Regulation of translation by methylation multiplicity of 18S rRNA.
Regulation of translation by methylation multiplicity of 18S rRNA.
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DOI:
10.1016/j.celrep.2021.108825
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发表时间:
2021-03-09
期刊:
影响因子:
8.8
通讯作者:
Tu BP
中科院分区:
文献类型:
--
作者:
Liu K;Santos DA;Hussmann JA;Wang Y;Sutter BM;Weissman JS;Tu BP
N6-methyladenosine (m6A) is a conserved ribonucleoside modification that regulates many facets of RNA metabolism. Using quantitative mass spectrometry, we find that the universally conserved tandem adenosines at the 3′ end of 18S rRNA, thought to be constitutively di-methylated (m62A), are also mono-methylated (m6A). Although present at substoichiometric amounts, m6A at these positions increases significantly in response to sulfur starvation in yeast cells and mammalian cell lines. Combining yeast genetics and ribosome profiling, we provide evidence to suggest that m6A-bearing ribosomes carry out translation distinctly from m62A-bearing ribosomes, featuring a striking specificity for sulfur metabolism genes. Our work thus reveals methylation multiplicity as a mechanism to regulate translation. Ribosome heterogeneity has become increasingly evident. Liu et al. report an example in the form of rRNA methylation. They show two conserved adenosines in the 18S rRNA are modified with varying numbers of methyl groups. Differentially methylated ribosomes translate differently, suggesting methylation multiplicity as a mechanism to regulate translation.
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