Characterization of a DNA exit gate in the human cohesin ring

Pim J. Huis In't Veld, Franz Herzog, Rene Ladurner, Iain F. Davidson, Sabina Piric, Emanuel Kreidl, Venugopal Bhaskara, Ruedi Aebersold, Jan Michael Peters

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

Abstract

Chromosome segregation depends on sister chromatid cohesion mediated by cohesin. The cohesin subunits Smc1, Smc3, and Scc1 form tripartite rings that are thought to open at distinct sites to allow entry and exit of DNA. However, direct evidence for the existence of open forms of cohesin is lacking. We found that cohesin's proposed DNA exit gate is formed by interactions between Scc1 and the coiled-coil region of Smc3. Mutation of this interface abolished cohesin's ability to stably associate with chromatin and to mediate cohesion. Electron microscopy revealed that weakening of the Smc3-Scc1 interface resulted in opening of cohesin rings, as did proteolytic cleavage of Scc1. These open forms may resemble intermediate states of cohesin normally generated by the release factor Wapl and the protease separase, respectively.

OriginalspracheEnglisch
Seiten (von - bis)968-972
Seitenumfang5
FachzeitschriftScience
Jahrgang346
Ausgabenummer6212
DOIs
PublikationsstatusVeröffentlicht - 21 Nov. 2014
Extern publiziertJa

Fingerprint

Untersuchen Sie die Forschungsthemen von „Characterization of a DNA exit gate in the human cohesin ring“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren