DEAD-box proteins as RNA helicases and chaperones.

DEAD-box proteins as RNA helicases and chaperones.
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DOI:
10.1002/wrna.50
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发表时间:
2011-01
影响因子:
7.3
通讯作者:
Russell, Rick
Russell, Rick
中科院分区:
生物学2区
文献类型:
--
作者:
Jarmoskaite, Inga;Russell, Rick

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死亡盒蛋白在RNA介导的过程中普遍存在,并通过ATP结合和水解的偶联循环来改变对单链RNA的亲和力。许多DEAD盒蛋白利用这种基本机制作为RNA解旋酶活性的基础,在很少或不涉及易位的过程中有效地分离短RNA双链体的链。这种活性,再加上将不同的DEAD盒蛋白导向其生理底物的机制,使它们能够促进RNA折叠步骤和重排,并加速RNA-蛋白质复合物的重塑。本文将介绍DEAD盒蛋白作为RNA解旋酶的性质,以及目前对ATP酶活性的能量如何用于驱动RNA双链体分离的理解。然后,它将描述基本的生化特性如何允许一些死亡盒蛋白质作为伴侣蛋白,通过促进RNA折叠反应,重点是自我剪接组I和组II内含子RNA。
DEAD-box proteins are ubiquitous in RNA-mediated processes and function by coupling cycles of ATP binding and hydrolysis to changes in affinity for single-stranded RNA. Many DEAD-box proteins use this basic mechanism as the foundation for a version of RNA helicase activity, efficiently separating the strands of short RNA duplexes in a process that involves little or no translocation. This activity, coupled with mechanisms to direct different DEAD-box proteins to their physiological substrates, allows them to promote RNA folding steps and rearrangements and to accelerate remodeling of RNA-protein complexes. This review will describe the properties of DEAD-box proteins as RNA helicases and the current understanding of how the energy from ATPase activity is used to drive the separation of RNA duplex strands. It will then describe how the basic biochemical properties allow some DEAD-box proteins to function as chaperones by promoting RNA folding reactions, with a focus on the self-splicing group I and group II intron RNAs.
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