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The many faces of ubiquitinated histone H2A: insights from the DUBs

机译:泛素化组蛋白H2A的众多面孔:来自DUB的见解

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Monoubiquitination of H2A is a major histone modification in mammalian cells. Understanding how monoubiquitinated H2A (uH2A) regulates DNA-based processes in the context of chromatin is a challenging question. Work in the past years linked uH2A to transcriptional repression by the Polycomb group proteins of developmental regulators. Recently, a number of mammalian deubiquitinating enzymes (DUBs) that catalyze the removal of ubiquitin from H2A have been discovered. These studies provide convincing evidence that H2A deubiquitination is connected with gene activation. In addition, uH2A regulatory enzymes have crucial roles in the cellular response to DNA damage and in cell cycle progression. In this review we will discuss new insights into uH2A biology, with emphasis on the H2A DUBs.
机译:H2A的单泛素化是哺乳动物细胞中的主要组蛋白修饰。了解单泛素化的H2A(uH2A)如何在染色质的背景下调节基于DNA的过程是一个具有挑战性的问题。过去几年的工作将uH2A与发育调节剂的Polycomb组蛋白的转录抑制联系起来。最近,已经发现了许多催化从H2A中去除泛素的哺乳动物去泛素化酶(DUB)。这些研究提供了令人信服的证据,证明H2A去泛素化与基因激活有关。此外,uH2A调节酶在细胞对DNA损伤的反应和细胞周期进程中也起着至关重要的作用。在这篇评论中,我们将讨论对uH2A生物学的新见解,重点是H2A DUB。

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