The control of mRNA decapping and P-body formation.

The control of mRNA decapping and P-body formation.
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mRNA 脱帽和 P 体形成的控制。

DOI:
10.1016/j.molcel.2008.11.001
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发表时间:
2008-12-05
期刊:
影响因子:
16
通讯作者:
Lykke-Andersen, Jens
Lykke-Andersen, Jens
中科院分区:
生物学1区
文献类型:
--
作者:
Franks, Tobias M.;Lykke-Andersen, Jens

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信使核糖核酸的解离是真核生物胞质信使核糖核酸周转的关键步骤。Dcp2与其共激活子Dcp1共同催化胞质内mRNA的解离,并受解脱增强子蛋白的刺激。与去壳机制相关的mRNAs可以组装成细胞质mRNP颗粒,称为加工体(PBS)。有证据表明,与PB相关的mRNP在翻译上受到抑制,可以被降解或储存起来供后续翻译使用。然而,mRNP组装成PB是否对翻译抑制、解链或腐烂是重要的仍然存在争议。在这里,我们讨论了特定mRNPs的去壳机制招募的调节,以及它们组装到PBS中的方式是如何受到翻译抑制、mRNP多聚化和mRNA衰变的相对速率的控制。
mRNA decapping is a critical step in eukaryotic cytoplasmic mRNA turnover. Cytoplasmic mRNA decapping is catalyzed by Dcp2 in conjunction with its co-activator Dcp1, and is stimulated by decapping enhancer proteins. mRNAs associated with the decapping machinery can assemble into cytoplasmic mRNP granules called processing bodies (PBs). Evidence suggests that PB-associated mRNPs are translationally repressed and can be degraded or stored for subsequent translation. However, whether mRNP assembly into a PB is important for translational repression, decapping or decay has remained controversial. Here we discuss the regulation of decapping machinery recruitment to specific mRNPs and how their assembly into PBs is governed by the relative rates of translational repression, mRNP multimerization and mRNA decay.
DOI: 10.1083/jcb.136.4.761
发表时间: 1997-02-24
期刊: The Journal of cell biology
影响因子: --
作者:
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