factor 9.57 protein, which comprises utilizing a polypeptide of the invention. The invention also relates to compounds obtained by this method.

 The present invention also relates to a method for detecting a disease or disease susceptibility associated with abnormal expression of human transcription factor 9.57 protein in vitro, comprising detecting a mutation in the polypeptide or a polynucleotide sequence encoding the same in a biological sample, or detecting a biological The amount or biological activity of a polypeptide of the invention in a sample.

 The invention also relates to a pharmaceutical composition comprising a polypeptide of the invention or a mimetic thereof, an activator, an antagonist or an inhibitor, and a pharmaceutically acceptable carrier.

 The present invention also relates to the use of the polypeptide and / or polynucleotide of the present invention in the preparation of a medicament for treating cancer, developmental disease or immune disease or other diseases caused by abnormal expression of human transcription factor 9.57.

 Other aspects of the invention will be apparent to those skilled in the art from the disclosure of the techniques herein. BRIEF DESCRIPTION OF THE DRAWINGS

 The following drawings are used to illustrate specific embodiments of the present invention, but not to limit the scope of the present invention as defined by the claims.

FIG. 1 is a comparison diagram of gene chip expression profiles of human transcription factor 9.57 and human transcription factor BTF3 of the present invention. The upper graph is a graph of the expression profile of human transcription factor 9.57, and the lower graph is the graph of the expression profile of human transcription factor BTF3. Among them, 1-bladder mucosa, 2-PMA + Ecv304 cell line, 3-LPS + Ecv304 cell line thymus, 4-positive Normal fibroblasts 1024NC, 5-Fibroblas t, growth factor stimulation, 1024NT, 6-scar scar fc growth factor stimulation, 1013HT, 7-scar scar fc stimulation with no growth factor, 1013HC, 8-bladder cancer cell EJ, 9-bladder cancer, 10-bladder cancer, 11-liver cancer, 12-liver cancer cell line, 13-fetal skin, 14-spleen, 15-prostate cancer, 16-jejunum adenocarcinoma, 17 cardia cancer.

 Figure 2 shows the polyacrylamide gel electrophoresis (SDS-PAGE) of the isolated human transcription factor 9.57. 10kDa is the molecular weight of the protein. The arrow indicates the isolated protein band. Summary of the Invention

 The following terms used in this specification and claims have the following meanings unless specifically stated: "Nucleic acid sequence" refers to an oligonucleotide, a nucleotide or a polynucleotide and a fragment or part thereof, and may also refer to a genomic or synthetic DNA or RNA, they can be single-stranded or double-stranded, representing the sense or antisense strand. Similarly, the term "amino acid sequence" refers to an oligopeptide, peptide, polypeptide or protein sequence and fragments or portions thereof. When the "amino acid sequence" in the present invention relates to the amino acid sequence of a naturally occurring protein molecule, such "polypeptide" or "protein" does not mean to limit the amino acid sequence to a complete natural amino acid related to the protein molecule .

 A protein or polynucleotide "variant" refers to an amino acid sequence having one or more amino acids or nucleotide changes or a polynucleotide sequence encoding it. The changes may include deletions, insertions or substitutions of amino acids or nucleotides in the amino acid sequence or the nucleotide sequence. Variants can have "conservative" changes in which the substituted amino acid has a structural or chemical property similar to the original amino acid, such as the replacement of isoleucine with leucine. Variants can also have non-conservative changes, such as replacing glycine with tryptophan.

 "Deletion" refers to the deletion of one or more amino acids or nucleotides in an amino acid sequence or nucleotide sequence.

 "Insertion" or "addition" means that a change in the amino acid sequence or nucleotide sequence results in an increase in one or more amino acids or nucleotides compared to a molecule that exists in nature. "Replacement" refers to the replacement of one or more amino acids or nucleotides with different amino acids or nucleotides.

 "Biological activity" refers to a protein that has the structure, regulation, or biochemical function of a natural molecule. Similarly, the term "immunologically active" refers to the ability of natural, recombinant or synthetic proteins and fragments thereof to induce a specific immune response and to bind specific antibodies in a suitable animal or cell.

 An "agonist" is a molecule that, when combined with human transcription factor 9.57, causes a change in the protein to regulate the activity of the protein. An agonist may include a protein, a nucleic acid, a carbohydrate, or any other molecule that binds human transcription factor 9.57.

"Antagonist" or "inhibitor" refers to a type that can block or bind to human transcription factor 9.57. Molecules that regulate the biological or immunological activity of human transcription factor 9.57. Antagonists and inhibitors can include proteins, nucleic acids, carbohydrates or any other molecule that can bind to human transcription factor 9.57.

 "Regulation" refers to a change in the function of human transcription factor 9.57, including an increase or decrease in protein activity, a change in binding characteristics, and any other biological, functional, or immune change in human transcription factor 9.57.

 "Substantially pure" means substantially free of other proteins, lipids, sugars or other substances with which it is naturally associated. Those skilled in the art can purify human transcription factors 9.57 using standard protein purification techniques. Basically pure human transcription factor 9.57 produces a single main band on a non-reducing polyacrylamide gel. The purity of the human transcription factor 9.57 polypeptide can be analyzed by amino acid sequence.

 "Complementary" or "complementary" refers to the natural binding of polynucleotides by base-pairing under conditions of acceptable salt concentration and temperature. For example, the sequence "C-T-G-A" can be combined with the complementary sequence "G-A-C-T". The complementarity between two single-stranded molecules may be partial or complete. The degree of complementarity between nucleic acid strands has a significant effect on the efficiency and strength of hybridization between nucleic acid strands.

 "Homology" refers to the degree of complementarity and can be partially homologous or completely homologous. "Partial homology" refers to a partially complementary sequence that at least partially inhibits hybridization of a fully complementary sequence to a target nucleic acid. This inhibition of hybridization can be detected by performing hybridization (Southern imprinting or Northern blotting, etc.) under conditions of reduced stringency. Substantially homologous sequences or hybridization probes can compete and inhibit the binding of fully homologous sequences to the target sequence under conditions of reduced stringency. This does not mean that the conditions of reduced stringency allow non-specific binding, because the conditions of reduced stringency require that the two sequences bind to each other as a specific or selective interaction.

"Percent identity" refers to the percentage of sequences that are identical or similar in the comparison of two or more amino acid or nucleic acid sequences. The percent identity can be determined electronically, such as by the MEGALIGN program (Lasergene sof tware package, DNASTAR, Inc., Madi son Wis.). The MEGALIGN program can compare two or more sequences according to different methods such as the Clus ter method (Higgins, DG and PM Sharp (1988) Gene 73: 237-244). _{0 The} Cluster method divides each group of sequences by checking the distance between all pairs. Arranged in clusters. The clusters are then assigned in pairs or groups. The percent identity between two amino acid sequences such as sequence A and sequence B is calculated by the following formula:

 Number of residues matching between sequence ^

Residues sequences - sequences spacer residues - the sequence of residues ^X interval S

The percent identity between nucleic acid sequences can also be determined by the Clus ter method or by methods known in the art such as Jotun Hein (Hein L, (1990) Methods in enzymology 183: 625-645). ₀

"Similarity" refers to the identity of amino acid residues at corresponding positions when aligning amino acid sequences. Or the extent of conservative substitution. Amino acids used for conservative substitution, for example, negatively charged amino acids may include aspartic acid and glutamic acid; positively charged amino acids may include lysine and arginine; having an uncharged head group is Similar hydrophilic amino acids may include leucine, isoleucine and valine; glycine and alanine; asparagine and glutamine; serine and threonine; phenylalanine and tyrosine.

 "Antisense" refers to a nucleotide sequence that is complementary to a particular DNA or RNA sequence. "Antisense strand" refers to a nucleic acid strand that is complementary to a "sense strand."

 "Derivative" refers to HFP or a chemical modification of its nucleic acid. This chemical modification may be the replacement of a hydrogen atom with an alkyl, acyl or amino group. Nucleic acid derivatives can encode polypeptides that retain the main biological properties of natural molecules.

"Antibody" refers to a complete antibody molecule and its fragments, such as Fa,? (^ ') ₂ and? 7, which can specifically bind to the epitope of human transcription factor 9.57.

 A "humanized antibody" refers to an antibody in which the amino acid sequence of a non-antigen binding region is replaced to become more similar to a human antibody, but still retains the original binding activity.

