Abstract: Described is a novel family of cell surface serpentine transmembrane antigens. Two of the proteins in this family are exclusively or predominantly expressed in the prostate, as well as in prostate cancer, and thus members of this family have been termed “STEAP” (Six Transmembrane Epithelial Antigen of the Prostate). Four particular human STEAPs are described and characterized herein. The human STEAPs exhibit a high degree of structural conservation among them but show no significant structural homology to any known human proteins. The prototype member of the STEAP family, STEAP-1, appears to be a type IIIa membrane protein expressed predominantly in prostate cells in normal human tissues. Structurally, STEAP-1 is a 339 amino acid protein characterized by a molecular topology of six transmembrane domains and intracellular N- and C-termini, suggesting that it folds in a “serpentine” manner into three extracellular and two intracellular loops.

Abstract: A novel gene 202P5A5 and its encoded protein, and variants thereof, are described wherein 202P5A5 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 202P5A5 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 202P5A5 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 202P5A5 can be used in active or passive immunization.

Abstract: Described is a gene and its encoded secreted tumor antigen, termed 36P6D5, and to diagnostic and therapeutic methods and compositions useful in the management of various cancers which express 36P6D5, particularly including cancers of the bladder, kidney, prostate, breast, colon, ovary and pancreas.

Abstract: A novel gene 273P4B7 and its encoded protein, and variants thereof, are described wherein 273P4B7 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table 1. Consequently, 273P4B7 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 273P4B7 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 273P4B7 can be used in active or passive immunization.

Abstract: A novel gene (designated PHOR-1) that is highly over-expressed in prostate and other cancers and its encoded protein are described. PHOR-1 is a G protein-coupled receptor with homology to receptors involved in olfaction. PHOR-1 in normal human tissues is restricted to prostate, and this gene is highly over-expressed in prostate cancer as well as in cancers of the kidney, uterus, cervix, stomach and rectum. Consequently, PHOR-1 provides a diagnostic and/or therapeutic target for prostate cancer.

Abstract: A novel gene 098P4B6 (also designated STEAP-2) and its encoded protein, and variants thereof, are described wherein 98P4B6 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table 1. Consequently, 98P4B6 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 98P4B6 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 98P4B6 can be used in active or passive immunization.

Abstract: A novel gene 251P5G2 and its encoded protein, and variants thereof, are described wherein 251P5G2 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 251P5G2 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 251P5G2 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 251P5G2 can be used in active or passive immunization.

Abstract: A novel gene 0161P2F10B (also designated 161P2F10B) and its encoded protein, and variants thereof, are described wherein 161P2F10B exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 161P2F10B provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 161P2F10B gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 161P2F10B can be used in active or passive immunization.

Abstract: Antibodies and molecules derived therefrom that bind to novel STEAP-1 protein, and variants thereof, are described wherein STEAP-1 exhibits issue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, STEAP-1 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The STEAP-1 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with STEAP-1 can be used in active or passive immunization.

Abstract: Described is a novel family of cell surface serpentine transmembrane antigens. Two of the proteins in this family are exclusively or predominantly expressed in the prostate, as well as in prostate cancer, and thus members of this family have been termed “STEAP” (Six Transmembrane Epithelial Antigen of the Prostate). Four particular human STEAPs are described and characterized herein. The human STEAPs exhibit a high degree of structural conservation among them but show no significant structural homology to any known human proteins. The prototype member of the STEAP family, STEAP-1, appears to be a type IIIa membrane protein expressed predominantly in prostate cells in normal human tissues. Structurally, STEAP-1 is a 339 amino acid protein characterized by a molecular topology of six transmembrane domains and intracellular N- and C-termini, suggesting that it folds in a “serpentine” manner into three extracellular and two intracellular loops.

