当前位置: X-MOL 学术BioEssays › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Activity of PRC1 and Histone H2AK119 Monoubiquitination: Revising Popular Misconceptions.
BioEssays ( IF 3.2 ) Pub Date : 2020-03-20 , DOI: 10.1002/bies.201900192
Idan Cohen 1 , Carmit Bar 2 , Elena Ezhkova 2
Affiliation  

Polycomb group proteins are evolutionary conserved chromatin-modifying complexes, essential for the regulation of developmental and cell-identity genes. Polycomb-mediated transcriptional regulation is provided by two multi-protein complexes known as Polycomb repressive complex 1 (PRC1) and 2 (PRC2). Recent studies positioned PRC1 as a foremost executer of Polycomb-mediated transcriptional control. Mammalian PRC1 complexes can form multiple sub-complexes that vary in their core and accessory subunit composition, leading to fascinating and diverse transcriptional regulatory mechanisms employed by PRC1 complexes. These mechanisms include PRC1-catalytic activity toward monoubiquitination of histone H2AK119, a well-established hallmark of PRC1 complexes, whose importance has been long debated. In this review, the central roles that PRC1-catalytic activity plays in transcriptional repression are emphasized and the recent evidence supporting a role for PRC1 complexes in gene activation is discussed.

中文翻译:


PRC1 和组蛋白 H2AK119 单泛素化的活性:纠正流行的误解。



多梳蛋白是进化保守的染色质修饰复合物,对于发育和细胞身份基因的调节至关重要。 Polycomb 介导的转录调控由两种多蛋白复合物提供,称为 Polycomb 抑制复合物 1 (PRC1) 和 2 (PRC2)。最近的研究将 PRC1 定位为 Polycomb 介导的转录控制的最重要执行者。哺乳动物 PRC1 复合物可以形成多个子复合物,其核心和辅助亚基组成各不相同,从而导致 PRC1 复合物采用令人着迷且多样化的转录调节机制。这些机制包括 PRC1 对组蛋白 H2AK119 的单泛素化的催化活性,这是 PRC1 复合物的一个公认的标志,其重要性长期以来一直存在争议。在这篇综述中,强调了 PRC1 催化活性在转录抑制中发挥的核心作用,并讨论了支持 PRC1 复合物在基因激活中作用的最新证据。
更新日期:2020-04-22
down
wechat
bug