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WO1999036523A1 - Gene semblable a golgi v-snare (gos-28) de rats (cblalg01) - Google Patents

Gene semblable a golgi v-snare (gos-28) de rats (cblalg01) Download PDF

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Publication number
WO1999036523A1
WO1999036523A1 PCT/CN1998/000004 CN9800004W WO9936523A1 WO 1999036523 A1 WO1999036523 A1 WO 1999036523A1 CN 9800004 W CN9800004 W CN 9800004W WO 9936523 A1 WO9936523 A1 WO 9936523A1
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Prior art keywords
polypeptide
cblalgol
seq
nucleotide sequence
polynucleotide
Prior art date
Application number
PCT/CN1998/000004
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English (en)
Inventor
Yu Shen
Bai-Wei Gu
Mao Mao
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Shanghai Second Medical University
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Publication date
Application filed by Shanghai Second Medical University filed Critical Shanghai Second Medical University
Priority to PCT/CN1998/000004 priority Critical patent/WO1999036523A1/fr
Publication of WO1999036523A1 publication Critical patent/WO1999036523A1/fr

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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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides

Definitions

  • This invention relates to newly identified polynucleotides, polypeptides encoded by them and to the use of such polynucleotides and polypeptides, and to their production. More particularly, the polynucleotides and polypeptides of the present invention relate to the transmembrane transporter family, hereinafter referred to as CBLALGOl. The invention also relates to inhibiting or activating the action of such polynucleotides and polypeptides.
  • V-SNARE is a 28kD component of 20S SNARE complex associated with vesicular transport. It participates in ER-Golgi transportation, so it may be important for secretion. This indicates that the transmembrane transporter family has an established, proven history as therapeutic targets. Clearly there is a need for identification and characterization of further members of the transmembrane transporter family which can play a role in preventing, ameliorating or correcting dysfunctions or diseases, including, but not limited to, kidney disease, diabetes mellitus, and cancer.
  • the invention relates to CBLALGOl polypeptides and recombinant materials and methods for their production. Another aspect of the invention relates to methods for using such CBLALGO 1 polypeptides and polynucleotides. Such uses include the treatment of kidney disease, diabetes mellitus, and cancer, among others. In still another aspect, the invention relates to methods to identify agonists and antagonists using the materials provided by the invention, and treating conditions associated with CBLALGOl imbalance with the identified compounds. Yet another aspect of the invention relates to diagnostic assays for detecting diseases associated with inappropriate CBLALGOl activity or levels.
  • CBLALGOl refers, among others, generally to a polypeptide having the amino acid sequence set forth in SEQ ID NO: 2 or an allelic variant thereof.
  • CBLALGOl activity or CBLALGOl polypeptide activity refers to the metabolic or physiologic function of said CBLALGOl including similar activities or improved activities or these activities with decreased undesirable side-effects. Also included are antigenic and immunogenic activities of said CBLALGOl.
  • CBLALGOl gene refers to a polynucleotide having the nucleotide sequence set forth in SEQ
  • Antibodies as used herein includes polyclonal and monoclonal antibodies, chimeric, single chain, and humanized antibodies, as well as Fab fragments, including the products of an Fab or other immunoglobulin expression library.
  • isolated means altered “by the hand of man” from the natural state. If an “isolated” composition or substance occurs in nature, it has been changed or removed from its original environment, or both. For example, a polynucleotide or a polypeptide naturally present in a living animal is not “isolated,” but the same polynucleotide or polypeptide separated from the coexisting materials of its natural state is “isolated", as the term is employed herein.
  • Polynucleotide generally refers to any polyribonucleotide or polydeoxribonucleotide, which may be unmodified RNA or DNA or modified RNA or DNA.
  • Polynucleotides include, without limitation single- and double-stranded DNA, DNA that is a mixture of single- and double-stranded regions, single- and double-stranded RNA, and RNA that is mixture of single- and double-stranded regions, hybrid molecules comprising DNA and RNA that may be single-stranded or, more typically, double-stranded or a mixture of single- and double-stranded regions.
  • polynucleotide refers to triple-stranded regions comprising RNA or DNA or both RNA and DNA.
  • the term polynucleotide also includes DNAs or RNAs containing one or more modified bases and DNAs or RNAs with backbones modified for stability or for other reasons.
  • Modified bases include, for example, tritylated bases and unusual bases such as inosine.
  • polynucleotide embraces chemically, enzymatically or metabolically modified forms of polynucleotides as typically found in nature, as well as the chemical forms of DNA and RNA characteristic of viruses and cells.
  • Polynucleotide also embraces relatively short polynucleotides, often referred to as oligonucleotides.
  • Polypeptide refers to any peptide or protein comprising two or more amino acids joined to each other by peptide bonds or modified peptide bonds, i.e., peptide isosteres.
  • Polypeptide refers to both short chains, commonly referred to as peptides, oligopeptides or oligomers, and to longer chains, generally referred to as proteins. Polypeptides may contain amino acids other than the 20 gene-encoded amino acids.
  • Polypeptides include amino acid sequences modified either by natural processes, such as posttranslational processing, or by chemical modification techniques which are well known in the art. Such modifications are well described in basic texts and in more detailed monographs, as well as in a voluminous research literature.
