Polyadenylation-assisted RNA degradation processes in plants
- PMID: 19716749
- DOI: 10.1016/j.tplants.2009.06.007
Polyadenylation-assisted RNA degradation processes in plants
Abstract
Polyadenylation is a multifunctional post-transcriptional modification that is best known for stabilizing eukaryotic mRNAs and promoting their translation. However, the primordial role of polyadenylation is to target RNAs for degradation by 3' to 5' exoribonucleases. Polyadenylation-assisted RNA degradation contributes to post-transcriptional control in the three genetic compartments of a plant cell: the nucleus, the chloroplast and the mitochondrion. Here, we review the current knowledge of this RNA degradation pathway in these compartments, highlighting recent results that emphasize the crucial role of polyadenylation-assisted RNA degradation in plant genome expression. We also discuss other possible roles of polyadenylation and its sister process polyuridylation.
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