WO2001038380A1 - Nouveau polypeptide, proteine humaine 56 de regulation du noyau cellulaire, et polynucleotide codant pour ce polypeptide - Google Patents
Nouveau polypeptide, proteine humaine 56 de regulation du noyau cellulaire, et polynucleotide codant pour ce polypeptide Download PDFInfo
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- WO2001038380A1 WO2001038380A1 PCT/CN2000/000450 CN0000450W WO0138380A1 WO 2001038380 A1 WO2001038380 A1 WO 2001038380A1 CN 0000450 W CN0000450 W CN 0000450W WO 0138380 A1 WO0138380 A1 WO 0138380A1
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- polypeptide
- polynucleotide
- regulatory protein
- nuclear regulatory
- human nuclear
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4702—Regulators; Modulating activity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention belongs to the field of biotechnology. Specifically, the present invention describes a novel polypeptide, a human cell nuclear regulatory protein 56, and a polynucleotide sequence encoding the polypeptide. The invention also relates to a preparation method and application of the polynucleotide and the polypeptide. Background technique
- the jerky gene cloned in the mouse encodes a 41.7KD protein, which is called the mouse jerky protein.
- Some functions of the jerky protein have been discovered. For example, the insertion of a mutation in the jerky gene of a mouse will cause the inactivation of the jerky gene, which will cause epilepsy syndrome. It also has homology with many mouse nuclear regulatory proteins. Therefore, it is speculated that jerky protein can also bind to DNA to play a regulatory role. (Nat Genet 1995 Sep; 11 (1): 71-5)
- centromere-binding protein-B it is homologous to centromere-binding protein-B, so it is speculated that it can bind to DNA to play a regulatory role.
- Biochem Biophys Res 1997 Jul 18; 236 (2): 389-95 It has been found that different jerky genes are expressed in most human tissues, including brain, liver, lung, spleen, testis and ovary, etc. . In addition, in humans, the jerky gene is dose-sensitive, and even small changes in the expression of the jerky gene can lead to serious results. (J Neurosci 1997 Jun 15; 17 (12): 4562-9)
- epilepsy in humans is obtained genetically.
- the basic role of the jerky gene in the human body can be speculated, but further research is needed to gain a comprehensive understanding of the human jerky gene.
- the functions of the human jerky gene are summarized as follows: (1) Signals that regulate the nervous system, jerky eggs White can cause hyperexcitability and convulsions in the nervous system, mainly regulating the occurrence and onset of epilepsy diseases such as human primary epilepsy and adolescent myoclonus. (2) The expression of the jerky gene also has important regulatory functions on the endocrine system. In endocrine glands such as the pituitary, thyroid, parathyroid, adrenal, islet, gonad, pineal gland, and thymus, due to abnormal expression of the jerky gene, it is possible that Will cause the secretion of the above endocrine glands, resulting in endocrine system disease.
- polypeptide of the present invention was inferred and identified as a new human nuclear regulatory protein 56 (HJP56). Public open
- 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 human nuclear regulatory protein 56.
- Another object of the present invention is to provide a genetically engineered host cell containing a polynucleotide encoding a human nuclear regulatory protein 56.
- Another object of the present invention is to provide a method for producing human nuclear regulatory protein 56.
- Another object of the present invention is to provide an antibody against the polypeptide of the present invention-human nuclear regulatory protein 56.
- Another object of the present invention is to provide mimetic compounds, antagonists, agonists, and inhibitors against the polypeptide of the present invention-human nuclear regulatory protein 56.
- Another object of the present invention is to provide a method for diagnosing and treating diseases associated with abnormalities of human nuclear regulatory protein 56.
- a novel isolated human cell nuclear regulatory protein 56 is provided.
- the polypeptide is of human origin and comprises: a polypeptide having the amino acid sequence of SEQ ID NO: 2, or a conservative variant polypeptide thereof, or Active fragments, or active derivatives or analogs thereof.
- the polypeptide is a polypeptide having the amino acid sequence of SEQ ID NO: 2.
