Mechanisms of nuclear actin in chromatin-remodeling complexes.

Mechanisms of nuclear actin in chromatin-remodeling complexes.
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DOI:
10.1016/j.tcb.2013.10.007
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发表时间:
2014-04
影响因子:
19
通讯作者:
Shen, Xuetong
Shen, Xuetong
中科院分区:
生物学1区
文献类型:
--
作者:
Kapoor, Prabodh;Shen, Xuetong

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核肌动蛋白之谜几十年来一直困扰着生物学家,主要原因是缺乏明确的实验系统。然而,在过去的十年中,含有肌动蛋白的染色质修饰复合物作为一种明确的遗传和生化系统的发展,为剖析肌动蛋白在细胞核中的作用机制提供了前所未有的机会。虽然肌动蛋白的既定功能主要依赖于其动态聚合,但在INO80染色质重塑复合体中肌动蛋白机制的新发现表明,肌动蛋白在概念上是一种独特的单体功能模式。在这篇综述中,我们强调了新的范式,并讨论了肌动蛋白与染色质的相互作用如何表明了传统细胞质肌动蛋白和核肌动蛋白之间的根本分歧。此外,我们提供了如何将该框架应用于核肌动蛋白在其他含有肌动蛋白的染色质修饰复合物中的研究。
The mystery of nuclear actin has puzzled biologists for decades largely due to the lack of defined experimental systems. However, the development of actin-containing chromatin modifying complexes as a defined genetic and biochemical system in the past decade has provided an unprecedented opportunity to dissect the mechanism of actin in the nucleus. While the established functions of actin mostly rely on its dynamic polymerization, the novel finding of actin's mechanism in the INO80 chromatin remodeling complex suggests a conceptually distinct mode of actin that functions as a monomer. In this review, we highlight the new paradigm and discuss how actin's interaction with chromatin suggests a fundamental divergence between conventional cytoplasmic actin and nuclear actin. Furthermore, we provide how this framework could be applied to investigations of nuclear actin in other actin-containing chromatin modifying complexes.
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