Monocyte-derived Nucleic Acids and Related Compositions and Methods

Abstract

Nucleic acids encoding various monocyte-derived proteins and related compositions, including purified proteins and specific antibodies are described. Methods of using such composition are also provided.

Description

FIELD OF THE INVENTION

[0001] The present invention is directed to compositions related to genes found in monocytes, cells which function in the immune system. These genes function in controlling development, differentiation, and/or physiology of the mammalian immune system. In particular, the invention provides nucleic acids, proteins, antibodies, and methods of using them.

BACKGROUND OF THE INVENTION

[0002] Monocytes are phagocytic cells that belong to the mononuclear phagocyte system and reside in the circulation. These cells originate in the bone marrow and remain only a short time in the marrow compartment once they differentiate. They then enter the circulation and can remain there for a relatively long period of time, e.g., a few days. Monocytes can enter the tissues and body cavities by a process known as diapedesis, where they differentiate into macrophages and possibly into dendritic cells. In an inflammatory response, the number of monocytes in the circulation may double, and many of the increased number of monocytes diapedese to the site of inflammation. For a review of monocytes and their functions, see, e.g., Gallin, et al. (eds), 1988, Inflammation: Basic Principles and Clinical Correlates, Raven Press, NY; van Furth (ed), 1985, Mononuclear Phagocytes: Characteristics, Physiology and Function, Martinus Nijhoff, Dordrecht, Netherlands.

[0003] Antigen presentation refers to the cellular events in which a proteinaceous antigen is taken up, processed by antigen presenting cells (APC), and then recognized to initiate an immune response. The most active antigen presenting cells have been characterized as the macrophages, which are direct developmental products from monocytes; dendritic cells; and certain B cells.

[0004] Macrophages are found in most tissues and are highly active in internalization of a wide variety of protein antigens and microorganisms. They have a highly developed endocytic activity, and secrete many products important in the initiation of an immune response. For this reason, it is believed that many genes expressed by monocytes or induced by monocyte activation are important in antigen uptake, processing, presentation, or regulation of the resulting immune response.

[0005] Despite the importance of monocytes to immune system function, these cells remain poorly characterized, both in terms of the proteins they express and in terms of many of their functions, in particular, the processes and mechanisms related to the initiation of an immune response, including antigen processing and presentation. There is thus a need in the art for agents useful in the diagnosis and treatment of medical conditions caused by, e.g., the inappropriate regulation, development, or physiology of antigen presenting cells.

SUMMARY OF THE INVENTION

[0006] The present invention fulfills this need by providing compositions and methods for determining the presence, amount, distribution and normalcy of certain gene products and for facilitating the discovery of agents for treating certain disease states.

[0007] The invention is based upon the discovery of novel genes and gene products isolated from activated monocytes.

[0008] The invention provides isolated nucleic acid sequences comprising at least about 12, preferably at least about 18, most preferably at least about 20-35, and most preferably 35-55 or more consecutive nucleotides shown in SEQ ID NO: 1, 3, 5, 7, or 9, or which encode an amino acid sequence shown in SEQ ID NO: 2, 4, 6, 8 or 10, including complete protein coding sequences, and complements thereof. The invention encompasses sequence-conservative variants and function-conservative variants of these sequences. The nucleic acids may be DNA, RNA, DNA/RNA duplexes, protein-nucleic acid (PNA), or derivatives thereof. The invention also encompasses recombinant DNA vectors (including DNA expression vectors) comprising these sequences; cells comprising such vectors, including bacterial, fungal, plant, insect, and mammalian cells; and methods for producing expression products comprising RNA and polypeptides encoded by the sequences.

[0009] Polypeptide sequences of the invention comprise at least eight, preferably at least about 10, and more preferably at least about 12 or more consecutive amino acid residues derived from SEQ ID NO: 2, 4, 6, 8 or 10. Function-conservative variants and homologs are included in the scope of the invention.

[0010] The invention further provides binding compositions, in particular antibodies, most particularly monoclonal antibodies, which specifically bind to polypeptides having an amino acid sequence shown in SEQ ID NO: 2, 4, 6, 8 or 10 or function conserved variants or homologs thereof. Methods are also provided for producing antibodies having the desired binding specificity in a host animal.

DETAILED DESCRIPTION OF THE INVENTION

[0011] All patent applications, patents, and literature references cited in this specification are hereby incorporated herein by reference in their entirety.

[0012] In practicing the present invention, many conventional techniques in molecular biology, microbiology, and recombinant DNA, are used. Such techniques are well known and are explained fully in, for example, Sambrook et al., 1989, Molecular Cloning: A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; DNA Cloning: A Practical Approach, Volumes I and II, 1985 (D. N. Glover ed.); Oligonucleotide Synthesis, 1984, (M. L. Gait ed.); Nucleic Acid Hybridization, 1985, (Hames and Higgins); Transcription and Translation, 1984 (Hames and Higgins eds.); Animal Cell Culture, 1986 (R. I. Freshney ed.); Immobilized Cells and Enzymes, 1986 (IRL Press); Perbal, 1984, A Practical Guide to Molecular Cloning; the series, Methods in Enzymology (Academic Press, Inc.); Gene Transfer Vectors for Mammalian Cells, 1987 (J. H. Miller and M. P. Calos eds., Cold Spring Harbor Laboratory); and Methods in Enzymology Vol. 154 and Vol. 155 (Wu and Grossman, and Wu, eds., respectively).

Definitions

[0013] 1. A "monocyte-derived" nucleic acid or polypeptide refers to the source from which the sequence was originally isolated.

[0014] 2. "Nucleic acid" or "polynucleotide" refers to purine- and pyrimidine-containing polymers of any length, either polyribonucleotides or polydeoxyribonucleotides or mixed polyribo-polydeoxyribo nucleotides. This includes single- and double-stranded molecules, i.e., DNA-DNA, DNA-RNA and RNA-RNA hybrids, as well as "protein nucleic acids" (PNA) formed by conjugating bases to an amino acid backbone. This also includes nucleic acids containing modified bases.

[0015] 3. A "coding sequence" or a "protein-coding sequence" is a polynucleotide sequence capable of being transcribed into mRNA and/or capable of being translated into a polypeptide. The boundaries of the coding sequence are typically determined by a translation start codon at the 5'-terminus and a translation stop codon at the 3'-terminus.

[0016] 4. A "complement" of a nucleic acid sequence refers to the "antisense" sequence that participates in Watson-Crick base-pairing with the original sequence.

[0017] 5. An "isolated" nucleic acid or polypeptide refers to component that is removed from its original environment (for example, its natural environment if it is naturally occurring). An isolated nucleic acid or polypeptide preferably contains less than about 50%, more preferably less than about 75%, and most preferably less than about 90%, of the cellular components with which it was originally associated.

[0018] 6. A nucleic acid or polypeptide sequence that is "derived from" a designated sequence refers to a sequence that corresponds to a region of the designated sequence. For nucleic acid sequences, this encompasses sequences that are homologous or complementary to the sequence, as well as "sequence-conservative variants" and "function-conservative variants." For polypeptide sequences, this encompasses "function-conservative variants." Sequence-conservative variants are those in which a change of one or more nucleotides in a given codon position results in no alteration in the amino acid encoded at that position. Function-conservative variants are those in which a given amino acid residue in a polypeptide has been changed without substantially altering the overall conformation and function of the native polypeptide, including, but not limited to, replacement of an amino acid with one having similar physico-chemical properties (such as, for example, acidic, basic, hydrophobic, and the like). "Function-conservative" variants also include any polypeptides that have the ability to elicit antibodies specific to a designated polypeptide.

[0019] 7. A "probe" refers to a nucleic acid or oligonucleotide that forms a hybrid structure with a sequence in a target region due to complementarity of at least one sequence in the probe with a sequence in the target.

[0020] 8. Nucleic acids are "hybridizable" to each other when at least one strand of nucleic acid can anneal to another nucleic acid strand under defined stringency conditions. Stringency of hybridization is determined, e.g., by a) the temperature at which hybridization and/or washing is performed, and b) the ionic strength and polarity (e.g., formamide) of the hybridization and washing solutions, as well as other parameters. Hybridization requires that the two nucleic acids contain substantially complementary sequences; depending on the stringency of hybridization, however, mismatches may be tolerated. The appropriate stringency for hybridizing nucleic acids depends on the length of the nucleic acids and the degree of complementarity, variables well known in the art.

[0021] 9. An "immunogenic component" is a moiety that is capable of eliciting a humoral and/or cellular immune response in a host animal.

[0022] 10. An "antigenic component" is a moiety that binds to its specific antibody with sufficiently high affinity to form a detectable antigen-antibody complex.

[0023] 11. A "sample" refers to a biological sample, such as, for example, tissue or fluid isolated from an individual or from an in vitro cell culture constituents, as well as samples obtained from laboratory procedures.

[0024] The invention provides nucleic acid sequences encoding mammalian proteins expressed on monocytes. While specific human monocyte-derived genes and gene products are described herein, the invention encompasses structurally (e.g., sequence) related embodiments from other sources or mammalian species, including polymorphic or individual variants. These will include, e.g., proteins which exhibit relatively few changes in sequence, e.g., less than about 5%, and number, e.g., less than 20 residue substitutions, typically less than 15, preferably less than 10, and more preferably less than 5 substitutions. These will also include versions which are truncated from full length and fusion proteins containing substantial segments of these sequences.

[0025] A gene/gene product, isolated from human monocyte cell library and designated FDF03, has been previously described in published International application WO 98/24906, the disclosure of which is incorporated herein in its entirety by reference. The FDF03 gene encodes a type I transmembrane protein comprising an extracellular portion characterized by Ig-like domains, indicating that this gene encodes a receptor member of the Ig superfamily.

[0026] SEQ NO: 1 shows the nucleic acid sequence encoding human FDF03 protein. The amino acid sequence of the FDF03 protein is shown in SEQ ID NO: 2. The putative coding region runs from about nucleotide 154 to nucleotide 1062. An N-terminal hydrophobic sequence corresponding to a putaive signal sequence runs from about amino acid residue -19 (Met) to amino acid residue -1 (Leu). An internal hydrophobic sequence corresponding to a putative transmembrane segment runs from about residue 177 (Ala) to residue 199 (Leu). The extracellular region is about 170 amino acids, with a potential Ig-like domain structure. The intracellular region is about 80 residues. Sequence analysis indicates similarity to GenBank clones H26010 and R50327 from humans.

[0027] Four human FDF03 homologs have now been discovered.

ED F03-ΔTM

[0028] The second human clone, designated FDF03-deltaTM (FDF03-ΔTM), appears to be a soluble form of human FDF03 generated by alternative splicing. The nucleic acid sequence encoding FDF03-ΔTM is shown in SEQ NO: 3. The amino acid sequence of the FDF03-ΔTM protein is shown in SEQ ID NO: 4.

[0029] cDNA of the FDF03-ΔTM molecule was amplified along with that of FDF03 during the analysis of human FDF03 expression by RT-PCR. Using primers designed in the 5'-UTR and 3'-UTR of FDF03 gene (FDF03-U25: 5'-ACAGCCCTCTTC-GGAGCCTCA (SEQ ID NO: 11) and FDF03-L1166: 5'-AAGCTGGCCCTGAACT CCTGG (SEQ ID NO: 12)), an approximately 200 base pair shorter band was amplified by RT-PCR from PMA/ionomycin activated PBL cDNA, then gel purified, cloned and sequenced. Different clones contained an identical insert of 943 base pairs with an open reading frame encoding a type I protein of 230 amino acids. The deduced amino acid sequence of FDF03-ΔTM matched perfectly with that of FDF03, but contained a gap of 73 amino acids that deleted the extracellular threonine-rich region and the transmembrane domain of FDF03. This resulted in a protein with a potential hydrophobic signal peptide followed by the extracellular Ig like-domain linked to the intracytoplasmic domain of FDF03. cDNA alignments with FDF03 sequence identified a deletion of 219 nucleotides in the FDF03-ΔTM sequence (FDF03 nucleotide 608 to 827) that did not introduce premature stop codons, suggesting that this molecule is the product of an alternative splicing. This molecule is believed to be a secreted soluble form of FDF03 and believed to bind to the same ligand(s) as FDF03.

[0030] The protein alignment of the FDF03 (SEQ ID NO: 2) and FDF03-ΔTM (SEQ ID NO: 4) is shown below.

TABLE-US-00001 1 MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03 1 MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03-ΔTM 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQKSGFLRISNLQKQDQ FDF03 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQKSGFLRISNLQKQDQ FDF03-ΔTM 121 SVYFCRVELDTRSSGRQQWQSIEGTKLSITQAVTTTTQRPSSMTTTWRLSSTTTTTGLRV FDF03 121 SVYFCRVELDTRSSGRQQWQSIEGTKLSITQ----------------------------- FDF03-ΔTM 181 TQGKRRSDSWHISLETAVGVAVAVTVLGIMILGLICLLRWRRRKGQQRTKATTPAREPFQ FDF03 152 --------------------------------------------GQQRTKATTPAREPFQ FDF03-ΔTM 241 NTEEPYENIRNEGQNTDPKLNPKDDGIVYASLALSSSTSPRAPPSHRPLKSPQNETLYSV FDF03 168 NTEEPYENIRNEGQNTDPKLNPKDDGIVYASLALSSSTSPRAPPSHRPLKSPQNETLYSV FDF03-ΔTM 303 LKA FDF03 230 LKA FDF03-ΔTM (-: deletion)

[0031] The third clone, designated FDF03-Short 1 (FDF03-S1), is an Ig-like molecule homologous to FDF03 but with a short intracytoplasmic domain and a charged residue in transmembrane domain. Comparative DNA and protein analysis suggests the presence of different genes for FDF03 and FDF03S1, rather than alternatively spliced products. The nucleic acid sequence encoding FDF03-S1 is shown in SEQ NO: 5. The amino acid sequence of the FDF03-S1 protein is shown in SEQ ID NO: 6.

[0032] FDF03-S1 is a type I transmembrane protein belonging to the Ig superfamily. FDF03-S1 contains a hydrophobic leader sequence followed by an extracellular region (˜170 residues) with a V-type Ig domain structure homologous to that of FDF03 (88% homology at the amino acid level). Unlike FDF03, FDF03-S1 possesses a transmembrane domain with a charged amino acid (K), and a small intracellular tail (15 residues) without ITIM or internalization motif. FDF03-S 1 is believed to represent an activation isoform of FDF03 and may associate with ITIM-bearing molecules such as DAP12. The amino acid sequence is shown below, wherein the signal peptide and transmembrane domain are underlined. The charged amino acid, lysine (K), residue (arrow) in the transmembrane domain may permit association with another chain, for example DAP12.

##STR00001##

[0033] The protein alignment of FDF03 (SEQ ID NO: 2) and FDF03-S1 (SEQ ID NO: 6) is shown below.

TABLE-US-00002 1 MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03 1 MGRPLLLPLLLLLQPPAFLQPGGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03-S1 + + + 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQKSGFLRISNLQKQDQ FDF03 61 LAIVPNVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQESGFLRISNLRKEDQ FDF03-S1 ++ + + + + 121 SVYFCRVELDTRSSGRQQWQSIEGTKLSITQAVTTTTQRPSSMTTTWRLSSTTTTTGLRV FDF03 121 SVYFCRVELDTRRSGRQQLQSIKGTKLTITQAVTTTT........TWRPSSTTTIAGLRV FDF03-S1 + + + + ++++++++ + ++ 181 TQGKRRSDSWHISLETAVGVAVAVTVLGIMILGLICLL..RWRRRKGQQRTKATTPAREP FDF03 173 TESKGHSESWHLSLDTAIRVALAVAVLKTVILGLLCLLLLWWRRRKGSRAPSSDF FDF03-S1 ++ ++ + + + ++ + + +++ + +++ ++++++++ 239 FQNTEEPYENIRNEGQNTDPKLNPKDDGIVYASLALSSSTSPRAPPSHRPLKSPQNETLY FDF03 299 SVLKA FDF03 +: residue different or gap

[0034] Distribution studies (RT-PCR) shows strong expression in B cells (pool resting +activated), T cells and PBL. Lower expression was observed in monocytes, dendritic cells and granulocytes.

FDF03-M14

[0035] The fourth clone, desginated FDF03-M14, is a potential soluble form of human FDF03 generated by alternative splicing. The nucleic acid sequence encoding FDF03-M14 is shown in SEQ ID NO: 7. The amino acid sequence of the FDF03-M-14 protein is shown in SEQ ID NO: 8. cDNA of this molecule was amplified along with that of FDF03 during the analysis of human FDF03 expression by RT-PCR. Using primers designed in the 5'-UTR and 3'-UTR of FDF03 gene (FDF03-U25: 5'-ACAGCCC-TCTTCGGAGCCTCA (SEQ ID NO: 11) and FDF03-L1166: 5'-AGCTGGCCCTGA-ACTCCTGG (SEQ ID NO: 12)), an approximately 200 base pair shorter band was amplified by RT-PCR from activated PBL cDNA, then gel purified, cloned and sequenced. One clone (M14) contained an insert of 908 base pairs with an ORF encoding a type I protein of 175 amino acids. cDNA alignments with FDF03 sequence identified a deletion of 253 nucleotides in FDF03-M14 sequence (FDF03 nucleotide 608 to 861) that deleted the sequences encoding the extracellular threonine-rich region, the transmembrane domain and the start of the intracytoplasmic domain of FDF03, and that introduced a prematured stop codon at position 655 of FDF03-M14. The deduced amino acid sequence of FDF03-M 14 resulted in a protein with a potential hydrophobic signal peptide followed by an extracellular Ig like-domain that matched perfectly with that of FDF03, but that was linked to a COOH-terminal 24 amino acid sequence different from FDF03. This molecule may be the product of an alternative splicing of FDF03 mRNA.

[0036] Like FDF03-ΔTM, this molecule may represent a secreted soluble form of FDF03 and may bind to the same ligand(s) as FDF03. The amino acid sequence is shown below, wherein the signal sequence is underlined.

TABLE-US-00003 (SEQ ID NO: 8) MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVE IPFSFYYPWELATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLN WTEGQKSGFLRISNLQKQDQSVYFCRVELDTRSSGRQQWQSIEGTKLSIT QGNPSKTQRSHMRISGMRDKIQIPS

[0037] The protein alignment of FDF03 (SEQ ID NO: 2) and FDF03-M14 (SEQ ID NO: 8) is shown below.

TABLE-US-00004 1 MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03 1 MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03-14 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQKSGFLRISNLQKQDQ FDF03 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQKSGFLRISNLQKQDQ FDF03-M14 121 SVYFCRVELDTRSSGRQQWQSIEGTKLSITQAVTTTTQRPSSMTTTWRLSSTTTTTGLRV FDF03 121 SVYFCRVELDTRSSGRQQWQSIEGTKLSITQGNPSKTQRSHMRISGMRDKIQIPS FDF03-M14 ***** ******** ******* 181 TQGKRRSDSWHISLETAVGVAVAVTVLGIMILGLICLLRWRRRKGQQRTKATTPAREPFQ FDF03 241 NTEEPYENIRNEGQNTDPKLNPKDDGIVYASLALSSSTSPRAPPSHRPLKSPQNETLYSVLKA FDF03 *: residue different

FDF03-S2

[0038] The fifth clone, designated FDF03-S2 is an Ig-like molecule homologous to FDF03 but with a short intracytoplasmic domain and a charged residue in transmembrane domain. This molecule is highly homologous to FDF03-S1 and is a potential DAP12-associated protein. The nucleic acid sequence encoding FDF03-S2 is shown is SEQ ID NO: 9. The amino acid sequence of the FDF03-S2 protein is shown in SEQ ID NO: 10.

[0039] cDNA of this molecule was amplified using primers specific for FDF03-S2. Specificity is obtained with forward primer designed in 5'UTR of FDF03-S2. FDF03-S2-forward: 5'-CAAGG-GATAAAAAGGCAC (SEQ ID NO: 13) (does not amplify FDF03, FDF03ΔTM or FDF03-S1). FDF03-S2-reverse: 5'-AACTCTCCTCCAGTCGGT (SEQ ID NO: 14) (can amplify FDF03-S1, but not FDF03 or FDF03deltaTM).

[0040] FDF03-S2 is a type I transmembrane protein belonging to the Ig superfamily. FDF03-S2 contains a hydrophobic leader sequence followed by an extracellular region (˜170 residues) with one V-type Ig domain structure homologous to that of FDF03 (˜85% homology at the amino acid level). Unlike FDF03, FDF03-S2 possesses a transmembrane domain with a charged amino acid (K), and a small intracellular tail (15 residues) without ITIM or internalization motif. FDF03-S2 is highly homologous to FDF03-S1 (3 amino acid difference in the extracellular domain and one amino acid missing in the transmembrane domain). Like FDF03-S 1, FDF03-S2 may represent an activation isoform of FDF03 and may associate with ITAM-bearing molecules such as DAP12.

[0041] There are two putative start codons in frame (position 117 and 309). The first one is not contained within a typical Kozak sequence. The sequence shown below is deduced from the second start codon (nucleotide 309), as starting at the first start codon in frame (position 117) does not encode for a hydrophobic sequence followed by another Ig-like domain. In the sequence shown below, the signal peptide and transmembrane domain are underlined. The charged amino acid, lysine (K) residue (arrow) in transmembrane domain may permit association with another chain, for example DAP12.

##STR00002##

[0042] The protein alignments of FDF03, FDF03-S1 and FDF03-S2 is shown below.

TABLE-US-00005 1 MGRPLLLPLLPLLLPPAFLQPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03 1 MGRPLLLPLLLLLQPPAFLQPGGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03-S1 1 MGRPLLLPLLLLLQPPAFLQPGGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWE FDF03-S2 + + + 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQKSGFLRISNLQKQDQ FDF03 61 LAIVPNVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQESGFLRISNLRKEDQ FDF03-S1 61 LATAPDVRISWRRGHFHGQSFYSTRPPSIHKDYVNRLFLNWTEGQESGFLRISNLRKEDQ FDF03-S2 ** * + + + 121 SVYFCRVELDTRSSGRQQWQSIEGTKLSITQAVTTTTQRPSSMTTTWRLSSTTTTTGLRV FDF03 121 SVYFCRVELDTRRSGRQQLQSIKGTKLTITQAVTTTTT........WRPSSTTTIAGLRV FDF03-S1 121 SVYFCRVELDTRRSGRQQLQSIKGTKLTITQAVTTTTT........WRPSSTTTIAGLRV FDF03-S2 + + + + ++++++++ + ++ 181 TQGKRRSDSWHISLETAVGVAVAVTVLGIMILGLICLL..RWRRRKGQQRTKATTPAREP FDF03 173 TESKGHSESWHLSLDTAIRVALAVAVLKTVILGLLCLLLLWWRRRKGSRAPSSDF FDF03-S1 173 TESKGHSESWHLSLDTAIRVALAVAVLKTVILGLLCLLL.WWRRRKGSRAPSSDF FDF03-S2 ++ ++ + + + ++ + + +++ + +*+ ++++++++ 239 FQNTEEPYENIRNEGQNTDPKLNPKDDGIVYASLALSSSTSPRAPPSHRPLKSPQNETLY FDF03 299 SVLKA FDF03 + : residue different or gap between FDF03-S2/FDF03-S1 and FDF03 * : residue different or gap between FDF03-S2/FDF03 and FDF03-S1

[0043] Distribution studies (RT-PCR) shows expression in activated dendritic cells (CD34-derived), PBMC, monocytes and tonsil B cells.