- a polynucleotide encoding the isolated polypeptides is provided, the polynucleotide Comprising a nucleotide sequence that is at least 70% identical to a nucleotide sequence selected from the group consisting of: (a) a polynucleotide encoding the aforementioned human nuclear regulatory protein 56; (b) a The polynucleotide (a) is a complementary polynucleotide.
- the polynucleotide encodes a polypeptide having the amino acid sequence shown in SEQ ID NO: 2.
- sequence of the polynucleotide is one selected from the group consisting of: (a) a sequence having positions 787-2322 in SEQ ID NO: 1; and (b) a sequence having 1-2350 in SEQ ID NO: 1 Sequence of bits.
- 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).
- 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. .
- isolated human nuclear regulatory protein 56 means that human nuclear regulatory protein 56 is essentially free of other proteins, lipids, sugars, or other substances that are naturally associated with it. Those skilled in the art can purify human nuclear regulatory proteins 56 using standard protein purification techniques. Substantially pure polypeptides can produce a single main band on a non-reducing polyacrylamide gel. The purity of the human nuclear regulatory protein 56 peptide can be analyzed by amino acid sequence analysis.
- the present invention provides a new polypeptide, human nuclear regulatory protein 56, which is basically composed 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 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 nuclear regulatory protein 56.
- fragments 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 nuclear regulatory protein 56 of the present invention.
- a fragment, derivative or analog of the polypeptide of the invention may be:
- (I) a type in which one or more amino acid residues are replaced with conservative or non-conservative amino acid residues (preferably conservative amino acid residues), and the substituted amino acid may or may not be encoded by a genetic codon; Or ( ⁇ ) such a type in which a group on one or more amino acid residues is substituted with another group to include a substituent; or (III) such a type in which the mature polypeptide is mixed with another compound (such as elongation Polypeptide half-life compounds, such as polyethylene glycols) fusions; or (IV) one in which additional A polypeptide sequence formed by fusing an amino acid sequence into a mature polypeptide (such as a leader sequence or a secreted sequence or a sequence used to purify this polypeptide or a protein sequence). As described herein, such fragments, derivatives, and analogs are considered to be in the art. Within the knowledge of technical staff.
- the present invention provides an isolated nucleic acid (polynucleotide) consisting essentially 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 cDNA library of human fetal brain tissue. It contains a polynucleotide sequence of 2350 bases in length and its open reading frame (787-2322) encodes 511 amino acids. According to the amino acid sequence homology comparison, it was found that this polypeptide has 35% homology with human jerky protein. It can be deduced that the human nuclear regulatory protein 56 has similar structure and function to human jerky protein.
- the polynucleotide of the present invention may be in the form of DNA or RNA.
- DNA forms include cDNA, genomic DNA, or synthetic DM.
- DM 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.
- 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.
- 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.
- 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.
- "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) A denaturant was added during hybridization, such as 50% (v / v) formamide, 0.1% calf serum / 0.1 ° /.
- hybridizable polynucleotide-encoded polypeptide has the same biological function and activity as the mature polypeptide shown in SEQ ID NO: 2.
- nucleic acid tablets A 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 nucleotides.
- the nucleic acid fragment is also Nucleic acid amplification techniques (such as PCR) can be used to identify and / or isolate polynucleotides encoding human nuclear regulatory protein 56.
- 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 nuclear regulatory protein 56 of the present invention can be obtained by various methods.
- 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.
- 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 developed for mRNA extraction, and kits are also commercially available (Q i agene).
- cDM libraries is also a common method (Sambrook, et al., Molecula Cloning, A Labora tory Manua, Coll d Harbor Labora tory. 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.
- 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-RM hybridization; (2) the presence or absence of marker gene functions; (3) determining the level of transcripts of human nuclear regulatory protein 56; (4) Detection of gene-expressed protein products by immunological techniques or determination of biological activity. The above methods can be used singly or in combination.
- 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.
- the length of the probe is usually within 2000 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).
- immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELI SA) can be used to detect the protein products of human nuclear regulatory protein 56 gene expression.
