WO2001075085A1

WO2001075085A1 - A new polypeptide - human atp-dependent serine protease 11.3 and the polynucleotide encoding it

Info

Publication number: WO2001075085A1
Application number: PCT/CN2001/000514
Authority: WO
Inventors: Yumin Mao; Yi Xie
Original assignee: Biowindow Gene Development Inc. Shanghai
Priority date: 2000-03-29
Filing date: 2001-03-26
Publication date: 2001-10-11
Also published as: AU7377401A; CN1315569A

Abstract

The present invention discloses a new polypeptide - human ATP-dependent serine protease 11.3, the polynucleotide encoding it and a method producing the polypeptide by DNA recombinant technology. The present invention further discloses a method for treating various disorders, e.g., malignant neoplasm, hematopathy, HIV infection and immunological diseases and various inflammations etc.. The present invention also discloses an antagonist of the polypeptide and its therapeutic use. The present invention further discloses the use of the polynucleotide encoding the new human ATP-dependent serine protease 11.3.

Description

A new peptide-human ATP-dependent serine protease 11.3 and

Polynucleotide encoding such a polypeptide

The present invention belongs to the field of biotechnology. Specifically, the present invention describes a new polypeptide, a human ATP-dependent serine proteolytic enzyme 11.3, and a polynucleotide sequence encoding the polypeptide. The invention also relates to methods and applications for preparing such polynucleotides and polypeptides. Background technique

In mammals and yeast, members of the Lon-type proteolytic enzyme family catalyze the ATP-dependent degradation of mitochondrial matrix proteins. People have cloned a variety of members of the Lon proteolytic enzyme family from bacteria, yeast, and humans, and found that human L0N proteolytic enzymes are expressed in various tissues, and these proteins are encoded in the nucleus of the cell. The N-terminus of the amino acid sequence contains a potential mitochondrial prelocalization sequence [Wang N., Gottesman S. et al., 1993, Prog N tl Acad Sci USA, 90: 11247-11251].

In 1998, Barakat S. and others cloned the L0N1 protein from maize, which is a new member of the Lon-type proteolytic enzyme family. The L0N1 protein is highly similar to known bacterial and human Lon proteolytic enzymes in protein sequence, and both have a conserved substrate binding domain and an ATP binding domain; and the protein is related to the Lon protein family. The other members have similar biological functions and are closely related to the biological respiration process in the body, which can maintain the integrity of the mitochondrial medicine, but is not a component of the cytochrome complex [Barakat S., Pearce DA. Et al., 1998, Plant Mol Biol, 37: 141-154]. It can be known from the above that members of the Lon proteolytic enzyme family have a wide range of biological functions in the body. Abnormal expression will cause abnormal mitochondrial DNA structure, and affect the function of the respiratory chain, resulting in abnormal metabolism of matter and energy.

Members of the Lon proteolytic enzyme family rely on the energy released by ATP hydrolysis and their serine active sites in their catalytic active centers to exert their enzymatic activities. The N-terminus of members of the enzyme family contains a conserved ATP-binding domain that is responsible for binding to ATP in the organism to hydrolyze ATP and provide the energy required for the enzyme to function; in addition, the enzyme family The members also contain the following conservative consensus sequence fragments: DG- [PD] -SA- [GS]-[LIVMCA]-[TA]-[LI VM] (where S is the active serine site); The sequence fragment is The catalytic active center of the enzyme plays an important role in the normal physiological function of the enzyme. Mutations in this sequence will affect the catalytic activity of the enzyme in the organism.

Analysis by gene chip found that in the thymus, testis, muscle, spleen, lung, skin, thyroid, Liver, PMA + Ecv304 cell line, PMA- Ecv304 cell line, Unstarved L02 cell line, Arsenic stimulated L02 cell line for 1 hour, Arsenic stimulated L02 cell line for prostate, heart, lung cancer, fetal bladder, fetal small intestine , Fetal large intestine, fetal thymus, fetal muscle, fetal liver, fetal kidney, fetal spleen, fetal brain, fetal lung, and fetal heart, the expression profile of the polypeptide of the present invention is very similar to the expression profile of human ATP-dependent serine protease 48 Approximately, so the functions of the two may be similar. 3。 The present invention is named human ATP-dependent serine protease 11.3.

As described above, the human ATP-dependent serine proteolytic enzyme 11.3 protein plays an important role in regulating important functions of the body such as cell division and embryonic development, and it is believed that a large number of proteins are involved in these regulatory processes, so identification in the art has been required. More human ATP-dependent serine protease 11.3 proteins involved in these processes, especially the amino acid sequence of this protein was identified. The newcomer's ATP-dependent serine proteolytic enzyme 11.3 The isolation of protein-coding genes also provides a basis for research to determine the role of this protein in health and disease states. This protein may form the basis for the development of diagnostic and / or therapeutic drugs for diseases, so it is important to isolate its coding DNA. Disclosure of invention

It is an object of the present invention to provide isolated novel polypeptides-human ATP-dependent serine proteolytic enzymes III, 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 ATP-dependent serine proteolytic enzyme 11.3.

Another object of the present invention is to provide a genetically engineered host cell comprising a polynucleotide encoding a human ATP-dependent serine proteolytic enzyme 11.3.

Another object of the present invention is to provide a method for producing human ATP-dependent serine proteolytic enzyme 11.3.

Another object of the present invention is to provide an antibody against the polypeptide of the present invention-human ATP-dependent serine proteolytic enzyme 11.3.

Another object of the present invention is to provide mimic compounds, antagonists, agonists, and inhibitors against the human ATP-dependent serine protein hydrolase 11.3 of the polypeptide of the present invention.

Another object of the present invention is to provide a method for diagnosing and treating diseases associated with human ATP-dependent serine protease II. 3 abnormalities.

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 polypeptide is Dosas 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 D. 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 84-495 in SEQ ID NO: 1; and (b) a sequence having positions 1-1 in SEQ ID NO: 1 1 660-bit sequence.

The invention further relates to a vector, in particular an expression vector, containing the polynucleotide of the invention; a host cell genetically engineered with the vector, including a transformed, transduced or transfected host cell; and a method comprising culturing said 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 present invention also relates to a method for screening compounds that mimic, activate, antagonize or inhibit human ATP-dependent serine protein hydrolase 1 1.3 protein activity, which comprises utilizing the polypeptide of the present invention. The invention also relates to compounds obtained by this method.

