TOPs and their regulation

被引：67

作者：

Hamilton, TL ^{[1
]}

Stoneley, M ^{[1
]}

Bushell, M ^{[1
]}

机构：

[1] Univ Nottingham, Sch Pharm, Nottingham NG7 2RD, England

来源：

BIOCHEMICAL SOCIETY TRANSACTIONS | 2006年 / 34卷

关键词：

La; mammalian target of rapamycin (mTOR); mRNA; phosphoinositide 3-kinase (PI3K); protein synthesis; translation;

D O I：

10.1042/BST0340012

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Upon cell-cycle arrest or nutrient deprivation, the cellular rate of ribosome production is reduced significantly. in mammalian cells, this effect is achieved in part through a co-ordinated inhibition of RP (ribosomal protein) synthesis. More specifically, translation initiation on RP mRNAs is inhibited. Translational regulation of RP synthesis is dependent on cis-elements within the 5'-UTRs (5'-untranslated regions) of the RP mRNAs. In particular, a highly conserved 5'-TOP (5'-terminal oligopyrimidine tract) appears to play a key role in the regulation of RP mRNA translation. This article explores recent developments in our understanding of the mechanism of TOP mRNA regulation, focusing on upstream signalling pathways and trans-acting factors, and highlighting some interesting observations which have come to light following the recent development of cDNA microarray technology coupled with polysome analysis.

引用

页码：12 / 16

页数：5

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