Emerging Roles for Intermolecular RNA-RNA Interactions in RNP Assemblies.

Emerging Roles for Intermolecular RNA-RNA Interactions in RNP Assemblies.
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DOI:
10.1016/j.cell.2018.07.023
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发表时间:
2018-08-09
期刊:
影响因子:
64.5
通讯作者:
Parker R
Parker R
中科院分区:
生物学1区
文献类型:
--
作者:
Van Treeck B;Parker R

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真核细胞含有RNA和蛋白质的大集合体,称为核糖核蛋白(RNP)颗粒,其包括细胞质P-体、应激颗粒、神经元和胚泡颗粒,以及由重复扩增RNA形成的核旁斑、Cajal体和RNA灶。最近的证据表明,分子间RNA-RNA相互作用在形成和确定某些RNP颗粒的组成中发挥作用。我们假设分子间的RNA-RNA相互作用在细胞中是有利的,但受到RNA结合蛋白、解旋酶和核糖体的限制,从而允许正常的RNA功能。过量的分子间RNA-RNA相互作用可能是有毒的,因为增加RNA-RNA相互作用的扰动,如长重复扩增RNA、含精氨酸的二肽重复多肽和大量RNA结合蛋白的螯合或损失,可能导致退行性疾病。
Eukaryotic cells contain large assemblies of RNA and protein, referred to as ribonucleoprotein (RNP) granules, which include cytoplasmic P-bodies, stress granules, neuronal and germinal granules, as well as nuclear paraspeckles, Cajal bodies and RNA foci formed from repeat expansion RNAs. Recent evidence argues that intermolecular RNA-RNA interactions play a role in forming and determining the composition of certain RNP granules. We hypothesize that intermolecular RNA-RNA interactions are favored in cells yet are limited by RNA-binding proteins, helicases, and ribosomes, thereby allowing normal RNA function. An overabundance of intermolecular RNA-RNA interactions may be toxic since perturbations that increase RNA-RNA interactions such as long repeat expansion RNAs, arginine-containing dipeptide repeat polypeptides, and sequestration or loss of abundant RNA-binding proteins can contribute to degenerative diseases.
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