- ELI SA enzyme-linked immunosorbent assay
- a method for amplifying DM / RNA by using PCR technology is preferably used to obtain the gene of the present invention.
- the RACE method RACE-rapid cDNA end amplification method
- the primers can be appropriately selected based on the polynucleotide sequence information of the present invention disclosed herein, and can be synthesized by conventional methods.
- the amplified DM / RNA fragment can be isolated and purified by conventional methods such as by gel electrophoresis.
- 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 and the like. In order to obtain the full-length cDNA sequence, the 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 genetically engineered using the vector of the present invention or directly using a human nuclear regulatory protein 56 coding sequence, and a method for producing a polypeptide of the present invention by recombinant technology.
- the polynucleotide sequence encoding the human nuclear regulatory protein 56 can be inserted into a vector to constitute a recombinant vector containing the polynucleotide of the present invention.
- 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.
- any plasmid and vector can be used to construct a recombinant expression vector.
- An important feature of expression vectors is that they usually contain origins of replication, promoters, marker genes, and translational regulatory elements.
- DM sequence can be operably linked to an appropriate promoter in an expression vector to guide mRNA synthesis.
- promoters are: the lac or trp promoter of E.
- 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, which act on 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 on the late side of the origin of replication, and adenovirus enhancers.
- 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.
- a polynucleotide encoding human nuclear regulatory protein 56 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 such as fly S2 or Sf 9
- 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.
- 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.
- the alternative is to use MgC l 2 .
- transformation can also be performed by electroporation.
- the following DNA transfection methods can be used: calcium phosphate co-precipitation method, or conventional mechanical methods such as microinjection, electroporation, and liposome packaging.
- polynucleotide sequence of the present invention can be used to express or produce recombinant human nuclear regulatory protein 56 (Science, 1984; 224: 1431). Generally, the following steps are taken:
- 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.
- a suitable method such as temperature conversion or chemical induction
- the recombinant polypeptide may be coated in a cell, expressed on a cell membrane, or secreted outside the cell.
- 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, ion Exchange chromatography, high Performance liquid chromatography (HPLC) and various other liquid chromatography techniques and combinations of these methods. Relationship between diseases.
- the difference in cDNA or genomic sequence between the affected and unaffected individuals needs 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 chromosomes, 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.
- suitable pharmaceutical carrier 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.
- a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the invention.
- 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.
- 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 nuclear regulatory protein 5 6 is administered in an amount effective to treat and / or prevent a specific indication.
- the amount and dose range of human nuclear regulatory protein 56 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. Brief explanation of attached picture
- Fig. 1 is a comparison diagram of the amino acid sequence homology of the human nuclear regulatory protein 56 and the human jerky protein of the present invention.
- the upper sequence is human nuclear regulatory protein 5 6 and the lower sequence is human j erky protein.
- Identical amino acids are represented by single character amino acids between the two sequences, and similar amino acids are represented by "+”.
- Figure 2 shows the polyacrylamide gel electrophoresis (SDS-PAGE) of human nuclear regulatory protein 56 isolated.
- 56kDa is the molecular weight of the protein.
- the arrow indicates the isolated protein band.
- 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 0675A03 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 0675A03 clone contains a full-length cDNA of 2350bp (as shown in Seq ID NO: 1), and has an open reading frame (0RF) from 787bp to 2322b P , which encodes a new protein (such as Seq ID NO: 2).
- This clone pBS-0675A03 was named the protein as human nuclear regulatory protein 56.
- Example 2 Homologous search of cDNA clones
- the sequence of the human nuclear regulatory protein 56 and the encoded protein sequence of the present invention were analyzed using the Blas t program (BasiclocalAlignment search tool) [Altschul, SF et al. J. Mol. Biol. 1990; 215: 403 -10], perform homology search in databases such as Genbank, Swissport, etc.
- the gene with the highest homology to the human nuclear regulatory protein 56 of the present invention is a known human jerky protein, and the accession number encoded by the protein in Genbank is AF004715.
- the protein homology results are shown in Figure 1. The two are highly homologous, with an identity of 35% and a similarity of 51%.
