Widespread Co-translational RNA Decay Reveals Ribosome Dynamics.

Widespread Co-translational RNA Decay Reveals Ribosome Dynamics.
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DOI:
10.1016/j.cell.2015.05.008
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发表时间:
2015-06-04
期刊:
影响因子:
64.5
通讯作者:
Steinmetz LM
Steinmetz LM
中科院分区:
生物学1区
文献类型:
--
作者:
Pelechano V;Wei W;Steinmetz LM

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It is generally assumed that mRNAs undergoing translation are protected from decay. Here we show that mRNAs are in fact co-translationally degraded. This is a widespread and conserved process affecting most genes, where 5’-3’ transcript degradation follows the last translating ribosome, producing an in vivo ribosomal footprint. By sequencing the ends of 5’phosphorylated mRNA degradation intermediates, we obtain a genome-wide drug-free measurement of ribosome dynamics. We identify general translation termination pauses in both normal and stress conditions. In addition, we describe novel codon-specific ribosomal pausing sites in response to oxidative stress, which are dependent on the RNase Rny1. Our approach is simple and straightforward, and does not require the use of translational inhibitors or in vitro RNA footprinting that can alter ribosome protection patterns.
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