 The term "isolated" refers to the removal of a substance from its original environment (for example, its natural environment if it is naturally occurring). For example, a naturally-occurring polynucleotide or polypeptide is not isolated when it is present in a living thing, but the same polynucleotide or polypeptide is separated from some or all of the substances that coexist with it in the natural system. Such a polynucleotide may be part of a certain vector, or such a polynucleotide or polypeptide may be part of a certain composition. Since the carrier or composition is not part of its natural environment, they are still isolated.

 As used herein, "isolated" refers to the separation of a substance from its original environment (if it is a natural substance, the original environment is the natural environment). For example, polynucleotides and polypeptides in a natural state in a living cell are not isolated and purified, but the same polynucleotides or polypeptides are separated and purified if they are separated from other substances in the natural state .

 As used herein, "isolated human transcription factor 9. 57" refers to human transcription factor 9. 57 that is substantially free of other proteins, lipids, carbohydrates, or other substances with which it is naturally associated. Those skilled in the art can purify human transcription factors 9.57 using standard protein purification techniques. Substantially pure polypeptides produce a single main band on a non-reducing polyacrylamide gel. Human transcription factor 9. 57 The purity of the polypeptide can be analyzed by amino acid sequence.

The present invention provides a new polypeptide, human transcription factor 9.57, which basically consists of the amino acid sequence shown in SEQ ID NO: 2. The polypeptide of the present invention may be a recombinant polypeptide, a natural polypeptide, a synthetic polypeptide, and preferably a recombinant polypeptide. The polypeptides of the present invention can be naturally purified products or chemically synthesized products, or can be obtained from prokaryotic or eukaryotic hosts (e.g., bacteria, yeast, higher plants, insects, and mammals) using recombinant techniques. Cells). Depending on the host used in the recombinant production protocol, the polypeptide of the invention may be glycosylated, or it may be non-glycosylated. Polypeptides of the invention may also include or exclude starting methionine residues.

 The invention also includes fragments, derivatives and analogs of human transcription factor 9.57. As used in the present invention, the terms "fragment", "derivative" and "analog" refer to a polypeptide that substantially retains the same biological function or activity of the human transcription factor 9.57 of the present invention. A fragment, derivative or analog of the polypeptide of the present invention may be: (I) a kind in which one or more amino acid residues are substituted with conservative or non-conservative amino acid residues (preferably conservative amino acid residues), and the substitution The amino acid may or may not be encoded by a genetic codon; or (Π) a type in which a group on one or more amino acid residues is replaced by another group to include a substituent; or (Π Ι) Such a polypeptide sequence in which the mature polypeptide is fused with another compound (such as a compound that prolongs the half-life of the polypeptide, such as polyethylene glycol); or (IV) a polypeptide sequence in which an additional amino acid sequence is fused into the mature polypeptide (Such as the leader or secretory sequence or the sequence used to purify the polypeptide or protease sequence). As explained herein, such fragments, derivatives, and analogs are considered to be within the knowledge of those skilled in the art.

 The present invention provides an isolated nucleic acid (polynucleotide), which basically consists of a polynucleotide encoding a polypeptide having the amino acid sequence of SEQ ID NO: 2. The polynucleotide sequence of the present invention includes the nucleotide sequence of SEQ ID NO: 1. The polynucleotide of the present invention is found from a cMA library of human fetal brain tissue. It contains a polynucleotide sequence that is 799 bases in length and its open reading frame 308-571 encodes 87 amino acids. According to the comparison of gene chip expression profiles, it was found that this polypeptide has a similar expression profile with human transcription factor BTF3, and it can be deduced that the human transcription factor 9.57 has similar functions to human transcription factor BTF3.

 The polynucleotide of the present invention may be in the form of DNA or RNA. DNA forms include cDNA, genomic DNA, or synthetic DNA. DNA can be single-stranded or double-stranded. DNA can be coding or non-coding. The coding region sequence encoding a mature polypeptide may be the same as the coding region sequence shown in SEQ ID NO: 1 or a degenerate variant. As used herein, a "degenerate variant" refers to a nucleic acid sequence encoding a protein or polypeptide having SEQ ID NO: 2 but different from the coding region sequence shown in SEQ ID NO: 1 in the present invention.

 The polynucleotide encoding the mature polypeptide of SEQ ID NO: 2 includes: only the coding sequence of the mature polypeptide; the coding sequence of the mature polypeptide and various additional coding sequences; the coding sequence of the mature polypeptide (and optional additional coding sequences); Coding sequence.

 The term "polynucleotide encoding a polypeptide" refers to a polynucleotide comprising the polypeptide and a polynucleotide comprising additional coding and / or non-coding sequences.

The invention also relates to variants of the polynucleotides described above, which encode polypeptides or fragments, analogs and derivatives of polypeptides having the same amino acid sequence as the invention. Variants of this polynucleotide can be days Naturally occurring allelic or non-naturally occurring variants. These nucleotide variants include substitution variants, deletion variants, and insertion variants. As known in the art, an allelic variant is an alternative form of a polynucleotide that may be a substitution, deletion, or insertion of one or more nucleotides, but does not substantially change the function of the polypeptide it encodes .

 The invention also relates to a polynucleotide that hybridizes to the sequence described above (there is at least 50%, preferably 70% identity between the two sequences). The present invention particularly relates to polynucleotides that can hybridize to the polynucleotides of the present invention under stringent conditions. In the present invention, "strict conditions" means: '(1) hybridization and elution at lower ionic strength and higher temperature, such as 0.2xSSC, 0.1% SDS, 6 (TC; or (2 ) Add a denaturant during hybridization, such as 50% (v / v) formamide, 0.1% calf serum / 0.1% Ficol l, 42 ° C, etc .; or (3) only between two sequences Hybridization occurs only when the identity is at least 95%, and more preferably 97%. Moreover, the polypeptide encoded by the hybridizable polynucleotide has the same biological function and activity as the mature polypeptide shown in SEQ ID NO: 2 .

 The invention also relates to nucleic acid fragments that hybridize to the sequences described above. As used in the present invention, a "nucleic acid fragment" contains at least 10 nucleotides in length, preferably at least 20-30 nucleotides, more preferably at least 50-60 nucleotides, and most preferably at least 100 nuclei. Glycylic acid or more. Nucleic acid fragments can also be used in nucleic acid amplification techniques, such as PCR, to identify and / or isolate polynucleotides encoding human transcription factor 9.57.

 The polypeptides and polynucleotides in the present invention are preferably provided in an isolated form and are more preferably purified to homogeneity. The specific polynucleotide sequence encoding the human transcription factor 9.57 of the present invention can be obtained by various methods. For example, polynucleotides are isolated using hybridization techniques well known in the art. These techniques include, but are not limited to: 1) hybridization of probes to genomic or CDM libraries to detect homologous polynucleotide sequences, and 2) antibody screening of expression libraries to detect multinucleated clones with common scab characteristics Nucleotide fragments.

 The DNA fragment sequence of the present invention can also be obtained by the following methods: 1) isolating the double-stranded DM sequence from the genomic DNA; 2) chemically synthesizing the D-sequence to obtain the double-stranded MA of the polypeptide.

 Of the methods mentioned above, genomic DNA isolation is the least commonly used. Direct chemical synthesis of DNA sequences is often the method of choice. The more commonly used method is the isolation of cDNA sequences. The standard method for isolating the cDNA of interest is to isolate the mR from donor cells and perform reverse transcription to form a plasmid or phage cDNA library. Various methods have been used to extract mRNA, and kits are also commercially available (Qiagene). And the construction of cDNA libraries is also a common method (Sambrook, et al., Molecular Cloning, A Laboratory Manual, Cold Spiring Harbor Laboratory. New York, 1989). Commercially available cDNA libraries are also available, such as different cDNA libraries from Clontech. When polymerase reaction technology is used in combination, even very small expression products can be cloned.

These genes can be screened from these cDNA libraries by conventional methods. These methods include (but not Limited to): (l) DNA-DM or DNA-RNA hybridization; (2) the presence or loss of marker gene function; ( ³ ) determination of the level of transcript of human transcription factor 9.57; (4) through immunological techniques or The biological activity is measured to detect the protein product expressed by the gene. The above methods can be used singly or in combination.

 In the method (1), the probe used for hybridization is homologous to any part of the polynucleotide of the present invention, and its length is at least 10 nucleotides, preferably at least 30 nucleotides, more preferably At least 50 nucleotides, preferably at least 100 nucleotides. In addition, the length of the probe is usually within 2000 nucleotides, preferably within 1000 nucleotides. The probe used herein is usually a D sequence chemically synthesized based on the gene sequence information of the present invention. The genes or fragments of the present invention can of course be used as probes. DNA probes can be labeled with radioisotopes, luciferin, or enzymes (such as alkaline phosphatase).