  • Modifications can occur anywhere in a polypeptide, including the peptide backbone, the amino acid side-chains and the amino or carboxyl termini. It will be appreciated that the same type of modification may be present in the same or varying degrees at several sites in a given polypeptide. Also, a given polypeptide may contain many types of modifications. Polypeptides may be branched as a result of ubiquitination, and they may be cyclic, with or without branching. Cyclic, branched and branched cyclic polypeptides may result from posttranslation natural processes or may be made by synthetic methods.
  • Modifications include acetylation, acylation, ADP-ribosylation, amidation, covalent attachment of flavin, covalent attachment of a heme moiety, covalent attachment of a nucleotide or nucleotide derivative, covalent attachment of a lipid or lipid derivative, covalent attachment of phosphotidylinositol, cross-linking, cyclization, disulfide bond formation, demethylation, formation of covalent cross-links, formation of cystine, formation of pyroglutamate, formylation, gamma-carboxylation, glycosylation, GPI anchor formation, hydroxylation, iodination, methylation, myristoylation, oxidation, proteolytic processing, phosphorylation, prenylation, racemization, selenoylation, sulfation, transfer-RNA mediated addition of amino acids to proteins such as arginylation, and ubiquitination.
  • Variant is a polynucleotide or polypeptide that differs from a reference polynucleotide or polypeptide respectively, but retains essential properties.
  • a typical variant of a polynucleotide differs in nucleotide sequence from another, reference polynucleotide. Changes in the nucleotide sequence of the variant may or may not alter the amino acid sequence of a polypeptide encoded by the reference polynucleotide. Nucleotide changes may result in amino acid substitutions, additions, deletions, fusions and truncations in the polypeptide encoded by the reference sequence, as discussed below.
  • a typical variant of a polypeptide differs in amino acid sequence from another, reference polypeptide. Generally, differences are limited so that the sequences of the reference polypeptide and the variant are closely similar overall and, in many regions, identical.
  • a variant and reference polypeptide may differ in amino acid sequence by one or more substitutions, additions, deletions in any combination.
  • a substituted or inserted amino acid residue may or may not be one encoded by the genetic code.
  • a variant of a polynucleotide or polypeptide may be a naturally occurring such as an allelic variant, or it may be a variant that is not known to occur naturally. Non-naturally occurring variants of polynucleotides and polypeptides may be made by mutagenesis techniques or by direct synthesis.
  • Identity is a measure of the identity of nucleotide sequences or amino acid sequences. In general, the sequences are aligned so that the highest order match is obtained. "Identity” per se has an art-recognized meaning and can be calculated using published techniques. See, e.g.: (COMPUTATIONAL MOLECULAR BIOLOGY, Lesk, A.M., ed, Oxford University Press, New York, 1988; BIOCOMPUTING: INFORMATICS AND GENOME PROJECTS, Smith, D.W, ed.
  • Methods commonly employed to determine identity or similarity between two sequences include, but are not limited to, those disclosed in Guide to Huge Computers, Martin J. Bishop, ed. Academic Press, San Diego, 1994, and Carillo, H, and Lipton, D, SIAM J Applied Math (1988) 48: 1073. Methods to determine identity and similarity are codified in computer programs. Preferred computer program methods to determine identity and similarity between two sequences include, but are not limited to, GCS program package (Devereux, J., et al, Nucleic Acids Research (1984) 12(1):387), BLASTP, BLASTN, FASTA (Atschul, S.F. et al. , J Molec Biol (1990) 215:403).
  • a polynucleotide having a nucleotide sequence having at least, for example, 95% "identity" to a reference nucleotide sequence of SEQ ID NO: 1 is intended that the nucleotide sequence of the polynucleotide is identical to the reference sequence except that the polynucleotide sequence may include up to five point mutations per each 100 nucleotides of the reference nucleotide sequence of SEQ ID NO: 1.
  • a polynucleotide having a nucleotide sequence at least 95% identical to a reference nucleotide sequence up to 5% of the nucleotides in the reference sequence may be deleted or substituted with another nucleotide, or a number of nucleotides up to 5% of the total nucleotides in the reference sequence may be inserted into the reference sequence.
  • These mutations of the reference sequence may occur at the 5 or 3 terminal positions of the reference nucleotide sequence or anywhere between those terminal positions, interspersed either individually among nucleotides in the reference sequence or in one or more contiguous groups within the reference sequence.
  • a polypeptide having an amino acid sequence having at least, for example, 95% "identity" to a reference amino acid sequence of SEQ ID NO:2 is intended that the amino acid sequence of the polypeptide is identical to the reference sequence except that the polypeptide sequence may include up to five amino acid alterations per each 100 amino acids of the reference amino acid of SEQ ID NO: 2.
  • up to 5% of the amino acid residues in the reference sequence may be deleted or substituted with another amino acid, or a number of amino acids up to 5% of the total amino acid residues in the reference sequence may be inserted into the reference sequence.
  • These alterations of the reference sequence may occur at the amino or carboxy terminal positions of the reference amino acid sequence or anywhere between those terminal positions, interspersed either individually among residues in the reference sequence or in one or more contiguous groups within the reference sequence.
  • the present invention relates to CBLALGOl polypeptides (or CBLALGOl proteins).
  • the CBLALGOl polypeptides include the polypeptide of SEQ ID NO:2; as well as polypeptides comprising the amino acid sequence of SEQ ID NO: 2; and polypeptides comprising the amino acid sequence which have at least 80% identity to that of SEQ ID NO:2 over its entire length, and still more preferably at least 90% identity, and even still more preferably at least 95% identity to SEQ ID NO: 2. Furthermore, those with at least 97-99% are highly preferred.
