期刊
GENES & DEVELOPMENT
卷 20, 期 21, 页码 2973-2984出版社
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.1468806
关键词
condensin complex; cohesin complex; sister chromatid cohesion; chromosome segregation; mitotic chromosome structure
We describe a novel requirement for the condensin complex in sister chromatid cohesion in Saccharomyces cerevisiae. Strikingly, condensin-dependent cohesion can be distinguished from cohesin-based pairing by a number of criteria. First, condensin is required to maintain cohesion at several chromosomal arm sites but, in contrast to cohesin, is not required at either centromere or telomere-proximal loci. Second, condensin-dependent interlinks are established during mitosis independently of DNA replication and are reversible within a single cell cycle. Third, the loss of condensin-dependent linkages occurs without affecting cohesin levels at the separated URA3 locus. We propose that, during mitosis, robust sister chromatid cohesion along chromosome arms requires both condensin- and cohesin- dependent mechanisms, which function independently of each other. We discuss the implications of our results for current models of sister chromatid cohesion.
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