The present invention also relates to a method for in vitro detection of a disease or disease susceptibility related to abnormal expression of human ATP-dependent serine proteolytic enzyme III protein, comprising detecting the polypeptide in a biological sample or its encoding polynucleotide sequence. Mutates, or detects the amount or biological activity of a polypeptide of the invention in a biological sample.

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

The present invention also relates to the preparation of a medicament of the polypeptide and / or polynucleotide of the present invention for the treatment of cancer, developmental disease or immune disease or other diseases caused by abnormal expression of human ATP-dependent serine proteolytic enzyme 1 1.3. the use of.

Other aspects of the invention will be apparent to those skilled in the art from the disclosure of the techniques herein.

The following terms used in this specification and claims have the following meanings unless specifically stated otherwise:

"Nucleic acid sequence" refers to oligonucleotides, nucleotides or polynucleotides and fragments or parts thereof, and can also refer to genomic or synthetic DNA or RNA, which can be single-stranded or double-stranded, representing the sense strand 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 nucleotide sequence. Variants can have "conservative" changes, where substitutions Amino acids have similar structural or chemical properties as the original amino acids, such as replacing 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" refers to an alteration in the amino acid sequence or nucleotide sequence that results in an increase in one or more amino acids or nucleotides compared to a naturally occurring molecule. "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 to specific antibodies in a suitable animal or cell.

An "agonist" refers to a molecule that, when combined with a human ATP-dependent serine proteolytic enzyme 1 1.3, can cause the protein to change, thereby regulating the activity of the protein. An agonist may include a protein, a nucleic acid, a carbohydrate, or any other molecule that can bind to a human ATP-dependent serine protease 1 1.3.

An "antagonist" or "inhibitor" refers to a biological activity that blocks or regulates human ATP-dependent serine protease 1 1.3 when combined with human ATP-dependent serine protease 1 1.3. Or immunologically active molecules. Antagonists and inhibitors may include proteins, nucleic acids, carbohydrates, or any other molecule that binds human ATP-dependent serine proteolytic enzymes 1.1.3.

"Regulation" refers to a change in the function of human ATP-dependent serine protease 1 1.3, including any increase or decrease in protein activity, changes in binding characteristics, and any of human ATP-dependent serine protease 1 1.3. Changes in other biological, functional or immune properties.

"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 ATP-dependent serine proteolytic enzymes using standard protein purification techniques 1 1.3. Substantially pure human ATP-dependent serine protease 1 1.3 produces a single main band on a non-reducing polyacrylamide gel. Human ATP-dependent serine protease 1 1.3 Purity of peptides 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 can 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. The inhibition of such hybridization can be detected by performing hybridization (Southern blot or Northern blot, etc.) under conditions of reduced stringency. Substantially homologous sequences or hybridization probes can compete and inhibit complete homology Binding of the target sequence 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 the same or similar in the comparison of two or more amino acid or nucleic acid sequences. The percent identity can be determined electronically, such as through the MEGALIGN program (Lasergene software package, DNASTAR, Inc., Madison Wis.). The MEGALIGN program can compare two or more sequences according to different methods such as the Cluster method (Higgins, D. G. and P.M. Sharp (1988) Gene 73: 237-244). The Clus ter method arranges groups of sequences into clusters by checking the distance between all pairs. 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: The number of matching residues between sequence A and sequence X 100 The number of residues in sequence A-the number of spacer residues in sequence A The number of spacer residues in a sequence B can also be determined by the Cluster method or by a method known in the art such as Jotun Hein. The percent identity between nucleic acid sequences (Hein J., (1990) Methods in emzumology 183: 625-645).

"Similarity" refers to the degree of identical or conservative substitutions of amino acid residues at corresponding positions in the alignment of amino acid sequences. Amino acids used for conservative substitutions, 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. The "antisense strand" refers to a nucleic acid strand that is complementary to the "sense strand".

"Derivative" refers to a chemical modification of HFP or a nucleic acid encoding it. Such a chemical modification may be a substitution of a hydrogen atom with a fluorenyl group, an acyl group or an amino group. Nucleic acid derivatives can encode polypeptides that retain the main biological characteristics of natural molecules.

"Antibody" refers to a complete antibody molecule and its fragments, such as Fa,? (') ₂ and? It specifically binds the epitope of human ATP-dependent serine proteolytic enzyme 11.3.

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 occurs naturally). For example, a naturally occurring polynucleotide or polypeptide is not isolated when it is present in a living animal, 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 vector, or it may be The polynucleotide or polypeptide is part of a certain composition. Since the carrier or combination 4 is not a component 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 existing in the natural state. .

As used herein, "isolated human ATP-dependent serine proteolytic enzyme 1 1.3" means human ATP-dependent serine proteolytic enzyme 1 1. 3 is substantially free of other proteins, lipids, and sugars naturally associated with it. Or other substances. Those skilled in the art can purify human ATP-dependent serine proteolytic enzymes using standard protein purification techniques 1 1.3. Substantially pure polypeptides can produce a single main band on a non-reducing polyacrylamide gel. Human ATP-dependent serine protease 11.3 The purity of the peptide can be analyzed by amino acid sequence.

The present invention provides a new polypeptide, a human ATP-dependent serine proteolytic enzyme 1 1.3, 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, or a synthetic polypeptide, and preferably a recombinant polypeptide. The polypeptides of the present invention may be naturally purified products or chemically synthesized products, or produced using recombinant techniques from prokaryotic or eukaryotic hosts (eg, bacteria, yeast, higher plants, insects, and mammalian 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 ATP-dependent serine proteolytic enzymes 1.1.3. As used in the present invention, the terms "fragment", "derivative" and "analog" refer to a polypeptide that substantially maintains the same biological function or activity of the human ATP-dependent serine proteolytic enzyme 11.3 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 type 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 UV) a type in which the additional amino acid sequence is fused into the mature polypeptide and formed by the polypeptide sequence ( Such as the leader sequence or secreted sequence or the sequence used to purify this 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 a nucleoside of SEQ ID NO: 1 Acid sequence. The polynucleotide of the present invention is found from a cDNA library of human fetal brain tissue. It contains a polynucleotide sequence of 1 660 bases in length and its open reading frame 184-495 encodes 103 amino acids. According to the comparison of gene chip expression profiles, it was found that this polypeptide has a similar expression profile to human ATP-dependent serine protease 48, and it can be deduced that the human ATP-dependent serine protease 1 1.3 has human ATP-dependent serine proteolysis Enzyme 48 has similar functions.