  • CBLALGOl polypeptides having the amino acid sequence which have at least 80% identity to the polypeptide having the amino acid sequence of SEQ ID NO:2 over its entire length, and still more preferably at least 90% identity, and still more preferably at least 95% identity to SEQ ID NO:2. Furthermore, those with at least 97-99% are highly preferred.
  • CBLALGOl polypeptide exhibit at least one biological activity of CBLALGO 1.
  • the CBLALGOl polypeptides may be in the form of the "mature" protein or may be a part of a larger protein such as a fusion protein. It is often advantageous to include an additional amino acid sequence which contains secretory or leader sequences, pro-sequences, sequences which aid in purification such as multiple histidine residues, or an additional sequence for stability during recombinant production.
  • a fragment is a polypeptide having an amino acid sequence that entirely is the same as part, but not all, of the amino acid sequence of the aforementioned CBLALGOl polypeptides.
  • fragments may be "free-standing," or comprised within a larger polypeptide of which they form a part or region, most preferably as a single continuous region.
  • Representative examples of polypeptide fragments of the invention include, for example, fragments from about amino acid number 1-20, 21-40, 41-60, 61-80, 81-100, and 101 to the end of CBLALGOl polypeptide. In this context "about” includes the particularly recited ranges larger or smaller by several, 5, 4, 3, 2 or 1 amino acid at either extreme or at both extremes.
  • Preferred fragments include, for example, truncation polypeptides having the amino acid sequence of
  • CBLALGOl polypeptides except for deletion of a continuous series of residues that includes the amino terminus, or a continuous series of residues that includes the carboxyl terminus or deletion of two continuous series of residues, one including the amino terminus and one including the carboxyl terminus.
  • fragments characterized by structural or functional attributes such as fragments that comprise alpha-helix and alpha-helix forming regions, beta-sheet and beta-sheet-forming regions, turn and tum-forming regions, coil and coil-forming regions, hydrophilic regions, hydrophobic regions, alpha amphipathic regions, beta amphipathic regions, flexible regions, surface-forming regions, substrate binding region, and high antigenic index regions.
  • Other preferred fragments are biologically active fragments. Biologically active fragments are those that mediate CBLALGOl activity, including those with a similar activity or an improved activity, or with a decreased undesirable activity. Also included are those that are antigenic or immunogenic in an animal, especially in a human.
  • variants are those that vary from the referents by conservative amino acid substitutions - i.e., those that substitute a residue with another of like ch-iracteristics. Typical such substitutions are among Ala, Val, Leu and lie; among Ser and Thr; among the acidic residues Asp and Glu; among Asn and Gin; and among the basic residues Lys and Arg; or aromatic residues Phe and Tyr. Particularly preferred are variants in which several, 5-10, 1-5, or 1-2 amino acids are substituted, deleted, or added in any combination.
  • the CBLALGO 1 polypeptides of the invention can be prepared in any suitable manner.
  • Such polypeptides include isolated naturally occurring polypeptides, recombinantly produced polypeptides, synthetically produced polypeptides, or polypeptides produced by a combination of these methods. Means for preparing such polypeptides are well understood in the art.
  • CBLALGOl polynucleotides include isolated polynucleotides which encode the CBLALGOl polypeptides and fragments, and polynucleotides closely related thereto. More specifically, CBLALGOl polynucleotide of the invention include a polynucleotide comprising the nucleotide sequence contained in SEQ ID NO: 1 encoding a CBLALGOl polypeptide of SEQ ID NO: 2, and polynucleotide having the particular sequence of SEQ ID NO: 1.
  • CBLALGOl polynucleotides further include a polynucleotide comprising a nucleotide sequence that has at least 80% identity over its entire length to a nucleotide sequence encoding the CBLALGOl polypeptide of SEQ ID NO:2, and a polynucleotide comprising a nucleotide sequence that is at least 80% identical to of SEQ ID NO: 1 over its entire length.
  • polynucleotides at least 90% identical are particularly preferred, and those with at least 95% are especially preferred.
  • those with at least 97% are highly preferred and those with at least 98-99% are most highly preferred, with at least 99% being the most preferred.
  • CBLALGOl polynucleotides are also included under CBLALGOl polynucleotides.
  • a nucleotide sequence which has sufficient identity to a nucleotide sequence contained in SEQ ID NO: 1 to hybridize under conditions useable for amplification or for use as a probe or marker.
  • the invention also provides polynucleotides which are complementary to such CBLALGOl polynucleotides.
  • CBLALGOl of the invention is structurally related to other proteins of the transmembrane transporter family, as shown by the results of sequencing the cDNA of Table 1 (SEQ ID NO: 1) encoding human CBLALGOl .
  • the cDNA sequence of SEQ ID NO: 1 contains an open reading frame (nucleotide number 12 to 776) encoding a polypeptide of 255 amino acids of SEQ ID NO:2.
  • the amino acid sequence of Table 2 (SEQ ID NO:2) has about 94% identity (using FASTA) in 255 amino acid residues with rat Golgi v-SNARE (GOS 28) ( M Nagahama, et al,J. Cell Biol, 133:507-516,1996).
  • CBLALGOl (SEQ ID NO:2) is about 94% identical over 255 amino acid residues to cis-Golgi p28 (p28) (VN Subramaniam, et al,Science, 272: 1161-1163, 1996).
