AUTHOR=Leiva Lorenzo Eugenio , Pincheira Andrea , Elgamal Sara , Kienast Sandra D. , Bravo Verónica , Leufken Johannes , Gutiérrez Daniela , Leidel Sebastian A. , Ibba Michael , Katz Assaf TITLE=Modulation of Escherichia coli Translation by the Specific Inactivation of tRNAGly Under Oxidative Stress JOURNAL=Frontiers in Genetics VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2020.00856 DOI=10.3389/fgene.2020.00856 ISSN=1664-8021 ABSTRACT=

Bacterial oxidative stress responses are generally controlled by transcription factors that modulate the synthesis of RNAs with the aid of some sRNAs that control the stability, and in some cases the translation, of specific mRNAs. Here, we report that oxidative stress additionally leads to inactivation of tRNAGly in Escherichia coli, inducing a series of physiological changes. The observed inactivation of tRNAGly correlated with altered efficiency of translation of Gly codons, suggesting a possible mechanism of translational control of gene expression under oxidative stress. Changes in translation also depended on the availability of glycine, revealing a mechanism whereby bacteria modulate the response to oxidative stress according to the prevailing metabolic state of the cells.