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Originally published in Science Express on 29 January 2004
Science 27 February 2004:
Vol. 303. no. 5662, pp. 1367 - 1370
DOI: 10.1126/science.1094220
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Reports

A Genome-Wide Screen Identifies Genes Required for Centromeric Cohesion

Adele L. Marston, Wai-Hong Tham, Hiral Shah, Angelika Amon*

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.

Center for Cancer Research, Howard Hughes Medical Institute, Massachusetts Institute of Technology, E17-233, 40 Ames Street, Cambridge, MA 02139, USA.

* To whom correspondence should be addressed. E-mail: angelika{at}mit.edu

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