  • the nucleotide sequence of Table 1 (SEQ ID NO: 1) has about 89.4% identity (using FASTA) in 799 nucleotide residues with rat Golgi v-SNARE (GOS 28)( M Nagahama, et al,J. Cell Biol, 133:507-516,1996).
  • CBLALGOl (SEQ JX> NO:l) is 86.1% identical over 798 nucleotides to cis-Golgi p28 (p28) (VN Subramaniam, et al,Science, 272: 1161- 1163, 1996).
  • CBLALGOl polypeptides and polynucleotides of the present invention are expected to have, inter alia, similar biological functions/properties to their homologous polypeptides and polynucleotides, and their utility is obvious to anyone skilled in the art. Table 1'
  • a nucleotide sequence of a human CBLALGOl (SEQ ID NO: 1).
  • One polynucleotide of the present invention encoding CBLALGOl may be obtained using standard cloning and screening, from a cDNA library derived from mRNA in cells of human cord blood using the expressed sequence tag (EST) analysis (Adams, M.D, et al. Science (1991) 252:1651-1656; Adams, M.D. et al, Nature, (1992) 355:632-634; Adams, M.D, et al, Nature (1995) 377 Supp:3-174).
  • Polynucleotides of the invention can also be obtained from natural sources such as genomic DNA libraries or can be synthesized using well known and commercially available techniques.
  • nucleotide sequence encoding CBLALGOl polypeptide of SEQ ID NO:2 may be identical to the polypeptide encoding sequence contained in Table 1 (nucleotide number 12 to 776 of SEQ ID NO:2).
  • the polynucleotide may include the coding sequence for the mature polypeptide or a fragment thereof, by itself; the coding sequence for the mature polypeptide or fragment in reading frame with other coding sequences, such as those encoding a leader or secretory sequence, a pre-, or pro- or prepro- protein sequence, or other fusion peptide portions.
  • a marker sequence which facilitates purification of the fused polypeptide can be encoded.
  • the marker sequence is a hexa-histidine peptide, as provided in the pQE vector (Qiagen, Inc.) and described in Gentz et al, Proc Natl Acad Sci USA (1989) 86:821-824, or is an HA tag.
  • the polynucleotide may also contain non-coding 5' and 3' sequences, such as transcribed, non-translated sequences, splicing and polyadenylation signals, ribosome binding sites and sequences that stabilize mRNA.
  • polynucleotides encoding CBLALGOl variants comprise the amino acid sequence CBLALGOl polypeptide of Table 2 (SEQ ID NO:2) in which several, 5-10, 1-5, 1-3, 1-2 or 1 amino acid residues are substituted, deleted or added, in any combination.
  • the present invention further relates to polynucleotides that hybridize to the herein above-described sequences.
  • the present invention especially relates to polynucleotides which hybridize under stringent conditions to the herein above-described polynucleotides.
  • stringent conditions means hybridization will occur only if there is at least 80%, and preferably at least 90%, and more preferably at least 95%, yet even more preferably 97-99% identity between the sequences.
  • Polynucleotides of the invention which are identical or sufficiently identical to a nucleotide sequence contained in SEQ ID NO: 1 or a fragment thereof, may be used as hybridization probes for cDNA and genomic DNA, to isolate full-length cDNAs and genomic clones encoding CBLALGOl polypeptide and to isolate cDNA and genomic clones of other genes (including genes encoding homologs and orthologs from species other than human) that have a high sequence similarity to the CBLALGO 1 gene.
  • Such hybridization techniques are known to those of skill in the art.
  • these nucleotide sequences are 80% identical, preferably 90% identical, more preferably 95% identical to that of the referent.
  • the probes generally will comprise at least 15 nucleotides. Preferably, such probes will have at least 30 nucleotides and may have at least 50 nucleotides. Particularly preferred probes will range between 30 and 50 nucleotides.
  • to obtain a polynucleotide encoding CBLALGO 1 polypeptide, including homologs and orthologs from species other than human comprises the steps of screening an appropriate library under stingent hybridization conditions with a labeled probe having the SEQ ID NO: 1 or a fragment thereof; and isolating full-length cDNA and genomic clones containing said polynucleotide sequence.
  • CBLALGOl polynucleotides of the present invention further include a nucleotide sequence comprising a nucleotide sequence that hybridize under stringent condition to a nucleotide sequence having SEQ ID NO: 1 or a fragment thereof. Also included with CBLALGOl polypeptides are polypeptide comprising amino acid sequence encoded by nucleotide sequence obtained by the above hybridization condition. Such hybridization techniques are well known to those of skill in the art.
  • Stringent hybridization conditions are as defined above or, alternatively, conditions under overnight incubation at 42°C in a solution comprising: 50% formamide, 5xSSC (150mM NaCl, 15mM trisodium citrate), 50 mM sodium phosphate (pH7.6), 5x Denhardt's solution, 10 % dextran sulfate, and 20 microgram/ml denatured, sheared salmon sperm DNA, followed by washing the filters in 0. lx SSC at about 65°C.
  • 5xSSC 150mM NaCl, 15mM trisodium citrate
  • 50 mM sodium phosphate pH7.6
  • 5x Denhardt's solution 10 % dextran sulfate
  • 20 microgram/ml denatured, sheared salmon sperm DNA followed by washing the filters in 0. lx SSC at about 65°C.
  • polynucleotides and polypeptides of the present invention may be employed as research reagents and materials for discovery of treatments and diagnostics to animal and human disease.
