Receptor-type tyrosine-protein phosphatase H is an enzyme that in humans is encoded by the PTPRHgene.[1][2]
The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP possesses an extracellular region, a single transmembrane region, and a single intracytoplasmic catalytic domain, and thus represents a receptor-type PTP. The extracellular region contains eight fibronectin type III-like repeats and multiple N-glycosylation sites. The gene was shown to be expressed primarily in brain and liver, and at a lower level in heart and stomach. It was also found to be expressed in several cancer cell lines, but not in the corresponding normal tissues.[2]
References
↑Matozaki T, Suzuki T, Uchida T, Inazawa J, Ariyama T, Matsuda K, Horita K, Noguchi H, Mizuno H, Sakamoto C, et al. (Feb 1994). "Molecular cloning of a human transmembrane-type protein tyrosine phosphatase and its expression in gastrointestinal cancers". J Biol Chem. 269 (3): 2075–81. PMID8294459.
Noguchi T, Tsuda M, Takeda H, et al. (2001). "Inhibition of cell growth and spreading by stomach cancer-associated protein-tyrosine phosphatase-1 (SAP-1) through dephosphorylation of p130cas". J. Biol. Chem. 276 (18): 15216–24. doi:10.1074/jbc.M007208200. PMID11278335.
Marneros AG, Mehenni H, Reichenberger E, et al. (2001). "Gene for the human transmembrane-type protein tyrosine phosphatase H (PTPRH): genomic structure, fine-mapping and its exclusion as a candidate for Peutz-Jeghers syndrome". Cytogenet. Cell Genet. 92 (3–4): 213–6. doi:10.1159/000056905. PMID11435690.
Takada T, Noguchi T, Inagaki K, et al. (2002). "Induction of apoptosis by stomach cancer-associated protein-tyrosine phosphatase-1". J. Biol. Chem. 277 (37): 34359–66. doi:10.1074/jbc.M206541200. PMID12101188.
Nagano H, Noguchi T, Inagaki K, et al. (2003). "Downregulation of stomach cancer-associated protein tyrosine phosphatase-1 (SAP-1) in advanced human hepatocellular carcinoma". Oncogene. 22 (30): 4656–63. doi:10.1038/sj.onc.1206588. PMID12879010.
Pasquali C, Curchod ML, Wälchli S, et al. (2004). "Identification of protein tyrosine phosphatases with specificity for the ligand-activated growth hormone receptor". Mol. Endocrinol. 17 (11): 2228–39. doi:10.1210/me.2003-0011. PMID12907755.
Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID14702039.
