title: Identification and in silico characterization of a novel gene: TPA induced trans-membrane protein.
abstract: 12-O-Tetradecanoylphorbol-13-acetate (TPA) is a potent tumor promoter with wide ranging, diverse, and sometimes opposite cellular effects. Using oligonucleotide microarray analysis, we have identified a novel gene that is upregulated following treatment with TPA in the pancreatic cancer cell line CD18. Real-time PCR validated the microarray results in CD18 and HeLa cells, and showed that upregulation of the gene is time- and concentration-dependent. In silico analysis showed the gene product to be a single-pass transmembrane protein of 217 residues that is localized to the endoplasmic reticulum, thus the name TPA induced trans-membrane protein (TTMP). A luciferase reporter assay demonstrated that upregulation of TTMP by TPA is triggered at the promoter level.
authors.affiliation: Department of Surgery and Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
authors.forename: Chung-Yip
authors.initials: CY
authors.lastname: Chan
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Salabat
authors.forename: Xian-Zhong
authors.initials: XZ
authors.lastname: Ding
authors.forename: David L
authors.initials: DL
authors.lastname: Kelly
authors.forename: Mark S
authors.initials: MS
authors.lastname: Talamonti
authors.forename: Richard H
authors.initials: RH
authors.lastname: Bell
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Adrian
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics / Q000378:metabolism*; D000595:Amino Acid Sequence; D014408:Biomarkers, Tumor / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D045744:Cell Line, Tumor; D004305:Dose-Response Relationship, Drug; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects*; D006801:Humans; D008565:Membrane Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D008969:Molecular Sequence Data; D017386:Sequence Homology, Amino Acid; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*
chemical_list: D014408:Biomarkers, Tumor; C500154:C3orf52 protein, human; D008565:Membrane Proteins; D013755:Tetradecanoylphorbol Acetate