title: Molecular characterization of prostate carcinoma tumor antigen-1, PCTA-1, a human galectin-8 related gene.
abstract: The galectin family of proteins has been associated with several diverse cellular processes. More than 30 years since the discovery of the first member, precise biological functions for the family as a whole, or for individual members has proven elusive. The isolation of Prostate Carcinoma Tumor Antigen-1 (PCTA-1), a cDNA closely related to rat and human Galectin-8, as a surface marker associated with prostate cancer was achieved using a previously described immunological subtraction approach, Surface Epitope Masking (SEM) approach, in combination with expression screening. It appears that PCTA-1 expression is almost ubiquitous in normal human tissues and could alter in specific contexts such as transformation or metastasis. Multiple expression isoforms of PCTA-1 at the mRNA level are observed. PCTA-1 maps to 1q42-43, a locus associated with predisposition to prostate cancer. We have determined the genomic structure of PCTA-1 to account for the several observed isoforms, performed expression analysis to determine distribution in normal and transformed contexts at the RNA and protein level and conducted over-expression studies to determine effects on cellular phenotype.
authors.affiliation: Department of Urology, Herbert Irving Comprehensive Cancer Center, Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA.
authors.forename: R V
authors.initials: RV
authors.lastname: Gopalkrishnan
authors.forename: T
authors.initials: T
authors.lastname: Roberts
authors.forename: S
authors.initials: S
authors.lastname: Tuli
authors.forename: D
authors.initials: D
authors.lastname: Kang
authors.forename: K A
authors.initials: KA
authors.lastname: Christiansen
authors.forename: P B
authors.initials: PB
authors.lastname: Fisher
mesh_terms: D020413:3' Untranslated Regions; D017398:Alternative Splicing; D000818:Animals; D001483:Base Sequence; D002461:Cell Line, Transformed; D002471:Cell Transformation, Neoplastic / Q000235:genetics; D002878:Chromosomes, Human, Pair 1; D037161:Galectins; D005786:Gene Expression Regulation; D006801:Humans; D037102:Lectins / Q000235:genetics*; D008297:Male; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000235:genetics* / Q000378:metabolism*; D011471:Prostatic Neoplasms / Q000235:genetics*; D051381:Rats
chemical_list: D020413:3' Untranslated Regions; D037161:Galectins; C091991:LGALS8 protein, human; D037102:Lectins; D009363:Neoplasm Proteins