  • the present invention also relates to vectors which comprise a polynucleotide or polynucleotides of the present invention, and host cells which are genetically engineered with vectors of the invention and to the production of polypeptides of the invention by recombinant techniques.
  • Cell-free translation systems can also be employed to produce such proteins using RNAs derived from the DNA constructs of the present invention.
  • host cells can be genetically engineered to incorporate expression systems or portions thereof for polynucleotides of the present invention.
  • Introduction of polynucleotides into host cells can be effected by methods described in many standard laboratory manuals, such as Davis et al, BASIC METHODS IN MOLECULAR BIOLOGY (1986) and Sambrook et al, MOLECULAR CLONING: A LABORATORY MANUAL, 2nd Ed, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY. (1989) such as calcium phosphate transfection, DEAE-dextran mediated transfection, transvection, microinjection, cationic lipid-mediated transfection, electroporation, transduction, scrape loading, ballistic introduction or infection.
  • bacterial cells such as streptococci, staphylococci, E. coli, Streptomyces and Bacillus subtilis cells
  • fungal cells such as yeast cells and Aspergillus cells
  • insect cells such as Drosophila S2 and Spodoptera Sf9 cells
  • animal cells such as CHO, COS, HeLa, C127, 3T3, BHK, HEK 293 and Bowes melanoma cells
  • plant cells include bacterial cells, such as streptococci, staphylococci, E. coli, Streptomyces and Bacillus subtilis cells
  • fungal cells such as yeast cells and Aspergillus cells
  • insect cells such as Drosophila S2 and Spodoptera Sf9 cells
  • animal cells such as CHO, COS, HeLa, C127, 3T3, BHK, HEK 293 and Bowes melanoma cells
  • Such systems include, among others, chromosomal, episomal and virus-derived systems, e.g., vectors derived from bacterial plasmids, from bacteriophage, from transposons, from yeast episomes, from insertion elements, from yeast chromosomal elements, from viruses such as baculoviruses, papova viruses, such as SV40, vaccinia viruses, adenoviruses, fowl pox viruses, pseudorabies viruses and retroviruses, and vectors derived from combinations thereof, such as those derived from plasmid and bacteriophage genetic elements, such as cosmids and phagemids.
  • viruses such as baculoviruses, papova viruses, such as SV40, vaccinia viruses, adenoviruses, fowl pox viruses, pseudorabies viruses and retroviruses
  • vectors derived from combinations thereof such as those derived from plasmid and bacteriophage genetic elements, such as cosmid
  • the expression systems may contain control regions that regulate as well as engender expression.
  • any system or vector suitable to maintain, propagate or express polynucleotides to produce a polypeptide in a host may be used.
  • the appropriate nucleotide sequence may be inserted into an expression system by any of a variety of well-known and routine techniques, such as, for example, those set forth in Sambrook et al., MOLECULAR CLONING, A LABORATORY MANUAL ⁇ supra).
  • appropriate secretion signals may be incorporated into the desired polypeptide.
  • These signals may be endogenous to the polypeptide or they may be heterologous signals.
  • the CBLALGOl polypeptide is to be expressed for use in screening assays, generally, it is preferred that the polypeptide be produced at the surface of the cell. In this event, the cells may be harvested prior to use in the screening assay. If CBLALGOl polypeptide is secreted into the medium, the medium can be recovered in order to recover and purify the polypeptide; if produced intracellularly, the cells must first be lysed before the polypeptide is recovered.
  • CBLALGOl polypeptides can be recovered and purified from recombinant cell cultures by well-known methods including ammonium sulfate or ethanol precipitation, acid extraction, anion or cation exchange chromatography, phosphocellulose chromatography, hydrophobic interaction chromatography, affinity chromatography, hydroxylapatite chromatography and lectin chromatography. Most preferably, high performance liquid chromatography is employed for purification. Well known techniques for refolding proteins may be employed to regenerate active conformation when the polypeptide is denatured during isolation and or purification.
  • This invention also relates to the use of CBLALGOl polynucleotides for use as diagnostic reagents.
  • Detection of a mutated form of CBLALGOl gene associated with a dysfunction will provide a diagnostic tool that can add to or define a diagnosis of a disease or susceptibility to a disease which results from under- expression, over-expression or altered expression of CBLALGOl .
  • Individuals carrying mutations in the CBLALGOl gene may be detected at the DNA level by a variety of techniques. Nucleic acids for diagnosis may be obtained from a subject's cells, such as from blood, urine, saliva, tissue biopsy or autopsy material. The genomic DNA may be used directly for detection or may be amplified enzymatically by using PCR or other amplification techniques prior to analysis. RNA or cDNA may also be used in similar fashion.
  • Deletions and insertions can be detected by a change in size of the amplified product in comparison to the normal genotype.
  • Point mutations can be identified by hybridizing amplified DNA to labeled CBLALGOl nucleotide sequences. Perfectly matched sequences can be distinguished from mismatched duplexes by RNase digestion or by differences in melting temperatures. DNA sequence differences may also be detected by alterations in electrophoretic mobility of DNA fragments in gels, with or without denaturing agents, or by direct DNA sequencing. See, e.g., Myers et al. , Science (1985) 230: 1242. Sequence changes at specific locations may also be revealed by nuclease protection assays, such as RNase and SI protection or the chemical cleavage method.
