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裂殖酵母中通过独特机制建立和维持姐妹染色单体黏连。

Establishment and maintenance of sister chromatid cohesion in fission yeast by a unique mechanism.

作者信息

Tanaka K, Hao Z, Kai M, Okayama H

机构信息

Department of Biochemistry and Molecular Biology, The University of Tokyo, Graduate School of Medicine, Bunkyo-ku, Tokyo 113-0033, Japan.

出版信息

EMBO J. 2001 Oct 15;20(20):5779-90. doi: 10.1093/emboj/20.20.5779.

Abstract

During S phase, chromatid cohesion is established only between nascent sisters and with faithful pairing along their entire region, but how this is ensured is unknown. Here we report that sister chromatid cohesion is formed and maintained by a unique mechanism. In fission yeast, Eso1p, functioning in close coupling to DNA replication, establishes sister chromatid cohesion whereas the newly identified Cohesin-associated protein Pds5p hinders the establishment of cohesion until counteracted by Eso1p, yet stabilizes cohesion once it is established. Eso1p interacts physically with Pds5p via its Ctf7p/Eco1p-homologous domain.

摘要

在S期,染色单体黏连仅在新生姐妹染色单体之间建立,并沿其整个区域进行精确配对,但如何确保这一点尚不清楚。在此我们报告,姐妹染色单体黏连是通过一种独特机制形成并维持的。在裂殖酵母中,与DNA复制紧密偶联发挥作用的Eso1p建立姐妹染色单体黏连,而新发现的黏连蛋白相关蛋白Pds5p会阻碍黏连的建立,直到被Eso1p抵消,但一旦黏连建立,它会使黏连稳定下来。Eso1p通过其Ctf7p/Eco1p同源结构域与Pds5p发生物理相互作用。

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