- Example 3 Cloning of a gene encoding human nuclear regulatory protein 56 by RT-PCR
- CDNA was synthesized using fetal brain total RNA as a template and ol igo-dT as a primer for reverse transcription reaction.
- PCR amplification was performed with the following primers:
- Pr imerl 5 '-ACGGTGCTTG ACAATACTATAT-3' (SEQ ID NO: 3)
- Pr imer2 5,-GGAGAAAGCTTCTCTCGGAGTT- 3, (SEQ ID NO: 4)
- Pr imerl is a forward sequence located at the 5th end of bp in SEQ ID NO: 1; Pr imer2 is the 3′-end reverse sequence in SEQ ID NO: 1.
- Amplification reaction conditions 50 ⁇ i of reaction volume containing 50 oi / L KC1, 10 mmol / L Tris-CI, (pH 8. 5), 1.5 ⁇ l / L MgCl 2 , 200 ⁇ mol in a reaction volume of 50 ⁇ 1 / L dNTP, l Opmol primer, 1U of Taq DNA polymerase (C 1 on tech).
- the reaction was performed on a PE 9600 DNA thermal cycler (PerkinElmer) for 25 cycles under the following conditions: 94. C 30sec; 55 ° C 30sec; 72. C 2min.
- ⁇ -act in 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 (Invitrogen) using a TA cloning kit.
- the DNA sequence analysis results showed that the DNA sequence of the PCR product was exactly the same as that of 1-2350bp shown in SEQ ID NO: 1.
- Example 4 Northern blot analysis of human nuclear regulatory protein 56 gene expression:
- RNA extraction in one step [Ana l. Biochem 1987, 162, 156-159] This method involves acid guanidinium thiocyanate phenol-chloroform extraction. 4M guanidinium isothiocyanate-25 mM sodium citrate, 0. 2M sodium acetate (pt 0) homogenize the tissue, add 1 volume of phenol and 1/5 volume of chloroform-isoamyl alcohol (49: 1), mix and centrifuge. Aspirate the aqueous layer and add isopropyl alcohol ( 0.8 volume) and the mixture was centrifuged to obtain a MA precipitate. The obtained A precipitate was washed with 70% ethanol, dried and dissolved in water.
- RNA was used in a solution containing 20 mM 3- (N-morpholino) propanesulfonate. Acid (pH7.0)-5 ⁇ sodium acetate-1mM EDTA-2. 2M formaldehyde on a 1.2% agarose gel for electrophoresis. Then transfer to a nitrocellulose membrane. Random primer method using c- 32 P dATP A 32 P-labeled DNA probe was prepared. The DM probe used was the PCR-encoded human nuclear regulatory protein 56 coding region sequence (787bp to 2322bp) shown in Figure 1.
- the 32P-labeled probe (about 2 x 10 6 cpm / ml) hybridized with RNA-transferred nitrocellulose membrane at 42 ° C overnight in a solution containing 50% formamide-25mM KH 2 P0 4 (pH 7. 4) -5 x SSC-5 x Denhardt's solution and 200 g / ml salmon sperm DNA. After hybridization, the filter was washed in 1 x SSC-0. 1% SDS at 55 ° C for 30 min. Then, it was performed with Phosphor Imager Analysis and quantification Example 5: In vitro expression, isolation and purification of recombinant human nuclear regulatory protein 56
- Pr imer3 5'-CCCCCATGGATGAATAAGAGAGGGAAATATACA-3 '(Seq ID No: 5)
- Pr imer4 5,-CCCGGATCCAACGTTCTCTCGGAGTTCCCGTCT- 3, (Seq ID No: 6)
- the 5 'ends of these two primers contain Ncol and BamHI digestion sites, respectively, followed by the coding sequences of the 5' and 3 'ends of the target gene, respectively.
- the Ncol and BamHI restriction sites correspond to the selective endonuclease sites on the expression vector plasmid pET-28b (+) (Novagen, Cat. No. 69865. 3).