  • an array of oligonucleotides probes comprising CBLALGOl nucleotide sequence or fragments thereof can be constructed to conduct efficient screening of e.g., genetic mutations.
  • Array technology methods are well known and have general applicability and can be used to address a variety of questions in molecular genetics including gene expression, genetic linkage, and genetic variability. (See for example: M.Chee et al. Science, Vol 274, pp 610-613 (1996)).
  • the diagnostic assays offer a process for diagnosing or determining a susceptibility to kidney disease, diabetes mellitus, and cancer through detection of mutation in the CBLALGOl gene by the methods described.
  • kidney disease, diabetes mellitus, and cancer can be diagnosed by methods comprising determining from a sample derived from a subject an abnormally decreased or increased level of CBLALGOl polypeptide or CBLALGOl mRNA. Decreased or increased expression can be measured at the RNA level using any of the methods well known in the art for the quantitation of polynucleotides, such as, for example, PCR, RT-PCR, RNase protection, Northern blotting and other hybridization methods.
  • Assay techniques that can be used to determine levels of a protein, such as an CBLALGOl polypeptide, in a sample derived from a host are well-known to those of skill in the art. Such assay methods include radioimmunoassays, competitive-binding assays, Western Blot analysis and ELISA assays.
  • the present invention relates to a diagonostic kit for a disease or suspectability to a disease, particularly kidney disease, diabetes mellitus, and cancer, which comprises:
  • a CBLALGOl polynucleotide preferably the nucleotide sequence of SEQ ID NO: 1, or a fragment thereof ;
  • a CBLALGOl polypeptide preferably the polypeptide of SEQ ID NO: 2, or a fragment thereof; or (d) an antibody to a CBLALGOl polypeptide, preferably to the polypeptide of SEQ ID NO: 2.
  • kits may comprise a substantial component.
  • the nucleotide sequences of the present invention are also valuable for chromosome identification.
  • the sequence is specifically targeted to and can hybridize with a particular location on an individual human chromosome.
  • the mapping of relevant sequences to chromosomes according to the present invention is an important first step in correlating those sequences with gene associated disease. Once a sequence has been mapped to a precise chromosomal location, the physical position of the sequence on the chromosome can be correlated with genetic map data. Such data are found, for example, in V. McKusick, Mendelian Inheritance in Man (available on line through Johns Hopkins University Welch Medical Library).
  • genes and diseases that have been mapped to the same chromosomal region are then identified through linkage analysis ( ⁇ inheritance of physically adjacent genes).
  • linkage analysis ⁇ inheritance of physically adjacent genes.
  • the differences in the cDNA or genomic sequence between affected and unaffected individuals can also be determined. If a mutation is observed in some or all of the affected individuals but not in any normal individuals, then the mutation is likely to be the causative agent of the disease.
  • the polypeptides of the invention or their fragments or analogs thereof, or cells expressing them can also be used as immunogens to produce antibodies immunospecific for the CBLALG l polypeptides.
  • immunospecific means that the antibodies have substantiall greater affinity for the polypeptides of the invention than their affinity for other related polypeptides in the prior art.
  • Antibodies generated against the CBLALGO 1 polypeptides can be obtained by administering the polypeptides or epitope-bearing fragments, analogs or cells to an animal, preferably a nonhuman. using routine protocols.
  • any technique which provides antibodies produced by continuous cell line cultures can be used. Examples include the hybridoma technique (Kohler, G.
  • Antibodies against CBLALGOl polypeptides may also be employed to treat kidney disease, diabetes mellitus, and cancer, among others.
  • Another aspect of the invention relates to a method for inducing an immunological response in a mammal which comprises inoculating the mammal with CBLALGOl polypeptide, or a fragment thereof, adequate to produce antibody and/or T cell immune response to protect said animal from kidney disease, diabetes mellitus, and cancer, among others.
  • Yet another aspect of the invention relates to a method of inducing immunological response in a mammal which comprises, delivering CBLALGOl polypeptide via a vector directing expression of CBLALGOl polynucleotide in vivo in order to induce such an immunological response to produce antibody to protect said animal from diseases.
  • composition which, when introduced into a mammalian host, induces an immunological response in that mammal to a CBLALGOl polypeptide wherein the composition comprises a CBLALGOl polypeptide or CBLALGOl gene.
  • the vaccine formulation may further comprise a suitable carrier. Since CBLALGOl polypeptide may be broken down in the stomach, it is preferably administered parenterally (including subcutaneous, intramuscular, intravenous, intradermal etc. injection).
  • Formulations suitable for parenteral administration include aqueous and non-aqueous sterile injection solutions which may contain anti-oxidants, buffers, bacteriostats and solutes which render the formulation instonic with the blood of the recipient; and aqueous and non-aqueous sterile suspensions which may include suspending agents or thickening agents.
  • the formulations may be presented in unit-dose or multi-dose containers, for example, sealed ampoules and vials and may be stored in a freeze-dried condition requiring only the addition of the sterile liquid carrier immediately prior to use.
  • the vaccine formulation may also include adjuvant systems for enhancing the immunogenicity of the formulation, such as oil-in water systems and other systems known in the art. The dosage will depend on the specific activity of the vaccine and can be readily determined by routine experimentation.
  • the CBLALGOl polypeptide of the present invention may be employed in a screening process for compounds which activate (agonists) or inhibit activation of (antagonists, or otherwise called inhibitors) the CBLALGOl polypeptide of the present invention.
