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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Molecular Microbiolo...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Molecular Microbiology
Article . 2021 . Peer-reviewed
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RelA binding of mRNAs modulates translation or sRNA‐mRNA basepairing depending on the position of the GGAG site

Authors: Pallabi Basu; Shoshy Altuvia;

RelA binding of mRNAs modulates translation or sRNA‐mRNA basepairing depending on the position of the GGAG site

Abstract

AbstractPreviously, we reported that RelA protein facilitates Hfq‐mediated mRNA‐sRNA regulation by binding sRNAs carrying a Shine‐Dalgarno‐like GGAG sequence. In turn, sRNA‐Hfq monomers are stabilized, enabling the attachment of more Hfq subunits to form a functional hexamer. Here, using CLIP‐seq, we present a global analysis of RelA‐bound RNAs showing that RelA interacts with sRNAs as well as with mRNAs carrying a GGAG motif. RelA binding of mRNAs carrying GGAG at position −7 relative to the initiation codon (AUG) inhibits translation by interfering with the binding of 30S ribosomes. The extent of inhibition depends on the distance of GGAG relative to the AUG, as shortening the spacing between GGAG and AUG abrogates RelA‐mediated inhibition. Interestingly, RelA binding of target mRNAs carrying GGAG in the coding sequence or close to AUG facilitates target gene regulation by sRNA partners that lack GGAG. However, translation inhibition caused by RelA binding of mRNAs carrying GGAG at position −7 relative to the AUG renders sRNA‐mRNA basepairing regulation ineffective. Our study indicates that by binding RNAs carrying GGAG the ribosome‐associated RelA protein inhibits translation of specific newly synthesized incoming mRNAs or enables basepairing regulation by their respective sRNA partners, thereby introducing a new regulatory concept for the bacterial response.

Related Organizations
Keywords

Escherichia coli Proteins, RNA-Binding Proteins, GTP Pyrophosphokinase, RNA, Bacterial, Protein Biosynthesis, Escherichia coli, RNA, Small Untranslated, RNA, Messenger, Nucleotide Motifs, Base Pairing, Ribosomes

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
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