WO2001075061A2 - Nouveau polypeptide, cdv-1-42, et polynucleotide codant pour ce polypeptide - Google Patents
Nouveau polypeptide, cdv-1-42, et polynucleotide codant pour ce polypeptide Download PDFInfo
- Publication number
- WO2001075061A2 WO2001075061A2 PCT/CN2001/000534 CN0100534W WO0175061A2 WO 2001075061 A2 WO2001075061 A2 WO 2001075061A2 CN 0100534 W CN0100534 W CN 0100534W WO 0175061 A2 WO0175061 A2 WO 0175061A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polypeptide
- cdv
- polynucleotide
- sequence
- seq
- Prior art date
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Classifications
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- 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
Definitions
- CDV-1 gene In the process of further elucidating the pathogenesis and pathophysiology of cardiac hypertrophy in juvenile visceral steatosis mice at the molecular level, biologists discovered a carnitine-deficient gene, the CDV-1 gene.
- the CDV-1 open reading frame starts with ATG of 215 bits and ends with a termination password of 535 bits.
- CDV-1CDNA contains a 521 nucleotide, a 3, untranslated region with the typical polyadenylic acid signal AATAAA.
- the molecular weight of CDV-1 protein is 12578Da. This hydrophilic protein is rich in cysteine, glutamic acid and leucine, and may have a coiled-coiled structure.
- Another object of the invention is to provide a polynucleotide encoding the polypeptide.
- Another object of the present invention is to provide a method for producing CDV-1-42.
- the invention also relates to an isolated polynucleotide comprising a nucleotide sequence or a variant thereof selected from the group consisting of:
- the invention also relates to an antibody capable of specifically binding to a polypeptide of the invention.
- the present invention also relates to the use of the polypeptide and / or polynucleotide of the present invention in the preparation of a medicament for treating cancer, developmental disease or immune disease or other diseases caused by abnormal expression of CDV-1-42.
- “Homology” refers to the degree of complementarity and can be partially homologous or completely homologous.
- Partial homology refers to a partially complementary sequence that at least partially inhibits hybridization of a fully complementary sequence to a target nucleic acid. This inhibition of hybridization can be detected by performing hybridization (Southern imprinting or Nor thern blotting, etc.) under conditions of reduced stringency.
- Substantially homologous sequences or hybridization probes can compete and inhibit the binding of fully homologous sequences to the target sequence under conditions of reduced stringency. This does not mean that conditions with reduced stringency allow non-specific binding, because conditions with reduced stringency require that the two sequences bind to each other as either specific or selective interactions.
- 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 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 CDV-1-42 coding sequence, and a method for producing the polypeptide of the present invention by recombinant technology. .
- the expression vector also includes a ribosome binding site for translation initiation, a transcription terminator, and the like. Insertion of enhancer sequences into the vector will enhance its transcription in higher eukaryotic cells. Enhancers are cis-acting factors expressed by DM, 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 adenoviral 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.
- 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.
- GFP fluorescent protein
- tetracycline or ampicillin resistance for E. coli.
- a polynucleotide encoding CDV-1-4 or a recombinant vector containing the polynucleotide can be transformed or transduced into a host cell to constitute a genetically engineered host cell containing the polynucleotide or the recombinant vector.
- the term "host cell” refers to a prokaryotic cell, such as a bacterial cell; or a lower eukaryotic cell, such as a yeast cell; or a higher eukaryotic cell, such as a mammalian cell. Representative examples are: E.
- coli Streptomyces
- bacterial cells such as Salmonella typhimurium
- fungal cells such as yeast
- plant cells insect cells
- fly S2 or Sf 9 animal cells
- animal cells such as CH0, COS, or Bowes melanoma cells.
- the recombinant polypeptide may be coated in a cell, expressed on a cell membrane, or secreted outside the cell.
- recombinant proteins can be separated 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.
- 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
- Fig. 1 is a comparison diagram of amino acid sequence homology of CDV-1-42 and CDV-1 of the present invention.
