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Polysomes, P bodies and stress granules: states and fates of eukaryotic mRNAs

Authors
Publisher
Elsevier Ltd
Publication Date
Volume
21
Issue
3
Identifiers
DOI: 10.1016/j.ceb.2009.03.005

Abstract

The control of translation and mRNA degradation plays a key role in the regulation of eukaryotic gene expression. In the cytosol, mRNAs engaged in translation are distributed throughout the cytosol, while translationally inactive mRNAs can accumulate in P bodies, in complex with mRNA degradation and translation repression machinery, or in stress granules, which appear to be mRNAs stalled in translation initiation. Here we discuss how these different granules suggest a dynamic model for the metabolism of cytoplasmic mRNAs wherein they cycle between different mRNP states with different functional properties and subcellular locations.

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