- the pBS-0675A03 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 ⁇ 1 containing 10 pg of pBS-0675A03 plasmid, primers Primer-3 and Primer-4, and another 1 J is lOpmo l, Advantage polymerase Mix (Clontech) 1 ⁇ 1. Cycle parameters: 94 ° C 20s, 60 ° C 30s, 68. C 2 min, a total of 25 cycles. Ncol and BamHI were used to double digest the amplified product and plasmid P ET-28 (+), respectively, and large fragments were recovered and ligated with T4 ligase. The ligated product was transformed with colibacillus DH5o by the calcium chloride method, containing kanamycin
- the cells were collected by centrifugation, and the supernatant was collected by centrifugation. The supernatant was collected by centrifugation. Chromatography was performed using an affinity column 1 ⁇ 8.8 01 Quick Cartridge (product of Novagen) capable of binding to 6 histidines (63 & ⁇ ).
- the purified human nuclear regulatory protein 56 was obtained. After SDS-PAGE electrophoresis, a single band was obtained at 56 kDa ( Figure 2). The band was transferred to a PVDF membrane and the N-terminal amino acid sequence was analyzed by 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.
- the following peptides specific for human nuclear regulatory protein 56 were synthesized using a peptide synthesizer (product of PE): NH 2 -Met-Asn-Lys-Arg-Gly-Lys-Tyr-Thr-Thr-Leu-Asn-Leu-Glu -Glu-Lys-COOH (SEQ ID NO: 7).
- the polypeptide is coupled with hemocyanin and bovine serum albumin to form a complex, respectively.
- hemocyanin and bovine serum albumin for the method, see: Avrameas, et al. Immunochemistry, 1969; 6: 43.
- the polypeptide of the present invention is expressed in most human tissues, including brain, liver, lung, spleen, skeletal muscle, testis, ovary and the like. Due to the dose sensitivity of the polypeptide of the present invention, even small changes in the expression level of jerky protein in the human body can cause abnormal neural signal transmission and hormonal imbalance of endocrine glands, thereby causing diseases of the nervous system and endocrine system.
- polypeptides of the invention are useful in the diagnosis and treatment of many diseases, including nervous system, endocrine system, and some immune system diseases.
- Neurological diseases include: (1) Degenerative diseases of the nervous system: epilepsy, dementia, Parkinson's disease, chorea, depression, amnesia, Huntington's disease, migraine, dementia, multiple sclerosis;
- neurocutaneous syndrome neurofibromatosis, tuberous sclerosis, trigeminal neurohemangioma, ataxia telangiectasia;
- Peripheral nerve disease trigeminal neuralgia, facial paralysis, bulbar palsy, sciatica, Guillain-Barre syndrome.
- Diseases of the endocrine system include: thyroid hormone-releasing hormone, ghrelin, thyrotropin, auxin, epinephrine, norepinephrine and other hormones.
- Diseases of the immune system include: non-reactivity of the immune response, or abnormal immune response, or ineffective host defense.
- the polypeptides and antibodies of the present invention also have effects on damage, defects or disorders of immune tissues, especially for diseases of the hematopoietic system (such as malignant anemia), skin diseases (such as psoriasis), and autoimmune diseases (such as rheumatoid arthritis). ), Radiation diseases and the production and regulation of immune lymphocytes are extremely closely related.
- the invention also provides methods for screening compounds to identify agents that increase (agonist) or suppress (antagonist) human nuclear regulatory protein 56.
- Agonists enhance human nuclear regulatory proteins 56 to stimulate biological functions such as cell proliferation, while antagonists prevent and treat disorders related to excessive cell proliferation, such as various cancers.
- mammalian cells or membrane preparations expressing human nuclear regulatory protein 56 can be cultured with labeled human nuclear regulatory protein 56 in the presence of a drug. The ability of the drug to increase or block this interaction is then measured.
- Antagonists of human nuclear regulatory protein 56 include screened antibodies, compounds, receptor deletions, and the like. Antagonists of human nuclear regulatory protein 56 can bind to human nuclear regulatory protein 56 and eliminate its function, or inhibit the production of the polypeptide, or bind to the active site of the polypeptide such that the polypeptide cannot perform biological functions.
