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. Two alternatively spliced transcript variants of this gene have been reported, one of which encodes a receptor-type PTP that possesses a short extracellular domain, a single transmembrane region, and two tandem intracytoplasmic catalytic domains; Another one encodes a PTP that contains a distinct hydrophilic N-terminus, and thus represents a nonreceptor-type isoform of this PTP. Studies of the similar gene in mice suggested the regulatory roles of this PTP in RAS related signal transduction pathways, cytokines induced SATA signaling, as well as the activation of voltage-gated K+ channels.[2]
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Toledano-Katchalski H, Elson A (1999). "The transmembranal and cytoplasmic forms of protein tyrosine phosphatase epsilon physically associate with the adaptor molecule Grb2". Oncogene. 18 (36): 5024–31. doi:10.1038/sj.onc.1202883. PMID10490839.
Tanuma N, Nakamura K, Shima H, Kikuchi K (2000). "Protein-tyrosine phosphatase PTPepsilon C inhibits Jak-STAT signaling and differentiation induced by interleukin-6 and leukemia inhibitory factor in M1 leukemia cells". J. Biol. Chem. 275 (36): 28216–21. doi:10.1074/jbc.M003661200. PMID10859312.
Gil-Henn H, Volohonsky G, Toledano-Katchalski H, Gandre S, Elson A (2000). "Generation of novel cytoplasmic forms of protein tyrosine phosphatase epsilon by proteolytic processing and translational control". Oncogene. 19 (38): 4375–84. doi:10.1038/sj.onc.1203790. PMID10980613.
Wabakken T, Hauge H, Finne EF, Wiedlocha A, Aasheim H (2002). "Expression of human protein tyrosine phosphatase epsilon in leucocytes: a potential ERK pathway-regulating phosphatase". Scand. J. Immunol. 56 (2): 195–203. doi:10.1046/j.1365-3083.2002.01126.x. PMID12121439.
Wabakken T, Hauge H, Funderud S, Aasheim HC (2002). "Characterization, expression and functional aspects of a novel protein tyrosine phosphatase epsilon isoform". Scand. J. Immunol. 56 (3): 276–85. doi:10.1046/j.1365-3083.2002.01127.x. PMID12193229.
Blanchetot C, Tertoolen LG, Overvoorde J, den Hertog J (2003). "Intra- and intermolecular interactions between intracellular domains of receptor protein-tyrosine phosphatases". J. Biol. Chem. 277 (49): 47263–9. doi:10.1074/jbc.M205810200. PMID12376545.
Tiran Z, Peretz A, Attali B, Elson A (2003). "Phosphorylation-dependent regulation of Kv2.1 Channel activity at tyrosine 124 by Src and by protein-tyrosine phosphatase epsilon". J. Biol. Chem. 278 (19): 17509–14. doi:10.1074/jbc.M212766200. PMID12615930.
Toledano-Katchalski H, Kraut J, Sines T, Granot-Attas S, Shohat G, Gil-Henn H, Yung Y, Elson A (2004). "Protein tyrosine phosphatase epsilon inhibits signaling by mitogen-activated protein kinases". Mol. Cancer Res. 1 (7): 541–50. PMID12754301.