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Regulation of synaptojanin 2 5'-phosphatase activity by Src.


ABSTRACT: Synaptojanin 2 (SYNJ2) is a phosphatidylinositol (PI) phosphatase that controls two distinct functions, clathrin-mediated endocytosis and tumor cell invadopodia formation and invasion. Here, we identify a number of novel SYNJ2 binding partners, several of which have previously been shown to be necessary for invadopodia formation or clathrin-mediated endocytosis. We focus on Src family kinases. We found that Src phosphorylates SYNJ2 on Tyr ( 490) , thereby stimulating SYNJ2 5'-phosphatase activity in vitro. We also provide evidence that Src-mediated phosphorylation of SYNJ2 contributes to invadopodia formation.

SUBMITTER: Chuang Y 

PROVIDER: S-EPMC3547897 | biostudies-literature | 2012 Nov-Dec

REPOSITORIES: biostudies-literature

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Regulation of synaptojanin 2 5'-phosphatase activity by Src.

Chuang Yayu Y   Xu Xiaonan X   Kwiatkowska Aneta A   Tsapraillis George G   Hwang Hyonson H   Petritis Konstantinos K   Flynn Dan D   Symons Marc M  

Cell adhesion & migration 20121017 6


Synaptojanin 2 (SYNJ2) is a phosphatidylinositol (PI) phosphatase that controls two distinct functions, clathrin-mediated endocytosis and tumor cell invadopodia formation and invasion. Here, we identify a number of novel SYNJ2 binding partners, several of which have previously been shown to be necessary for invadopodia formation or clathrin-mediated endocytosis. We focus on Src family kinases. We found that Src phosphorylates SYNJ2 on Tyr ( 490) , thereby stimulating SYNJ2 5'-phosphatase activit  ...[more]

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