 In the (4) method, the protein product of the 9.57 gene expression of human transcription factor can be detected by immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELISA).

 A method (Sa iki, et al. Science 1985; 230: 1350-1354) using PCR technology to amplify DNA / RNA is preferred for obtaining the gene of the present invention. Especially when it is difficult to obtain the full-length cDNA from the text, the RACE method (MCE-Rapid Amplification of cDNA Ends) can be preferably used. The primers for PCR can be based on the polynucleotide sequence information of the present invention disclosed herein It is appropriately selected and synthesized by a conventional method. The amplified MA / RM fragments can be isolated and purified by conventional methods such as by gel electrophoresis.

 The polynucleotide sequence of the gene of the present invention or various DNA fragments and the like obtained as described above can be measured by a conventional method such as dideoxy chain termination method (Sanger et al. PNAS, 1977, 74: 5463-5467). Such polynucleotide sequences can also be determined using commercial sequencing kits and the like. In order to obtain the full-length cDNA sequence, sequencing needs to be repeated. Sometimes it is necessary to determine the cDNA sequence of multiple clones in order to splice into a full-length cDNA sequence.

 The present invention also relates to a vector comprising a polynucleotide of the present invention, and a host cell genetically engineered using the vector of the present invention or directly using a human transcription factor 9.57 coding sequence, and a method for producing a polypeptide of the present invention by recombinant technology. .

In the present invention, a polynucleotide sequence encoding human transcription factor 9.57 can be inserted into a vector to constitute a recombinant vector containing the polynucleotide of the present invention. The term "vector" refers to bacterial plasmids, phages, yeast plasmids, plant cell viruses, mammalian cell viruses such as adenoviruses, retroviruses, or other vectors well known in the art. Vectors suitable for use in the present invention include, but are not limited to: T7 promoter-based expression vectors (Rosenberg, et al. Gene, 1987, 56: 125) expressed in bacteria; pMSXND expression vectors expressed in mammalian cells (Lee and Na thans, J Bio Chera. 263: 3521, 1988) and baculovirus-derived vectors expressed in miracidial cells. In short, as long as it can be replicated and stabilized in a host, any plasmid and vector can be used to construct a recombinant expression vector. An important expression vector It is characterized by containing replication origins, promoters, marker genes and translational regulatory elements.

 Methods known to those skilled in the art can be used to construct expression vectors containing a DNA sequence encoding human transcription factor 9.57 and appropriate transcriptional / translational regulatory elements. These methods include in vitro recombinant DNA technology, DNA synthesis technology, and in vivo recombination technology (Sambroook, et al. Molecular Cloning, a Laboratory Manual, Cold Spring Harbor Laboratory. New York, 1989). The D sequence can be operably linked to an appropriate promoter in an expression vector to guide mR synthesis. Representative examples of these promoters are: the lac or trp promoter of E. coli; the PL promoter of lambda phage; eukaryotic promoters include the CMV immediate early promoter, the HSV thymidine kinase promoter, the early and late SV40 promoters, Retroviral LTRs and other known promoters that control the expression of genes in prokaryotic or eukaryotic cells or their viruses. The expression vector also includes a ribosome binding site for translation initiation, a transcription terminator, and the like. Insertion of enhancer sequences into the vector will enhance its transcription in higher eukaryotic cells. Enhancers are cis-acting factors for DNA expression, usually about 10 to 300 base pairs, which act on promoters to enhance gene transcription. Examples include SV40 enhancers of 100 to 270 base pairs on the late side of the origin of replication, polyoma enhancers and adenovirus enhancers on the late side of the origin of replication.

 In addition, the expression vector preferably contains one or more selectable marker genes to provide phenotypic traits for selection of transformed host cells, such as dihydrofolate reductase, neomycin resistance, and green for eukaryotic cell culture. Fluorescent protein (GFP), or tetracycline or ampicillin resistance for E. coli.

 Those of ordinary skill in the art will know how to select appropriate vector / transcription control elements (such as promoters, enhancers, etc.) and selectable marker genes.

 In the present invention, a polynucleotide encoding human transcription factor 9.57 or a recombinant vector containing the polynucleotide can be transformed or transduced into a host cell to constitute a genetically engineered host cell containing the polynucleotide or the recombinant vector. The term "host cell" refers to a prokaryotic cell, such as a bacterial cell; or a lower eukaryotic cell, such as a yeast cell; or a higher eukaryotic cell, such as a mammalian cell. Representative examples are: E. coli, Streptomyces; bacterial cells such as Salmonella typhimurium; fungal cells such as yeast; plant cells; insect cells such as Fly S2 or Sf9; animal cells such as CH0, COS or Bowes melanoma cells.

Transformation of a host cell with a DNA sequence described in the present invention or a recombinant vector containing the DNA sequence can be performed using conventional techniques well known to those skilled in the art. When the host is a prokaryote such as E. coli, competent cells capable of DNA uptake can be harvested after exponential growth phase, with (: Treatment 1 _2, steps well known in the art used alternative is to use MgCl _2.. If necessary, transformation can also be performed by electroporation. When the host is a eukaryotic organism, the following DM transfection methods can be used: calcium phosphate co-precipitation method, or conventional mechanical methods such as microinjection, electroporation, and liposomes Packaging, etc. Using conventional recombinant DM technology, the polynucleotide sequence of the present invention can be used to express or produce recombinant human transcription factor 9.57 (Science, 1984; 224: 1431). Generally there are the following steps:

 (1) using the polynucleotide (or variant) encoding human human transcription factor 9.57 of the present invention, or transforming or transducing a suitable host cell with a recombinant expression vector containing the polynucleotide;

 (2) culturing host cells in a suitable medium;

 (3) Isolate and purify protein from culture medium or cells.

 In step (2), depending on the host cell used, the medium used in the culture may be selected from various conventional mediums. Culture is performed under conditions suitable for host cell growth. After the host cells have grown to an appropriate cell density, the selected promoter is induced by a suitable method (such as temperature conversion or chemical induction), and the cells are cultured for a period of time.

 In step (3), the recombinant polypeptide may be coated in a cell, expressed on a cell membrane, or secreted outside the cell. If necessary, the recombinant protein can be isolated and purified by various separation methods using its physical, chemical and other properties. These methods are well known to those skilled in the art. These methods include, but are not limited to: conventional renaturation treatment, protein precipitant treatment (salting out method), centrifugation, osmotic disruption, ultrasonic treatment, ultracentrifugation, molecular sieve chromatography (gel filtration), adsorption chromatography, ion Exchange chromatography, high performance liquid chromatography (HPLC) and various other liquid chromatography techniques and combinations of these methods.

 The polypeptides of the present invention, as well as antagonists, agonists and inhibitors of the polypeptides, can be directly used in the treatment of diseases, for example, they can treat malignant tumors, adrenal deficiency, skin diseases, various types of inflammation, HIV infection, and immune diseases.

 Protein kinase CK2 is a ubiquitous serine / threonine kinase, which is involved in the phosphorylation of multiple protein substrates in eukaryotes, with nearly a hundred different protein substrates. Protein kinase CK2 mainly exists in the nucleus of proliferating cells, and this enzyme regulates the replication and transcription of DM in the nucleus.

 The protein encoded by the human BTF3 gene is involved in regulating the initiation of MA polymerase I I in vivo. Its isomer BTF3b is a non-transcriptionally active isomer, which interacts with the P subunit of the protein kinase CK2 in vivo to regulate the transcription initiation of MA polymerase II.

 The expression profile of the polypeptide of the present invention is consistent with the expression profile of the human BTF3 gene protein, and both have similar biological functions. The polypeptide of the present invention can be used as a substrate of the protein kinase CK2 protein in vivo, and regulates the transcription initiation of RNA polymerase I I, which is important for protein translation. Its abnormal expression is usually closely related to the occurrence of some related disorders of material metabolism disorders, diseases of protein metabolism disorders, and tumors and cancers of related tissues, and produce related diseases.

