DEPDC1B coordinates de-adhesion events and cell-cycle progression at mitosis

Stefano Marchesi, Francesca Montani, Gianluca Deflorian, Rocco D'Antuono, Alessandro Cuomo, Serena Bologna, Carmela Mazzoccoli, Tiziana Bonaldi, PierPaolo DiFiore, Francesco Nicassio

Research output: Contribution to journalArticle

Abstract

Cells entering mitosis become rounded, lose attachment to the substrate, and increase their cortical rigidity. Pivotal to these events is the dismantling of focal adhesions (FAs). How mitotic reshaping is linked to commitment to divide is unclear. Here, we show that DEPDC1B, a protein that accumulates in G2, coordinates de-adhesion events and cell-cycle progression at mitosis. DEPDC1B functions as an inhibitor of a RhoA-based signaling complex, which assembles on the FA-associated protein tyrosine phosphatase, receptor type, F (PTPRF) and mediates the integrity of FAs. By competing with RhoA for theinteraction with PTPRF, DEPDC1B promotes the dismantling of FAs, which is necessary for the morphological changes preceding mitosis. The circuitry is relevant in whole organisms, as shown by the control exerted by the DEPDC1B/RhoA/PTPRF axis on mitotic dynamics during zebrafish development. Our results uncover an adhesion-dependent signaling mechanism that coordinates adhesion events with the control of cell-cycle progression.

Original languageEnglish
Pages (from-to)420-433
Number of pages14
JournalDevelopmental Cell
Volume31
Issue number4
DOIs
Publication statusPublished - Nov 24 2014

ASJC Scopus subject areas

  • Developmental Biology

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