- human nuclear regulatory protein 56 can be added to a bioanalytical assay to determine whether the compound is an antagonist by measuring the effect of the compound on the interaction between human nuclear regulatory protein 56 and its receptor.
- Receptor deletions and analogs that function as antagonists can be screened in the same manner as described above for screening compounds.
- Polypeptide molecules capable of binding to human nuclear regulatory protein 56 can be obtained by screening a random peptide library composed of various possible combinations of amino acids bound to a solid phase. When screening, generally 56 molecules of human nuclear regulatory protein should 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 the human nuclear regulatory protein 56 epitope. These antibodies include (but are not limited to): many Cloned antibodies, monoclonal antibodies, chimeric antibodies, single chain antibodies, Fab fragments, and fragments produced by Fab expression libraries.
- Polyclonal antibodies can be produced by injecting human nuclear regulatory protein 56 directly 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 to human nuclear regulatory protein 56 include, but are not limited to, hybridoma technology (Kohler and Miste in. Nature, 1975, 256: 495-497), triple tumor technology, human beta-cell hybridoma technology, EBV-hybridoma technology, etc. Chimeric antibodies that bind human constant regions to 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 Pa t No. 4946778) can also be used to produce single chain antibodies against human nuclear regulatory protein 56.
- Antibodies against human nuclear regulatory protein 56 can be used in immunohistochemical techniques to detect human nuclear regulatory protein 56 in biopsy specimens.
- Monoclonal antibodies that bind to human nuclear regulatory protein 56 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.
- human nuclear regulatory protein 56 high affinity monoclonal antibodies can covalently bind to bacterial or phytotoxins (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 nuclear regulatory protein 56 positive cells.
- the antibodies of the present invention can be used to treat or prevent diseases associated with human nuclear regulatory protein 56.
- Administration of an appropriate dose of the antibody can stimulate or block the production or activity of human nuclear regulatory protein 56.
- the invention also relates to a diagnostic test method for quantitatively and locally detecting the level of human nuclear regulatory protein 56.
- tests are well known in the art and include FI SH assays and radioimmunoassays.
- the level of human nuclear regulatory protein 56 detected in the test can be used to explain the importance of human nuclear regulatory protein 56 in various diseases and to diagnose diseases in which human nuclear regulatory protein 56 plays a role.
- polypeptide of the present invention can also be used for peptide mapping analysis.
- 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 nuclear regulatory protein 56 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 nuclear regulatory protein 56.
- Recombinant gene therapy vectors (such as viral vectors) can be designed to express mutated human nuclear regulatory protein 56 to inhibit endogenous human nuclear regulatory protein 56 activity.
- a mutated human nuclear regulatory protein 56 may be a shortened human nuclear regulatory protein 56 that lacks a signal transduction domain. Although it can bind to downstream substrates, it lacks signal transduction activity. Therefore, the recombinant gene therapy vector can be used for treating diseases caused by abnormal expression or activity of human nuclear regulatory protein 56.
- Virus-derived expression vectors such as retrovirus, adenovirus, adenovirus-associated virus, herpes simplex virus, parvovirus and the like can be used to transfer a polynucleotide encoding human nuclear regulatory protein 56 into cells.
- a method for constructing a recombinant viral vector carrying a polynucleotide encoding human nuclear regulatory protein 56 can be found in the existing literature (Sambrook, et al.).
- a recombinant polynucleotide encoding human nuclear regulatory protein 56 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.
- a vector such as a virus, phage, or plasmid
- Oligonucleotides including antisense RNA and DM
- ribozymes that inhibit human nuclear regulatory protein 56 mRNA are also within the scope of the present invention.
- a ribozyme is an enzyme-like RNA 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 phosphoramidite chemical synthesis to synthesize oligonucleotides.
- Antisense RNA molecules can be obtained by in vitro or in vivo transcription of DM sequences encoding the RNA.
- This DM sequence has been integrated downstream of the RM polymerase promoter of the vector.
- 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 nuclear regulatory protein 56 can be used for the diagnosis of diseases related to human nuclear regulatory protein 56.
