Receptor-type tyrosine-protein phosphatase F is an enzyme that in humans is encoded by the PTPRFgene.
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 two tandem intracytoplasmic catalytic domains, and thus represents a receptor-type PTP. The extracellular region contains three Ig-like domains, and nine non-Ig like domains similar to that of neural cell adhesion molecule. This PTP was shown to function in the regulation of epithelial cell–cell contacts at adherens junctions, as well as in the control of beta-catenin signaling. An increased expression level of this protein was found in the insulin-responsive tissue of obese, insulin-resistant individuals, and may contribute to the pathogenesis of insulin resistance. Two alternatively spliced transcript variants of this gene, which encode distinct proteins, have been reported.
↑Harder KW, Saw J, Miki N, Jirik F (Nov 1995). "Coexisting amplifications of the chromosome 1p32 genes (PTPRF and MYCL1) encoding protein tyrosine phosphatase LAR and L-myc in a small cell lung cancer line". Genomics. 27 (3): 552–3. doi:10.1006/geno.1995.1092. PMID7558042.
↑Bonvini P, An WG, Rosolen A, Nguyen P, Trepel J, Garcia de Herreros A, Dunach M, Neckers LM (Feb 2001). "Geldanamycin abrogates ErbB2 association with proteasome-resistant beta-catenin in melanoma cells, increases beta-catenin-E-cadherin association, and decreases beta-catenin-sensitive transcription". Cancer Res. 61 (4): 1671–7. PMID11245482.
↑Serra-Pagès C, Medley QG, Tang M, Hart A, Streuli M (Jun 1998). "Liprins, a family of LAR transmembrane protein-tyrosine phosphatase-interacting proteins". J. Biol. Chem. 273 (25): 15611–20. doi:10.1074/jbc.273.25.15611. PMID9624153.
Hashimoto N, Feener EP, Zhang WR, Goldstein BJ (1992). "Insulin receptor protein-tyrosine phosphatases. Leukocyte common antigen-related phosphatase rapidly deactivates the insulin receptor kinase by preferential dephosphorylation of the receptor regulatory domain". J. Biol. Chem. 267 (20): 13811–4. PMID1321126.
Jirik FR, Harder KW, Melhado IG, Anderson LL, Duncan AM (1993). "The gene for leukocyte antigen-related tyrosine phosphatase (LAR) is localized to human chromosome 1p32, a region frequently deleted in tumors of neuroectodermal origin". Cytogenet. Cell Genet. 61 (4): 266–8. doi:10.1159/000133418. PMID1486801.
O'Grady P, Krueger NX, Streuli M, Saito H (1994). "Genomic organization of the human LAR protein tyrosine phosphatase gene and alternative splicing in the extracellular fibronectin type-III domains". J. Biol. Chem. 269 (40): 25193–9. PMID7929208.
Liu X, Vega QC, Decker RA, Pandey A, Worby CA, Dixon JE (1996). "Oncogenic RET receptors display different autophosphorylation sites and substrate binding specificities". J. Biol. Chem. 271 (10): 5309–12. doi:10.1074/jbc.271.10.5309. PMID8621380.
Zhang WR, Li PM, Oswald MA, Goldstein BJ (1996). "Modulation of insulin signal transduction by eutopic overexpression of the receptor-type protein-tyrosine phosphatase LAR". Mol. Endocrinol. 10 (5): 575–84. doi:10.1210/me.10.5.575. PMID8732688.
Tabiti K, Cui L, Chhatwal VJ, Moochhala S, Ngoi SS, Pallen CJ (1996). "Novel alternative splicing predicts a secreted extracellular isoform of the human receptor-like protein tyrosine phosphatase LAR". Gene. 175 (1–2): 7–13. doi:10.1016/0378-1119(96)00113-8. PMID8917069.
Ahmad F, Goldstein BJ (1997). "Functional association between the insulin receptor and the transmembrane protein-tyrosine phosphatase LAR in intact cells". J. Biol. Chem. 272 (1): 448–57. doi:10.1074/jbc.272.1.448. PMID8995282.
Serra-Pagès C, Medley QG, Tang M, Hart A, Streuli M (1998). "Liprins, a family of LAR transmembrane protein-tyrosine phosphatase-interacting proteins". J. Biol. Chem. 273 (25): 15611–20. doi:10.1074/jbc.273.25.15611. PMID9624153.
Chiplunkar S, Chamblis K, Chwa M, Rosenberg S, Kenney MC, Brown DJ (1999). "Enhanced expression of a transmembrane phosphotyrosine phosphatase (LAR) in keratoconus cultures and corneas". Exp. Eye Res. 68 (3): 283–93. doi:10.1006/exer.1998.0604. PMID10079136.