Translation of small open reading frames within unannotated RNA transcripts in Saccharomyces cerevisiae.

Translation of small open reading frames within unannotated RNA transcripts in Saccharomyces cerevisiae.
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DOI:
10.1016/j.celrep.2014.05.023
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发表时间:
2014-06-26
期刊:
影响因子:
8.8
通讯作者:
Baker KE
Baker KE
中科院分区:
生物学1区
文献类型:
--
作者:
Smith JE;Alvarez-Dominguez JR;Kline N;Huynh NJ;Geisler S;Hu W;Coller J;Baker KE

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High-throughput gene expression analysis has revealed a plethora of previously undetected transcripts in eukaryotic cells. In this study we investigate >1100 unannotated transcripts in yeast predicted to lack protein-coding capacity. We show that a majority of these RNAs are enriched on polyribosomes akin to mRNAs. Ribosome profiling demonstrates that many bind translocating ribosomes within predicted open-reading frames 10–96 codons in size. We validate expression of peptides encoded within a subset of these RNAs and provide evidence for conservation among yeast species. Consistent with their translation, many of these transcripts are targeted for degradation by the translation-dependent, nonsense-mediated RNA decay (NMD) pathway. We identify lncRNAs also sensitive to NMD, indicating translation of non-coding transcripts also occurs in mammals. These data demonstrate transcripts considered to lack coding potential are bona fide protein-coding, and expand the proteome of yeast and possibly other eukaryotes.
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