Cyclin A2 Is Required for Sister Chromatid Segregation, But Not Separase Control, in Mouse Oocyte Meiosis

Title data

Touati, Sandra A. ; Cladière, Damien ; Lister, Lisa M. ; Leontiou, Ioanna ; Chambon, Jean-Philippe ; Rattani, Ahmed ; Böttger, Franziska ; Stemmann, Olaf ; Nasmyth, Kim ; Herbert, Mary ; Wassermann, Katja:
Cyclin A2 Is Required for Sister Chromatid Segregation, But Not Separase Control, in Mouse Oocyte Meiosis.
In: Cell Reports. Vol. 2 (29 November 2012) Issue 5 . - pp. 1077-1087.
ISSN 2211-1247
DOI: https://doi.org/10.1016/j.celrep.2012.10.002

Official URL:

Abstract in another language

In meiosis, two specialized cell divisions allow the separation of paired chromosomes first, then of sister chromatids. Separase removes the cohesin complex holding sister chromatids together in a stepwise manner from chromosome arms in meiosis I, then from the centromere region in meiosis II. Using mouse oocytes, our study reveals that cyclin A2 promotes entry into meiosis, as well as an additional unexpected role; namely, its requirement for separase-dependent sister chromatid separation in meiosis II. Untimely cyclin A2-associated kinase activity in meiosis I leads to precocious sister separation, whereas inhibition of cyclin A2 in meiosis II prevents it. Accordingly, endogenous cyclin A is localized to kinetochores throughout meiosis II, but not in anaphase I. Additionally, we found that cyclin B1, but not cyclin A2, inhibits separase in meiosis I. These findings indicate that separase-dependent cohesin removal is differentially regulated by cyclin B1 and A2 in mammalian meiosis.

Copyright © 2012 The Authors. Published by Elsevier Inc. All rights reserved.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Genetics > Chair Genetics - Univ.-Prof. Dr. Olaf Stemmann Profile Fields > Advanced Fields > Molecular Biosciences Research Institutions > Research Centres > Bayreuth Center for Molecular Biosciences - BZMB Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Genetics Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Research Centres
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 570 Life sciences, biology
Date Deposited:	26 Mar 2015 08:10
Last Modified:	18 Apr 2018 08:53
URI:	https://eref.uni-bayreuth.de/id/eprint/8386