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ID 115422
Author
Kawai, Hidehiko Hiroshima University
Ruppert, Jan University of Edinburgh
Earnshaw, William C. University of Edinburgh
Pagano, Michele New York University
Keywords
Chromosome passenger complex
Borealin
Aurora B
Ubiquitylation
APC/CCdh1
Content Type
Journal Article
Description
During mitosis, the chromosomal passenger complex (CPC) ensures the faithful transmission of the genome. The CPC is composed of the enzymatic component Aurora B (AURKB) and the three regulatory and targeting components borealin, INCENP, and survivin (also known as BIRC5). Although the CPC is known to be involved in diverse mitotic events, it is still unclear how CPC function terminates after mitosis. Here we show that borealin is ubiquitylated by the anaphase promoting complex/cyclosome (APC/C) and its cofactor Cdh1 (also known as FZR1) and is subsequently degraded in G1 phase. Cdh1 binds to regions within the N terminus of borealin that act as a non-canonical degron. Aurora B has also been shown previously to be degraded by the APC/CCdh1 from late mitosis to G1. Indeed, Cdh1 depletion sustains an Aurora B activity with stable levels of borealin and Aurora B throughout the cell cycle, and causes reduced efficiency of DNA replication after release from serum starvation. Notably, inhibition of Aurora B kinase activity improves the efficiency of DNA replication in Cdh1-depleted cells. We thus propose that APC/CCdh1 terminates CPC activity upon mitotic exit and thereby contributes to proper control of DNA replication.
Journal Title
Journal of Cell Science
ISSN
00219533
14779137
NCID
AA00694823
AA11720335
Publisher
The Company of Biologists
Volume
133
Issue
18
Start Page
jcs251314
Published Date
2020-09-15
Rights
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
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language
eng
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departments
Medical Sciences
Oral Sciences