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 it may be a degenerate variant. As used herein, the "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 that includes the polypeptide and a polynucleotide that includes 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. This polynucleotide variant can be a naturally occurring allelic variant or a non-naturally occurring variant. 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 (having 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, 60 ° C; or (2) 1 ° /。 When hybridizing with a denaturant, such as 50% (v / v) formamide, 0.1 ° /. Calf serum / 0.1% F i co l l, 42 'C, etc .; or (3) hybridization occurs only when the identity between the two sequences is at least 95% or more, and more preferably 97% or more. In addition, 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, preferably at least 100 nucleotides. Nucleic acid fragments can also be used in nucleic acid amplification techniques, such as PCR, to identify and / or isolate polynucleotides encoding human ATP-dependent serine proteolytic enzymes 11.3.

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 ATP-dependent serine proteolytic enzyme 11.3 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 cDNA libraries to detect homologous polynucleotide sequences, and 2) antibody screening of expression libraries to detect cloned polynucleosides with common structural characteristics Acid fragments.

The DNA fragment sequence of the present invention can also be obtained by the following methods: 1) isolating the double-stranded DNA sequence from the genomic DNA; 2) chemically synthesizing the DNA sequence to obtain the double-stranded DNA 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 mRNA from donor cells that overexpress the gene 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). Construction of cDNA libraries is also a common method (Sambrook, et al., Molecular Cloning, A Laboratory Manua 1, Cold Spring Harbor Laboratory. New York, 1989). Commercially available cDNA libraries are also available, such as different cDNA libraries from Clontech. When combined with polymerase reaction technology, even very small expression products can be cloned.

The genes of the present invention can be selected from these cDNA libraries by conventional methods. These methods include, but are not limited to: (l) DNA-DNA or DNA-RNA hybridization; (2) the presence or absence of marker gene functions; (3) determination of the level of human ATP-dependent serine protease 11.3 transcripts (4) Detecting protein products expressed by genes through immunological techniques or measuring biological activity. 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 2,000 nucleotides, preferably within 1000 nucleotides. The probe used here is generally a DNA 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 11.3 gene expression of human ATP-dependent serine protease can be detected by immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELISA).

Methods for Amplifying DNA / RNA Using PCR Technology (Saiki, et al. Science 1985; 230: 1350-1354) It is preferably used to obtain the gene of the present invention. In particular, when it is difficult to obtain full-length cDNA from a library, the RACE method (RACE-rapid amplification of cDNA ends) can be preferably used. The primers used for PCR can be appropriately based on the polynucleotide sequence information of the present invention disclosed herein. Select and synthesize using conventional methods. The amplified DNA / RNA 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 determined 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. In order to obtain the full-length cDNA sequence, sequencing must 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 the polynucleotide of the present invention, and a host cell that is genetically engineered using the vector of the present invention or directly using a human ATP-dependent serine proteolytic enzyme 11.3 coding sequence, and that recombinant technology is used to produce the present invention. Polypeptide method.

In the present invention, a polynucleotide sequence encoding a human ATP-dependent serine proteolytic enzyme 11.3 may 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 expressed in bacteria (Rosenberg, et al. Gene, 1987, 56: 125); pMSXND expression vectors expressed in mammalian cells ( Lee and Nathans, J Bio Chem. 263: 3521, 1988) and baculovirus-derived vectors expressed in insect cells. In short, as long as it can be replicated and stabilized in the host, any plasmid and vector can be used to construct a recombinant expression vector. An important feature of expression vectors is that they usually contain an origin of replication, a promoter, a marker gene, 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 ATP-dependent serine proteolytic enzyme 11.3 and appropriate transcription / translation 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 DNA sequence can be operably linked to an appropriate promoter in an expression vector to guide mRNA 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 and a transcription terminator for translation initiation. 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. To promoters to enhance gene transcription. Illustrative 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 ATP-dependent serine proteolytic enzyme 11.3 or a recombinant vector containing the polynucleotide can be transformed or transduced into a host cell to form a genetically engineered host containing the polynucleotide or the recombinant vector. cell. 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: Escherichia 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 absorbing DNA can be harvested after the exponential growth phase and treated with CaCl ^. The steps used are well known in the art. Alternatively, MgCl ₂ is used. If necessary, transformation can also be performed by electroporation. When the host is a eukaryotic organism, the following DNA transfection methods can be used: calcium phosphate co-precipitation method, or conventional mechanical methods such as microinjection, electroporation, and liposome packaging.

The polynucleotide sequence of the present invention can be used to express or produce recombinant human ATP-dependent serine protease 11.3 by conventional recombinant DNA technology (Science, 1984; 224: 1431). Generally speaking, there are the following steps:

(1) using the polynucleotide (or variant) of the present invention encoding human human ATP-dependent serine proteolytic enzyme 11.3, 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 desired, recombinant proteins can be isolated and purified by various separation methods using their 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, ionization Exchange chromatography, high performance liquid chromatography (HPLC), and various other liquid chromatography techniques and combinations of these methods. Brief description of the drawings

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

FIG. 1 is a comparison diagram of gene chip expression profiles of human ATP-dependent serine proteolytic enzyme 11.3 and human ATP-dependent serine proteolytic enzyme 48 of the present invention. The upper graph is a graph of the expression profile of human ATP-dependent serine protease 11.3, and the lower graph is the graph of the expression profile of human ATP-dependent serine protease 48. Among them, 1 indicates fetal kidney, 2 indicates fetal large intestine, 3 indicates fetal small intestine, 4 indicates fetal muscle, 5 indicates fetal brain, 6 indicates fetal bladder, 7 indicates non-starved L02, 8 indicates L02 +, lhr, As ³⁺ , and 9 indicates ECV304 PMA-, 10 means ECV304 PMA +, 11 means fetal liver, 12 means normal liver, 13 means thyroid, 14 means skin, 15 means fetal lung, 16 means lung, 17 means lung cancer, 18 means fetal spleen, 19 means spleen, 20 Indicates prostate, 21 indicates fetal heart, 22 indicates heart, 23 indicates muscle, 24 indicates testis, 25 indicates fetal thymus, and 26 indicates thymus.

Figure 2 shows the polyacrylamide gel electrophoresis (SDS-PAGE) of the isolated human ATP-dependent serine proteolytic enzyme 11.3. llkDa is the molecular weight of the protein. The arrow indicates the isolated protein band. The best way to implement the invention

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. In the following examples, the experimental methods without specific conditions are generally performed according to conventional conditions such as Sambrook et al., Molecular Cloning: The conditions described in the laboratory manual (New York: Cold Spring Harbor Laboratory Press, 1989), or according to the manufacturer Suggested conditions.

Example 1: Cloning of human ATP-dependent serine protease 11.3

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 Isolation Kit (Qiegene). 2ug poly (A) mRNA forms c-intestine through reverse transcription. The Smart cDNA cloning kit (purchased from Clontech) was used to insert the cDNA fragments into the multicloning site of pBSK (+) vector (Clontech) to transform DH5α to form a cDNA library. With Dye The terminate cycle react ion sequencing kit (Perkin-Elmer) and the ABI 377 automatic sequencer (Perkin-Elmer) determined the sequences at the 5 'and 3' ends of all clones. The determined cDNA sequence was compared with the existing public DNA sequence database (Genebank), and it was found that the cDNA sequence of one of the clones 0176cOS was new DNA. A series of primers were synthesized to determine the inserted cDNA fragments of the clone in both directions. The results show that the full-length cDNA contained in the 0176c08 clone is 1660bp (as shown in Seq ID N0: 1), and there is a 311bp open reading frame (0RF) from 184bp to 495bp, which encodes a new protein (such as Seq ID NO : As shown in 2). We named this clone pBS-0176c08 and the encoded protein was named human ATP-dependent serine protease 11.3. Example 2: Cloning of a gene encoding human ATP-dependent serine proteolytic enzyme 11.3 by RT-PCR

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

Primerl: 5'- GACAACATTGTGAAGCATTACTCC-3, (SEQ ID NO: 3)

Primer2: 5 "-AAATAGACATATAAAATTTAATTC-3 '(SEQ ID NO: 4)

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

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

Amplification conditions: 50 μl of ol / L KC1, 10 μl / L of Tris-CI, (pH8.5), 1.5 mmol / L MgCl ₂ , 200 μ mol / L dNTP in a reaction volume of 50 μ 1 , lOpmol primer, 1U of Taq DNA polymerase (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-actin was set as a positive control and template blank was set as a negative control. The amplified product was purified using a QIAGEN kit and ligated to a PCR vector using a TA cloning kit (Invitrogen product). DNA sequence analysis results showed that the DM sequence of the PCR product was exactly the same as the 1-1660bp shown in SEQ ID NO: 1. Example 3: Northern blot analysis of human ATP-dependent serine protease 11.3 gene expression:

Total RNA extraction in one step [Anal. Biochem 1987, 162, 156-159]. This method involves acid guanidinium thiocyanate phenol-chloroform extraction. That is, the tissue is homogenized with 4M guanidinium 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 ), Mix and centrifuge. Aspirate the aqueous layer, add isopropanol (0.8 vol) and centrifuge the mixture to obtain RNA precipitate. The resulting RNA pellet was washed with 70% ethanol, dried and dissolved in water. Using 20 g of RNA, electrophoresis was performed on a 1.2% agarose gel containing 20 mM 3- (N-morpholino) propanesulfonic acid (H7.0)-5 mM sodium acetate-1 mM EDTA-2.2M formaldehyde. Then transfer Onto nitrocellulose membrane. ³² -P-labeled DNA probes were prepared by a random primer method using a ^- 32PdATP. The DNA probe used was the PCR-amplified human ATP-dependent serine protease 11.3 coding region sequence (184bp to 495bp) shown in FIG. A 32P-labeled probe (approximately 2 × 10 ⁶ cpm / ml) and a nitrocellulose membrane to which RNA was transferred were placed in a solution at 42 ° C. C hybridization overnight, the solution contains 50% formamide-25mM KH ₂ P0 ₄ (pH7.4)-5 x SSC-5 x Denhardt's solution and 200 μg / ml salmon sperm DNA. After hybridization, the filters were placed in 1 x SSC-0.1% SDS at 55. C Wash for 30min. Then, Phosphor Imager was used for analysis and quantification. Example 4: In vitro expression, isolation and purification of recombinant human ATP-dependent serine proteolytic enzyme 11.3

According to SEQ ID NO: 1 and the coding region sequence shown in FIG. 1, a pair of specific amplification primers was designed. The sequences are as follows:

Primer3: 5'- CCCCATATGATGTCGCCAGCACAGGTCTATGTC- 3, (Seq ID No: 5)

Primer4: 5'- CATGGATCCCTATCGCCTTTTCTGACTTCTGCT- 3 '(Seq ID No: 6)

The 5 'ends of these two primers contain Ndel and BamHI restriction sites, respectively, followed by the coding sequences of the 5' and 3 'ends of the target gene, respectively. The Nde I and BamH I restriction sites correspond to the expression vector plasmid pET- Selective endonuclease site on 28b (+) (product of Nova gen, Cat. No. 69865.3). PCR was performed using the pBS-0176c08 plasmid containing the full-length target gene as a template. The PCR reaction conditions were as follows: a total volume of 50 μ1 containing 10 pg of pBS-0176c08 plasmid, primers Primer-3 and Primer-4, and ¹ J was lOpmol, Advantage polymerase Mix (Clontech) 1 μ1. 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 DH5a by the calcium chloride method. After being cultured overnight on LB plates containing kanamycin (final concentration 30 μg / ml), positive clones were selected by colony PCR method and sequenced. A positive clone ( _P ET-0176c08) with a 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 LB liquid medium containing kanamycin (final concentration 30 μg / ml), the host strain BL21 (pET-0176c08) was at 37. C. Cultivate to logarithmic growth phase, add IPTG to a final concentration of 1 ol / L, and continue to cultivate 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 Cartridge (product of Novagen) was used for chromatography to obtain 6 histidine (6His-Tag). Purified the target protein human ATP-dependent serine protease 11.3. After SDS-PAGE electrophoresis, a single band was obtained at llkDa (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 ATP-dependent serine protease 11.3 antibody A peptide synthesizer (product of PE company) was used to synthesize the following peptides specific for human ATP-dependent serine protease 11.3:

NH2-Met-Ser-Pro-Ala-Gln-Val-Tyr-Val-Glu-Gly-Met-Gly-Ser-Leu-Gln-C00H (SEQ ID NO: 7). The polypeptide is coupled to hemocyanin and bovine serum albumin to form a complex, respectively. For the method, see: Avrameas, et al. I. Unochemi Stry, 1969; 6: 43. Rabbits were immunized with 4 mg of the above-mentioned cyanin peptide 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.釆 The titer of antibody in rabbit serum was measured by ELISA using a 15 g / ml bovine serum albumin peptide complex-coated titer plate. Protein A-Sepharose was used to isolate total IgG from antibody-positive rabbit sera. The peptide was bound to a cyanogen bromide-activated Sepharose4B column, and anti-peptide antibodies were separated from the total IgG by affinity chromatography. Immunoprecipitation demonstrated that the purified antibody specifically binds to human ATP-dependent serine proteolytic enzyme 11.3. 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 a filter hybridization method. Acid sequence or a homologous polynucleotide sequence thereof. Filter hybridization methods include dot blotting, Southern blotting, Northern blotting, and copying methods. They are all used to fix the polynucleotide sample to be tested on the filter and then hybridize using basically the same steps. 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 synthetic 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. In this embodiment, higher-intensity washing conditions (such as lower salt concentration and higher temperature) are used to reduce the hybridization background and retain only strong specific signals. 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 embodiment, 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 for use 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 preliminary selection probes, and then further computer sequence analysis, including the preliminary selection The probes are compared for homology with their source sequence region (ie, SEQ ID NO: 1) and other known genomic sequences and their complementary regions, if the homology with the non-target molecular region is greater than 85% or there are more than 15 Consecutive bases are exactly the same, the primary probe should generally 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-TGTCGCCAGCACAGGTCTATGTCGAGGGAATGGGTTCCTTG-3 '(SEQ ID NO: 8)

Probe 2 (probe2), which belongs to the second type of probe, is equivalent to the replacement mutant sequence (41Nt) of the gene fragment of SEQ ID NO: 1 or its complementary fragment:

5 -TGTCGCCAGCACAGGTCTATCTCGAGGGAATGGGTTCCTTG-3 '(SEQ ID NO: 9)

Please refer to the literature for other commonly listed reagents and their preparation methods related to the following specific experimental procedures: DNA PROBES GH Keller; MM Manak; Stockton Press, 1989 (USA) and more commonly used molecular cloning experiment manual books such as "Molecular Cloning" (Experimental Guide, U998, 2nd Edition) [US] Sam Brook, 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) cold homogenization buffer (0.25mol / L sucrose; Implicit ²⁵ ol / L Tris-HCl, pH7.5 ; 25 recite ol / LnaCl; 25mmol / L MgCl 2) was suspended precipitate (approximately 10ml / g). 4) Homogenize the tissue suspension at 4 ° C 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 (add 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 with lysis buffer (lral 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 1-10 ml of cold PBS and centrifuge at 1,000 g for 10 minutes. 2) Resuspend the pelleted cells with cold cell lysate (1 x 10 ⁸ cells / ml) and apply a minimum of 100 ul of 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) Incubate at 50 ° C for 1 hour or shake gently at 37 ^Q 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 DNA to a new tube. The DNA was then purified and ethanol precipitated.

3, DNA purification and ethanol precipitation

Steps: 1) Add 10 volumes of 2mol / L sodium acetate and 2 volumes of cold 100% ethanol to the DNA solution and mix. Leave at -20 ° C 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. Take care not to allow the pellet to dry completely, Otherwise it is more difficult to re-dissolve. 7) Resuspend the DNA pellet in a small volume of TE or water. Low-speed vortexing or pipetting, with a dropper, while gradually increasing the TE, mixed until fully dissolved DNA, every ^1- 5 X 10 ό extracted cells plus about lul.

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 the DNA solution to a final concentration of 100 ug / ml, and incubate at 37 ° C for 30 minutes. 9) Add SDS and proteinase K, the final concentrations are 0.5% and 100ug / ml, respectively. 37. C was held 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 water phase, add 1/10 volume of 2mol / L sodium acetate and 2.5 volumes of cold ethanol, mix and set at -20 ° C for 1 hour. 13) Wash the pellet with 70% ethanol and 100% ethanol, air dry, and resuspend the nucleic acid. The process is the same as steps 3-6. 14) Determination of A ₂₆₀ and A ₂₈ . To detect the purity and yield of DNA. 15) Store at -20 ° C after dispensing.

Preparation of sample film:

1) Take 4 x 2 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 In the experimental steps, the film was washed with high-strength conditions and strength conditions, respectively.

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

3) Place on filter paper impregnated with 0.1 mol / L NaOH, 1.5 mol / L NaCl for 5 minutes (twice), and dry in 0.5 mol / L Tris-HCl (pH 7.0), 3 mol / L aCl Leave on filter paper for 5 minutes (twice) and dry.

4) Clamp in clean filter paper, wrap with aluminum foil, and dry under vacuum at 60-80 C for 2 hours.

Labeling of probes

1) 3 μl Probe (0.1 IOD / Ιθμ 1), add 2 μ I inase buffer, 8-10 uCi γ- ³² P- dATP + 2U Kinase, to make up to a final volume of 20 μ 1.

2) Incubate at 37 ° C for 2 hours.

3) Add 1/5 volume of Bromophenol Blue Indicator (BPB).

4) Pass through a Sephadex G-50 column.

5) Before the ³² P-Probe is washed out, start collecting 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) After combining the collection solutions of the first peak, the ³² P-Probe (the second peak is free γ- ³² P-dATP) is prepared. Pre-hybridization

The sample membrane was placed in a plastic bag, and 3-10 mg of prehybridization solution (lOxDenhardt's; 6xSSC, 0.1 mg / ml) was added.

CT DNA (calf thymus DNA). ) After sealing the bag, shake at 68 ° C 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 hybridized sample membrane.

