The conserved 3' UTR-derived small RNA NarS mediates mRNA crossregulation during nitrate respiration.


Journal

Nucleic acids research
ISSN: 1362-4962
Titre abrégé: Nucleic Acids Res
Pays: England
ID NLM: 0411011

Informations de publication

Date de publication:
28 02 2020
Historique:
accepted: 02 12 2019
revised: 27 11 2019
received: 15 08 2019
pubmed: 22 12 2019
medline: 19 3 2020
entrez: 22 12 2019
Statut: ppublish

Résumé

Small noncoding RNAs (sRNAs) from mRNA 3' UTRs seem to present a previously unrecognized layer of bacterial post-transcriptional control whereby mRNAs influence each other's expression, independently of transcriptional control. Studies in Escherichia coli and Salmonella enterica showed that such sRNAs are natural products of RNase E-mediated mRNA decay and associate with major RNA-binding proteins (RBPs) such as Hfq and ProQ. If so, there must be additional sRNAs from mRNAs that accumulate only under specific physiological conditions. We test this prediction by characterizing candidate NarS that represents the 3' UTR of nitrate transporter NarK whose gene is silent during standard aerobic growth. We find that NarS acts by Hfq-dependent base pairing to repress the synthesis of the nitrite transporter, NirC, resulting in mRNA cross-regulation of nitrate and nitrite transporter genes. Interestingly, the NarS-mediated repression selectively targets the nirC cistron of the long nirBDC-cysG operon, an observation that we rationalize as a mechanism to protect the bacterial cytoplasm from excessive nitrite toxicity during anaerobic respiration with abundant nitrate. Our successful functional assignment of a 3' UTR sRNA from a non-standard growth condition supports the notion that mRNA crossregulation is more pervasive than currently appreciated.

Identifiants

pubmed: 31863581
pii: 5682904
doi: 10.1093/nar/gkz1168
pmc: PMC7038943
doi:

Substances chimiques

3' Untranslated Regions 0
Anion Transport Proteins 0
Escherichia coli Proteins 0
Hfq protein, E coli 0
Host Factor 1 Protein 0
NirC protein, E coli 0
Nitrate Transporters 0
Nitrates 0
ProQ protein, E coli 0
RNA, Messenger 0
RNA, Small Untranslated 0
RNA-Binding Proteins 0
Methyltransferases EC 2.1.1.-
uroporphyrin-III C-methyltransferase EC 2.1.1.107
Endoribonucleases EC 3.1.-
ribonuclease E EC 3.1.4.-

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

2126-2143

Informations de copyright

© The Author(s) 2019. Published by Oxford University Press on behalf of Nucleic Acids Research.

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Auteurs

Chuan Wang (C)

Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200033, PR China.
Institute for Molecular Infection Biology, University of Würzburg, D-97080 Würzburg, Germany.

Yanjie Chao (Y)

Institute for Molecular Infection Biology, University of Würzburg, D-97080 Würzburg, Germany.
Howard Hughes Medical Institute, Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111, USA.

Gianluca Matera (G)

Institute for Molecular Infection Biology, University of Würzburg, D-97080 Würzburg, Germany.

Qian Gao (Q)

Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200033, PR China.

Jörg Vogel (J)

Institute for Molecular Infection Biology, University of Würzburg, D-97080 Würzburg, Germany.
Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz Center for Infection Research (HZI), D-97080 Würzburg, Germany.

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Classifications MeSH