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Meiosis I is established through division-specific translational control of a cyclin.

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.

SUBMITTER: Carlile TM

PROVIDER: S-EPMC2396536 | biostudies-literature | 2008 Apr

REPOSITORIES: biostudies-literature

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Meiosis I is established through division-specific translational control of a cyclin.

Carlile Thomas M TM Amon Angelika A

Cell 20080401 2

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 analysi ...[more]

PMID: 18423199

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