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

3) In 0.1xSSC, 0.1% SDS, wash at 0 ° C for 15 minutes (twice).

4) In 0.1xSSC, 0.1% SDS, wash 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) 0. IxSSC, 0.1% SDS, wash at 37 ° C for 15 minutes (twice).

4) Wash in 0.1xSSC, 0.1% SDS 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:

The hybridization experiments performed under low-intensity membrane washing conditions showed no significant difference in the radioactive intensity of the above two probes. However, in the hybridization experiments performed under high-intensity membrane washing conditions, the radioactive intensity of probe 1 was significantly stronger than that of hybridization spots. The radioactive intensity of the hybridization spot of the other probe. Therefore, probe 1 can be used to qualitatively and quantitatively analyze the presence and differential expression of the polynucleotide of the present invention in different tissues. Example 7 DNA Microarray

Gene microarrays or DNA microarrays are new technologies 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 glass, The data is compared and analyzed on a carrier such as silicon using fluorescence detection and computer software to achieve the purpose of rapid, efficient, and 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 and functions; search for and screen new tissue-specific new genes, especially new genes related to diseases such as tumors; diagnosis of diseases such as inheritance Sexually transmitted diseases. The specific method steps have been reported in the literature, for example, see the literature DeRisi, J. L., Lyer, V. & Brown, P.0.

(1997) Science 278, 680-686. And literature Helle, R. A., 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 target DNA, including the polynucleotide of the present invention. They were amplified by PCR respectively. 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 spotting instrument (purchased from Cartesian, USA). The distance is 280 μη. The spotted slides were hydrated, dried, and cross-linked in a UV cross-linker. After elution, the slides were fixed to fix the DNA on the glass slides to prepare chips. The specific method steps have been reported in the literature in various ways. The post-spot processing steps of 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

They were extracted from the body with a one-step mixing with body tissue specific tissue (or cell line after stimulation) total mRNA, and treated with Oligotex mRNA Midi Kit (available from QiaGen Inc.) purified raRNA, ¹ J to burn the other points by reverse transcription Cy3dUTP (5-Amino-propargy l-2'-deoxyur idine 5--tr iphate coupled to Cy3 fluorescent dye, purchased from Amersham Phamacia Biotech) was used to label the mRNA of human mixed tissue, and J Cy5dUTP ( 5-Amino-propargyl-2--deoxyur idine 5'-tr iphate coupled to Cy5 fluorescent dye (purchased from Amersham Phamacia Biotech) was used to label the mRNA of specific tissues (or stimulated cell lines) of the body, and probes were prepared after purification. . For specific steps and methods, see:

Schena, M., Shalon, D., Heller, R. (1996) Proc. Natl. Acad. Sci. USA. Vol. 93: 10614-10619. Schena, M., Shalon, Dar i., Davis, RW ( 1995) Science.270. (20): 467-480. (3) Hybridization

The probes from the two types of tissues and the chips were hybridized in a UniHyb ™ Hybridization Solution (purchased from TeleChem) hybridization solution for 16 hours, washed with a washing solution (1 x SSC, 0.2% SDS) at room temperature, and then scanned with ScanArray 3000. The scanner (purchased from General Scanning Company, USA) was used for scanning. The scanned image was analyzed and processed with Imagene software (Biodiscovery Company, USA) to calculate the Cy3 / Cy5 ratio of each point.

The above specific tissues (or stimulated cell lines) are thymus, testis, muscle, spleen, lung, skin, thyroid, liver, PMA + Ecv304 cell line, PMA-Ecv304 cell line, non-starved L02 cell line, L02 cell line stimulated by arsenic for 1 hour, L02 cell line stimulated by arsenic for 6 hours prostate, heart, lung cancer, fetal bladder, fetal small intestine, fetal large intestine, fetal thymus, fetal muscle, fetal liver, fetal kidney, fetal spleen, fetal brain, Fetal lung and fetal heart. Draw a graph based on these 26 Cy3 / Cy5 ratios. (figure 1 ) . It can be seen from the figure that the expression profiles of human ATP-dependent serine proteolytic enzyme 11.3 and human ATP-dependent serine proteolytic enzyme 48 according to the present invention are very similar. Industrial applicability

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 malignant tumors, adrenal deficiency, skin diseases, various inflammations, HIV infections and immune diseases.

Members of the Lon-type proteolytic enzyme family can catalyze ATP-dependent degradation of mitochondrial matrix proteins. Lon The protein family is closely related to the respiration process of organisms in the body, which can maintain the integrity of mitochondrial DNA, but is not a component of the cytochrome complex. Its abnormal expression can cause abnormal mitochondrial DNA structure and affect the function of the respiratory chain, leading to abnormal metabolism of matter and energy.

It can be seen that the abnormal expression of the human ATP-dependent serine proteolytic enzyme of the present invention will produce various diseases, especially mitochondrial diseases, metabolic disorders related to energy and material metabolism, and disorders of growth and development. These diseases include but are not Limited to:

Organic acidemia: isovaleric acidemia, propionic acidemia, methylmalonic aciduria, combined carboxylase deficiency, glutaric acid type I, etc.

Amino acid metabolism defects: phenylketonuria, tyrosine metabolism defects such as albinism, sulfur amino acid metabolism defects, tryptophan metabolism defects such as tryptophanemia, branch amino acid metabolism defects, glycine metabolism defects such as Glycineemia, Hypersarcosineemia, Proline and Hydroxyproline Metabolism Defects, Glutamate Metabolism Defects, Urea Cycle Metabolism Defects, Histidine Metabolism Defects, Lysine Metabolism Defects , And other amino acid metabolism defects.

Mucopolysaccharidosis and other marginal diseases: Mucopolysaccharidosis ι ~ νιι type, Mucopolysaccharidosis marginal diseases such as rheumatoid mucopolysaccharidosis, mucolipid storage disease.

Purine and Pyrimidine Metabolism Defects: Abnormal purine metabolisms such as Ray-niney syndrome, xanthineuria, and abnormal pyrimidine metabolisms such as orotic aciduria and adenosine deaminase deficiency.

Abnormal lipid metabolism: hyperlipoproteinemia, familial hyperalpha-lipoproteinemia, familial non-beta-lipoproteinemia, familial hypo-beta-lipoproteinemia, familial lecithin-cholesterol acetyltransferase Deficiency.