[0044] Alignment with human IgV domains and TCR V domain is given below. This alignment shows the conserved VDJ structure of FDF03.

TABLE-US-00006 Ig V region QVQ.LQESGPG.LVKPSETLSLTCTVSGGSVSSGSYYWSW.IRQAPGKGLEWIG TCR human QVQ.LQESGPG.LVKPSETLSLTCTVSGYSISSG.YYWGW.IRQPPGKGLEWIG FDF03 QPSGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWELATAPDVRISWRR FDF03-S1 QPGGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWELAIVPNVRISWRR FDF03-S2 QPGGSTGSGPSYLYGVTQPKHLSASMGGSVEIPFSFYYPWELATAPDVRISWRR + +++ + + + + + + + Ig V region YIYYSGSTNY.......NRSHKSRVNIS.VDTAKNQFSLKLSSVSTADTAVYYCARIT TCR human SIYHSGSTYY.......NPSLKSRVTIS.VDTSKNQFSLKLSSVTAADTAVYYCARVR FDF03 GHFH.GQSFYSTRPPSIHKDYVNALFLNWTEGQKSGF.LRISNLQKQDQSVYFC.RVE FDF03-S1 GHFH.GQSFYSTRPPSIHKDYVNRLFLNWTEGQESGF.LRISNLRKEDQSVYFC.RVE FDF03-S2 GHFH.GQSFYSTRPPSIHKDYVNRLFLNWTEGQESGF.LRISNLRKEDQSVYFC.RVE + + + + + + + ++ + + Ig V region TTVPSSWYYYYMDVWDKGTTVTVSS TCR human RRYSSSAS...KIIFGSGTRLSIR. FDF03 LDTRSSGRQQWQS..IEGTKLSITQ FDF03-S1 LDTRRSGRQQLQS..IKGTKLTITQ FDF03-S2 LDTRRSGRQQLQS..IKGTKLTITQ + ++

[0045] Studies of human genomic DNA clones show that chromosome 7 contains both FDF03-S 1 and FDF03 specific sequences, confirming that the two molecules are encoded by two different genes. These studies also suggest that FDF03-S1 and -S2 genes are two different alleles of the same gene. In addition, PCR from intronic sequence surrounding the areas of difference between S1 and S2 on genomic DNA from different donors shows the existence of homozygotes and S1/S2 heterozygotes at this locus. It is thus likely that these two cDNAs are from different alleles.

[0046] The genomic organization of the FDF03 gene confirms that FDF03-ΔTM is produced by alternative splicing (deletion of exon 3 coding for the hinge region and TM domain). This is also the case for FDF03-M14 (deletion of exons 3 and 4).

[0047] The two forms of FDF03-S1/2 may be advantageously used as population markers. The two forms of this protein will either not bind the same ligand (e.g., as in the case of the NK receptor family) or will bind at different affinities, thus potentially giving individuals a different response to receptor/ligand interaction.

[0048] The localization of the genes encoding FDF03 (including the ΔTM and M14 forms) and FDF03-S1 on human chromosome 7q22 is interesting because this region is frequently deleted in myelodystrophic syndromes such as Acute Myeloid Leukemia (AML). The implication of the possible deletion of a myeloid inhibitory receptor in a proliferative disease leads to a possible use in gene therapy.

Nucleic Acids, Vectors, and Host Cells

[0049] The invention provides nucleic acid sequences, in particular the nucleic acid sequences shown in SEQ ID NO: 1, 5, 7 or 9 or nucleic acid sequences which encode an amino acid sequences shown in SEQ ID NO: 2, 4, 6, 8 or 10. The invention encompasses isolated nucleic acid fragments comprising all or part of the individual nucleic acid sequences disclosed herein. The nucleic acid sequences of the invention comprise at least about 12, preferably at least about 18, more preferably at least about 20-35 and most preferably at least about 35-55 or more consecutive nucleotides, including complete protein-coding sequences, or complements thereof. The invention encompasses sequence-conservative variants and function-conservative variants of these sequences.

[0050] Nucleic acids comprising any of the sequences disclosed herein or subsequences thereof can be prepared by standard methods using the nucleic acid sequence information provided in SEQ ID NO: 1, 3, 5, 7 and 9. For example, nucleic acids can be chemically synthesized using, e.g., the phosphoramidite solid support method of Matteucci et al., 1981, J. Am. Chem. Soc. 103:3185, the method of Yoo et al., 1989, J. Biol. Chem. 764:17078, or other well known methods. This can be done by sequentially linking a series of oligonucleotide cassettes comprising pairs of synthetic oligonucleotides. The nucleic acids may be isolated directly from cells. Alternatively, the polymerase chain reaction (PCR) method can be used to produce the nucleic acids of the invention, using either chemically synthesized strands or genomic material as templates. Primers used for PCR can be synthesized using the sequence information provided herein and can further be designed to introduce appropriate new restriction sites, if desirable, to facilitate incorporation into a given vector for recombinant expression. Of course, due to the degeneracy of the genetic code, many different nucleotide sequences can encode polypeptides having the amino acid sequences defined by SEQ ID NO: 2, 4, 6, 8 or 10 subsequences thereof. The codons can be selected for optimal expression in prokaryotic or eukaryotic systems. Such degenerate variants are also encompassed by this invention.

[0051] The encoded polypeptides may be expressed by using many known vectors such as pUC plasmids, pET plasmids (Novagen, Inc., Madison, Wis.), or pRSET or pREP (Invitrogen, San Diego, Calif.), and many appropriate host cells such as Escherichia coli, Saccharomyces cerevisiae, and insect and mammalian cell lines using methods known to those skilled in the art. The particular choice of vector/host is not critical to the practice of the invention.

[0052] The nucleic acids of the present invention find use, e.g., as templates for the recombinant production of peptides or polypeptides, as probes and primers for the detection of the human genes described herein, for chromosome mapping, and as probes or to design PCR primers to identify homologous genes in other mammalian species. Homology may be determined experimentally. Alternatively, homology analysis may be performed computationally. In practicing the present invention, a gene that shares at least about 70% DNA sequence homology at the nucleotide level with the genome of another mammalian species is considered to be present in that species. The determination that a gene is present in another mammal may be achieved using any technique known in the art. Appropriate techniques include without limitation hybridization to genomic DNA, colony hybridization to a genomic or cDNA library, polymerase chain reaction (PCR) using degenerate primers or gene-specific primers and genomic DNA as a template, genetic complementation, antibody cross-reactivity, or biochemical complementation in vitro.

[0053] In applying these techniques, conditions are established that discriminate different levels of homology between probe and template. For example, for hybridization of a probe to immobilized DNA (whether in a Southern blot, dot blot, or colony hybridization format), varying the SSC concentration in the buffer allows the detection of hybrids having different levels of homology (1×SSC is 0.15 M NaCl-0.015 M Na citrate). In a wash buffer containing 6M urea and 0.4% sodium dodecyl sulfate, the presence of 2×SSC, 0.5×SSC, 0.1×SSC, and 0.05×SSC allows the formation of hybrids having threshold homologies of at least 55%+5%, 65%+5%, 75%+5%, and >85%, respectively. Preferably, once a gene has been identified in another organism by hybridization or PCR, the DNA sequence of the gene is determined directly.

[0054] It will be understood that some methods that detect homologous sequences may result in the identification or isolation of only a portion of the entire protein-coding sequence of a particular gene. The entire protein-coding sequence can be isolated and identified, for example, by using an isolated nucleic acid encoding the known portion of the sequence, or fragments thereof, to prime a sequencing reaction with cDNA as template; this is followed by sequencing the amplified product. The isolated nucleic acid encoding the disclosed sequence, or fragments thereof, can also be hybridized to appropriate cDNA libraries to identify clones containing additional complete segments of the protein-coding sequence of which the shorter sequence forms a part. Then, the entire protein-coding sequence, or fragments thereof, or nucleic acids encoding all or part of the sequence, or sequence-conservative or function-conservative variants thereof, may be employed in practicing the present invention.

[0055] In a similar manner, additional sequences derived from the 5' and 3' flanking regions of sequence encoding the protein, including regulatory sequences, may be isolated, and the nucleotide sequence determined.

Polypeptides

[0056] Both the naturally occurring and recombinant forms of the polypeptides described herein, including both glycosylated and non-glycosylated forms are encompassed by the invention. The polypeptides of the present invention, including function-conservative variants, may be isolated from human monocytes, or from heterologous organisms or cells (e.g., bacteria, fungi, insect, plant, and mammalian cells) into which a protein-coding sequence has been introduced and expressed. The proteins described herein, or portions thereof, also may be expressed as fusions with other proteins. The polypeptides may be chemically synthesized by commercially available automated procedures, including, without limitation, exclusive solid phase synthesis, partial solid phase methods, fragment condensation or classical solution synthesis. The polypeptides can also, advantageously, be made by in vitro translation.

[0057] Methods for polypeptide purification are well-known in the art, including, without limitation, preparative disc-gel electrophoresis, isoelectric focusing, sucrose density gradient centrifugation, HPLC, reversed-phase HPLC, gel filtration, ion exchange and partition chromatography, and countercurrent distribution. For some purposes, it is preferable to produce the polypeptide in a recombinant system in which the protein contains an additional sequence tag that facilitates purification, such as, but not limited to, a polyhistidine sequence. The polypeptide can then be purified from a crude lysate of the host cell by chromatography on an appropriate solid-phase matrix. Alternatively, antibodies produced against a protein or against peptides derived therefrom can be used as purification reagents. Other purification methods are possible.

[0058] The present invention also encompasses derivatives and homologues of the polypeptides specifically disclosed herein. For some purposes, nucleic acid sequences encoding the peptides may be altered by substitutions, additions, or deletions that provide for functionally equivalent molecules, i.e., function-conservative variants. For example, one or more amino acid residues within the sequence can be substituted by another amino acid of similar properties, such as, for example, positively charged amino acids (arginine, lysine, and histidine); negatively charged amino acids (aspartate and glutamate); polar neutral amino acids; and non-polar amino acids.

[0059] The isolated polypeptides may be modified by, for example, phosphorylation, sulfation, acylation, or other protein modifications. They may also be modified with a label capable of providing a detectable signal, either directly or indirectly, including, but not limited to, radioisotopes and fluorescent compounds.

