MukBEF, a chromosomal organizer.

MukBEF, a chromosomal organizer.
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DOI:
10.1159/000369099
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发表时间:
2014
影响因子:
1.2
通讯作者:
Zhao H
Zhao H
中科院分区:
生物4区
文献类型:
--
作者:
Rybenkov VV;Herrera V;Petrushenko ZM;Zhao H

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细菌染色体的整体折叠需要凝聚素的活性。这些高度保守的蛋白质参与了多种生物体中高阶染色质动力学的各个方面。已经在细菌中鉴定出两个不同的凝聚素超家族。SMC-ScpAB蛋白与真核凝聚素和粘附素具有显著的同源性,并且在大多数目前测序的细菌中发现。本文综述了MukBEF/MksBEF超家族,该家族广泛分布于不同的细菌中,其特征在于低序列保守性。这个超家族的原型成员,大肠杆菌凝聚素MukBEF,继续提供关键的见解蛋白质的机制。MukBEF作为一个复杂的分子机器,协助染色体分离和全球组织。本文综述了MukBEF对DNA组织的机制分析,重点是它参与染色质支架的形成以及在染色体分离中可能的其他作用。
Global folding of bacterial chromosome requires the activity of condensins. These highly conserved proteins are involved in various aspects of higher order chromatin dynamics in a diverse range of organisms. Two distinct superfamilies of condensins have been identified in bacteria. The SMC-ScpAB proteins bear significant homology to eukaryotic condensins and cohesins and are found in most of presently sequenced bacteria. This review focuses on the MukBEF/MksBEF superfamily, which is broadly distributed across diverse bacteria and is characterized by low sequence conservation. The prototypical member of this superfamily, the Escherichia coli condensin MukBEF, continues to provide critical insights into the mechanism of the proteins. MukBEF acts as a complex molecular machine that assists in chromosome segregation and global organization. The review focuses on mechanistic analysis of DNA organization by MukBEF with the emphasis on its involvement in formation of chromatin scaffold and plausible other roles in chromosome segregation.
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