Rapid RNase L-driven arrest of protein synthesis in the dsRNA response without degradation of translation machinery.
Rapid RNase L-driven arrest of protein synthesis in the dsRNA response without degradation of translation machinery.
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DOI:
10.1261/rna.062000.117
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发表时间:
2017-11
期刊:
影响因子:
--
通讯作者:
Korennykh A
中科院分区:
文献类型:
--
作者:
Donovan J;Rath S;Kolet-Mandrikov D;Korennykh A
Mammalian cells respond to double-stranded RNA (dsRNA) by activating a translation-inhibiting endoribonuclease, RNase L. Consensus in the field indicates that RNase L arrests protein synthesis by degrading ribosomal RNAs (rRNAs) and messenger RNAs (mRNAs). However, here we provide evidence for a different and far more efficient mechanism. By sequencing abundant RNA fragments generated by RNase L in human cells, we identify site-specific cleavage of two groups of noncoding RNAs: Y-RNAs, whose function is poorly understood, and cytosolic tRNAs, which are essential for translation. Quantitative analysis of human RNA cleavage versus nascent protein synthesis in lung carcinoma cells shows that RNase L stops global translation when tRNAs, as well as rRNAs and mRNAs, are still intact. Therefore, RNase L does not have to degrade the translation machinery to stop protein synthesis. Our data point to a rapid mechanism that transforms a subtle RNA cleavage into a cell-wide translation arrest.
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DOI:
10.4137/bic.s20764
发表时间:
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期刊:
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影响因子:
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