[0060] The polypeptides of the invention find use, e.g., for binding studies, for construction and expression of modified molecules, for structure/function studies and for the preparation of polyclonal and monoclonal antibodies. Polypeptides useful as immunogenic components for preparing antibodies or as targets for binding agent studies are at least five or more residues in length. Preferably, the polypeptides comprise at least about 12, more preferably at least about 20, and most preferably at least about 30 or more residues. Methods for obtaining these polypeptides are well known and are explained in Immunochemical Methods in Cell and Molecular Biology, 1987 (Mayer and Waler, eds; Academic Press, London); Scopes, 1987, Protein Purification: Principles and Practice, Second Edition (Springer-Verlag, N.Y.) and Handbook of Experimental Immunology, 1986, Volumes I-IV (Weir and Blackwell, eds.).

[0061] Having isolated one member of a binding partner of a specific interaction, methods exist for isolating the counter-partner. See, e.g., Gearing et al., 1989, EMBO J. 8:3667-3676. Many methods of screening for binding activity are known by those skilled in the art and may be used to practice the invention. For example, an expression library can be screened for specific binding to the protein, e.g., by cell sorting, or other screening to detect subpopulations which express such a binding component. See, e.g., Ho et al., 1993, Proc. Natl. Acad. Sci.. USA 90:11267-11271. Alternatively, a panning method may be used. See, e.g., Seed and Aruffo, 1987, Proc. Natl. Acad. Sci. USA 84:3365-3369. A two-hybrid selection system may also be applied making appropriate constructs with the available protein sequences. See, e.g., Fields and Song, 1989, Nature 340:245-246. Several methods of automated assays have been developed in recent years so as to permit screening of tens of thousands of compounds in a short period of time.

Physical Variants

[0062] This invention also encompasses proteins or peptides having substantial amino acid sequence similarity with an amino acid sequence of a SEQ ID NO: 2, 4, 6, 8 or 10. Variants exhibiting substitutions, e.g., 20 or fewer, preferably 10 or fewer, and more preferably 5 or fewer substitutions, are encompassed. Where the substitutions are conservative substitutions, the variants will share immunogenic or antigenic similarity or cross-reactivity with a corresponding natural sequence protein. Natural variants include individual, allelic, polymorphic, strain, or species variants.

[0063] Amino acid sequence similarity, or sequence identity, is determined by optimizing residue matches, if necessary, by introducing gaps as required. This changes when considering conservative substitutions as matches. Conservative substitutions typically include substitutions within the following groups: glycine, alanine; valine, isoleucine, leucine; aspartic acid, glutamic acid; asparagine, glutamine; serine, threonine; lysine, arginine; and phenylalanine, tyrosine. Homologous amino acid sequences include natural allelic and interspecies variations in each respective protein sequence. Typical homologous proteins or peptides will have from 50-100% similarity (if gaps can be introduced), to 75-100% similarity (if conservative substitutions are included) with the amino acid sequence of the relevant protein. Identity measures will be at least about 50%, generally at least 60%, more generally at least 65%, usually at least 70%, more usually at least 75%, preferably at least 80%, and more preferably at least 80%, and in particularly preferred embodiments, at least 85% or more. See also Needleham et al., 1970, J. Mol. Biol. 48:443-453; Sankoff et al., 1983, Time Warps, String Edits, and Macromolecules: The Theory and Practice of Sequence Comparison Chapter One, Addison-Wesley, Reading, Mass.; and software packages from IntelliGenetics, Mountain View, Calif.; and the University of Wisconsin Genetics Computer Group (GCG), Madison, Wis.

[0064] Nucleic acids encoding the corresponding proteins will typically hybridize to SEQ ID NO: 1, 3, 5, 7 or 9 under stringent conditions. For example, nucleic acids encoding the respective proteins will typically hybridize to the nucleic acid of SEQ ID NO: 1, 3, 5, 7 or 9 under stringent hybridization conditions, while providing few false positive hybridization signals. Generally, stringent conditions are selected to be about 10° C. lower than the thermal melting point (Tm) for the sequence being hybridized to at a defined ionic strength and pH. The Tm is the temperature (under defined ionic strength and pH) at which 50% of the target sequence hybridizes to a perfectly matched probe. Typically, stringent conditions will be those in which the salt concentration in wash is about 0.02 molar at pH 7 and the temperature is at least about 50° C. Other factors may significantly affect the stringency of hybridization, including, among others, base composition and size of the complementary strands, the presence of organic solvents such as formamide, and the extent of base mismatching. A preferred embodiment will include nucleic acids that will bind to disclosed sequences in 50% formamide and 20-50 mM NaCl at 42° C.

[0065] An isolated nucleic acid can be readily modified by nucleotide substitutions, nucleotide deletions, nucleotide insertions, and inversions of nucleotide stretches. These modifications result in novel DNA sequences which encode these antigens, their derivatives, or proteins having highly similar physiological, immunogenic, or antigenic activity.

[0066] Modified sequences can be used to produce mutant antigens or to enhance expression. Enhanced expression may involve gene amplification, increased transcription, increased translation, and other mechanisms. Such mutant protein derivatives include predetermined or site-specific mutations of the respective protein or its fragments. "Mutant protein" encompasses a polypeptide otherwise falling within the homology definition of the proteins as set forth above, but having an amino acid sequence which differs from that of the protein as found in nature, whether by way of deletion, substitution, or insertion. In particular, "site specific mutant protein" generally includes proteins having significant similarity with a-protein having a sequence of SEQ ID NO: 2, 4, 6, 8 or 10. Generally, the variant will share many physicochemical and biological activities, e.g., antigenic or immunogenic, with those sequences, and in preferred embodiments contain most or all of the disclosed sequence.

[0067] Glycosylation alterations are included, e.g., made by modifying the glycosylation patterns of a polypeptide during its synthesis and processing, or in further processing steps. Particularly preferred means for accomplishing this are by exposing the polypeptide to glycosylating enzymes derived from cells that normally provide such processing, e.g., mammalian glycosylation enzymes. Deglycosylation enzymes are also contemplated. Also embraced are versions of the same primary amino acid sequence which have other minor modifications, including phosphorylated amino acid residues, e.g., phosphotyrosine, phosphoserine, or phosphothreonine, or other moieties, including ribosyl groups or cross-linking reagents. Also, proteins comprising substitutions are encompassed, which should retain substantial immunogenicity, to produce antibodies that recognize a protein of SEQ ID NO: 2, 4, 6, 8 or 10. Typically, these proteins will contain less than 20 residue substitutions from the disclosed sequence, more typically less than 10 substitutions, preferably less than 5, and more preferably less than three. Alternatively, proteins that begin and end at structural domains will usually retain antigenicity and cross immunogenicity.

[0068] A major group of derivatives are covalent conjugates of the proteins described herein or fragments thereof with other proteins or polypeptides. These derivatives can be synthesized in recombinant culture such as N- or C-terminal fusions or by the use of agents known in the art for their usefulness in cross-linking proteins through reactive side groups. Preferred protein derivatization sites with cross-linking agents are at free amino groups, carbohydrate moieties, and cysteine residues.

[0069] Fusion polypeptides between these proteins and other homologous or heterologous proteins are also provided. Heterologous polypeptides may be fusions between different surface markers, resulting in, e.g., a hybrid protein. Likewise, heterologous fusions may be constructed which would exhibit a combination of properties or activities of the derivative proteins. Typical examples are fusions of a reporter polypeptide, e.g., luciferase, with a segment or domain of a protein, e.g., a receptor-binding segment, so that the presence or location of the fused protein may be easily determined. See, e.g., U.S. Pat. No. 4,859,609. Other gene fusion partners include bacterial 13-galactosidase, trpE, Protein A, β-lactamase, alpha amylase, alcohol dehydrogenase, and yeast alpha mating factor. See, e.g., Godowski et al., 1988, Science 241:812-816.

[0070] Such polypeptides may also have amino acid residues that have been chemically modified by phosphorylation, sulfonation, biotinylation, or the addition or removal of other moieties, particularly those that have molecular shapes similar to phosphate groups. In some embodiments, the modifications will be useful labeling reagents, or serve as purification targets, e.g., affinity ligands.

[0071] This invention also contemplates the use of derivatives of these proteins other than variations in amino acid sequence or glycosylation. Such derivatives may involve covalent or aggregative association with chemical moieties. These derivatives generally fall into the three classes: (1) salts, (2) side chain and terminal residue covalent modifications, and (3) adsorption complexes, for example with cell membranes. Such covalent or aggregative derivatives are useful as immunogens, as reagents in immunoassays, or in purification methods such as for affinity purification of ligands or other binding ligands. For example, a protein antigen can be immobilized by covalent bonding to a solid support such as cyanogen bromide-activated Sepharose, by methods which are well known in the art, or adsorbed onto polyolefin surfaces, with or without glutaraldehyde cross-linking, for use in the assay or purification of antibodies. The proteins can also be labeled with a detectable group, e.g., radioiodinated by the chloramine T procedure, covalently bound to rare earth chelates, or conjugated to another fluorescent moiety for use in diagnostic assays. Purification of these proteins may be accomplished by immobilized antibodies.

Antibodies

[0072] The immunogenic components of this invention, as discribed above, are useful as antigens for preparing antibodies by standard methods. Such immunogenic components can be produced by proteolytic cleavage of larger polypeptides or by chemical synthesis or recombinant technology and are thus not limited by proteolytic cleavage sites. Preferably, smaller immunogenic components will first be rendered more immunogenic by cross-linking or by coupling to an immunogenic carrier molecule (i.e., a macromolecule having the property of independently eliciting an immunological response in a host animal, to which the immunogenic components of the invention can be covalently linked). Cross-linking or conjugation to a carrier molecule may be required because small polypeptide fragments sometimes act as haptens (molecules which are capable of specifically binding to an antibody but incapable of eliciting antibody production, i.e., they are not immunogenic). Conjugation of such fragments to an immunogenic carrier molecule renders them immunogenic through what is commonly known as the "carrier effect".

[0073] Antibodies according to the present invention include polyclonal and monoclonal antibodies. The antibodies may be elicited in an animal host by immunization with immunogenic components of the invention or may be formed by in vitro immunization (sensitization) of immune cells. The immunogenic components used to elicit the production of antibodies may be isolated from human cells (e.g., human monocytes) or chemically synthesized. The antibodies may also be produced in recombinant systems programmed with appropriate antibody-encoding DNA. Alternatively, the antibodies may be constructed by biochemical reconstitution of purified heavy and light chains.

[0074] The antibodies of this invention can be purified by standard methods, including but not limited to preparative disc-gel electrophoresis, isoelectric focusing, HPLC, reversed-phase HPLC, gel filtration, ion exchange and partition chromatography, and countercurrent distribution. Purification methods for antibodies are disclosed, e.g., in The Art of Antibody Purification, 1989, Amicon Division, W. R. Grace & Co. General protein purification methods are described in Protein Purification: Principles and Practice, R. K. Scopes, Ed., 1987, Springer-Verlag, New York, N.Y.

[0075] Suitable adjuvants for the vaccination of animals include but are not limited to Adjuvant 65 (containing peanut oil, mannide monooleate and aluminum monostearate); Freund's complete or incomplete adjuvant; mineral gels such as aluminum hydroxide, aluminum phosphate and alum; surfactants such as hexadecylamine, octadecylamine, lysolecithin, dimethyldioctadecyl-ammonium bromide, N,N-dioctadecyl-N',N'-bis(2-hydroxymethyl) propane-diamine, methoxyhexadecylglycerol and pluronic polyols; polyanions such as pyran, dextran sulfate, poly IC, polyacrylic acid and carbopol; peptides such as muramyl dipeptide, dimethylglycine and tuftsin; and oil emulsions. The immunogenic components could also be administered following incorporation into liposomes or other microcarriers. Information concerning adjuvants and various aspects of immunoassays are disclosed, e.g., in the series by P. Tijssen, 1987, Practice and Theory of Enzyme Immunoassays, 3rd Edition, Elsevier, N.Y.