Glucose metabolism defects: Congenital sugar digestion and absorption defects such as congenital lactose intolerance, hereditary fructose intolerance, monosaccharide metabolism defects such as galactosemia, fructose metabolism defects, glycogen metabolism diseases such as glycogen storage Backlog.

Growth and development disorders: mental retardation, cerebral palsy, brain development disorders, familial cerebral nucleus dysplasia syndrome, skin, fat and muscular dysplasias such as congenital skin relaxation, premature aging, congenital horn Malformation, various metabolic defects such as various amino acid metabolic defects, stunting, dwarfism, sexual retardation, etc.

Congenital malformations: spina bifida, craniocerebral fissure, anencephaly malformation, cerebral bulge, foramen malforma, Down syndrome, congenital hydrocephalus, aqueduct malformation, cartilage hypoplasia, dwarfism, spinal epiphyseal dysplasia, Pseudochondral dysplasia, Lange r-G i ed i on syndrome, funnel chest, gonad hypoplasia, congenital adrenal hyperplasia, upper urethral tract, cryptic, with short stature syndromes such as Conrad i syndrome and Danbo l tC l os s syndrome, congenital glaucoma or cataract, congenital lens abnormality, congenital Pleural palpebral fissure, retinal dysplasia, congenital optic atrophy, congenital sensorineural hearing loss, cleft palate, teratosis, Williams syndrome, Alagille syndrome, Bayesian syndrome, etc.

Abnormal expression of the human ATP-dependent serine proteolytic enzyme of the present invention will also generate certain tumors, certain hereditary, hematological diseases, and immune system diseases.

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 mitochondrial disease, metabolic disorders related to energy and material metabolism, and growth and development disorders. Diseases, congenital malformations, certain tumors, certain hereditary, hematological and immune system diseases, etc.

The invention also provides methods for screening compounds to identify agents that increase (agonist) or suppress (antagonist) human ATP-dependent serine proteolytic enzymes 11.3. Agonists enhance human ATP-dependent serine protein hydrolase 11.3 Stimulate biological functions such as cell proliferation, while antagonists prevent and treat disorders related to cell proliferation, such as various cancers. For example, mammalian cells or membrane preparations expressing human ATP-dependent serine protease 11.3 can be cultured with labeled human ATP-dependent serine protease 11.3 in the presence of drugs. The ability of the drug to increase or block this interaction is then determined.

Antagonists of human ATP-dependent serine protease 11.3 include screened antibodies, compounds, receptor deletions, and the like. Antagonists of human ATP-dependent serine protease 11.3 can bind to human ATP-dependent serine protease 11.3 and eliminate its function, or inhibit the production of the polypeptide, or bind to the active site of the polypeptide to make the polypeptide Cannot perform biological functions.

When screening compounds as antagonists, human ATP-dependent serine proteolytic enzymes 11.3 can be added to bioanalytical assays by measuring the effect of compounds on the interaction between human ATP-dependent serine proteolytic enzymes 11.3 and its receptors Determine if 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 ATP-dependent serine proteolytic enzymes 11.3 can be obtained by screening a random peptide library composed of various possible combinations of amino acids bound to a solid phase. When screening, human ATP-dependent serine protein hydrolase 11.3 molecules should generally be labeled.

The present invention provides a method for producing an antibody using a polypeptide, a fragment, a derivative, an analog thereof, or a cell thereof as an antigen. These antibodies can be polyclonal or monoclonal antibodies. The invention also provides antibodies against human ATP-dependent serine proteolytic enzymes 11.3 epitopes. These antibodies include (but are not limited to): polyclonal antibodies, monoclonal antibodies, chimeric antibodies, single chain antibodies, Fab fragments, and fragments produced by Fab expression libraries.

Polyclonal antibodies can be produced by direct injection of human ATP-dependent serine protease 11.3 It can be obtained by various methods (such as rabbit, mouse, rat, 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 to human ATP-dependent serine proteolytic enzymes 11.3 include, but are not limited to, hybridoma technology (Kohler and Milstein. Nature, 1975, 256: 495-497), triple tumor technology, human beta-cell hybridoma technology , EBV-hybridoma technology, etc. Chimeric antibodies combining human constant regions and non-human variable regions can be produced using existing techniques (Morrison et al, PNAS, 1985, 81: 6851). ₀ Existing techniques for producing single-chain antibodies (US Pat No. .4946778) can also be used to produce single chain antibodies against human ATP-dependent serine proteolytic enzymes 11.3.

Antibodies against human ATP-dependent serine proteolytic enzymes 11.3 can be used in immunohistochemical techniques to detect human ATP-dependent serine proteolytic enzymes 11.3 in biopsy specimens.

Monoclonal antibodies that bind to human ATP-dependent serine proteolytic enzyme 11.3 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 that target a particular part of the body. For example, human ATP-dependent serine proteolytic enzymes 11.3 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 through the exchange of disulfide bonds. This hybrid antibody can be used to kill human ATP-dependent serine protease 11.3 Positive cells.

The antibodies of the present invention can be used to treat or prevent diseases related to human ATP-dependent serine protease 11.3. Administration of appropriate doses of antibodies can stimulate or block the production or activity of human ATP-dependent serine protease 11.3.

The invention also relates to a diagnostic test method for the quantitative and localized detection of human ATP-dependent serine proteolytic enzyme 11.3 levels. These tests are well known in the art and include FISH assays and radioimmunoassays. The level of human ATP-dependent serine protease 11.3 detected in the test can be used to explain the importance of human ATP-dependent serine protease 11.3 in various diseases and to diagnose human ATP-dependent serine protease 11.3 A working disease.

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.

