Transcriptome-wide Analysis of Roles for tRNA Modifications in Translational Regulation.

Transcriptome-wide Analysis of Roles for tRNA Modifications in Translational Regulation.
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DOI:
10.1016/j.molcel.2017.11.002
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发表时间:
2017-12-07
期刊:
影响因子:
16
通讯作者:
Rando OJ
Rando OJ
中科院分区:
生物学1区
文献类型:
--
作者:
Chou HJ;Donnard E;Gustafsson HT;Garber M;Rando OJ

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Covalent nucleotide modifications in noncoding RNAs affect a plethora of biological processes, and new functions continue to be discovered even for well-known modifying enzymes. To systematically compare the functions of a large set of ncRNA modifications in gene regulation, we carried out ribosome profiling in budding yeast to characterize 57 nonessential genes involved in tRNA modification. Deletion mutants exhibited a range of translational phenotypes, with enzymes known to modify anticodons, or non-tRNA substrates such as rRNA, exhibiting the most dramatic translational perturbations. Our data build on prior reports documenting translational upregulation of the nutrient-responsive transcription factor Gcn4 in response to numerous tRNA perturbations, and identify many additional translationally-regulated mRNAs throughout the yeast genome. Our data also uncover unexpected roles for tRNA modifying enzymes in regulation of TY retroelements, and in rRNA 2′-O-methylation. This dataset should provide a rich resource for discovery of additional links between tRNA modifications and gene regulation. RNA modifications affect a multitude of biological processes. Chou et al comprehensively investigate the functions of one large set of ncRNA modifications, generating ribosome occupancy maps for mutant yeast lacking tRNA-modifying enzymes. This dataset confirms prior studies, identifies new functions for many enzymes, and provides a resource for future analyses.
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