| Literature DB >> 27655914 |
Dongmei Zhang1,2, M Caleb Marlin2, Zhimin Liang2, Mohiuddin Ahmad3, Nicole M Ashpole4, William E Sonntag4, Zhizhuang Joe Zhao5,6, Guangpu Li7,6.
Abstract
Protein tyrosine phosphatase MEG2 (PTP-MEG2) is a unique nonreceptor tyrosine phosphatase associated with transport vesicles, where it facilitates membrane trafficking by dephosphorylation of the N-ethylmaleimide-sensitive fusion factor. In this study, we identify the neurotrophin receptor TrkA as a novel cargo whose transport to the cell surface requires PTP-MEG2 activity. In addition, TrkA is also a novel substrate of PTP-MEG2, which dephosphorylates both Tyr-490 and Tyr-674/Tyr-675 of TrkA. As a result, overexpression of PTP-MEG2 down-regulates NGF/TrkA signaling and blocks neurite outgrowth and differentiation in PC12 cells and cortical neurons.Entities:
Keywords: PTP-MEG2; PTPN9; TrkA; autophosphorylation; membrane trafficking; neuron; receptor tyrosine kinase; tyrosine-protein phosphatase (tyrosine phosphatase)
Mesh:
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Year: 2016 PMID: 27655914 PMCID: PMC5104914 DOI: 10.1074/jbc.M116.728550
Source DB: PubMed Journal: J Biol Chem ISSN: 0021-9258 Impact factor: 5.157