It can be seen that the abnormal expression of the human transcription factor 9.57 of the present invention will produce various diseases, especially various tumors, embryonic development disorders, growth disorders, inflammation, and immune diseases. Illnesses include, but are not limited to:

 Tumors of various tissues: stomach cancer, liver cancer, lung cancer, esophageal cancer, breast cancer, leukemia, lymphoma, thyroid tumor, uterine fibroids, neuroblastoma, astrocytoma, ependymoma, glioblastoma, nerve Fibroma, colon cancer, melanoma, bladder cancer, uterine cancer, endometrial cancer, thymic tumor, nasopharyngeal cancer, laryngeal cancer, tracheal tumor, fibroid, fibrosarcoma, lipoma, liposarcoma

 Fetal developmental disorders: congenital abortion, cleft palate, limb loss, limb differentiation disorder, atrial septal defect, neural tube defect, congenital hydrocephalus, congenital glaucoma or cataract, congenital deafness

 Growth and development disorders: mental retardation, brain development disorders, skin, fat and muscular dysplasia, bone and joint dysplasia, various metabolic deficiencies, stunting, dwarfism, Cushing syndrome, Sexual retardation

 Inflammation: chronic active hepatitis, sarcoidosis, polymyositis, chronic rhinitis, chronic gastritis, cerebrospinal multiple sclerosis, glomerulonephritis, myocarditis, cardiomyopathy, atherosclerosis, gastric ulcer, cervicitis Various infectious inflammations

 Immune diseases: Systemic lupus erythematosus, rheumatoid arthritis, bronchial asthma, urticaria, specific dermatitis, post-infection myocarditis, scleroderma, myasthenia gravis, Guillain-Barre syndrome, common variable immunodeficiency disease , Primary B-lymphocyte immunodeficiency disease, Acquired immunodeficiency syndrome

 The abnormal expression of the human transcription factor 9.57 of the present invention will also produce certain hereditary, hematological diseases and the like.

 The polypeptide of the present invention and the antagonists, agonists and inhibitors of the polypeptide can be directly used in the treatment of diseases, for example, it can treat various diseases, especially various tumors, embryonic development disorders, growth and development disorders, inflammation, and immunity. Sexual diseases, certain hereditary, blood diseases, etc.

 The invention also provides methods for screening compounds to identify agents that increase (agonist) or suppress (antagonist) the human transcription factor 9.57. Agonists increase human transcription factors 9.57 to stimulate biological functions such as cell proliferation, while antagonists prevent and treat disorders related to excessive cell proliferation, such as various cancers. For example, mammalian cells or membrane preparations expressing human transcription factor 9.57 can be cultured with labeled human transcription factor 9.57 in the presence of drugs. The ability of the drug to increase or block this interaction is then determined.

 Antagonists of human transcription factor 9.57 include antibodies, compounds, receptor deletions, and analogs that have been screened. Antagonists of human transcription factor 9.57 can bind to human transcription factor 9.57 and eliminate its function, or inhibit the production of the polypeptide, or bind to the active site of the polypeptide so that the polypeptide cannot perform biological functions.

When screening compounds that act as antagonists, human transcription factor 9.57 can be added to bioanalytical assays to determine the effect of compounds on the interaction between human transcription factor 9.57 and its receptor Determine whether the compound is an antagonist. Receptor deletions and analogs that act as antagonists can be screened in the same manner as described above for screening compounds. Polypeptide molecules capable of binding to human transcription factor 9.57 can be obtained by screening a random peptide library composed of various possible combinations of amino acids bound to a solid phase. When screening, the human transcription factor 9.57 molecule should generally be labeled.

 The present invention provides a method for producing antibodies using polypeptides, and fragments, derivatives, analogs or cells thereof as antigens. These antibodies can be polyclonal or monoclonal antibodies. The invention also provides antibodies directed against a human transcription factor 9.57 epitope. These antibodies include (but are not limited to): Doklon antibodies, monoclonal antibodies, chimeric antibodies, single-chain antibodies, Fab fragments, and fragments from Fab expression libraries. .

 The production of polyclonal antibodies can be obtained by direct injection of human transcription factor 9.57 into immunized animals (such as rabbits, mice, rats, etc.). A variety of adjuvants can be used to enhance the immune response, including but not limited to Freund's adjuvant. Techniques for preparing monoclonal antibodies against human transcription factor 9.57 include, but are not limited to, hybridoma technology (ohler and Milstein. Nature, 1975, 256: 495-497), triple tumor technology, human beta-cell hybridoma technology, EBV-hybridoma Technology, etc. Chimeric antibodies that combine human constant regions and non-human-derived variable regions can be produced using existing techniques (Morrison et al, PMS, 1985, 81: 6851). The existing technology for producing single chain antibodies (U.S. Pat No. 4946778) can also be used to produce single chain antibodies against human transcription factor 9.57.

 Anti-human transcription factor 9.57 antibodies can be used in immunohistochemistry to detect human transcription factor 9.57 in biopsy specimens.

 Monoclonal antibodies that bind to human transcription factor 9.57 can also be labeled with radioisotopes and injected into the body to track their location and distribution. This radiolabeled antibody can be used as a non-invasive diagnostic method to locate tumor cells and determine whether there is metastasis. '

 Antibodies can also be used to design immunotoxins against a specific bead site in the body. For example, human transcription factor 9.57 high affinity monoclonal antibodies can covalently bind to bacterial or plant toxins (such as diphtheria toxin, ricin, ormosine, etc.). A common method is to attack the amino group of an antibody with a thiol cross-linking agent such as SPDP and bind the toxin to the antibody by disulfide exchange. This hybrid antibody can be used to kill human transcription factor 9.57 positive cells.

 The antibodies of the present invention can be used to treat or prevent diseases related to human transcription factor 9.57. Administration of an appropriate dose of antibody can stimulate or block the production or activity of human transcription factor 9.57.

The invention also relates to a diagnostic test method for quantitatively and locally detecting the level of human transcription factor 9.57. These tests are well known in the art and include FISH assays and radioimmunoassays. The level of human transcription factor 9.57 detected in the test can be used to explain the importance of human transcription factor 9.57 in various diseases Sexual and diagnostic diseases for which human transcription factor 9.57 works.

 The polypeptide of the present invention can also be used for peptide mapping analysis. For example, the polypeptide can be specifically cleaved by physical, chemical or enzymatic analysis, and subjected to one-dimensional or two-dimensional or three-dimensional gel electrophoresis analysis, and more preferably mass spectrometry analysis.

 The polynucleotide encoding human transcription factor 9.57 can also be used for a variety of therapeutic purposes. Gene therapy technology can be used to treat abnormal cell proliferation, development or metabolism caused by the non-expression or abnormal / inactive expression of human transcription factor 9.57. Recombinant gene therapy vectors (such as viral vectors) can be designed to express mutated human transcription factor 9.57 to inhibit endogenous human transcription factor 9.57 activity. For example, a mutated human transcription factor 9.57 may be a shortened human transcription factor 9.57 that lacks a signaling domain. Although it can bind to downstream substrates, it lacks signaling activity. Therefore, the recombinant gene therapy vector can be used to treat diseases caused by abnormal expression or activity of human transcription factor 9.57. Expression vectors derived from viruses such as retrovirus, adenovirus, adenovirus-associated virus, herpes simplex virus, parvovirus, etc. can be used to transfer the polynucleotide encoding human transcription factor 9.57 into cells. A method for constructing a recombinant viral vector carrying a polynucleotide encoding a human transcription factor 9.57 can be found in the existing literature (Sambrook, et al.). Alternatively, a recombinant polynucleotide encoding human transcription factor 9. 57 can be packaged into liposomes and transferred into cells.

 Methods for introducing a polynucleotide into a tissue or cell include: directly injecting the polynucleotide into a tissue in vivo; or introducing the polynucleotide into a cell in vitro through a vector (such as a virus, phage, or plasmid), and then transplanting the cell Into the body and so on.

 Oligonucleotides (including antisense RM and DNA) and ribozymes that inhibit human transcription factor 9.57 mRNA are also within the scope of the present invention. A ribozyme is an enzyme-like RNA molecule that can specifically decompose a specific RM. Its mechanism of action is that the ribozyme molecule specifically hybridizes with a complementary target RNA for endonucleation. Antisense RNA, DNA, and ribozymes can be obtained using any existing or synthetic techniques, such as solid-phase phosphate amide chemical synthesis to synthesize oligonucleotides. Antisense RNA molecules can be obtained by in vitro or in vivo transcription of the D sequence encoding the RNA. This DNA sequence has been integrated downstream of the RNA polymerase promoter of the vector. In order to increase the stability of the nucleic acid molecule, it can be modified in a variety of ways, such as increasing the sequence length on both sides, and the linkage between ribonucleosides using phosphorothioate or peptide bonds instead of phosphodiester bonds.