- the sequence above is CDV-1-42 and the sequence below is CDV-1.
- 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 the isolated CDV-1-42.
- ⁇ KDa is the molecular weight of the protein.
- the arrow indicates the isolated protein band.
- CMA was synthesized by reverse transcription reaction using fetal brain cell total MA as a template and ol igo-dT as a primer.
- Pr imer2 5'- TACCAAGTTTATTTGCCTTTAAAT -3 '(SEQ ID NO: 4)
- Total MA was extracted in one step [Ana l. Biochem 1987, 162, 156-159].
- This method involves acid guanidinium thiocyanate phenol-chloroform extraction. That is, the tissue is homogenized with 4M guanidine isothiocyanate-25mM sodium citrate, 0.2M sodium acetate (pH4.0), and 1 volume of phenol and 1/5 volume of chloroform-isoamyl alcohol (49: 1), centrifuge after mixing. Aspirate the aqueous layer, add isopropanol (0.8 vol) and centrifuge the mixture to obtain RNA precipitate. The obtained RM precipitate was washed with 70% ethanol, dried and dissolved in water.
- Suitable oligonucleotide fragments selected from the polynucleotides of the present invention are used as hybridization probes in a variety of ways.
- 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.
- 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 sample-immobilized filter is first pre-hybridized with a probe-free hybridization buffer, so that the non-specific binding site of the sample on the filter is saturated with the carrier and the synthetic polymer.
- the pre-hybridization solution is then replaced with a hybridization buffer containing the labeled probe and incubated to hybridize the probe to the target nucleic acid.
- the unhybridized probes are removed by a series of membrane washing steps.
- This embodiment utilizes higher-intensity washing conditions (such as lower salt concentration and higher temperature) 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.
- 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.
- GC content is 30% -703 ⁇ 4, if it exceeds, non-specific hybridization increases;
- 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.
- CDV-1-42 antagonists include antibodies, compounds, receptor deletions, and analogs that have been screened.
- An antagonist of CDV-1-42 can bind to CDV-1-42 and eliminate its function, or inhibit the production of the polypeptide, or bind to the active site of the polypeptide so that the polypeptide cannot perform a biological function.
- 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 hybrid pre-selection to construct chromosome-specific cDM libraries.
- 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 Inherance 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 are mapped to chromosomal regions.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Biophysics (AREA)
- Zoology (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Gastroenterology & Hepatology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Toxicology (AREA)
- Peptides Or Proteins (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001273784A AU2001273784A1 (en) | 2000-03-29 | 2001-03-26 | A novel polypeptide, cdv-1-42 and the polynucleotide encoding the polypeptide |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN00115255.6 | 2000-03-29 | ||
CN 00115255 CN1315338A (zh) | 2000-03-29 | 2000-03-29 | 一种新的多肽——cdv-1-42和编码这种多肽的多核苷酸 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001075061A2 true WO2001075061A2 (fr) | 2001-10-11 |
WO2001075061A3 WO2001075061A3 (fr) | 2002-06-13 |
Family
ID=4584723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2001/000534 WO2001075061A2 (fr) | 2000-03-29 | 2001-03-26 | Nouveau polypeptide, cdv-1-42, et polynucleotide codant pour ce polypeptide |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN1315338A (zh) |
AU (1) | AU2001273784A1 (zh) |
WO (1) | WO2001075061A2 (zh) |
-
2000
- 2000-03-29 CN CN 00115255 patent/CN1315338A/zh active Pending
-
2001
- 2001-03-26 WO PCT/CN2001/000534 patent/WO2001075061A2/zh active Application Filing
- 2001-03-26 AU AU2001273784A patent/AU2001273784A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
FEBS LETT. vol. 408, no. 2, 1997, pages 221 - 224 * |
Also Published As
Publication number | Publication date |
---|---|
AU2001273784A1 (en) | 2001-10-15 |
WO2001075061A3 (fr) | 2002-06-13 |
CN1315338A (zh) | 2001-10-03 |
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