  • polypeptides of the invention may also be used to assess identify agonist or antagonists from, for example, cells, cell-free preparations, chemical libraries, and natural product mixtures.
  • agonists or antagonists may be natural or modified substrates, hgands, receptors, enzymes, etc, as the case may be, of the polypeptide of the present invention; or may be structural or functional mimetics of the polypeptide of the present invention. See Coligan et al.
  • CBLALGOl polypeptides are responsible for many biological functions, including many pathologies. Accordingly, it is desirous to find compounds and drugs which stimulate CBLALGO 1 polypeptide on the one hand and which can inhibit the function of CBLALGO 1 polypeptide on the other hand.
  • agonists are employed for therapeutic and prophylactic purposes for such conditions as kidney disease, diabetes mellitus, and cancer.
  • Antagonists may be employed for a variety of therapeutic and prophylactic purposes for such conditions as kidney disease, diabetes mellitus, and cancer.
  • screening procedures may involve using appropriate cells which express the
  • CBLALGOl polypeptide or respond to CBLALGOl polypeptide of the present invention include cells from mammals, yeast, Drosophila or E. coli. Cells which express the CBLALGOl polypeptide (or cell membrane containing the expressed polypeptide) or respond to CBLALGOl polypeptide are then contacted with a test compound to observe binding, or stimulation or inhibition of a functional response. The ability of the cells which were contacted with the candidate compounds is compared with the same cells which were not contacted for CBLALGOl activity.
  • the assays may simply test binding of a candidate compound wherein adherence to the cells bearing the CBLALGO 1 polypeptide is detected by means of a label directly or indirectly associated with the candidate compound or in an assay involving competition with a labeled competitor. Further, these assays may test whether the candidate compound results in a signal generated by activation of the CBLALGOl polypeptide, using detection systems appropriate to the cells bearing the CBLALGOl polypeptide. Inhibitors of activation are generally assayed in the presence of a known agonist and the effect on activation by the agonist by the presence of the candidate compound is observed.
  • the assays may simply comprise the steps of mixing a candidate compound with a solution containing a CBLALGOl polypeptide to form a mixture, measuring CBLALGOl activity in the mixture, and comparing the CBLALGOl activity of the mixture to a standard.
  • the CBLALGOl cDNA, protein and antibodies to the protein may also be used to configure assays for detecting the effect of added compounds on the production of CBLALGOl mRNA and protein in cells.
  • an ELISA may be constructed for measuring secreted or cell associated levels of CBLALGOl protein using monoclonal and polyclonal antibodies by standard methods known in the art, and this can be used to discover agents which may inhibit or enhance the production of CBLALGOl (also called antagonist or agonist, respectively) from suitably manipulated cells or tissues.
  • the CBLALGOl protein may be used to identify membrane bound or soluble receptors, if any, through standard receptor binding techniques known in the art.
  • ligand binding and crosslinking assays include, but are not limited to, ligand binding and crosslinking assays in which the CBLALGOl is labeled with a radioactive isotope (eg 1251), chemically modified (eg biotinylated), or fused to a peptide sequence suitable for detection or purification, and incubated with a source of the putative receptor (cells, cell membranes, cell supernatants, tissue extracts, bodily fluids). Other methods include biophysical techniques such as surface plasmon resonance and spectroscopy. In addition to being used for purification and cloning of the receptor, these binding assays can be used to identify agonists and antagonists of CBLALGOl which compete with the binding of CBLALGOl to its receptors, if any. Standard methods for conducting screening assays are well understood in the art.
  • CBLALGOl polypeptide antagonists include antibodies or, in some cases, oligonucleotides or proteins which are closely related to the ligands, substrates, receptors, enzymes, etc, as the case may be, of the CBLALGOl polypeptide, e.g., a fragment of the hgands, substrates, receptors, enzymes, etc.; or small molecules which bind to the polypetide of the present invention but do not elicit a response, so that the activity of the polypeptide is prevented.
  • the present invention relates to a screening kit for identifying agonists, antagonists, ligands, receptors, substrates, enzymes, etc.
  • CBLALGOl polypeptides for CBLALGOl polypeptides; or compounds which decrease or enhance the production of CBLALGOl polypeptides, which comprises: (a) a CBLALGOl polypeptide, preferably that of SEQ ID NO:2; (b) a recombinant cell expressing a CBLALGOl polypeptide, preferably that of SEQ ID NO:2;
  • kits may comprise a substantial component.
  • This invention provides methods of treating abnormal conditions such as, kidney disease, diabetes mellitus, and cancer, related to both an excess of and insufficient amounts of CBLALGOl polypeptide activity.
  • CBLALGOl polypeptide is administered to a subject an inhibitor compound (antagonist) as hereinabove described along with a pharmaceutically acceptable carrier in an amount effective to inhibit the function of the CBLALGOl polypeptide, such as, for example, by blocking the binding of ligands, substrates, receptors, enzymes, etc, or by inhibiting a second signal, and thereby alleviating the abnormal condition.
  • soluble forms of CBLALGOl polypeptides still capable of binding the ligand, substrate, enzymes, receptors, etc. in competition with endogenous CBLALGOl polypeptide may be administered. Typical embodiments of such competitors comprise fragments of the CBLALGOl polypeptide.
  • expression of the gene encoding endogenous CBLALGOl polypeptide can be inhibited using expression blocking techniques.
