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Updated: Jun 18, 2026

Meiotic Spindle Assessment in Mouse Oocytes by siRNA-mediated Silencing
Published on: October 11, 2015
Meiosis I is established through division-specific translational control of a cyclin
Thomas M Carlile1, Angelika Amon
1Center for Cancer Research, Massachusetts Institute of Technology, E17-233, 40 Ames Street, Cambridge, MA 02139, USA.
Abstract:
In budding yeast, key meiotic events such as DNA replication, recombination, and the meiotic divisions are controlled by Clb cyclin-dependent kinases (Clb-CDKs). Using a novel synchronization procedure, we have characterized the activity of these Clb-CDKs and observed a surprising diversity in their regulation during the meiotic divisions. Clb1-CDK activity is restricted to meiosis I, and Clb3-CDK activity to meiosis II, through 5'UTR-mediated translational control of its transcript. The analysis of cells inappropriately producing Clb3-CDKs during meiosis I furthermore defines Clb3 as an inhibitor of the meiosis I chromosome segregation program. Our results demonstrate an essential role for Clb-CDK regulation in establishing the meiotic chromosome segregation pattern.
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