The Polycomb complex PRC2 and its mark in life.

The Polycomb complex PRC2 and its mark in life.
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DOI:
10.1038/nature09784
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发表时间:
2011-01-20
期刊:
影响因子:
64.8
通讯作者:
Reinberg, Danny
Reinberg, Danny
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Margueron, Raphael;Reinberg, Danny

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Polycomb组蛋白通过调节染色质结构来维持早期发育期间设定的不同细胞的基因表达模式。在哺乳动物中,存在两种主要的Polycomb组复合物- Polycomb抑制复合物1(PRC 1)和2(PRC 2)。PRC 1压缩染色质并催化组蛋白H2 A的单泛素化。PRC 2还有助于染色质压实,并催化组蛋白H3在赖氨酸27处的甲基化。PRC 2参与各种生物学过程,包括分化、维持细胞身份和增殖以及干细胞可塑性。最近对PRC 2的研究扩大了我们对其功能和调控的看法,并揭示了非编码RNA在PRC 2向靶基因募集中的作用。
Polycomb group proteins maintain the gene-expression pattern of different cells that is set during early development by regulating chromatin structure. In mammals, two main Polycomb group complexes exist — Polycomb repressive complex 1 (PRC1) and 2 (PRC2). PRC1 compacts chromatin and catalyses the monoubiquitylation of histone H2A. PRC2 also contributes to chromatin compaction, and catalyses the methylation of histone H3 at lysine 27. PRC2 is involved in various biological processes, including differentiation, maintaining cell identity and proliferation, and stem-cell plasticity. Recent studies of PRC2 have expanded our perspectives on its function and regulation, and uncovered a role for non-coding RNA in the recruitment of PRC2 to target genes.
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