Timing of cyclin D1 expression within G1 phase is controlled by Rho

Catherine F. Welsh, Kristin Roovers, Jessie Villanueva, Yun Qi Liu, Martin A. Schwartz, Richard K. Assoian

Research output: Contribution to journalArticlepeer-review

262 Scopus citations


The expression of cyclin D1 in mid-G1 phase is associated with sustained ERK activity, and we show here that Rho is required for the sustained ERK signal. However, we also report that Rho inhibits an alternative Rac/Cdc42-dependent pathway, which results in a strikingly early G1-phase expression of cyclin D1. Thus, cyclin D1 is induced in mid-G1 phase because a Rho switch couples its expression to sustained ERK activity rather than Rac and Cdc42. Our results show that Rho is crucial for maintaining the correct timing of cyclin D1 expression in G1 phase and describe a new role for cytoskeletal integrity in the regulation of cell cycle progression.

Original languageEnglish (US)
Pages (from-to)950-957
Number of pages8
JournalNature Cell Biology
Issue number11
StatePublished - 2001

ASJC Scopus subject areas

  • Cell Biology


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