[0076] Serum produced from animals thus immunized can be used directly. Alternatively, the IgG fraction can be separated from the serum using standard methods such as plasmaphoresis or adsorption chromatography using IgG specific adsorbents such as immobilized Protein A.

[0077] Hybridomas of the invention used to make monoclonal antibodies against the immunogenic components of the invention are produced by well-known techniques. Usually, the process involves the fusion of an immortalizing cell line with a B-lymphocyte that produces the desired antibody. Alternatively, non-fusion techniques for generating immortal antibody-producing cell lines are possible, and come within the purview of the present invention, e.g., virally-induced transformation, Casali et al., 1986, Science 234:476. Immortalizing cell lines are usually transformed mammalian cells, particularly myeloma cells of rodent, bovine, and human origin. Most frequently, rat or mouse myeloma cell lines are employed as a matter of convenience and availability.

[0078] Techniques for obtaining the appropriate lymphocytes from mammals injected with the immunogenic components are well known. Generally, peripheral blood lymphocytes (PBLs) are used if cells of human origin are desired, or spleen cells or lymph node cells are used if non-human mammalian sources are desired. A host animal is injected with repeated dosages of a preferably purified immunogenic component, and the animal is permitted to generate the desired antibody-producing cells before these are harvested for fusion with the immortalizing cell line. Techniques for fusion are also well known in the art, and in general involve mixing the cells with a fusing agent, such as polyethylene glycol.

[0079] Hybridomas are selected by standard procedures, such as HAT (hypoxanthine-aminopterin-thymidine) selection. From among these hybridomas, those secreting the desired antibody are selected by assaying their culture medium by standard immunoassays, such as Western blotting, ELISA (enzyme-linked immunosorbent assay), RIA (radioimmunoassay), or the like. Antibodies are recovered from the medium using standard protein purification techniques, Tijssen, 1985, Practice and Theory of Enzyme Immunoassays, Elsevier, Amsterdam.

[0080] Many references are available for guidance in applying any of the above techniques: Kohler et al., 1980, Hybridoma Techniques, Cold Spring Harbor Laboratory, New York; Tijssen, 1985, Practice and Theory of Enzyme Immunoassays, Elsevier, Amsterdam; Campbell, 1984, Monoclonal Antibody Technology, Elsevier, Amsterdam; Hurrell, 1982, Monoclonal Hybridoma Antibodies: Techniques and Applications, CRC Press, Boca Raton, Fla. Monoclonal antibodies can also be produced using well known phage library systems.

[0081] The use and generation of antibody fragments is also well known, e.g., Fab fragments: Tijssen, 1985, Practice and Theory of Enzyme Immunoassays, Elsevier, Amsterdam; Fv fragments: Hochman et al., 1973, Biochemistry 12:1130; Sharon et al., 1976, mBiochemistry 15:1591; Ehrlich et al., U.S. Pat. No. 4,355,023; and antibody half molecules: Auditore-Hargreaves, U.S. Pat. No. 4,470,925. These also may be useful in immunoassays.

[0082] These antibodies, whether polyclonal or monoclonal, can be used, e.g., in an immobilized form bound to a solid support by well known methods, to isolate and purify the immunogenic components by immunoaffinity chromatography. The antibodies are useful as probes to distinguish tissue and cell type distribution. The antibodies may be used to screen expression libraries for particular expression products. Usually the antibodies used in such a procedure will be labeled with a moiety allowing easy detection of presence of antigen by antibody binding. Antibodies to proteins may be used for the analysis or, or identification of specific cell population components which express the respective protein. By assaying the expression products of cells expressing the proteins described herein it is possible to diagnose disease, e.g., immune-compromised conditions, monocyte depleted conditions, or overproduction of monocytes. Antibodies raised against the proteins will also be useful to raise anti-idiotypic antibodies. These will be useful in detecting or diagnosing various immunological conditions related to expression of the respective antigens. The present invention encompasses antibodies that specifically recognize monocyte-derived immunogenic components. Such antibodies can be used conventionally, e.g., as reagents for purification of monocyte cell components, or in diagnostic applications.

Diagnostic Applications

[0083] The invention encompasses compositions, methods, and kits useful in clinical settings for the qualitative or quantitative diagnosis, i.e., detection of specific components in a biological sample. These applications utilize nucleic acids, peptides/polypeptides, or antibodies specific for the components described herein. Both antibody-based and nucleic acid-based diagnostic methods, including PCR-based diagnostic methods are contemplated. Detection of the level of monocyte cells present in a sample is important for diagnosis of certain aberrant disease conditions. For example, an increase in the number of monocytes in a tissue or the lymph system can be indicative of the presence of a monocyte hyperplasia, tissue or graft rejection, or inflammation. A low monocyte population can indicate an abnormal reaction to, e.g., a bacterial or viral infection, which may require an appropriate treatment to normalize the monocyte response.

[0084] Both the naturally occurring and the recombinant form of the proteins of this invention are particularly useful in kits and assay methods which are capable of screening compounds for binding activity to the proteins.

[0085] In nucleic-acid-type diagnostic methods, the sample to be analyzed may be contacted directed with the nucleic acid probes. Probes include oligonucleotides at least 12 nucleotides, preferably at least 18, and most preferably 20-35 or more nucleotides in length. Alternatively, the sample may be treated to extract the nucleic acids contained therein. It will be understood that the particular method used to extract DNA will depend on the nature of the biological sample. The resulting nucleic acid from the sample may be subjected to gel electrophoresis or other size separation techniques, or, the nucleic acid sample may be immobilized on an appropriate solid matrix without size separation or used for PCR.

[0086] Kits suitable for antibody-based diagnostic applications typically include one or more of the following components:

[0087] (i) Antibodies: The antibodies may be pre-labeled; alternatively, the antibody may be unlabelled and the ingredients for labeling may be included in the kit in separate containers, or a secondary, labeled antibody is provided; and

[0088] (ii) Reaction components: The kit may also contain other suitably packaged reagents and materials needed for the particular immunoassay protocol, including solid-phase matrices, if applicable, and standards.

[0089] Kits suitable for nucleic acid-based diagnostic applications typically include the following components:

[0090] (i) Probe DNA: The probe DNA may be pre-labeled; alternatively, the probe DNA may be unlabelled and the ingredients for labeling may be included in the kit in separate containers; and

[0091] (ii) Hybridization reagents: The kit may also contain other suitably packaged reagents and materials needed for the particular hybridization protocol, including solid-phase matrices, if applicable, and standards.

[0092] PCR based diagnostic kits are also contemplated and are encompassed by the invention.

[0093] The kits referred to above may include instructions for conducting the test. Furthermore, in preferred embodiments, the diagnostic kits are adaptable to high-throughput and/or automated operation.

Therapeutic Applications

[0094] The invention also provides reagents that may exhibit significant therapeutic value. The proteins (naturally occurring or recombinant), fragments thereof, and antibodies thereto, along with compounds identified as having binding affinity to the proteins, may be useful in the treatment of conditions associated with abnormal physiology or development. For example, a disease or disorder associated with abnormal expression or abnormal signaling by a monocyte, e.g., as an antigen presenting cell, is a target for an agonist or antagonist of the protein. The proteins likely play a role in regulation or development of hematopoietic cells, e.g., lymphoid cells, which affect immunological responses, e.g., antigen presentation and the resulting effector functions.

[0095] Other abnormal developmental conditions are known in cell types shown to possess monocyte protein mRNA by northern blot analysis. See Berkow (ed.) The Merck Manual of Diagnosis and Therapy, Merck & Co., Rahway, N.J.; and Thorn, et al. Harrison's Principles of Internal Medicine, McGraw-Hill, N.Y. Developmental or functional abnormalities, e.g., of the immune system, cause significant medical abnormalities and conditions that may be susceptible to prevention or treatment using compositions provided herein.

[0096] Recombinant monocyte-derived proteins or antibodies of the invention may be purified and then administered to a patient. These reagents can be combined for therapeutic use with additional active or inert ingredients, e.g., in conventional pharmaceutically acceptable carriers or diluents, e.g., immunogenic adjuvants, along with physiologically innocuous stabilizers and excipients. In particular, these may be useful in a vaccine context, where the antigen is combined with one of these therapeutic versions of agonists or antagonists. These combinations can be sterile filtered and placed into dosage forms as by lyophilization in dosage vials or storage in stabilized aqueous preparations. This invention also contemplates use of antibodies or binding fragments thereof, including forms which are not complement binding.

[0097] Drug screening using antibodies or receptor or fragments thereof can identify compounds having binding affinity to these monocyte-derived proteins, including isolation of associated components. Subsequent biological assays can then be utilized to determine if the compound blocks or antagonizes the activity of the protein. Likewise, a compound having intrinsic stimulating activity might activate the cell through the protein and is thus an agonist. This invention further contemplates the therapeutic use of antibodies to the proteins as antagonists.

[0098] The quantities of reagents necessary for effective therapy will depend upon many different factors, including means of administration, target site, physiological state of the patient, and other medicants administered. Thus, treatment dosages should be titrated to optimize safety and efficacy. Typically, dosages used in vitro may provide useful guidance in the amounts useful for in situ administration of these reagents. Animal testing of effective doses for treatment of particular disorders will provide further predictive indication of human dosage. Various considerations are described, e.g., in Gilman, et al. (eds.) (1990) Goodman and Gilman's: The Pharmacological Bases of Therapeutics (8th ed.) Pergamon Press; and (1990) Remington's Pharmaceutical Sciences (17th ed.) Mack Publishing Co., Easton, Pa. Methods for administration are discussed therein and below, e.g., for oral, intravenous, intraperitoneal, or intramuscular administration, transdermal diffusion, and others. Pharmaceutically acceptable carriers will include water, saline, buffers, and other compounds described, e.g., in the Merck Index, Merck & Co., Rahway, N.J. Dosage ranges would ordinarily be expected to be in amounts lower than 1 mM concentrations, typically less than about 10 μM concentrations, usually less than about 100 nM, preferably less than about 10 pM (picomolar), and most preferably less than about 1 fM (femtomolar), with an appropriate carrier. Slow release formulations, or a slow release apparatus will often be utilized for continuous administration.

[0099] The proteins, antagonists, and agonists could be administered directly to the host to be treated or, depending on the size of the compounds, it may be desirable to conjugate them to carrier proteins such as ovalbumin or serum albumin prior to their administration. Therapeutic formulations may be administered in many conventional dosage formulations. While it is possible for the active ingredient to be administered alone, it is preferable to present it as a pharmaceutical formulation. Formulations typically comprise at least one active ingredient, as defined above, together with one or more acceptable carriers thereof. Each carrier should be both pharmaceutically and physiologically acceptable in the sense of being compatible with the other ingredients and not injurious to the patient. Formulations include those suitable for oral, rectal, nasal, or parenteral (including subcutaneous, intramuscular, intravenous and intradermal) administration. The formulations may conveniently be presented in unit dosage form and may be prepared by any methods well known in the art of pharmacy. See, e.g., Gilman, et al. (eds.) (1990) Goodman and Gilman's: The Pharmacological Bases of Therapeutics (8th ed.) Pergamon Press; and (1990) Remington's Pharmaceutical Sciences (17th ed.) Mack Publishing Co., Easton, Pa.; Avis, et al. (eds.) (1993) Pharmaceutical Dosage Forms: Parenteral Medications Dekker, N.Y.; Lieberman, et al. (eds.) (1990) Pharmaceutical Dosgae Forms: Tablets Dekker, N.Y.; and Lieberman, et al. (eds.) (1990) Pharmaceutical Dosage Forms: Disperse Systems Dekker, N.Y. The therapy of this invention may be combined with or used in association with other chemotherapeutic or chemopreventive agents.

