Abstract
Although the PR-Set7/Set8/KMT5a histone H4 Lys 20 monomethyltransferase (H4K20me1) plays an essential role in mammalian cell cycle progression, especially during G2/M, it remained unknown how PR-Set7 itself was regulated. In this study, we discovered the mechanisms that govern the dynamic regulation of PR-Set7 during mitosis, and that perturbation of these pathways results in defective mitotic progression. First, we found that PR-Set7 is phosphorylated at Ser 29 (S29) specifically by the cyclin-dependent kinase 1 (cdk1)/cyclinB complex, primarily from prophase through early anaphase, subsequent to global accumulation of H4K20me1. While S29 phosphorylation did not affect PR-Set7 methyltransferase activity, this event resulted in the removal of PR-Set7 from mitotic chromosomes. S29 phosphorylation also functions to stabilize PR-Set7 by directly inhibiting its interaction with the anaphase-promoting complex (APC), an E3 ubiquitin ligase. The dephosphorylation of S29 during late mitosis by the Cdc14 phosphatases was required for APCcdh1-mediated ubiquitination of PR-Set7 and subsequent proteolysis. This event is important for proper mitotic progression, as constitutive phosphorylation of PR-Set7 resulted in a substantial delay between metaphase and anaphase. Collectively, we elucidated the molecular mechanisms that control PR-Set7 protein levels during mitosis, and demonstrated that its orchestrated regulation is important for normal mitotic progression.
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Dates
Type | When |
---|---|
Created | 14 years, 10 months ago (Oct. 21, 2010, 11:04 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 16, 2021, 12:34 p.m.) |
Indexed | 1 month, 1 week ago (July 22, 2025, 6:34 a.m.) |
Issued | 14 years, 10 months ago (Oct. 21, 2010) |
Published | 14 years, 10 months ago (Oct. 21, 2010) |
Published Online | 14 years, 10 months ago (Oct. 21, 2010) |
Published Print | 14 years, 9 months ago (Nov. 15, 2010) |
@article{Wu_2010, title={Dynamic regulation of the PR-Set7 histone methyltransferase is required for normal cell cycle progression}, volume={24}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.1984210}, DOI={10.1101/gad.1984210}, number={22}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Wu, Shumin and Wang, Weiping and Kong, Xiangduo and Congdon, Lauren M. and Yokomori, Kyoko and Kirschner, Marc W. and Rice, Judd C.}, year={2010}, month=oct, pages={2531–2542} }