c-Src-mediated phosphorylation of TRIP6 regulates its function in lysophosphatidic acid-induced cell migration

Yun Ju Lai, Chen Shan Chen, Weei Chin Lin, Fang Tsyr Lin*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

50 引文 斯高帕斯(Scopus)

摘要

TRIP6 (thyroid receptor-interacting protein 6), also known as ZRP-1 (zyxin-related protein 1), is a member of the zyxin family that has been implicated in cell motility. Previously we have shown that TRIP6 binds to the LPA2 receptor and associates with several components of focal complexes in an agonist-dependent manner and, thus, enhances lysophosphatidic acid (LPA)-induced cell migration. Here we further report that the function of TRIP6 in LPA signaling is regulated by c-Src-mediated phosphorylation of TRIP6 at the Tyr-55 residue. LPA stimulation induces tyrosine phosphorylation of endogenous TRIP6 in NIH 3T3 cells and c-Src-expressing fibroblasts, which is virtually eliminated in Src-null fibroblasts. Strikingly, both phosphotyrosine-55 and proline-58 residues of TRIP6 are required for Crk binding in vitro and in cells. Mutation of Tyr-55 to Phe does not alter the ability of TRIP6 to localize at focal adhesions or associate with actin. However, it abolishes the association of TRJP6 with Crk and p130cas in cells and significantly reduces the function of TRIP6 to promote LPA-induced ERK activation. Ultimately, these signaling events control TRIP6 function in promoting LPA-induced morphological changes and cell migration.

原文英語
頁(從 - 到)5859-5868
頁數10
期刊Molecular and cellular biology
25
發行號14
DOIs
出版狀態已發佈 - 2005 七月

ASJC Scopus subject areas

  • 分子生物學
  • 細胞生物學

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