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Sororin actively maintains sister chromatid cohesion
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2016 (English)In: EMBO Journal, ISSN 0261-4189, E-ISSN 1460-2075, Vol. 35, no 6, p. 635-653Article in journal (Refereed) Published
Abstract [en]

Cohesion between sister chromatids is established during DNA replication but needs to be maintained to enable proper chromosome-spindle attachments in mitosis or meiosis. Cohesion is mediated by cohesin, but also depends on cohesin acetylation and sororin. Sororin contributes to cohesion by stabilizing cohesin on DNA. Sororin achieves this by inhibiting WAPL, which otherwise releases cohesin from DNA and destroys cohesion. Here we describe mouse models which enable the controlled depletion of sororin by gene deletion or auxin-induced degradation. We show that sororin is essential for embryonic development, cohesion maintenance, and proper chromosome segregation. We further show that the acetyltransferases ESCO1 and ESCO2 are essential for stabilizing cohesin on chromatin, that their only function in this process is to acetylate cohesin's SMC3 subunit, and that DNA replication is also required for stable cohesin-chromatin interactions. Unexpectedly, we find that sororin interacts dynamically with the cohesin complexes it stabilizes. This implies that sororin recruitment to cohesin does not depend on the DNA replication machinery or process itself, but on a property that cohesin acquires during cohesion establishment.

Place, publisher, year, edition, pages
2016. Vol. 35, no 6, p. 635-653
Keywords [en]
cell cycle, cohesin acetylation, mitosis, sister chromatid cohesion
National Category
Cell Biology
Identifiers
URN: urn:nbn:se:umu:diva-156766DOI: 10.15252/embj.201592532PubMedID: 26903600OAI: oai:DiVA.org:umu-156766DiVA, id: diva2:1291969
Available from: 2019-02-26 Created: 2019-02-26 Last updated: 2019-03-08Bibliographically approved

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Cisneros, David A.

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