Receptor-type tyrosine-protein phosphatase S, also known as R-PTP-S, R-PTP-sigma, or PTPσ, is an enzyme that in humans is encoded by the PTPRSgene.[5][6][7]
Function
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 contains an extracellular region, a single transmembrane segment and two tandem intracytoplasmic catalytic domains (D1 and D2), and thus represents a receptor-type PTP. D1 is catalytically active, while D2 is catalytically inactive. The extracellular region of this protein is composed of multiple Ig-like and fibronectin type III-like domains. Rem2 signaling affects neuronal structure and function in part by regulation of gene expression. Molecular and Cellular NeuroscienceStudies of the similar gene in mice suggested that this PTP may be involved in cell-cell interaction, primary axonogenesis, and axon guidance during embryogenesis. This PTP has been also implicated in the molecular control of adult nerve repair. Four alternatively spliced transcript variants, which encode distinct proteins, have been reported.[7]
Clinical significance
A PTPRS protein mimetic may improve muscular and bladder control in rats with spinal cord injuries.[8][9]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Wagner J, Gordon LA, Heng HH, Tremblay ML, Olsen AS (Mar 1997). "Physical mapping of receptor type protein tyrosine phosphatase sigma (PTPRS) to human chromosome 19p13.3". Genomics. 38 (1): 76–8. doi:10.1006/geno.1996.0594. PMID8954782.
^Hamasaki H, Fujitani M, Yamashita T (March 2016). "NME2 associates with PTPσ to transduce signals from chondroitin sulfate proteoglycans". Biochemical and Biophysical Research Communications. 471 (4): 522–7. doi:10.1016/j.bbrc.2016.02.042. PMID26896769.
Further reading
Adachi M, Sekiya M, Arimura Y, Takekawa M, Itoh F, Hinoda Y, Imai K, Yachi A (1992). "Protein-tyrosine phosphatase expression in pre-B cell NALM-6". Cancer Res. 52 (3): 737–40. PMID1370651.
Endo N, Rutledge SJ, Opas EE, Vogel R, Rodan GA, Schmidt A (1997). "Human protein tyrosine phosphatase-sigma: alternative splicing and inhibition by bisphosphonates". J. Bone Miner. Res. 11 (4): 535–43. doi:10.1002/jbmr.5650110415. PMID8992885. S2CID84496716.
Norris K, Norris F, Kono DH, Vestergaard H, Pedersen O, Theofilopoulos AN, Møller NP (1997). "Expression of protein-tyrosine phosphatases in the major insulin target tissues". FEBS Lett. 415 (3): 243–8. doi:10.1016/S0014-5793(97)01133-2. PMID9357975. S2CID9414519.
Haworth K, Shu KK, Stokes A, Morris R, Stoker A (1998). "The expression of receptor tyrosine phosphatases is responsive to sciatic nerve crush". Mol. Cell. Neurosci. 12 (3): 93–104. doi:10.1006/mcne.1998.0707. PMID9790732. S2CID41195720.
Elchebly M, Wagner J, Kennedy TE, Lanctôt C, Michaliszyn E, Itié A, Drouin J, Tremblay ML (1999). "Neuroendocrine dysplasia in mice lacking protein tyrosine phosphatase sigma". Nat. Genet. 21 (3): 330–3. doi:10.1038/6859. PMID10080191. S2CID19356972.
Wallace MJ, Batt J, Fladd CA, Henderson JT, Skarnes W, Rotin D (1999). "Neuronal defects and posterior pituitary hypoplasia in mice lacking the receptor tyrosine phosphatase PTPsigma". Nat. Genet. 21 (3): 334–8. doi:10.1038/6866. PMID10080192. S2CID7889181.
Brandenberger R, Wei H, Zhang S, Lei S, Murage J, Fisk GJ, Li Y, Xu C, Fang R, Guegler K, Rao MS, Mandalam R, Lebkowski J, Stanton LW (2005). "Transcriptome characterization elucidates signaling networks that control human ES cell growth and differentiation". Nat. Biotechnol. 22 (6): 707–16. doi:10.1038/nbt971. PMID15146197. S2CID27764390.
Rual JF, Venkatesan K, Hao T, Hirozane-Kishikawa T, Dricot A, Li N, Berriz GF, Gibbons FD, Dreze M, Ayivi-Guedehoussou N, Klitgord N, Simon C, Boxem M, Milstein S, Rosenberg J, Goldberg DS, Zhang LV, Wong SL, Franklin G, Li S, Albala JS, Lim J, Fraughton C, Llamosas E, Cevik S, Bex C, Lamesch P, Sikorski RS, Vandenhaute J, Zoghbi HY, Smolyar A, Bosak S, Sequerra R, Doucette-Stamm L, Cusick ME, Hill DE, Roth FP, Vidal M (2005). "Towards a proteome-scale map of the human protein-protein interaction network". Nature. 437 (7062): 1173–8. Bibcode:2005Natur.437.1173R. doi:10.1038/nature04209. PMID16189514. S2CID4427026.
Lajus S, Lang J (2006). "Splice variant 3, but not 2 of receptor protein-tyrosine phosphatase sigma can mediate stimulation of insulin-secretion by alpha-latrotoxin". J. Cell. Biochem. 98 (6): 1552–9. doi:10.1002/jcb.20871. PMID16552719. S2CID84223719.
Ewing RM, Chu P, Elisma F, Li H, Taylor P, Climie S, McBroom-Cerajewski L, Robinson MD, O'Connor L, Li M, Taylor R, Dharsee M, Ho Y, Heilbut A, Moore L, Zhang S, Ornatsky O, Bukhman YV, Ethier M, Sheng Y, Vasilescu J, Abu-Farha M, Lambert JP, Duewel HS, Stewart II, Kuehl B, Hogue K, Colwill K, Gladwish K, Muskat B, Kinach R, Adams SL, Moran MF, Morin GB, Topaloglou T, Figeys D (2007). "Large-scale mapping of human protein-protein interactions by mass spectrometry". Mol. Syst. Biol. 3 (1): 89. doi:10.1038/msb4100134. PMC1847948. PMID17353931.
PDB gallery
2fh7: Crystal structure of the phosphatase domains of human PTP SIGMA