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Cyclin E2 induces genomic instability by mechanisms distinct from cyclin E1


Cyclins E1 drives the initiation of DNA replication, and deregulation of its periodic expression leads to mitotic delay associated with genomic instability. Since it is not known whether the closely related protein cyclin E2 shares these properties, we overexpressed cyclin E2 in breast cancer cells. This did not affect the duration of mitosis, nor did it cause an increase in p107 association with CDK2. In contrast, cyclin E1 overexpression led to inhibition of the APC complex, prolonged metaphase and increased p107 association with CDK2. Despite these different effects on the cell cycle, elevated levels of either cyclin E1 or E2 led to hallmarks of genomic instability, i.e., an increased proportion of abnormal mitoses, micronuclei and chromosomal aberrations. Cyclin E2 induction of genomic instability by a mechanism distinct from cyclin E1 indicates that these two proteins have unique functions in a cancer setting.

Type Journal
Authors Caldon, C.E.; Sergio, C.M.; Burgess, A.; Deans, A.J.; Sutherland, R.L.; Musgrove, E.A.;
Responsible Garvan Author A/Prof Liz Caldon
Publisher Name CELL CYCLE
Published Date 2013-02-15
Published Volume 12
Published Issue 4
Published Pages 606-617
Status Published in-print
DOI 10.4161/cc.23512
OpenAccess link to author's accepted manuscript version