[0100] Many modifications and variations of this invention can be made without departing from its spirit and scope, as will be apparent to those skilled in the art. The specific embodiments described herein are offered by way of example only, and the invention is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled.

Sequence CWU 1

1

1611249DNAHomo sapiensCDS(154)..(1062)sig_peptide(154)..(210)mat_peptide(211)..(1062) 1gtttggggaa ggctcctggc ccccacagcc ctcttcggag cctgagcccg gctctcctca 60ctcacctcaa cccccaggcg gcccctccac agggcccctc tcctgcctgg acggctctgc 120tggtctcccc gtcccctgga gaagaacaag gcc atg ggt cgg ccc ctg ctg ctg 174 Met Gly Arg Pro Leu Leu Leu -15 ccc cta ctg ccc ctg ctg ctg ccg cca gca ttt ctg cag cct agt ggc 222Pro Leu Leu Pro Leu Leu Leu Pro Pro Ala Phe Leu Gln Pro Ser Gly -10 -5 -1 1 tcc aca gga tct ggt cca agc tac ctt tat ggg gtc act caa cca aaa 270Ser Thr Gly Ser Gly Pro Ser Tyr Leu Tyr Gly Val Thr Gln Pro Lys 5 10 15 20 cac ctc tca gcc tcc atg ggt ggc tct gtg gaa atc ccc ttc tcc ttc 318His Leu Ser Ala Ser Met Gly Gly Ser Val Glu Ile Pro Phe Ser Phe 25 30 35 tat tac ccc tgg gag tta gcc aca gct ccc gac gtg aga ata tcc tgg 366Tyr Tyr Pro Trp Glu Leu Ala Thr Ala Pro Asp Val Arg Ile Ser Trp 40 45 50 aga cgg ggc cac ttc cac ggg cag tcc ttc tac agc aca agg ccg cct 414Arg Arg Gly His Phe His Gly Gln Ser Phe Tyr Ser Thr Arg Pro Pro 55 60 65 tcc att cac aag gat tat gtg aac cgg ctc ttt ctg aac tgg aca gag 462Ser Ile His Lys Asp Tyr Val Asn Arg Leu Phe Leu Asn Trp Thr Glu 70 75 80 ggt cag aag agc ggc ttc ctc agg atc tcc aac ctg cag aag cag gac 510Gly Gln Lys Ser Gly Phe Leu Arg Ile Ser Asn Leu Gln Lys Gln Asp 85 90 95 100 cag tct gtg tat ttc tgc cga gtt gag ctg gac aca cgg agc tca ggg 558Gln Ser Val Tyr Phe Cys Arg Val Glu Leu Asp Thr Arg Ser Ser Gly 105 110 115 agg cag cag tgg cag tcc atc gag ggg acc aaa ctc tcc atc acc cag 606Arg Gln Gln Trp Gln Ser Ile Glu Gly Thr Lys Leu Ser Ile Thr Gln 120 125 130 gct gtc acg acc acc acc cag agg ccc agc agc atg act acc acc tgg 654Ala Val Thr Thr Thr Thr Gln Arg Pro Ser Ser Met Thr Thr Thr Trp 135 140 145 agg ctc agt agc aca acc acc aca acc ggc ctc agg gtc aca cag ggc 702Arg Leu Ser Ser Thr Thr Thr Thr Thr Gly Leu Arg Val Thr Gln Gly 150 155 160 aaa cga cgc tca gac tct tgg cac ata agt ctg gag act gct gtg ggg 750Lys Arg Arg Ser Asp Ser Trp His Ile Ser Leu Glu Thr Ala Val Gly 165 170 175 180 gtg gca gtg gct gtc act gtg ctc gga atc atg att ttg gga ctg atc 798Val Ala Val Ala Val Thr Val Leu Gly Ile Met Ile Leu Gly Leu Ile 185 190 195 tgc ctc ctc agg tgg agg aga agg aaa ggt cag cag cgg act aaa gcc 846Cys Leu Leu Arg Trp Arg Arg Arg Lys Gly Gln Gln Arg Thr Lys Ala 200 205 210 aca acc cca gcc agg gaa ccc ttc caa aac aca gag gag cca tat gag 894Thr Thr Pro Ala Arg Glu Pro Phe Gln Asn Thr Glu Glu Pro Tyr Glu 215 220 225 aat atc agg aat gaa gga caa aat aca gat ccc aag cta aat ccc aag 942Asn Ile Arg Asn Glu Gly Gln Asn Thr Asp Pro Lys Leu Asn Pro Lys 230 235 240 gat gac ggc atc gta tat gct tcc ctt gcc ctc tcc agc tcc acc tca 990Asp Asp Gly Ile Val Tyr Ala Ser Leu Ala Leu Ser Ser Ser Thr Ser 245 250 255 260 ccc aga gca cct ccc agc cac cgt ccc ctc aag agc ccc cag aac gag 1038Pro Arg Ala Pro Pro Ser His Arg Pro Leu Lys Ser Pro Gln Asn Glu 265 270 275 acc ctg tac tct gtc tta aag gcc taaccaatgg acagccctct caagactgaa 1092Thr Leu Tyr Ser Val Leu Lys Ala 280 tggtgaggcc aggtacagtg gcgcacacct gtaatcccag ctactctgaa gcctgaggca 1152gaatcaagtg agcccaggag ttcagggcca gctttgataa tggagcgaga tgccatctct 1212agttaaaaat atatattaac aataaagtaa caaattt 12492303PRTHomo sapiens 2Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Pro Leu Leu Leu Pro Pro -15 -10 -5 Ala Phe Leu Gln Pro Ser Gly Ser Thr Gly Ser Gly Pro Ser Tyr Leu -1 1 5 10 Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly Gly Ser 15 20 25 Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala Thr Ala 30 35 40 45 Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly Gln Ser 50 55 60 Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val Asn Arg 65 70 75 Leu Phe Leu Asn Trp Thr Glu Gly Gln Lys Ser Gly Phe Leu Arg Ile 80 85 90 Ser Asn Leu Gln Lys Gln Asp Gln Ser Val Tyr Phe Cys Arg Val Glu 95 100 105 Leu Asp Thr Arg Ser Ser Gly Arg Gln Gln Trp Gln Ser Ile Glu Gly 110 115 120 125 Thr Lys Leu Ser Ile Thr Gln Ala Val Thr Thr Thr Thr Gln Arg Pro 130 135 140 Ser Ser Met Thr Thr Thr Trp Arg Leu Ser Ser Thr Thr Thr Thr Thr 145 150 155 Gly Leu Arg Val Thr Gln Gly Lys Arg Arg Ser Asp Ser Trp His Ile 160 165 170 Ser Leu Glu Thr Ala Val Gly Val Ala Val Ala Val Thr Val Leu Gly 175 180 185 Ile Met Ile Leu Gly Leu Ile Cys Leu Leu Arg Trp Arg Arg Arg Lys 190 195 200 205 Gly Gln Gln Arg Thr Lys Ala Thr Thr Pro Ala Arg Glu Pro Phe Gln 210 215 220 Asn Thr Glu Glu Pro Tyr Glu Asn Ile Arg Asn Glu Gly Gln Asn Thr 225 230 235 Asp Pro Lys Leu Asn Pro Lys Asp Asp Gly Ile Val Tyr Ala Ser Leu 240 245 250 Ala Leu Ser Ser Ser Thr Ser Pro Arg Ala Pro Pro Ser His Arg Pro 255 260 265 Leu Lys Ser Pro Gln Asn Glu Thr Leu Tyr Ser Val Leu Lys Ala 270 275 280 3943DNAHomo sapiensCDS(130)..(819)sig_peptide(130)..(180)mat_peptide(181)..(819) 3acagccctct tcggagcctc agcccggctc tcctcactca cctcaacccc caggcggccc 60ctccacaggg cccctctcct gcctggacgg ctctgctggt ctccccgtcc cctggagaag 120aacaaggcc atg ggt cgg ccc ctg ctg ctg ccc cta ctg ccc ctg ctg ctg 171 Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Pro Leu Leu Leu -15 -10 -5 ccg cca gca ttt ctg cag cct agt ggc tcc aca gga tct ggt cca agc 219Pro Pro Ala Phe Leu Gln Pro Ser Gly Ser Thr Gly Ser Gly Pro Ser -1 1 5 10 tac ctt tat ggg gtc act caa cca aaa cac ctc tca gcc tcc atg ggt 267Tyr Leu Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly 15 20 25 ggc tct gtg gaa atc ccc ttc tcc ttc tat tac ccc tgg gag tta gcc 315Gly Ser Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala 30 35 40 45 aca gct ccc gac gtg aga ata tcc tgg aga cgg ggc cac ttc cac ggg 363Thr Ala Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly 50 55 60 cag tcc ttc tac agc aca agg ccg cct tcc att cac aag gat tat gtg 411Gln Ser Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val 65 70 75 aac cgg ctc ttt ctg aac tgg aca gag ggt cag aag agc ggc ttc ctc 459Asn Arg Leu Phe Leu Asn Trp Thr Glu Gly Gln Lys Ser Gly Phe Leu 80 85 90 agg atc tcc aac ctg cag aag cag gac cag tct gtg tat ttc tgc cga 507Arg Ile Ser Asn Leu Gln Lys Gln Asp Gln Ser Val Tyr Phe Cys Arg 95 100 105 gtt gag ctg gac aca cgg agc tca ggg agg cag cag tgg cag tcc atc 555Val Glu Leu Asp Thr Arg Ser Ser Gly Arg Gln Gln Trp Gln Ser Ile 110 115 120 125 gag ggg acc aaa ctc tcc atc acc cag ggt cag cag cgg act aaa gcc 603Glu Gly Thr Lys Leu Ser Ile Thr Gln Gly Gln Gln Arg Thr Lys Ala 130 135 140 aca acc cca gcc agg gaa ccc ttc caa aac aca gag gag cca tat gag 651Thr Thr Pro Ala Arg Glu Pro Phe Gln Asn Thr Glu Glu Pro Tyr Glu 145 150 155 aat atc agg aat gaa gga caa aat aca gat ccc aag cta aat ccc aag 699Asn Ile Arg Asn Glu Gly Gln Asn Thr Asp Pro Lys Leu Asn Pro Lys 160 165 170 gat gac ggc atc gtc tat gct tcc ctt gcc ctc tcc agc tcc acc tca 747Asp Asp Gly Ile Val Tyr Ala Ser Leu Ala Leu Ser Ser Ser Thr Ser 175 180 185 ccc aga gca cct ccc agc cac cgt ccc ctc aag agc ccc cag aac gag 795Pro Arg Ala Pro Pro Ser His Arg Pro Leu Lys Ser Pro Gln Asn Glu 190 195 200 205 acc ctg tac tct gtc tta aag gcc taaccaatgg acagccctct caagactgaa 849Thr Leu Tyr Ser Val Leu Lys Ala 210 tggtgaggcc aggtacagtg gcgcacacct gtaatcccag ctactctgaa gcctgaggca 909gaatcaagtg agcccaggag ttcagggcca gctt 9434230PRTHomo sapiens 4Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Pro Leu Leu Leu Pro Pro -15 -10 -5 Ala Phe Leu Gln Pro Ser Gly Ser Thr Gly Ser Gly Pro Ser Tyr Leu -1 1 5 10 15 Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly Gly Ser 20 25 30 Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala Thr Ala 35 40 45 Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly Gln Ser 50 55 60 Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val Asn Arg 65 70 75 Leu Phe Leu Asn Trp Thr Glu Gly Gln Lys Ser Gly Phe Leu Arg Ile 80 85 90 95 Ser Asn Leu Gln Lys Gln Asp Gln Ser Val Tyr Phe Cys Arg Val Glu 100 105 110 Leu Asp Thr Arg Ser Ser Gly Arg Gln Gln Trp Gln Ser Ile Glu Gly 115 120 125 Thr Lys Leu Ser Ile Thr Gln Gly Gln Gln Arg Thr Lys Ala Thr Thr 130 135 140Pro Ala Arg Glu Pro Phe Gln Asn Thr Glu Glu Pro Tyr Glu Asn Ile 145 150 155Arg Asn Glu Gly Gln Asn Thr Asp Pro Lys Leu Asn Pro Lys Asp Asp 160 165 170 175Gly Ile Val Tyr Ala Ser Leu Ala Leu Ser Ser Ser Thr Ser Pro Arg 180 185 190 Ala Pro Pro Ser His Arg Pro Leu Lys Ser Pro Gln Asn Glu Thr Leu 195 200 205 Tyr Ser Val Leu Lys Ala 210 51450DNAHomo sapiensCDS(386)..(1066)sig_peptide(386)..(436)mat_peptide(437)..(1066) 5ccacgcgtcc ggcttctttg ggggtgaaga gattggggag gaatctccac ccctgggagg 60cagaagccag gcatagcgcg ctggctagga ctccagtacc gtgaagggag gcagtgagag 120cagacatctg tgcctcattc ctgatctcaa ggggaaagca agaacaaggg aggcttcctc 180aggatctcga acctgcggaa ggaggaccag tctgtgtact tctgccaagt ccagctggac 240atacagatca gggaggctgt cgtggcagtc catcaagggg acccacctca ccatcaccca 300ggccctcagg cagcccctcc acagggcccc tctcctgcct ggacagctct gctggtctcc 360ccgtcccctg gagaagaaca aggcc atg ggt cgg ccc ctg ctg ctg ccc ctg 412 Met Gly Arg Pro Leu Leu Leu Pro Leu -15 -10 ctg ctc ctg ctg cag ccg cca gca ttt ctg cag cct ggt ggc tcc aca 460Leu Leu Leu Leu Gln Pro Pro Ala Phe Leu Gln Pro Gly Gly Ser Thr -5 -1 1 5 gga tct ggt cca agc tac ctt tat ggg gtc act caa cca aaa cac ctc 508Gly Ser Gly Pro Ser Tyr Leu Tyr Gly Val Thr Gln Pro Lys His Leu 10 15 20 tca gcc tcc atg ggt ggc tct gtg gaa atc ccc ttc tcc ttc tat tac 556Ser Ala Ser Met Gly Gly Ser Val Glu Ile Pro Phe Ser Phe Tyr Tyr 25 30 35 40 ccc tgg gag tta gcc ata gtt ccc aac gtg aga ata tcc tgg aga cgg 604Pro Trp Glu Leu Ala Ile Val Pro Asn Val Arg Ile Ser Trp Arg Arg 45 50 55 ggc cac ttc cac ggg cag tcc ttc tac agc aca agg ccg cct tcc att 652Gly His Phe His Gly Gln Ser Phe Tyr Ser Thr Arg Pro Pro Ser Ile 60 65 70 cac aag gat tat gtg aac cgg ctc ttt ctg aac tgg aca gag ggt cag 700His Lys Asp Tyr Val Asn Arg Leu Phe Leu Asn Trp Thr Glu Gly Gln 75 80 85 gag agc ggc ttc ctc agg atc tca aac ctg cgg aag gag gac cag tct 748Glu Ser Gly Phe Leu Arg Ile Ser Asn Leu Arg Lys Glu Asp Gln Ser 90 95 100 gtg tat ttc tgc cga gtc gag ctg gac acc cgg aga tca ggg agg cag 796Val Tyr Phe Cys Arg Val Glu Leu Asp Thr Arg Arg Ser Gly Arg Gln 105 110 115 120 cag ttg cag tcc atc aag ggg acc aaa ctc acc atc acc cag gct gtc 844Gln Leu Gln Ser Ile Lys Gly Thr Lys Leu Thr Ile Thr Gln Ala Val 125 130 135 aca acc acc acc acc tgg agg ccc agc agc aca acc acc ata gcc ggc 892Thr Thr Thr Thr Thr Trp Arg Pro Ser Ser Thr Thr Thr Ile Ala Gly 140 145 150 ctc agg gtc aca gaa agc aaa ggg cac tca gaa tca tgg cac cta agt 940Leu Arg Val Thr Glu Ser Lys Gly His Ser Glu Ser Trp His Leu Ser 155 160 165 ctg gac act gcc atc agg gtt gca ttg gct gtc gct gtg ctc aaa act 988Leu Asp Thr Ala Ile Arg Val Ala Leu Ala Val Ala Val Leu Lys Thr 170 175 180 gtc att ttg gga ctg ctg tgc ctc ctc ctc ctg tgg tgg agg aga agg 1036Val Ile Leu Gly Leu Leu Cys Leu Leu Leu Leu Trp Trp Arg Arg Arg 185 190 195 200 aaa ggt agc agg gcg cca agc agt gac ttc tgaccaacag agtgtgggga 1086Lys Gly Ser Arg Ala Pro Ser Ser Asp Phe 205 210 gaagggatgt gtattagccc cggaggacgt gatgtgagac ccgcttgtga gtcctccaca 1146ctcgttcccc attggcaaga tacatggaga gcaccctgag gacctttaaa aggcaaagcc 1206gcaaggcaga aggaggctgg gtccctgaat caccgactgg aggagagtta cctacaagag 1266ccttcatcca ggagcatcca cactgcaatg atataggaat gaggtctgaa ctccactgaa 1326ttaaaccact ggcatttggg ggctgtttat tatagcagtg caaagagttc ctttatcctc 1386cccaaggatg gaaaaataca atttattttg cttaccataa aaaaaaaaaa aaaaaaaaaa 1446aaaa 14506227PRTHomo sapiens 6Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Leu Leu Leu Gln Pro Pro -15 -10 -5 Ala Phe Leu Gln Pro Gly Gly Ser Thr Gly Ser Gly Pro Ser Tyr Leu -1 1 5 10 15 Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly Gly Ser 20 25 30 Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala Ile Val 35 40 45 Pro Asn Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly Gln Ser 50 55 60Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val Asn Arg 65 70 75 Leu Phe Leu Asn Trp Thr Glu Gly Gln Glu Ser Gly Phe Leu Arg Ile 80 85 90 95 Ser Asn Leu Arg Lys Glu Asp Gln Ser Val Tyr Phe Cys Arg Val Glu 100 105 110 Leu Asp Thr Arg Arg Ser Gly Arg Gln Gln Leu Gln Ser Ile Lys Gly 115 120 125 Thr Lys Leu Thr Ile Thr Gln Ala Val