The polynucleotide encoding human transcription factor 9.57 can be used for the diagnosis of diseases related to human transcription factor 9.57. The polynucleotide encoding human transcription factor 9.57 can be used to detect the expression of human transcription factor 9.57 or the abnormal expression of human transcription factor 9.57 in a disease state. For example, a DNA sequence encoding human transcription factor 9.57 can be used to hybridize biopsy specimens to determine the expression of human transcription factor 9.57. Hybridization Techniques include Southern blotting, Northern blotting, and in situ hybridization. These techniques and methods are publicly available and mature, and related kits are commercially available. A part or all of the polynucleotide of the present invention can be used as a probe to be fixed on a microarray or a DNA chip (also referred to as a "gene chip") for analyzing differential expression analysis and gene diagnosis of genes in a tissue. Human transcription factor 9.57 specific primers for RNA-polymerase chain reaction (RT-PCR) in vitro amplification can also detect the transcription product of human transcription factor 9.57.

 Detection of mutations in the human transcription factor 9.57 gene can also be used to diagnose human transcription factor 9.57-related diseases. Human transcription factor 9.57 mutations include point mutations, translocations, deletions, recombinations, and any other abnormalities compared to normal wild-type human transcription factor 9.57 DNA sequences. Mutations can be detected using existing techniques such as Southern blotting, DNA sequence analysis, PCR and in situ hybridization. In addition, mutations may affect protein expression, so Northern blotting and Western blotting can be used to indirectly determine whether a gene is mutated.

 The sequences of the invention are also valuable for chromosome identification. This sequence will specifically target a specific position on a human chromosome and can hybridize to it. Currently, specific sites for each gene on the chromosome need to be identified. Currently, only a few chromosome markers based on actual sequence data (repeating polymorphisms) are available for marking chromosome positions. According to the present invention, in order to associate these sequences with disease-related genes, an important first step is to locate these DM sequences on a chromosome.

 In short, a PCR primer (preferably 15-35bp) is prepared from the cDNA, and the sequence can be located on the chromosome. These primers were then used for PCR screening of somatic hybrid cells containing individual human chromosomes. Only those hybrid cells that have a human gene corresponding to the primer will produce amplified fragments.

 PCR localization of somatic hybrid cells is a quick way to localize DNA to specific chromosomes. Using the oligonucleotide primers of the present invention, in a similar manner, a set of fragments from a specific chromosome or a large number of genomic clones can be used to achieve sublocalization. Other similar strategies that can be used for chromosomal localization include in situ hybridization, chromosome pre-screening with labeled flow sorting, and hybrid pre-selection to construct chromosome-specific cDM libraries.

 Fluorescent in situ hybridization (FISH) of cDNA clones with metaphase chromosomes allows precise chromosomal localization in one step. For a review of this technique, see Verma et al., Human Chromosomes: a Manual of Basic Techniques, Pergamon Pres s, New York (1988).

Once the sequence is located at the exact chromosomal location, the physical location of the sequence on the chromosome can be correlated with the genetic map data. These data can be found in V. Mckusick, Mendelian ian Inherance in Man (available online with Johns Hopkins University Wetch Medical Library). Linkage analysis can then be used to determine the relationship between genes and diseases that have been mapped to chromosomal regions. Next, the CDM or genomic sequence differences between the affected and unaffected individuals need to be determined. If a mutation is observed in some or all diseased individuals and the mutation is not observed in any normal individuals, the mutation may be the cause of the disease. Comparing affected and unaffected individuals usually involves first looking for structural changes in the chromosome, such as deletions or translocations that are visible at the chromosomal level or detectable using cDNA sequence-based PCR. According to the resolution capabilities of current physical mapping and gene mapping technology, the cDNA accurately mapped to the chromosomal region associated with the disease can be one of 50 to 500 potentially pathogenic genes (assuming 1 megabase mapping resolution) Capacity and each 20kb corresponds to a gene).

 The polypeptides, polynucleotides and mimetics, agonists, antagonists and inhibitors of the present invention can be used in combination with a suitable pharmaceutical carrier. These carriers can be water, glucose, ethanol, salts, buffers, glycerol, and combinations thereof. The composition comprises a safe and effective amount of the polypeptide or antagonist, and carriers and excipients which do not affect the effect of the drug. These compositions can be used as drugs for the treatment of diseases.

 The invention also provides a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the invention. Along with these containers, there may be instructional instructions given by government agencies that manufacture, use, or sell pharmaceuticals or biological products, which prompts permission for administration on the human body by government agencies that produce, use, or sell. In addition, the polypeptides of the invention can be used in combination with other therapeutic compounds.

 The pharmaceutical composition can be administered in a convenient manner, such as by a topical, intravenous, intraperitoneal, intramuscular, subcutaneous, intranasal or intradermal route of administration. Human transcription factor 9. 57 is administered in an amount effective to treat and / or prevent a specific indication. The amount and range of human transcription factor 9.57 administered to a patient will depend on many factors, such as the mode of administration, the health conditions of the person to be treated, and the judgment of the diagnostician. Examples

 The present invention is further described below with reference to specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. The experimental methods in the following examples are not marked with specific conditions, usually according to conventional conditions, such as Sambrook et al., Molecular Cloning: Laboratory Manual (New York: Cold Harbor Harbor Laboratory Pres s, 1989), or according to the conditions described in Conditions recommended by the manufacturer.

 Example 1 Cloning of human transcription factor 9.57

Total human fetal brain RNA was extracted by one-step method with guanidine isothiocyanate / phenol / chloroform. Poly (A) mRNA was isolated from total RNA using Quik mRNA Isolat ion Kit (product of Qiegene). 2ug poly (A) mRM forms cDNA by reverse transcription. Smart cDNA cloning kit (purchased from Clontech) was used to insert the cDNA fragments into the multiple cloning site of pBSK (+) vector (Clontech) to transform DH5a. The bacteria formed a cDNA library. With Dye The terminate cycle react ion sequencing kit (Perkin-Elmer) and ABI 377 automatic sequencer (Perkin-Elmer) determined the sequences at the 5 'and 3' ends of all clones. Comparing the determined CDM sequence with the existing public DNA sequence database (Genebank), it was found that the cDNA sequence of one of the clones 0545F05 was new DNA. A series of primers were synthesized to determine the inserted cDNA fragments of the clone in both directions. The results showed that the full-length cDNA contained in the 0545F05 clone was 799 bp (as shown in Seq ID NO: l), and there was a 263 bp open reading frame (0RF) from 308 bp to 571 bp, encoding a new protein (such as Seq ID NO : Shown in 2). 57. We named this clone pBS- 0545F05 and the encoded protein was named human transcription factor 9.57. Example 2 Cloning of a gene encoding human transcription factor 9.57 by RT-PCR

 CDM was synthesized using fetal brain cell total RNA as a template and ol igo-dT as a primer for reverse transcription reaction. After purification with Qiagene's kit, PCR was performed with the following primers:

 Pr imerl: 5'- GATGTTAACGGTAGATTTTTCATA -3 '(SEQ ID NO: 3)

 Pr imer2: 5'- GAAAAATCAATAAAATTTGGTTTA -3 '(SEQ ID NO: 4)

 Primerl is a forward sequence starting at lbp at the 5 ′ end of SEQ ID NO: 1;

 Primer2 is the 3 'end reverse sequence in SEQ ID NO: 1.