Abstract: Described is a novel family of cell surface serpentine transmembrane antigens. Two of the proteins in this family are exclusively or predominantly expressed in the prostate, as well as in prostate cancer, and thus members of this family have been termed “STEAP” (SIX Transmembrane Epithelial Antigens of the Prostate). Four particular human STEAPs are described and characterized herein. The human STEAPs exhibit a high degree of structural conservation among them but show no significant structural homology to any known human proteins. The prototype member of the STEAP family, STEAP-1, appears to be a type IIIa membrane protein expressed predominantly in prostate cells in normal human tissues. Structurally, STEAP-1 is a 339 amino acid protein characterized by a molecular topology of six transmembrane domains and intracellular N— and C-termini, suggesting that it folds in a “serpentine” manner into three extracellular and two intracellular loops.

Abstract: Described is a novel family of cell surface serpentine transmembrane antigens. Two of the proteins in this family are exclusively or predominantly expressed in the prostate, as well as in prostate cancer, and thus members of this family have been termed “STEAP” (Six Transmembrane Epithelial Antigen of the Prostate). Four particular human STEAPs are described and characterized herein. The human STEAPs exhibit a high degree of structural conservation among them but show no significant structural homology to any known human proteins. The prototype member of the STEAP family, STEAP-1, appears to be a type IIIa membrane protein expressed predominantly in prostate cells in normal human tissues. Structurally, STEAP-1 is a 339 amino acid protein characterized by a molecular topology of six transmembrane domains and intracellular N- and C-termini, suggesting that it folds in a “serpentine” manner into three extracellular and two intracellular loops.

Abstract: A novel gene (designated PC-LECTIN) that is highly overexpressed in prostate cancer and its encoded protein is described. PC-LECTIN in normal human tissues is restricted to testis, but is highly expressed in prostate cancer. Consequently, PC-LECTIN provides a diagnostic and/or therapeutic target for prostate cancer.

Abstract: A novel gene 282P1G3 and its encoded protein, and variants thereof, are described wherein 282P1G3 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 282P1G3 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 282P1G3 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 282P1G3 can be used in active or passive immunization.

Abstract: A novel gene (designated 101P3A11 or PHOR-1) and its encoded protein, and variants thereof, are described wherein 101P3A11 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 101P3A11 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 101P3A11 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 101P3A11 can be used in active or passive immunization.

Abstract: A novel gene (designated 184P1E2) and its encoded protein, and variants thereof, are described wherein 184P1E2 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 184P1E2 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 184P1E2 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 184P1E2 can be used in active or passive immunization.

Abstract: A novel gene 024P4C12 (also designated 24P4C12) and its encoded protein, and variants thereof, are described wherein 24P4C12 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 24P4C12 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 24P4C12 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 24P4C12 can be used in active or passive immunization.

Abstract: Novel genes designated and set forth in FIG. 2 and their respective encoded proteins, and variants thereof, are described wherein a gene of the invention exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers such as those listed in Table I. Consequently, of gene products of a gene of FIG. 2 provide diagnostic, prognostic, prophylactic and/or therapeutic targets for cancer. A gene of FIG. 2 or fragment thereof, its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with a gene product of FIG. 2 can be used in active or passive immunization.

Abstract: Novel genes designated and set forth in FIG. 2 and their respective encoded proteins, and variants thereof, are described wherein a gene of the invention exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers such as those listed in Table I. Consequently, of gene products of a gene of FIG. 2 provide diagnostic, prognostic, prophylactic and/or therapeutic targets for cancer. A gene of FIG. 2 or fragment thereof, its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with a gene product of FIG. 2 can be used in active or passive immunization.

Abstract: Novel genes designated and set forth in FIG. 2 and their respective encoded proteins, and variants thereof, are described wherein a gene of the invention exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers such as those listed in Table I. Consequently, of gene products of a gene of FIG. 2 provide diagnostic, prognostic, prophylactic and/or therapeutic targets for cancer. A gene of FIG. 2 or fragment thereof, its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with a gene product of FIG. 2 can be used in active or passive immunization.