Association of UHRF1 with methylated H3K9 directs the maintenance of DNA methylation.

Association of UHRF1 with methylated H3K9 directs the maintenance of DNA methylation.
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DOI:
10.1038/nsmb.2391
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发表时间:
2012-11
影响因子:
16.8
通讯作者:
Strahl, Brian D.
Strahl, Brian D.
中科院分区:
生物学1区
文献类型:
--
作者:
Rothbart, Scott B.;Krajewski, Krzysztof;Nady, Nataliya;Tempel, Wolfram;Xue, Sheng;Badeaux, Aimee I.;Barsyte-Lovejoy, Dalia;Martinez, Jorge Y.;Bedford, Mark T.;Fuchs, Stephen M.;Arrowsmith, Cheryl H.;Strahl, Brian D.

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哺乳动物生物学中的一个基本挑战是阐明DNA甲基化和组蛋白翻译后修饰的机制。人UHRF 1(泛素样,PHD和RING指含1)具有多个结合染色质的结构域,并在遗传上参与DNA甲基化维持。然而,UHRF 1调控DNA甲基化的分子机制还不清楚。在这里,我们表明,UHRF 1与甲基化组蛋白H3赖氨酸9(H3 K9)的关联是DNA甲基化维持所必需的。我们进一步表明,UHRF 1与H3 K9甲基化的关联对相邻的H3丝氨酸10磷酸化不敏感-一种已知的有丝分裂“磷酸/甲基开关”。重要的是,我们证明了UHRF 1有丝分裂染色质缔合是通过调节DNMT 1稳定性来维持DNA甲基化所必需的。总的来说,我们的研究结果定义了H3 K9甲基化和DNA甲基化的忠实表观遗传之间的新联系,建立了UHRF 1在这个过程中意想不到的有丝分裂作用。
A fundamental challenge in mammalian biology has been elucidating mechanisms linking DNA methylation and histone post-translational modifications. Human UHRF1 (ubiquitin-like, PHD and RING finger containing 1) has multiple domains that bind chromatin and is implicated genetically in DNA methylation maintenance. However, molecular mechanisms underlying DNA methylation regulation by UHRF1 are poorly defined. Here we show that UHRF1 association with methylated histone H3 lysine 9 (H3K9) is required for DNA methylation maintenance. We further show that UHRF1 association with H3K9 methylation is insensitive to adjacent H3 serine 10 phosphorylation – a known mitotic ‘phospho/methyl switch.’ Importantly, we demonstrate that UHRF1 mitotic chromatin association is necessary for DNA methylation maintenance through regulation of DNMT1 stability. Collectively, our results define a novel link between H3K9 methylation and the faithful epigenetic inheritance of DNA methylation, establishing an unexpected mitotic role for UHRF1 in this process.
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