Physiological roles of class I HDAC complex and histone demethylase.

Physiological roles of class I HDAC complex and histone demethylase.
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DOI:
10.1155/2011/129383
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发表时间:
2011
影响因子:
--
通讯作者:
Nakayama J
Nakayama J
中科院分区:
其他
文献类型:
--
作者:
Hayakawa T;Nakayama J

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表观遗传基因沉默是细胞分化和发育过程中确保基因表达模式正确的基本机制之一。组蛋白去乙酰化酶(HDAC)是一种进化上保守的酶,它能去除组蛋白上的乙酰基修饰,在表观遗传基因沉默中起着重要作用。在细胞中,HDAC形成多蛋白复合物(HDAC复合物),其中相关蛋白被认为有助于HDAC执行其细胞功能。虽然每个HDAC复合物含有不同的组分,但某些组分的同种型的存在扩大了复合物的种类及其细胞作用的多样性。最近的研究还揭示了HDAC复合物和特定组蛋白去甲基化酶之间的功能联系。在本文中,我们总结了四个I类HDAC复合物,Sin 3,NuRD,CoREST和NCoR/SMRT,其组分的多样性和它们与特定的组蛋白去甲基化酶的关系的不同和合作的作用。
Epigenetic gene silencing is one of the fundamental mechanisms for ensuring proper gene expression patterns during cellular differentiation and development. Histone deacetylases (HDACs) are evolutionally conserved enzymes that remove acetyl modifications from histones and play a central role in epigenetic gene silencing. In cells, HDAC forms a multiprotein complex (HDAC complex) in which the associated proteins are believed to help HDAC carry out its cellular functions. Though each HDAC complex contains distinct components, the presence of isoforms for some of the components expands the variety of complexes and the diversity of their cellular roles. Recent studies have also revealed a functional link between HDAC complexes and specific histone demethylases. In this paper, we summarize the distinct and cooperative roles of four class I HDAC complexes, Sin3, NuRD, CoREST, and NCoR/SMRT, with respect to their component diversity and their relationship with specific histone demethylases.
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