Electron microscopy studies of nucleosome remodelers.

Electron microscopy studies of nucleosome remodelers.
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DOI:
10.1016/j.sbi.2011.10.002
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发表时间:
2011-12
影响因子:
6.8
通讯作者:
Leschziner AE
Leschziner AE
中科院分区:
生物学2区
文献类型:
--
作者:
Leschziner AE

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ATP 依赖性染色质重塑复合物或重塑剂是大型蛋白质组装体,利用 ATP 水解产生的能量非共价修饰核小体结构,在染色质动力学调节中发挥核心作用。我们对这种重塑活动的机制和调节以及染色质重塑者可以产生的产品多样性的理解仍然有限,部分原因是这些具有挑战性的样本的结构数据非常少。电子显微镜(EM)和单粒子方法已经在许多重塑复合物的结构表征方面取得了进展。在这里,我将回顾迄今为止所做的工作,重点关注我们从这些结构中获得的功能见解。
ATP-dependent chromatin remodeling complexes, or remodelers, are large protein assemblies that use the energy from ATP hydrolysis to non-covalently modify the structure of nucleosomes, playing a central role in the regulation of chromatin dynamics. Our understanding of the mechanism and regulation of this remodeling activity and the diversity of products that chromatin remodelers can generate remains limited, partly because very little structural data is available on these challenging samples. Electron microscopy (EM) and single-particle approaches have made inroads into the structural characterization of a number of remodeling complexes. Here I will review the work done to date, focusing on functional insights we have gained from these structures.
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