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A Genome-Wide Screen Identifies Genes Required for Centromeric Cohesion

2004; American Association for the Advancement of Science; Volume: 303; Issue: 5662 Linguagem: Inglês

10.1126/science.1094220

1095-9203

Adèle L. Marston, Wai‐Hong Tham, Hiral Shah, Angelika Amon,

Genomics and Chromatin Dynamics

During meiosis, two chromosome segregation phases follow a single round of DNA replication. We identified factors required to establish this specialized cell cycle by examining meiotic chromosome segregation in a collection of yeast strains lacking all nonessential genes. This analysis revealed Sgo1, Chl4, and Iml3 to be important for retaining centromeric cohesin until the onset of anaphase II. Consistent with this role, Sgo1 localizes to centromeric regions but dissociates at the onset of anaphase II. The screen described here provides a comprehensive analysis of the genes required for the meiotic cell cycle and identifies three factors important for the stepwise loss of sister chromatid cohesion.