PTEN interacts with histone H1 and controls chromatin condensation.

PTEN interacts with histone H1 and controls chromatin condensation.
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DOI:
10.1016/j.celrep.2014.08.008
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发表时间:
2014-09-25
期刊:
影响因子:
8.8
通讯作者:
Shen WH
Shen WH
中科院分区:
生物学1区
文献类型:
--
作者:
Chen ZH;Zhu M;Yang J;Liang H;He J;He S;Wang P;Kang X;McNutt MA;Yin Y;Shen WH

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染色质组织和动力学是全球基因转录不可或缺的。组蛋白修饰影响染色质状态和基因表达。PTEN在肿瘤的抑制、发展和代谢中起着多种作用。在这里,我们报告的相互作用的PTEN,组蛋白H1和染色质。我们发现,PTEN的损失导致组蛋白H1从染色质和染色质的解凝聚的解离。PTEN缺失还导致组蛋白H4在赖氨酸16处乙酰化的升高,赖氨酸16是染色质活化的表观遗传标记。我们发现,PTEN和组蛋白H1通过它们的C-末端结构域物理相互作用。PTEN C-末端的破坏促进MOF乙酰转移酶的染色质缔合并诱导H4 K16乙酰化。H4 K16的超乙酰化损害了PTEN与组蛋白H1的结合,这构成了可能恶化染色质稳定性的调节反馈。我们的研究结果表明,PTEN控制染色质凝聚,从而影响基因表达。我们认为,PTEN通过组蛋白和染色质重塑调控全局基因转录谱。
Chromatin organization and dynamics are integral to global gene transcription. Histone modification influences chromatin status and gene expression. PTEN plays multiple roles in tumor suppression, development and metabolism. Here we report on the interplay of PTEN, histone H1 and chromatin. We show that loss of PTEN leads to dissociation of histone H1 from chromatin and decondensation of chromatin. PTEN deletion also results in elevation of histone H4 acetylation at lysine 16, an epigenetic marker for chromatin activation. We found that PTEN and histone H1 physically interact through their C-terminal domains. Disruption of the PTEN C-terminus promotes the chromatin association of MOF acetyltransferase and induces H4K16 acetylation. Hyperacetylation of H4K16 impairs the association of PTEN with histone H1, which constitutes regulatory feedback that may deteriorate chromatin stability. Our results demonstrate that PTEN controls chromatin condensation, thus influencing gene expression. We propose that PTEN regulates global gene transcription profiling through histones and chromatin remodeling.
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