Polycomb Gene Silencing Mechanisms: PRC2 Chromatin Targeting, H3K27me3 'Readout', and Phase Separation-Based Compaction.

Polycomb Gene Silencing Mechanisms: PRC2 Chromatin Targeting, H3K27me3 'Readout', and Phase Separation-Based Compaction.
复制标题

多梳基因沉默机制:PRC2染色质靶向,H3K27me3‘读出’,和基于相分离的紧凑。

DOI:
10.1016/j.tig.2020.12.006
复制
发表时间:
2021-06
期刊:
Trends in genetics : TIG
影响因子:
--
通讯作者:
Wang GG
Wang GG
中科院分区:
其他
文献类型:
--
作者:
Guo Y;Zhao S;Wang GG

文献摘要

参考文献

被引文献

相似文献

通过 Polycomb 抑制复合物 (PRC) 调节染色质结构和/或修饰提供了将基因组划分为功能不同的子域并调节基础基因活性的重要手段。 PRC2 的酶活性及其染色质的招募、扩散和驱逐均通过与辅因子和 DNA 元件(例如未甲基化的 CpG 岛)、组蛋白、RNA(新生 mRNA 和长非编码 RNA)和 R 环的相互作用受到精细调节。 PRC2 催化的组蛋白 H3 赖氨酸 27 三甲基化 (H3K27me3) 可被不同类别的效应子识别,例如典型的 PRC1 和包含 BAH 模块的蛋白质(尤其是人类中的 BAHCC1)。这些效应子通过不同的机制介导基因沉默,包括相分离相关的染色质压缩和组蛋白脱乙酰化。我们讨论了在了解 PRC2 的结构体系、其活性和染色质招募的调节以及 Polycomb 介导的基因沉默的分子机制方面的最新进展。由于 PRC 放松管制与疾病的发展密切相关,因此更好地理解基于 Polycomb 的(表观)基因组调控将对生物学和医学产生深远的影响。
Modulation of chromatin structure and/or modification by Polycomb repressive complexes (PRCs) provides an important means to partition the genome into functionally distinct subdomains and to regulate the activity of the underlying genes. Both the enzymatic activity of PRC2 and its chromatin recruitment, spreading, and eviction are exquisitely regulated via interactions with cofactors and DNA elements (such as unmethylated CpG islands), histones, RNA (nascent mRNA and long noncoding RNA), and R-loops. PRC2-catalyzed histone H3 lysine 27 trimethylation (H3K27me3) is recognized by distinct classes of effectors such as canonical PRC1 and BAH module-containing proteins (notably BAHCC1 in human). These effectors mediate gene silencing by different mechanisms including phase separation-related chromatin compaction and histone deacetylation. We discuss recent advances in understanding the structural architecture of PRC2, the regulation of its activity and chromatin recruitment, and the molecular mechanisms underlying Polycomb-mediated gene silencing. Because PRC deregulation is intimately associated with the development of diseases, a better appreciation of Polycomb-based (epi)genomic regulation will have far-reaching implications in biology and medicine.
DOI: 10.1016/j.molcel.2018.01.039
发表时间: 2018-03-01
期刊: Molecular cell
影响因子: 16
作者:
Chen S;Jiao L;Shubbar M;Yang X;Liu X
通讯作者: Liu X
DOI: 10.1101/gad.256354.114
发表时间: 2015-03-15
影响因子: 10.5
作者:
Alabert C;Barth TK;Reverón-Gómez N;Sidoli S;Schmidt A;Jensen ON;Imhof A;Groth A
通讯作者: Groth A
DOI: 10.1098/rstb.2017.0021
发表时间: 2017-11-05
期刊: Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子: --
作者:
Brockdorff N
通讯作者: Brockdorff N
DOI: 10.1038/s41467-018-05945-4
发表时间: 2018-09-25
影响因子: 16.6
作者:
Cheutin T;Cavalli G
通讯作者: Cavalli G
DOI: 10.1002/ijc.28440
发表时间: 2014-03-01
影响因子: 6.4
作者:
Dewaele, Barbara;Przybyl, Joanna;Debiec-Rychter, Maria
通讯作者: Debiec-Rychter, Maria