Thr Thr Thr Thr Thr Trp Arg 130 135 140 Pro Ser Ser Thr Thr Thr Ile Ala Gly Leu Arg Val Thr Glu Ser Lys 145 150 155 Gly His Ser Glu Ser Trp His Leu Ser Leu Asp Thr Ala Ile Arg Val 160 165 170 175 Ala Leu Ala Val Ala Val Leu Lys Thr Val Ile Leu Gly Leu Leu Cys 180 185 190 Leu Leu Leu Leu Trp Trp Arg Arg Arg Lys Gly Ser Arg Ala Pro Ser 195 200 205 Ser Asp Phe 210 7909DNAHomo sapiensCDS(130)..(654)sig_peptide(130)..(180)mat_peptide(181)..(654) 7acagccctct tcggagcctc agcccggctc tcctcactca cctcaacccc caggcggccc 60ctccacaggg cccctctcct gcctggacgg ctctgctggt ctccccgtcc cctggagaag 120aacaaggcc atg ggt cgg ccc ctg ctg ctg ccc cta ctg ccc ctg ctg ctg 171 Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Pro Leu Leu Leu -15 -10 -5 ccg cca gca ttt ctg cag cct agt ggc tcc aca gga tct ggt cca agc 219Pro Pro Ala Phe Leu Gln Pro Ser Gly Ser Thr Gly Ser Gly Pro Ser -1 1 5 10 tac ctt tat ggg gtc act caa cca aaa cac ctc tca gcc tcc atg ggt 267Tyr Leu Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly 15 20 25 ggc tct gtg gaa atc ccc ttc tcc ttc tat tac ccc tgg gag tta gcc 315Gly Ser Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala 30 35 40 45 aca gct ccc gac gtg aga ata tcc tgg aga cgg ggc cac ttc cac ggg 363Thr Ala Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly 50 55 60 cag tcc ttc tac agc aca agg ccg cct tcc att cac aag gat tat gtg 411Gln Ser Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val 65 70 75 aac cgg ctc ttt ctg aac tgg aca gag ggt cag aag agc ggc ttc ctc 459Asn Arg Leu Phe Leu Asn Trp Thr Glu Gly Gln Lys Ser Gly Phe Leu 80 85 90 agg atc tcc aac ctg cag aag cag gac cag tct gtg tat ttc tgc cga 507Arg Ile Ser Asn Leu Gln Lys Gln Asp Gln Ser Val Tyr Phe Cys Arg 95 100 105 gtt gag ctg gac aca cgg agc tca ggg agg cag cag tgg cag tcc atc 555Val Glu Leu Asp Thr Arg Ser Ser Gly Arg Gln Gln Trp Gln Ser Ile 110 115 120 125 gag ggg acc aaa ctc tcc atc acc cag ggg aac cct tcc aaa aca cag 603Glu Gly Thr Lys Leu Ser Ile Thr Gln Gly Asn Pro Ser Lys Thr Gln 130 135 140 agg agc cat atg aga ata tca gga atg aag gac aaa ata cag atc cca 651Arg Ser His Met Arg Ile Ser Gly Met Lys Asp Lys Ile Gln Ile Pro 145 150 155 agc taaatcccaa ggatgacggc atcgtctatg cttcccttgc cctctccagc 704Ser tccacctcac ccagagcacc tcccagccac cgtcccctca agagccccca gaacgagacc 764ctgtactctg tcttaaaggc ctaaccaatg gacagccctc tcaagactga atggtgaggc 824caggtacagt ggcgcacacc tgtaatccca gctactctga agcctgaggc agaatcaagt 884gagcccagga gttcagggcc agctt 9098175PRTHomo sapiens 8Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Pro Leu Leu Leu Pro Pro -15 -10 -5 Ala Phe Leu Gln Pro Ser Gly Ser Thr Gly Ser Gly Pro Ser Tyr Leu -1 1 5 10 15 Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly Gly Ser 20 25 30 Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala Thr Ala 35 40 45 Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly Gln Ser 50 55 60Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val Asn Arg 65 70 75 Leu Phe Leu Asn Trp Thr Glu Gly Gln Lys Ser Gly Phe Leu Arg Ile 80 85 90 95 Ser Asn Leu Gln Lys Gln Asp Gln Ser Val Tyr Phe Cys Arg Val Glu 100 105 110 Leu Asp Thr Arg Ser Ser Gly Arg Gln Gln Trp Gln Ser Ile Glu Gly 115 120 125 Thr Lys Leu Ser Ile Thr Gln Gly Asn Pro Ser Lys Thr Gln Arg Ser 130 135 140His Met Arg Ile Ser Gly Met Lys Asp Lys Ile Gln Ile Pro Ser 145 150 155 91459DNAHomo sapiensCDS(309)..(986)sig_peptide(309)..(359)mat_peptide(309)..(986) 9ggcacgacgc cccatctcta ctaataaaaa aaaaaaaaaa ggatttgaag tcctggccgg 60agcaattagg caagggataa aaaggcacct aaggcccttt tgcaataaga agccagatgg 120ataaaggaag tgctggtcac cctggaggtg tactggtttg gggaaggtcc ccggccccca 180cagccctctg gggagcctca ccctggctct ccccactcac ctcagccctc aggcagcccc 240tccacaggac ccctctcctg cctggacagc tctgctggtc tccccgtccc ctggagaaga 300acaaggcc atg ggt cgg ccc ctg ctg ctg ccc ctg ctg ctc ctg ctg cag 350 Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Leu Leu Leu Gln 1 5 10 ccg cca gca ttt ctg cag cct ggt ggc tcc aca gga tct ggt cca agc 398Pro Pro Ala Phe Leu Gln Pro Gly Gly Ser Thr Gly Ser Gly Pro Ser 15 20 25 30 tac ctt tat ggg gtc act caa cca aaa cac ctc tca gcc tcc atg ggt 446Tyr Leu Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly 35 40 45 ggc tct gtg gaa atc ccc ttc tcc ttc tat tac ccc tgg gag tta gcc 494Gly Ser Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala 50 55 60 aca gct ccc gac gtg aga ata tcc tgg aga cgg ggc cac ttc cac ggg 542Thr Ala Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly 65 70 75 cag tcc ttc tac agc aca agg ccg cct tcc att cac aag gat tat gtg 590Gln Ser Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val 80 85 90 aac cgg ctc ttt ctg aac tgg aca gag ggt cag gag agc ggc ttc ctc 638Asn Arg Leu Phe Leu Asn Trp Thr Glu Gly Gln Glu Ser Gly Phe Leu 95 100 105 110 agg atc tca aac ctg cgg aag gag gac cag tct gtg tat ttc tgc cga 686Arg Ile Ser Asn Leu Arg Lys Glu Asp Gln Ser Val Tyr Phe Cys Arg 115 120 125 gtc gag ctg gac acc cgg aga tca ggg agg cag cag ttg cag tcc atc 734Val Glu Leu Asp Thr Arg Arg Ser Gly Arg Gln Gln Leu Gln Ser Ile 130 135 140 aag ggg acc aaa ctc acc atc acc cag gct gtc aca acc acc acc acc 782Lys Gly Thr Lys Leu Thr Ile Thr Gln Ala Val Thr Thr Thr Thr Thr 145 150 155 tgg agg ccc agc agc aca acc acc ata gcc ggc ctc agg gtc aca gaa 830Trp Arg Pro Ser Ser Thr Thr Thr Ile Ala Gly Leu Arg Val Thr Glu 160 165 170 agc aaa ggg cac tca gaa tca tgg cac cta agt ctg gac act gcc atc 878Ser Lys Gly His Ser Glu Ser Trp His Leu Ser Leu Asp Thr Ala Ile 175 180 185 190 agg gtt gca ttg gct gtc gct gtg ctc aaa act gtc att ttg gga ctg 926Arg Val Ala Leu Ala Val Ala Val Leu Lys Thr Val Ile Leu Gly Leu 195 200 205 ctg tgc ctc ctc ctg tgg tgg agg aga agg aaa ggt agc agg gcg cca 974Leu Cys Leu Leu Leu Trp Trp Arg Arg Arg Lys Gly Ser Arg Ala Pro 210 215 220 agc agt gac ttc tgaccaacag agtgtgggga gaagggatgt gtattagccc 1026Ser Ser Asp Phe 225 cggaggacgt gatgtgagac ccgcttgtga gtcctccaca ctcgttcccc attggcaaga 1086tacatggaga gcaccctgag gacctttaaa aggcaaagcc gcaaggcaga aggaggctgg 1146gtccctgaat caccgactgg aggagagtta cctacaagag ccttcatcca ggagcatcca 1206cactgcaatg atataggaat gaggtctgaa ctccactgaa ttaaaccact ggcatttggg 1266ggctgttcat tatagcagtg caaagagttc ctttatcctc cccaaggatg gaaaatacaa 1326tttattttgc ttaccataca ccccttttct cctcgtccac attttccaat ctgtatggtg 1386gctgtcttct atggcagaag gttttgggga ataaatagcg tgaaatgctg ctgaaaaaaa 1446aaaaaaaaaa aaa 145910226PRTHomo sapiens 10Met Gly Arg Pro Leu Leu Leu Pro Leu Leu Leu Leu Leu Gln Pro Pro 1 5 10 15 Ala Phe Leu Gln Pro Gly Gly Ser Thr Gly Ser Gly Pro Ser Tyr Leu 20 25 30 Tyr Gly Val Thr Gln Pro Lys His Leu Ser Ala Ser Met Gly Gly Ser 35 40 45 Val Glu Ile Pro Phe Ser Phe Tyr Tyr Pro Trp Glu Leu Ala Thr Ala 50 55 60 Pro Asp Val Arg Ile Ser Trp Arg Arg Gly His Phe His Gly Gln Ser 65 70 75 80 Phe Tyr Ser Thr Arg Pro Pro Ser Ile His Lys Asp Tyr Val Asn Arg 85 90 95 Leu Phe Leu Asn Trp Thr Glu Gly Gln Glu Ser Gly Phe Leu Arg Ile 100 105 110 Ser Asn Leu Arg Lys Glu Asp Gln Ser Val Tyr Phe Cys Arg Val Glu 115 120 125 Leu Asp Thr Arg Arg Ser Gly Arg Gln Gln Leu Gln Ser Ile Lys Gly 130 135 140 Thr Lys Leu Thr Ile Thr Gln Ala Val Thr Thr Thr Thr Thr Trp Arg 145 150 155 160 Pro Ser Ser Thr Thr Thr Ile Ala Gly Leu Arg Val Thr Glu Ser Lys 165 170 175 Gly His Ser Glu Ser Trp His Leu Ser Leu Asp Thr Ala Ile Arg Val 180 185 190 Ala Leu Ala Val Ala Val Leu Lys Thr Val Ile Leu Gly Leu Leu Cys 195 200 205 Leu Leu Leu Trp Trp Arg Arg Arg Lys Gly Ser Arg Ala Pro Ser Ser 210 215 220 Asp Phe 225 1121DNAHomo sapiens 11acagccctct tcggagcctc a 211221DNAHomo sapiens 12aagctggccc tgaactcctg g 211318DNAHomo sapiens 13caagggataa aaaggcac 181418DNAHomo sapiens 14aactctcctc cagtcggt 1815126PRTHomo sapiens 15Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Glu 1 5 10 15 Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Gly Ser Val Ser Ser Gly 20 25 30 Ser Tyr Tyr Trp Ser Trp Ile Arg Gln Ala Pro Gly Lys Gly Leu Glu 35 40 45 Trp Ile Gly Tyr Ile Tyr Tyr Ser Gly Ser Thr Asn Tyr Asn Arg Ser 50 55 60 His Lys Ser Arg Val Asn Ile Ser Val Asp Thr Ala Lys Asn Gln Phe 65 70 75 80 Ser Leu Lys Leu Ser Ser Val Ser Thr Ala Asp Thr Ala Val Tyr Tyr 85 90 95 Cys Ala Arg Ile Thr Thr Thr Val Pro Ser Ser Trp Tyr Tyr Tyr Tyr 100 105 110 Met Asp Val Trp Asp Lys Gly Thr Thr Val Thr Val Ser Ser 115 120 125 16121PRTHomo sapiens 16Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Glu 1 5 10 15 Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Tyr Ser Ile Ser Ser Gly 20 25 30 Tyr Tyr Trp Gly Trp Ile Arg Gln Pro Pro Gly Lys Gly Leu Glu Trp 35 40 45 Ile Gly Ser Ile Tyr His Ser Gly Ser Thr Tyr Tyr Asn Pro Ser Leu 50 55 60 Lys Ser Arg Val Thr Ile Ser Val Asp Thr Ser Lys Asn Gln Phe Ser 65 70 75 80 Leu Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr Cys 85 90 95 Ala Arg Val Arg Arg Arg Tyr Ser Ser Ser Ala Ser Lys Ile Ile Phe 100 105 110 Gly Ser Gly Thr Arg Leu Ser Ile Arg 115 120