Conditions for the amplification reaction: 50 μl of reaction volume in 50 μl containing 50 ol / L KCl, 10fflmol / L Tri s-HCl pH 8. 5, 1. 5mmol / L MgCl ₂ , 20 (^ mol / L dNTP, lOpmol primer, 1U of Taq DNA polymerase (product of Clontech). The reaction was performed on a PE9600 DNA thermal cycler (Perkin-Elmer) for 25 cycles under the following conditions: 94.C 30sec; 55.C 30sec; 72 ° C 2min. During RT-PCR, β-act in was used as a positive control and template blank was used as a negative control. The amplified product was purified using a QIAGEN kit and ligated to a pCR vector (invitrogen) using a TA cloning kit. DNA sequence The analysis results showed that the DNA sequence of the PCR product was completely identical to the 1-799bp shown in SEQ ID NO: 1. Example 3 Northern blot analysis of human transcription factor 9.57 gene expression

Total RNA extraction in one step [Anal. Biochem 1987, 162, 156-159] ₀ This method involves acid guanidinium thiocyanate-chloroform extraction. That is, the tissue was homogenized with 4M guanidine isothiocyanate-25mM sodium citrate, 0.2M sodium acetate (pH4.0), and 1 volume of phenol and 1/5 volume of chloroform-isoamyl alcohol (49: 1), centrifuge after mixing. The aqueous layer was aspirated, isopropanol (0.8 vol) was added and the mixture was centrifuged to obtain RM precipitate. The obtained RM precipitate was washed with 70¾ ethanol, dried and dissolved in water. Using 2 (^ g RNA, on a 1.2% agarose gel containing 20mM 3- (N-morpholino) propanesulfonic acid (pH 7.0)-5mM sodium acetate-1mM EDTA-2. 2M formaldehyde electrophoresis then transferred to nitrocellulose by a -. ³² P dATP by random priming labeled Preparation ^{32 Ρ-} DM probe. The DM probe used was the PCR amplified human transcription factor 9.57 coding region sequence (308bp to 571bp) shown in FIG. 1. A 32P-labeled probe (approximately 2 × 10 ⁶ cpra / ral) was hybridized with a RM-transferred nitrocellulose membrane at 42 ° C. overnight in a solution containing 50 »/. Formamide-25raM KH ₂ P0 ₄ (pH7. 4) -5 x SSC-5 x Denhardt's solution and 20 (^ g / ml salmon sperm DNA. After hybridization, the filter was placed in 1 x SSC-0.1 SDS in 55 Wash 30miri at ° C. Then, analyze and quantify with Phosphor Imager. Example 4 In vitro expression, isolation and purification of recombinant human transcription factor 9.57

 Based on SEQ ID NO: 1 and the coding region sequence shown in Figure 1, a pair of specific amplification primers were designed, the sequence is as follows:

Primer 3: 5 '-CCCCATATGATGAAGAATATTTGTCTGAGTTTT-3' (Seq ID No: 5) Primer4: 5'-CATGGATCCTCAGGAAGTAGATAATCCAAATGG-3 '(Seq ID No: 6) The 5' ends of these two primers contain Mel and BamHI restriction sites, respectively , Followed by the coding sequences of the 5 'and 3' ends of the gene of interest, respectively, and the Ndel and BamHI restriction sites correspond to the expression vector plasmid pET-28b (+) (Novagen, Cat. No. 69865. 3) Selective endonuclease site. The pBS_0545F05 plasmid containing the full-length target gene was used as a template for the PCR reaction. The PCR reaction conditions were as follows: a total volume of 50 μ1 containing 10 pg of pBS-0545F05 plasmid, primers Primer-3 and Primer-4 were lOpmol, Advantage polymerase Mix (Clontech) 1 μ1, respectively. Cycle parameters: 94 ° C 20s, 60 ° C 30s, 68 ° C 2 min, a total of 25 cycles. Ndel and BamHI were used to double-digest the amplified product and plasmid pET-28 (+), respectively, and large fragments were recovered and ligated with T4 ligase. The ligation product was transformed into E. coli DH5 CC using the calcium chloride method. After being cultured overnight in LB plates containing kanamycin (final concentration 30 g / ml), positive clones were screened by colony PCR and sequenced. A positive clone (pET-0545F05) with the correct sequence was selected, and the recombinant plasmid was transformed into E. coli BL21 (DE3) plySs (product of Novagen) using the calcium chloride method. In containing kanamycin (final concentration of 30μ β _/ ηι1) in LB liquid medium, host strain BL21 _(P ET-0545F05) were cultured to logarithmic growth phase, IPTG was added to a final concentration of lmmol / L at 37 ° C, Continue incubation for 5 hours. The bacteria were collected by centrifugation, and the supernatant was collected by centrifugation, and the supernatant was collected by centrifugation. The affinity chromatography column His. Bind Quick Cartr idge (product of Novagen) was used for chromatography. 57. The purified human transcription factor 9.57 was obtained. After SDS-PAGE electrophoresis, a single band was obtained at 1 OkDa (Figure 2). The band was transferred to a PVDF membrane and the N-terminal amino acid sequence was analyzed by the Edams hydrolysis method. As a result, the 15 amino acids at the N-terminus were identical to the 15 amino acid residues at the N-terminus shown in SEQ ID NO: 2. Example 5 Production of anti-human transcription factor 9.57 antibodies

57 peptides specific for human transcription factor 9.57 were synthesized using a peptide synthesizer (product of PE Company): NH2-Met-Lys-Asn-I le-Cys-Leu-Ser-Phe-Leu-Val-Met-Ser-Leu-Pro-Gly-C00H

(SEQ ID NO: 7). The polypeptide is coupled to hemocyanin and bovine serum albumin to form a complex, respectively. For methods, see: Avrameas, et al. Immunochemistry, 1969; 6: 43. Rabbits were immunized with 4 mg of the hemocyanin polysaccharide complex plus complete Freund's adjuvant, and 15 days later, the hemocyanin polypeptide complex plus incomplete Freund's adjuvant was used to boost immunity once. A titer plate coated with lS g / ml bovine serum albumin peptide complex was used as an ELISA to determine the antibody titer in rabbit serum. Total IgG was isolated from antibody-positive rabbit serum using protein A-Sepharose. The peptide was bound to a cyanogen bromide-activated Se _P h _arOS e4B column, and the anti-peptide antibody was separated from the total IgG by affinity chromatography. 57。 Immunoprecipitation demonstrated that the purified antibody specifically binds to human transcription factor 9.57. Example 6 Application of the polynucleotide fragment of the present invention as a hybridization probe

 Suitable oligonucleotide fragments selected from the polynucleotides of the present invention are used as hybridization probes in a variety of ways. For example, the probes can be used to hybridize to genomic or cDNA libraries of normal tissue or pathological tissue from different sources to It is determined whether it contains the polynucleotide sequence of the present invention and a homologous polynucleotide sequence is detected. Further, the probe can be used to detect the polynucleotide sequence of the present invention or its homologous polynucleotide sequence in normal tissue or pathology. Whether the expression in tissue cells is abnormal.

 The purpose of this embodiment is to select a suitable oligonucleotide fragment from the polynucleotide SEQ ID NO: 1 of the present invention as a hybridization probe, and to identify whether some tissues contain the polynucleoside of the present invention by using a filter hybridization method. Acid sequence or a homologous polynucleotide sequence thereof. Filter hybridization methods include dot blotting, Southern imprinting, Northern blotting, and copying methods. They all use the same steps to immobilize the polynucleotide sample to be tested on the filter. These same steps are as follows: The sample-immobilized filter is first pre-hybridized with a probe-free hybridization buffer to saturate the non-specific binding site of the sample on the filter with the carrier and the synthesized polymer. The pre-hybridization solution is then replaced with a hybridization buffer containing labeled probes and incubated to hybridize the probes to the target nucleic acid. After the hybridization step, the unhybridized probes are removed by a series of membrane washing steps. This embodiment uses higher-intensity washing conditions (such as lower salt concentration and higher temperature), so that the hybridization background is reduced and only strong specific signals are retained. The probes used in this embodiment include two types: the first type of probes are oligonucleotide fragments that are completely the same as or complementary to the polynucleotide SEQ ID NO: 1 of the present invention; the second type of probes are partially related to the present invention The polynucleotide SEQ ID NO: 1 is the same or complementary oligonucleotide fragment. In this example, the dot blot method is used to fix the sample on the filter membrane. Under the high-intensity washing conditions, the first type of probe and the sample have the strongest hybridization specificity and are retained.

 First, the selection of the probe

The selection of oligonucleotide fragments from the polynucleotide SEQ ID NO: 1 of the present invention as hybridization probes should follow the following principles and several aspects to be considered: 1. The preferred range of probe size is 18-50 nucleotides;

 2, GC content is 30% -70%, non-specific hybridization increases when it exceeds;

 3. There should be no complementary regions inside the probe;

 4. Those that meet the above conditions can be used as primary selection probes, and then further computer sequence analysis, including the primary selection probe and its source sequence region (ie, SEQ ID NO: 1) and other known genomic sequences and their complements The regions are compared for homology. If the homology with the non-target molecular region is greater than 85% or there are more than 15 consecutive bases, the primary probe should not be used;

 5. Whether the preliminary selection probe is finally selected as a probe with practical application value should be further determined by experiments.

