Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
XB-ART-42273
Mol Cell 2010 Oct 08;401:22-33. doi: 10.1016/j.molcel.2010.09.015.
Show Gene links Show Anatomy links

CRL4(Cdt2)-mediated destruction of the histone methyltransferase Set8 prevents premature chromatin compaction in S phase.

Centore RC, Havens CG, Manning AL, Li JM, Flynn RL, Tse A, Jin J, Dyson NJ, Walter JC, Zou L.


???displayArticle.abstract???
The proper coordination between DNA replication and mitosis during cell-cycle progression is crucial for genomic stability. During G2 and mitosis, Set8 catalyzes monomethylation of histone H4 on lysine 20 (H4K20me1), which promotes chromatin compaction. Set8 levels decline in S phase, but why and how this occurs is unclear. Here, we show that Set8 is targeted for proteolysis in S phase and in response to DNA damage by the E3 ubiquitin ligase, CRL4(Cdt2). Set8 ubiquitylation occurs on chromatin and is coupled to DNA replication via a specific degron in Set8 that binds PCNA. Inactivation of CRL4(Cdt2) leads to Set8 stabilization and aberrant H4K20me1 accumulation in replicating cells. Transient S phase expression of a Set8 mutant lacking the degron promotes premature H4K20me1 accumulation and chromatin compaction, and triggers a checkpoint-mediated G2 arrest. Thus, CRL4(Cdt2)-dependent destruction of Set8 in S phase preserves genome stability by preventing aberrant chromatin compaction during DNA synthesis.

???displayArticle.pubmedLink??? 20932472
???displayArticle.pmcLink??? PMC2957874
???displayArticle.link??? Mol Cell
???displayArticle.grants??? [+]

Species referenced: Xenopus
Genes referenced: dtl pcna

References [+] :
Abbas, PCNA-dependent regulation of p21 ubiquitylation and degradation via the CRL4Cdt2 ubiquitin ligase complex. 2008, Pubmed