The RNA-binding protein Hfq assembles into foci-like structures in nitrogen starved Escherichia coli
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Published version
Author(s)
McQuail, Josh
Switzer, Amy
Burchell, Lynn
Wigneshweraraj, Sivaramesh
Type
Journal Article
Abstract
The initial adaptive responses to nutrient depletion in bacteria often occur at the level of gene expression. Hfq is an RNA-binding protein present in diverse bacterial lineages and contributes to many different aspects of RNA metabolism during gene expression. Using photoactivated localization microscopy (PALM) and single molecule tracking, we demonstrate that Hfq forms a distinct and reversible focus-like structure in Escherichia coli specifically experiencing long-term nitrogen (N) starvation. Using the ability of T7 phage to replicate in N-starved bacteria as a biological probe of E. coli cell function during N starvation, we demonstrate that Hfq foci have a role in the adaptive response of E. coli to long-term N starvation. We further show that Hfq foci formation does not depend on gene expression once N starvation has set in and occurs independently of the transcription factor N-regulatory protein C (NtrC), that activates the initial adaptive response to N starvation in E. coli These results serve as a paradigm to demonstrate that bacterial adaptation to long-term nutrient starvation can be spatiotemporally coordinated and can occur independently of de novo gene expression during starvation.
Date Issued
2020-08-28
Date Acceptance
2020-06-12
Citation
Journal of Biological Chemistry, 2020, 295 (35), pp.12355-12367
ISSN
0021-9258
Publisher
American Society for Biochemistry and Molecular Biology
Start Page
12355
End Page
12367
Journal / Book Title
Journal of Biological Chemistry
Volume
295
Issue
35
Copyright Statement
© 2020 McQuail et al. Final version open access under the terms of the Creative Commons CC-BY license http://creativecommons.org/licenses/by/4.0.
License URL
Sponsor
Wellcome Trust
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/32532816
PII: RA120.014107
Grant Number
100958/Z/13/Z
Subjects
Escherichia coli (E. coli)
Hfq protein
RNA chaperone
bacteriophage
environmental adaptation
gene expression
gene regulation
photoactivatable localisation microscopy (PALM)
small regulatory RNA (sRNA)
stress response
Publication Status
Published
Coverage Spatial
United States
Date Publish Online
2020-06-12