1. Loss of N 1 -methylation of G37 in tRNA induces ribosome stalling and reprograms gene expression.
- Author
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Masuda I, Hwang JY, Christian T, Maharjan S, Mohammad F, Gamper H, Buskirk AR, and Hou YM
- Subjects
- Amino Acids genetics, Amino Acids metabolism, Escherichia coli growth & development, Escherichia coli metabolism, Methylation, Protein Biosynthesis genetics, Substrate Specificity, Escherichia coli genetics, Frameshifting, Ribosomal, Gene Expression, Protein Biosynthesis physiology, RNA, Transfer genetics, RNA, Transfer metabolism
- Abstract
N
1 -methylation of G37 is required for a subset of tRNAs to maintain the translational reading-frame. While loss of m1 G37 increases ribosomal +1 frameshifting, whether it incurs additional translational defects is unknown. Here, we address this question by applying ribosome profiling to gain a genome-wide view of the effects of m1 G37 deficiency on protein synthesis. Using E coli as a model, we show that m1 G37 deficiency induces ribosome stalling at codons that are normally translated by m1 G37 deficiency reduces tRNA aminoacylation and in some cases peptide-bond formation. We observe changes of gene expression in m1 G37 deficiency reduces tRNA aminoacylation and in some cases peptide-bond formation. We observe changes of gene expression in m1 G37 deficiency similar to those in the stringent response that is typically induced by deficiency of amino acids. This work demonstrates a previously unrecognized function of m1 G37 that emphasizes its role throughout the entire elongation cycle of protein synthesis, providing new insight into its essentiality for bacterial growth and survival., Competing Interests: IM, JH, TC, SM, FM, HG, AB, YH No competing interests declared, (© 2021, Masuda et al.)- Published
- 2021
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