Claims

1. An isolated polypeptide comprising an amino acid sequence derived from SEQ ID NO: 2, 4, 6, 8 or 10.

2. The polypeptide of claim 1 comprising the amino acid sequence of the mature protein.

3. An isolated nucleic acid comprising a nucleotide sequence encoding an amino acid sequence derived from SEQ ID NO: 2, 4, 6, 8 or 10.

4. The nucleic acid of claim 3 wherein the nucleotide sequence encodes the mature protein.

5. The nucleic acid of claim 4 comprising the nucleotide sequence shown in SEQ ID: NO 1, 3, 5, 7 or 9.

6. A fusion protein comprising the polypeptide of claim 1.

7. A binding compound which specifically binds to the polypeptide of claim 1.

8. The binding compound of claim 7 which is an antibody or antibody fragment.

9. The binding compound of claim 8 wherein the anitbody is a monoclonal antibody.

10. An expression vector comprising the nucleic acid of claim 3.

11. A host cell comprising the vector of claim 10.

12. A process for recombinatly producing a polypeptide comprising culturing the host cell of claim 11 under conditions in which the polypeptide is expressed.

13. A method for detecting a specific nucleic acid sequence in a sample, said method comprising the steps of: (i) contacting a sample suspected to contain a specific nucleic acid sequence with a probe comprising a nucleic acid sequence comprising at least 8 consecutive nucleotides selected from SEQ ID NO: 1, 3, 5, 7, or 9 under conditions in which a hybrid can form between said probe and the specific nucleic acid in said sample; and (ii) detecting any hybrid formed in step (i), wherein detection of said hybrid indicates the presence of the specific nucleic acid sequence in said sample.

14. The method of claim 13 further comprising amplifying said specific sequence in said sample prior to said detecting step.

15. A method for detecting a specific antigenic component in a sample, said method comprising the steps of: (i) contacting a sample suspected to contain a specific antigenic component encoded by an amino acid sequence derived from SEQ ID NO: 2, 4, 6, 8, or 10 with an antibody specific for said component, under conditions in which a stable antigen-antibody complex can form between said antibody and said antigenic component in said sample; and (ii) detecting any antigen-antibody complex formed in step (i), wherein detection of an antigen-antibody complex indicates the presence of said antigenic component in said sample.

16. A method of screening for candidate therapeutic agents comprising: selecting as a target sequence a polypeptide having an amino acid sequence derived from SEQ ID NO: 2, 4, 6, 8 or 10; contacting a test compound with said target sequence; and selecting as candidate therapeutic agent those test compounds which bind to the target sequence.

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