The polynucleotide encoding human ATP-dependent serine proteolytic enzyme 11.3 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 ATP-dependent serine protease 11.3. Recombinant gene therapy vectors (such as viral vectors) can be designed to express mutated human ATP-dependent serine protease 11.3 to inhibit internal Human-derived human ATP-dependent serine proteolytic enzyme 11.3 activity. For example, a variant human ATP-dependent serine protease 11.3 may be a shortened human ATP-dependent serine protease 11.3 that lacks a signaling functional domain. Although it can bind to downstream substrates, it lacks signal transduction. active. Therefore, the recombinant gene therapy vector can be used for treating diseases caused by abnormal expression or activity of human ATP-dependent serine protease 11.3. Virus-derived expression vectors such as retrovirus, adenovirus, adenovirus-associated virus, herpes simplex virus, parvovirus, etc. can be used to transfer a polynucleotide encoding human ATP-dependent serine protease 11.3 into a cell. A method for constructing a recombinant viral vector carrying a polynucleotide encoding a human ATP-dependent serine proteolytic enzyme 11.3 can be found in the existing literature (Sanibrook, et al.). In addition, a recombinant polynucleotide encoding human ATP-dependent serine proteolytic enzyme 11.3 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 RNA and DNA) and ribozymes that inhibit human ATP-dependent serine proteolytic enzymes 11.3 mRNA are also within the scope of the present invention. A ribozyme is an enzyme-like NA molecule that can specifically decompose specific RNA. 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 RNA or DNA synthesis technology, 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 a DNA 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 phosphate thioester or peptide bonds instead of phosphodiester bonds.

The polynucleotide encoding human ATP-dependent serine protease 11.3 can be used for the diagnosis of diseases related to human ATP-dependent serine protease 11.3. The polynucleotide encoding human ATP-dependent serine protease 11.3 can be used to detect the expression of human ATP-dependent serine protease 11.3 or the abnormal expression of human ATP-dependent serine protease 11.3 in a disease state. For example, a DNA sequence encoding human ATP-dependent serine protease 11.3 can be used to hybridize biopsy specimens to determine the expression of human ATP-dependent serine protease 11.3. Hybridization techniques include Southern blotting, Northern blotting, in situ hybridization, and the like. These techniques and methods are publicly available and mature, and related kits are commercially available. A part or all of the polynucleotides of the present invention can be used as probes to be fixed on a microarray or a DNA chip (also known as a "gene chip") for analyzing differences in genes in tissues. Expression analysis and genetic diagnosis. Human ATP-dependent serine protease 11.3 specific primers for RNA-polymerase chain reaction (RT-PCR) in vitro amplification can also detect the transcription products of human ATP-dependent serine protease 11.3.

Detection of mutations in the human ATP-dependent serine protease 11.3 gene can also be used to diagnose human ATP-dependent serine protease 11.3-related diseases. Human ATP-dependent serine protease 11.3 Mutations include point mutations, translocations, deletions, recombinations, and any other abnormalities compared to the normal wild-type human ATP-dependent serine proteolytic enzyme II.3 DNA sequence. Mutations can be detected using existing techniques such as Southern imprinting, DNA sequence analysis, PCR and in situ hybridization. In addition, mutations may affect the expression of proteins. Therefore, 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 of a human chromosome and can hybridize with 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 (repeat polymorphisms) are available for labeling chromosomal positions. According to the present invention, in order to associate these sequences with disease-related genes, an important first step is to locate these DNA sequences on a chromosome.

In short, PCR primers (preferably 15-35bp) are prepared based on cDM, and the sequences can be mapped on chromosomes. These primers were then used for PCR screening of somatic hybrid cells containing individual human chromosomes. Only those hybrid cells containing human genes corresponding to the primers 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, by a similar method, 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 pre-selection of hybridization to construct chromosome-specific cDNA libraries.

Fluorescent in situ hybridization (FISH) of cDNA clones to 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 Press, 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, for example, in V. Mckusick, Mendelian Inheritance in Man (available online with Johns Hopkins University Welch 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 differences in cDNA or genomic sequences 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 nodes in the chromosome Structural changes, such as deletions or translocations that are visible at the chromosomal level or detectable with 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 Figure resolution 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 that do not affect the effect of the drug. These compositions can be used as drugs for the treatment of diseases.

The present invention also provides a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the present invention. Along with these containers, there may be instructional instructions given by government agencies that manufacture, use, or sell pharmaceuticals or biological products, which reminders permit their administration on the human body by government agencies that manufacture, use, or sell them. In addition, the polypeptide of the present 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 ATP-dependent serine protease 1 1 .3 is administered in an amount effective to treat and / or prevent a specific indication. The amount and range of human ATP-dependent serine protein hydrolase 1 1.3 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.

Claims

Claim

1. An isolated polypeptide-human ATP-dependent serine proteolytic enzyme III. 3, characterized in that it comprises: a polypeptide having the amino acid sequence shown in SEQ ID NO: 2, or an active fragment, analog, or analog of the polypeptide derivative.

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 the 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) or (b).

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

6. The polynucleotide according to claim 4, characterized in that the sequence of the polynucleotide comprises the sequence of positions 184 to 495 in SEQ ID NO: 1 or the sequence of positions 1-1 to 660 in SEQ ID NO: 1 sequence.

7. A recombination vector containing an exogenous polynucleotide, characterized in that it is a recombination constructed by the polynucleotide according to any one of claims 4-6 and a plasmid, virus or a carrier 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 a polynucleotide according to any one of claims 4-6.

9. A method for preparing a polypeptide having human ATP-dependent serine proteolytic enzyme 1 1.3 activity, characterized in that the method includes:

(a) culturing the engineered host cell according to claim 8 under the condition of expressing human ATP-dependent serine proteolytic enzyme 1 1.3;

(b) Isolating a polypeptide with human ATP-dependent serine proteolytic enzyme 1 1.3 activity from the culture.

10. An antibody capable of binding to a polypeptide, characterized in that the antibody is an antibody capable of specifically binding to human ATP-dependent serine proteolytic enzyme 1 1.3.

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 ATP-dependent serine protease 11.3.

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: 1.

13. The use of the compound according to claim 11, characterized in that the compound is used for regulating human ATP-dependent serine proteolytic enzyme 11.3 method in vivo and in vitro.

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

15. Use of a polypeptide according to any one of claims 1-3, characterized in that it is used for screening mimetics, agonists, antagonists or inhibitors of human ATP-dependent serine proteolytic enzymes 11.3; or For identification of peptide fingerprints.

16. The use of a nucleic acid molecule according to any one of claims 4-6, characterized in that it is used as a primer for a nucleic acid amplification reaction, or as a probe for a hybridization reaction, or for manufacturing 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 the 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 ATP-dependent serine protease 11.3 abnormalities.

18. Use of a polypeptide, polynucleotide or compound according to any one of claims 1-6 and 11, characterized in that said 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.