Remodeling of ribonucleoprotein complexes with DExH/D RNA helicases.

Remodeling of ribonucleoprotein complexes with DExH/D RNA helicases.
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用DEXH/D RNA解旋酶重塑核糖核蛋白复合物。

DOI:
10.1093/nar/gkl410
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发表时间:
2006
影响因子:
14.9
通讯作者:
Bowers, Heath
Bowers, Heath
中科院分区:
生物学2区
文献类型:
--
作者:
Jankowsky, Eckhard;Bowers, Heath

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DExH/D蛋白家族是真核生物RNA代谢中最大的一类酶。DExH/D蛋白主要以其以ATP依赖性方式解开RNA双链体的能力而闻名。然而,近年来已经清楚的是,这些DExH/D RNA解旋酶也参与RNA-蛋白质复合物的ATP依赖性重塑。在这里,我们回顾了最近的研究,突出DExH/D蛋白在从RNA中置换蛋白质的生理作用。我们进一步讨论了简单的RNA-蛋白质复合物在体外的工作,阐明了DExH/D蛋白从RNA中去除蛋白质的机制。虽然我们刚刚开始了解DExH/D蛋白如何重塑RNA-蛋白质复合物,但这些研究表明,“RNA解旋酶”本身并不需要辅因子来从RNA中置换蛋白质,蛋白质置换不一定涉及RNA双链体解旋,并且并非所有DExH/D蛋白都能够分解相同范围的核糖核蛋白。
The DExH/D protein family is the largest group of enzymes in eukaryotic RNA metabolism. DExH/D proteins are mainly known for their ability to unwind RNA duplexes in an ATP-dependent fashion. However, it has become clear in recent years that these DExH/D RNA helicases are also involved in the ATP-dependent remodeling of RNA–protein complexes. Here we review recent studies that highlight physiological roles of DExH/D proteins in the displacement of proteins from RNA. We further discuss work with simple RNA–protein complexes in vitro, which illuminates mechanisms by which DExH/D proteins remove proteins from RNA. Although we are only beginning to understand how DExH/D proteins remodel RNA–protein complexes, these studies have shown that an ‘RNA helicase’ does not per se require cofactors to displace proteins from RNA, that protein displacement does not necessarily involve RNA duplex unwinding, and that not all DExH/D proteins are able to disassemble the same range of ribonucleoproteins.
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