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Meiotic Dna Re-Replication And The Recombination Checkpoint, Nicole Ann Najor
Meiotic Dna Re-Replication And The Recombination Checkpoint, Nicole Ann Najor
Wayne State University Dissertations
Progression through meiosis occurs through a strict sequence of events, so that one round of DNA replication precedes programmed recombination and two nuclear divisions. Cyclin dependent kinase 1 (Cdk1) is required for meiosis, and any disruption in its activity leads to meiotic defects. The Cdk1 inhibitor, Sic1, regulates the G1-S transition in the mitotic cell cycle and the analogous transition in meiosis. We have employed a form of Sic1, Sic1deltaPHA, that is mutated at multiple phosphorylation sites and resistant to degradation. Meiosis specific expression of Sic1deltaPHA disrupts Cdk1 activity and leads to significant accumulation of over replicated …