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XB-ART-57209
Mol Cell 2020 Apr 02;781:127-140.e7. doi: 10.1016/j.molcel.2020.01.023.
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Cohesin Removal Reprograms Gene Expression upon Mitotic Entry.

Perea-Resa C , Bury L , Cheeseman IM , Blower MD .


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As cells enter mitosis, the genome is restructured to facilitate chromosome segregation, accompanied by dramatic changes in gene expression. However, the mechanisms that underlie mitotic transcriptional regulation are unclear. In contrast to transcribed genes, centromere regions retain transcriptionally active RNA polymerase II (Pol II) in mitosis. Here, we demonstrate that chromatin-bound cohesin is necessary to retain elongating Pol II at centromeres. We find that WAPL-mediated removal of cohesin from chromosome arms during prophase is required for the dissociation of Pol II and nascent transcripts, and failure of this process dramatically alters mitotic gene expression. Removal of cohesin/Pol II from chromosome arms in prophase is important for accurate chromosome segregation and normal activation of gene expression in G1. We propose that prophase cohesin removal is a key step in reprogramming gene expression as cells transition from G2 through mitosis to G1.

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Species referenced: Xenopus laevis
Genes referenced: kidins220 wapl
GO keywords: G1/S transition of mitotic cell cycle [+]


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References [+] :
Akoulitchev, The molecular mechanism of mitotic inhibition of TFIIH is mediated by phosphorylation of CDK7. 1998, Pubmed