 After completing the above analysis, select and synthesize the following two probes:

 Probe 1 (probel), which belongs to the first type of probe, is completely homologous or complementary to the gene fragment of SEQ ID NO: 1 (41Nt):

 5'-TGAAGAATATTTGTCTGAGTTTTCTTGTAATGTCTTTACCT-3 '(SEQ ID NO: 8) Probe 1 (probe2), which belongs to the second type of probe, is equivalent to the replacement mutation sequence (41Nt) of the gene fragment or its complementary fragment of SEQ ID NO: 1: '

 5 '-TG AAGAAT ATTTGTCTGAGTCTTCTTGT AATGTCTTT ACCT- 3' (SEQ ID NO: 9) For other common reagents not listed in the following specific experimental procedures and their preparation methods, please refer to the literature: DNA PROBES GH Keller; M.M. Manak Stockton Press, 1989 (USA) and more commonly used molecular cloning laboratory manuals such as "Molecular Cloning Experiment Guide" (Second Edition 1998) [US] Sambrook et al., Science Press.

 Sample Preparation:

 1.Extract DNA from fresh or frozen tissue

Steps: 1) Place fresh or freshly thawed normal liver tissue in a plate immersed in ice and filled with phosphate buffered saline (PBS). Cut the tissue into small pieces with scissors or a scalpel. Tissue should be kept moist during operation. 2) Centrifuge the tissue at 1,000 g for 10 minutes. 3) Suspend the precipitate (about 10 ml / g) with cold homogenization buffer (0.25 mol / L sucrose; 25 pp ol / L Tris-HCl, pH 7.5; 25 mmol / L NaCl; 25 mmol / L MgCl ₂ ). 4) at 4. C Homogenize the tissue suspension at full speed with an electric homogenizer until the tissue is completely broken. 5) Centrifuge at 1000g for 10 minutes. 6) Resuspend the cell pellet (1-5 ml per 0.1 g of the initial tissue sample), and centrifuge at 1,000 g for 10 minutes. 7) Resuspend the pellet in lysis buffer (1 ml per 0.1 g of the initial tissue sample), and then follow the phenol extraction method below.

 2, phenol extraction method for DNA

Steps: 1) Wash the cells with 1-10ml of cold PBS and centrifuge at 1000g for 10 minutes. 2) Lysis with cold cells Resuspend the pelleted cells in liquid (1 x 10 ^s cells / ml) with a minimum of 100 μl lysis buffer. 3) Add SDS to a final concentration of 1%. If SDS is directly added to the cell pellet before resuspending the cells, the cells may form large clumps that are difficult to break, and reduce the overall yield. This is particularly serious when extracting> 10 ⁷ cells. 4) Add proteinase K to a final concentration of 200ug / ml. 5) 50. C. Incubate for 1 hour or shake gently at 37 ° C overnight. 6) Extract with an equal volume of phenol: chloroform: isoamyl alcohol (25: 24: 1) and centrifuge in a small centrifuge tube for 10 minutes. The two should be clearly separated, otherwise centrifuge again. 7) Transfer the water phase to a new tube. 8) Extract with an equal volume of chloroform: isoamyl alcohol (24: 1) and centrifuge for 10 minutes. 9) Transfer the aqueous phase containing DM to a new tube. The DNA was then purified and ethanol precipitated.

 3, DNA purification and ethanol precipitation

Steps: 1) Add 180 volumes of 2inoI / L sodium acetate and 2 volumes of cold 100% ethanol to the DNA solution and mix. At -20. C Let stand for 1 hour or overnight. 2) Centrifuge for 10 minutes. 3) Carefully aspirate or pour out the ethanol. 4) Wash the pellet with 500ul of 70% cold ethanol and centrifuge for 5 minutes. 5) Carefully aspirate or pour out the ethanol. Wash the pellet with 500ul of cold ethanol and centrifuge for 5 minutes. 6) Carefully aspirate or pour out the ethanol, then invert on the absorbent paper to drain off the residual ethanol. Air dry for 10-15 minutes to allow the surface ethanol to evaporate. Be careful not to allow the pellet to dry completely, otherwise it will be more difficult to re-dissolve. 7) Resuspend the DM pellet in a small volume of TE or water. Vortex at low speed or suck with a dropper, while gradually increasing TE, mix until the DNA is fully lysed, add approximately 1 ul per 1-5 × 10 ^δ cells extracted.

 The following steps 8-13 are only used when contamination must be removed, otherwise step 14 can be performed directly.

8) Add RNase A to DM solution to a final concentration of 100ug / ml, and incubate at 37 ° C for 30 minutes. 9) Add SDS and protease to a final concentration of 0.5% and 100ug / ml, respectively. Incubate at 37 ° C for 30 minutes. 10) Extract the reaction solution with an equal volume of phenol: chloroform: isoamyl alcohol (25: 24: 1) and centrifuge for 10 minutes. 11) Carefully remove the aqueous phase and re-extract with an equal volume of chloroform: isoamyl alcohol (24: 1) and centrifuge for 10 minutes. 12) Carefully remove the aqueous phase, add 1/10 volume of 2mol / L sodium acetate and 2.5 volumes of cold ethanol, and mix well--20 ° C for 1 hour. 13) Use 70% ethanol and 100 »/. Wash the pellet with ethanol, air dry, and resuspend the nucleic acid. The process is the same as steps 3-6. 14) _A26ΰ and A _{28β were measured} to check the purity and yield of DM. 15) Store at -20 ° C after dispensing.

 Preparation of sample film:

 1) Take 4x2 pieces of nitrocellulose membranes (NC membranes) of appropriate size, and mark the spotting position and sample number on it with a pencil. Two NC membranes are required for each probe, so that they can be used in the following experimental steps. The film was washed with high-strength conditions and strength conditions, respectively.

 2) Pipette and control 15 microliters each, spot on the sample film, and dry at room temperature.

3) Place on filter paper infiltrated with 0.1 lraol / L NaOH, 1.5mol / L NaCl for 5 minutes (twice), dry and place in 0.5mol / L Tris-HCl (pH7.0), 3mol / L NaCl filter paper for 5 minutes (two Times), dry.

 4) Clamped in clean filter paper, wrapped in aluminum foil, and dried under vacuum at 60-80 ° C for 2 hours.

 Labeling of probes

1) 3μ1 Probe (0.1OD / Ιθμΐ), add 2μ1 Kinase buffer, 8-10 uCi γ- ³² P-dATP + 2U Kinase, to make up to a final volume of 20μ1.

 2) Incubate at 37 ° C for 2 hours.

3) Add 1/5 volume of bromophenol blue indicator (BPB) ₀

 4) Pass through a Sephadex G-50 column.

5) Before the ³² P-Probe is washed out, collect the first peak (can be monitored by Monitor).

 6) 5 drops / tube, collect 10-15 tubes.

 7) Monitor the amount of isotope with a liquid scintillator.

8) The ³² P-Probe (the second peak is free γ- ³² P-dATP) after the collection of the first peak is combined.

 Pre-hybridization

 The sample membrane was placed in a plastic bag and 3-10 mg of prehybridization solution (10xDenhanU's; 6xSSC, 0.1 mg / ml CT DMA (calf thymus DM)) was added. After closing the bag, 68. C water bath for 2 hours.

 Cross

 Cut a corner of the plastic bag, add the prepared probe, seal the bag, and shake at 42 ° C in water overnight. Wash film:

 High-intensity washing film:

 1) Take out the sample membrane of hybridization.

 2) 2xSSC, 0.1% SDS, 40. C Wash for 15 minutes (twice).

 3) Wash in 0.1xSSC, 0.1 / oSDS at 40 ° C for 15 minutes (twice).

 4) 0. lxSSC, 0.1 ° /. Wash in SDS at 55 ° C for 30 minutes (twice) and dry at room temperature. Low-intensity washing film:

 1) Take out the hybridized sample membrane.

 2) 2xSSC, 0.1% SDS, wash at 37 ° C for 15 minutes (twice).

 3) Wash in 0.1xSSC, 0.1% SDS for 15 minutes at 37 ° C (twice).

4) In 0.1xSSC, 0.1¾SDS, wash at 40 ° C for 15 minutes (twice), and dry at room temperature. X-ray auto-development:

 -70 ° C, X-ray autoradiography (press time depends on the radioactivity of the hybrid spot).

 Experimental results:

 的 The hybridization experiments performed under low-intensity membrane washing conditions showed no significant difference in the radioactive intensity of the above two probe hybrid spots; while the hybridization experiments performed under high-intensity membrane washing conditions, the radioactive intensity of probe 1 was significantly stronger To the radioactive intensity of the hybridization spot of another probe. Therefore, the presence and differential expression of the polynucleotide of the present invention in different tissues can be analyzed qualitatively and quantitatively with the probe 1. Example 7 Let Microarray

 Gene chip or gene microarray (DM Microarray) is a new technology currently being developed by many national laboratories and large pharmaceutical companies. It refers to the orderly and high-density arrangement of a large number of target gene fragments on slopes. , Silicon and other carriers, and then use fluorescence detection and computer software to compare and analyze the data, in order to achieve the purpose of rapid, efficient, high-throughput analysis of biological information. The polynucleotide of the present invention can be used as target DNA for gene chip technology for high-throughput research of new gene functions; search for and screen new tissue-specific genes, especially new genes related to diseases such as tumors; diagnosis of diseases such as hereditary diseases . The specific method steps have been reported in the literature. For example, see DeRis i, JL, Lyer, V. & Brown, PO (1997) Science 278, 680-686. And Helle, RA, Schema, M., Chai, A., Shalom, D., (1997) PNAS 94: 2150-2155.

 (A) spotting

 A total of 4,000 polynucleotide sequences of various full-length cDNAs are used as targets DI, including the polynucleotides of the present invention. They were respectively amplified by PCR. After purification, the concentration of the amplified product was adjusted to about 500 ng / ul, and spotted on a glass medium with a Cartesian 7500 spotter (purchased from Cartesian Company, USA). The distance between them is 280 μm. The spotted slides were hydrated and dried, cross-linked in a UV cross-linker, and dried after elution to fix the DM on the glass slide to prepare chips. The specific method steps have been reported in the literature. The sample post-processing steps in this embodiment are:

 1. Hydration in a humid environment for 4 hours;

 2. 0.2% SDS was washed for 1 minute;

3. Wash twice with ddH ₂ 0 for 1 minute each time;

4. NaBH _{4 is} blocked for 5 minutes;

 5. 95. C water for 2 minutes;

 6. Wash with 0.2% SDS for 1 minute;

7. Rinse twice with ddH ₂ 0; 8. Dry and store at 25 ° C in the dark for future use.

 (Two) probe marking

It was extracted from the body with a one-step mixing with body tissue specific tissue (or cell line after stimulation) total mRNA, and washed with Ol igotex mRNA Midi Ki t (available from QiaGen Inc.) purified mRNA, reverse transcription divided by another ¹ J The fluorescent reagent Cy3dUTP (5-Amino-propargyl-2> -deoxyuridine 5'-triphate coupled to Cy3 fluorescent dye, purchased from Amersham Phamacia Biotech) was used to label the raRM of human mixed tissue, and the fluorescent reagent Cy5dUTP (5- Amino-propargy) was used. 2'- deoxyur idine 5 '-tr iphate coupled to Cy5 fluorescent dye, purchased from Amersham Phamacia Biotech Company, labeled the body's specific tissue (or stimulated cell line) tnRNA, and purified the probe to prepare a probe. For specific steps and methods, see:

 Schena, M., Shalon, D., Heller, R. (1996) Proc. Natl. Acad. Sci. USA. Vol. 93: 10614-10619. Schena, M., Sha lon, Dar i., Davi s, RW (1995) Sc ience. 270 (20): 467-480.

 (Three) cross

 The probes from the above two tissues and the chip were respectively hybridized in a UniHyb ™ Hybridizat ion Solut ion (purchased from TeleChem) hybridization solution for 16 hours, and washed with a washing solution (lx SSC, 0.2% SDS) at room temperature. Scanning was performed with a ScanArray 3000 scanner (purchased from General Scanning, USA), and the scanned images were analyzed and processed with Imagene software (Biodicovery, USA) to calculate the Cy3 / Cy5 ratio of each point.

 The above specific tissues (or stimulated cell lines) are bladder mucosa, PMA + Ecv304 cell line, LPS + Ecv304 cell line, thymus, normal fibroblasts 1024NC, Fibroblast, growth factor stimulation, 1024NT, scar-like fc growth factor Stimulation, 1013HT, scar into fc without stimulation with growth factors, 1013HC, bladder cancer cell EJ, bladder cancer, bladder cancer, liver cancer, liver cancer cell line, fetal skin, spleen, prostate cancer, jejunum adenocarcinoma, cardia cancer Based on these Cy3 / Cy5 ratios, a bar graph is drawn (Figure 1). It can be seen from the figure that the expression profiles of human transcription factor 9.57 and human transcription factor BTF3 according to the present invention are very similar.

Claims

Rights request

1. An isolated polypeptide-human transcription factor 9.57, characterized in that it comprises: a polypeptide having the amino acid sequence shown in SEQ ID NO: 2 or an active fragment, analog or derivative thereof.

 2. The polypeptide according to claim 1, characterized in that the amino acid sequence of the polypeptide, analog or derivative has at least 95% identity with the amino acid sequence shown in SEQ ID NO: 2.

 3. The polypeptide according to claim 2, characterized in that it comprises a polypeptide having the amino acid sequence shown in SEQ ID. NO: 2.

 4. An isolated polynucleotide, characterized in that said polynucleotide comprises one selected from the group consisting of:

 (a) a polynucleotide encoding a polypeptide having an amino acid sequence shown in SEQ ID NO: 2 or a fragment, analog, or derivative thereof;

 (b) a polynucleotide complementary to polynucleotide (a); or

 (c) A polynucleotide that is at least 70% identical to (a) or (b).

 5. The polynucleotide according to claim 4, wherein the polynucleotide comprises a polynucleotide encoding an amino acid sequence shown in SEQ ID NO: 2.

 6. The polynucleotide according to claim 4, characterized in that the sequence of the polynucleotide comprises the sequence of positions 308-571 in SEQ ID NO: 1 or the sequence of positions 1-799 in SEQ ID NO: 1. .

 7. A recombinant vector containing an exogenous polynucleotide, characterized in that it is a recombinant constructed from the polynucleotide according to any one of claims 4 to 6 and a plasmid, virus or vector expression vector Carrier.

 8. A genetically engineered host cell containing an exogenous polynucleotide, characterized in that it is selected from one of the following host cells:

 (a) a host cell transformed or transduced with the recombinant vector of claim 7; or

 (b) A host cell transformed or transduced with any of the polynucleotides of claim 4-6.

 9. A method for preparing a polypeptide having human transcription factor 9.57 activity, characterized in that the method includes:

 (a) culturing the engineered host cell of claim 8 under the condition of expressing human transcription factor 9.57;

 (b) Isolating a polypeptide having human transcription factor 9.57 activity from the culture.

10. An antibody capable of binding to a polypeptide, characterized in that the antibody is capable of binding to a human transcription factor

9. 57 specific binding antibodies.

 11. A class of compounds that mimic or regulate the activity or expression of a polypeptide, characterized in that they are compounds that mimic, promote, antagonize or inhibit the activity of human transcription factor 9.57.

 12. The compound according to claim 11, characterized in that it is an antisense sequence of a polynucleotide sequence or a fragment thereof as shown in SEQ ID NO :.

 13. Use of a compound according to claim 11, characterized in that the compound is used for a method for regulating the activity of human transcription factor 9.57 in vivo and in vitro.

 14. A method for detecting a disease or disease susceptibility related to the polypeptide according to any one of claims 1-3, characterized in that it comprises detecting the expression amount of the polypeptide, or detecting the polypeptide Activity, or detecting a nucleotide variation in a polynucleotide that causes abnormal expression or activity of the polypeptide.

 15. The use of a polypeptide according to any one of claims 1-3, characterized in that it is used to select a mimic, agonist, antagonist or inhibitor of the transcription factor 9.57; or for peptides Fingerprint identification.

 16. The use of a nucleic acid molecule according to any one of claims 4 to 6, characterized in that it is used as a primer for a nucleic acid amplification reaction, or as a probe for a hybridization reaction, or used to make a gene Chip or microarray.

 17. Use of a polypeptide, polynucleotide or compound according to any one of claims 1-6 and 11, characterized in that said polypeptide, polynucleotide or mimetic, agonist, antagonist is used Or the inhibitor is composed of a safe and effective dose with a pharmaceutically acceptable carrier as a pharmaceutical composition for diagnosing or treating a disease associated with human transcription factor 9.57 abnormality.

 18. The use of a polypeptide, polynucleotide or compound according to any one of claims 1-6 and 11, characterized in that the polypeptide, polynucleotide or compound is used for preparing for treating malignant tumors, blood, etc. Disease, HIV infection and immune diseases and drugs of various inflammations.