- the polynucleotide encoding human nuclear regulatory protein 56 can be used to detect the expression of human nuclear regulatory protein 56 or the abnormal expression of human nuclear regulatory protein 56 in a disease state.
- the DNA sequence encoding human nuclear regulatory protein 56 can be used to hybridize biopsy specimens to determine the expression of human nuclear regulatory protein 56.
- Hybridization techniques include Southern blotting, Nor thern 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 polynucleotides of the present invention can be used as probes to be fixed on a micro array or a DNA chip (also called a "gene chip") for analyzing differential expression analysis of genes and genetic diagnosis in tissues.
- Human nuclear regulatory protein 56 specific primers for RNA-polymerase chain reaction (RT-PCR) amplification in vitro can also detect human nuclear regulatory protein 56 transcripts.
- Detection of mutations in the human nuclear regulatory protein 56 gene can also be used to diagnose human nuclear regulatory protein 56-related diseases.
- Human nuclear regulatory protein 56 mutations include point mutations, translocations, deletions, recombinations, and any other abnormalities compared to the normal wild-type human nuclear regulatory protein 56 DNA sequence. Available already Some techniques such as Southern blotting, DNA sequence analysis, PCR and in situ hybridization detect mutations. 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.
- the sequence specifically targets a specific position on a human chromosome and can hybridize to it.
- specific sites for each gene on the chromosome need to be identified.
- only a few chromosome markers based on actual sequence data are available for marking chromosome positions.
- an important first step is to locate these DNA sequences on a chromosome.
- PCR primers (preferably 15-35bp) are prepared from the cDNA, and the sequences can be located on the chromosomes. These primers were then used for PCR screening of somatic hybrid cells containing individual human chromosomes. Only those heterozygous cells containing the 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.
- 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 pre-selection of hybridization to construct chromosome-specific cDNA libraries.
- Fluorescent in situ hybridization of cMA clones with metaphase chromosomes allows precise chromosomal localization in one step.
- FISH Fluorescent in situ hybridization
- 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 the Johns Hopkins University Welch Medical Library). Linkage analysis can then be used to determine if genes and genes have been mapped to chromosomal regions
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- Medicinal Chemistry (AREA)
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Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU15096/01A AU1509601A (en) | 1999-11-23 | 2000-11-20 | A novel polypeptide - human cell nucleus regulatory protein 56 and a polynucleotide encoding the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN99124076A CN1296968A (zh) | 1999-11-23 | 1999-11-23 | 一种新的多肽——人细胞核调控蛋白56和编码这种多肽的多核苷酸 |
CN99124076.6 | 1999-11-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001038380A1 true WO2001038380A1 (fr) | 2001-05-31 |
Family
ID=5283169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2000/000450 WO2001038380A1 (fr) | 1999-11-23 | 2000-11-20 | Nouveau polypeptide, proteine humaine 56 de regulation du noyau cellulaire, et polynucleotide codant pour ce polypeptide |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN1296968A (zh) |
AU (1) | AU1509601A (zh) |
WO (1) | WO2001038380A1 (zh) |
-
1999
- 1999-11-23 CN CN99124076A patent/CN1296968A/zh active Pending
-
2000
- 2000-11-20 AU AU15096/01A patent/AU1509601A/en not_active Abandoned
- 2000-11-20 WO PCT/CN2000/000450 patent/WO2001038380A1/zh active Application Filing
Non-Patent Citations (2)
Title |
---|
DONOVAN G.P. ET AL.: "Sensitivity to jerky gene dosage underlies epileptic seizures in mice", J. NEUROSCI., vol. 17, no. 12, 1997, pages 4562 - 4569 * |
MORITA R. ET AL.: "JH8, a gene highly homologous to the mouse jerky gene, maps to the region for childhood absence epilepsy on 8q24", BIOCHEM. BIOPHYS. RES. COMMUN., vol. 248, no. 2, 1998, pages 307 - 314 * |
Also Published As
Publication number | Publication date |
---|---|
CN1296968A (zh) | 2001-05-30 |
AU1509601A (en) | 2001-06-04 |
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