  • Known such techniques involve the use of antisense sequences, either internally generated or separately administered. See, for example, O'Connor, J Neurochem (1991) 56:560 in Oligodeoxynucleotides as Antisense Inhibitors of Gene Expression. CRC Press, Boca Raton, FL (1988).
  • oligonucleotides which form triple helices with the gene can be supplied. See, for example, Lee et al, Nucleic Acids Res (1979) 3:173; Cooney et al, Science (1988) 241:456; Dervan et al, Science (1991) 251:1360.
  • oligomers can be administered per se or the relevant oligomers can be expressed in vivo.
  • CBLALGO 1 and its activity For treating abnormal conditions related to an under-expression of CBLALGO 1 and its activity, several approaches are also available.
  • One approach comprises administering to a subject a therapeutically effective amount of a compound which activates CBLALGOl polypeptide, i.e., an agonist as described above, in combination with a pharmaceutically acceptable carrier, to thereby alleviate the abnormal condition.
  • gene therapy may be employed to effect the endogenous production of CBLALGOl by the relevant cells in the subject.
  • a polynucleotide of the invention may be engineered for expression in a replication defective retroviral vector, as discussed above.
  • the retroviral expression construct may then be isolated and introduced into a packaging cell transduced with a retroviral plasmid vector containing RNA encoding a polypeptide of the present invention such that the packaging cell now produces infectious viral particles containing the gene of interest.
  • These producer cells may be administered to a subject for engineering cells in vivo and expression of the polypeptide in vivo.
  • Another approach is to administer a therapeutic amount of CBLALGO 1 polypeptides in combination with a suitable pharmaceutical carrier.
  • Peptides such as the soluble form of CBLALGOl polypeptides, and agonists and antagonist peptides or small molecules, may be formulated in combination with a suitable pharmaceutical carrier.
  • suitable pharmaceutical carrier include but are not limited to, saline, buffered saline, dextrose, water, glycerol, ethanol, and combinations thereof. Formulation should suit the mode of administration, and is well within the skill of the art.
  • the invention further relates to pharmaceutical packs and kits comprising one or more containers filled with one or more of the ingredients of the aforementioned compositions of the invention.
  • Polypeptides and other compounds of the present invention may be employed alone or in conjunction with other compounds, such as therapeutic compounds.
  • systemic administration of the pharmaceutical compositions include injection, typically by intravenous injection.
  • Other injection routes such as subcutaneous, intramuscular, or intraperitoneal, can be used.
  • Alternative means for systemic administration include transmucosal and transdermal administration using penetrants such as bile salts or fiisidic acids or other detergents.
  • oral administration may also be possible.
  • Administration of these compounds may also be topical and/or localized, in the form of salves, pastes, gels and the like. The dosage range required depends on the choice of peptide, the route of administration, the nature of the formulation, the nature of the subject's condition, and the judgment of the attending practitioner.
  • Suitable dosages are in the range of 0.1-100 ⁇ g/kg of subject. Wide variations in the needed dosage, however, are to be expected in view of the variety of compounds available and the differing efficiencies of various routes of administration. For example, oral administration would be expected to require higher dosages than administration by intravenous injection. Variations in these dosage levels can be adjusted using standard empirical routines for optimization, as is well understood in the art.
  • Polypeptides used in treatment can also be generated endogenously in the subject, in treatment modalities often referred to as "gene therapy" as described above.
  • cells from a subject may be engineered with a polynucleotide, such as a DNA or RNA, to encode a polypeptide ex vivo, and for example, by the use of a retroviral plasmid vector. The cells are then introduced into the subject.
  • a polynucleotide such as a DNA or RNA

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Abstract

L'invention concerne des polypeptides et des polynucléotides CBLALG01 et des procédés d'obtention de ces polypeptides par des techniques recombinantes. Font aussi l'objet de cette invention des procédés d'utilisation des polypeptides et des polynucléotides CBLALG01 dans la conception de protocoles pour le traitement de maladies du rein, du diabète sucré et de cancers, entre autres, et des doses diagnostiques pour ces pathologies.
PCT/CN1998/000004 1998-01-18 1998-01-18 Gene semblable a golgi v-snare (gos-28) de rats (cblalg01) WO1999036523A1 (fr)

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PCT/CN1998/000004 WO1999036523A1 (fr) 1998-01-18 1998-01-18 Gene semblable a golgi v-snare (gos-28) de rats (cblalg01)

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PCT/CN1998/000004 WO1999036523A1 (fr) 1998-01-18 1998-01-18 Gene semblable a golgi v-snare (gos-28) de rats (cblalg01)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001038390A1 (fr) * 1999-11-26 2001-05-31 Bioroad Gene Development Ltd. Shanghai Nouveau polypeptide - proteine 25 snare humaine et polynucleotide la codant

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GENBANK, Accession U49099, SUBRAMANIAN V.N., PETER F., PHILP R., WONG S.H. et al., 05 June 1996. *
GENBANK, Accession U49841, NAGAHAMA M., ORCI L., RAVAZZOLA M., AMHERDT M., LACOMIS L. et al., 29 March 1997. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001038390A1 (fr) * 1999-11-26 2001-05-31 Bioroad Gene Development Ltd. Shanghai Nouveau polypeptide - proteine 25 snare humaine et polynucleotide la codant
US6919431B1 (en) 1999-11-26 2005-07-19 Shanghai Bio Road Gene Development, Ltd. Polypeptide-human SNARE protein 25 and a polynucleotide encoding the same

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