A model for phospho-caveolin-1 driven turnover of focal adhesions

Micha Nethe*, Peter L. Hordijk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The regulation of Focal Adhesion (FA) dynamics is a key aspect of cellular motility. FAs concentrate integrins and associated cytoskeletal elements as well as a large number of regulatory proteins, including adapters, kinases and small GtPases of the rho Family. We have recently shown that activated rac1 can localize to FAs and can initiate the accumulation of the adapter protein Caveolin1 (Cav1) at FAs. As reported by several groups including ours, this translocation requires Cav1 phosphorylation at tyr14, presumably by Src. here we provide additional data regarding this process and briefly review recent literature. Finally, we incorporated the different pieces of available information into a mechanistic model. this model proposes that local rac1 activation initiates a series of events that involve endosomal traffic of Cav1 and Src, targeting these proteins to or near FAs. next, within specific membrane domains, Src can mediate the phosphorylation of Cav1 at tyr 14, which is important for the stable FA localization of Cav1. Finally, dephosphorylation of Cav1 may represent a key step required for internalization, FA turnover and cell motility.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalCell Adhesion and Migration
Volume5
Issue number1
DOIs
Publication statusPublished - 1 Jan 2011

Cite this