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  4. The adaptive response to long-term nitrogen starvation in Escherichia coli requires the breakdown of allantoin.
 
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The adaptive response to long-term nitrogen starvation in Escherichia coli requires the breakdown of allantoin.
File(s)
Journal of Bacteriology-2020-Switzer-e00172-20.full.pdf (2.36 MB)
Published version
Author(s)
Switzer, Amy
Burchell, Lynn
McQuail, Josh
Wigneshweraraj, Sivaramesh
Type
Journal Article
Abstract
Bacteria initially respond to nutrient starvation by eliciting large-scale transcriptional changes. The accompanying changes in gene expression and metabolism allow the bacterial cells to effectively adapt to the nutrient starved state. How the transcriptome subsequently changes as nutrient starvation ensues is not well understood. We used nitrogen (N) starvation as a model nutrient starvation condition to study the transcriptional changes in Escherichia coli experiencing long-term N starvation. The results reveal that the transcriptome of N starved E. coli undergoes changes that are required to maximise chances of viability and to effectively recover growth when N starvation conditions become alleviated. We further reveal that, over time, N starved E. coli cells rely on the degradation of allantoin for optimal growth recovery when N becomes replenished. This study provides insights into the temporally coordinated adaptive responses that occur in E. coli experiencing sustained N starvation.IMPORTANCE Bacteria in their natural environments seldom encounter conditions that support continuous growth. Hence, many bacteria spend the majority of their time in states of little or no growth due to starvation of essential nutrients. To cope with prolonged periods of nutrient starvation, bacteria have evolved several strategies, primarily manifesting themselves through changes in how the information in their genes is accessed. How these coping strategies change over time under nutrient starvation is not well understood and this knowledge is not only important to broaden our understanding of bacterial cell function, but also to potentially find ways to manage harmful bacteria. This study provides insights into how nitrogen starved Escherichia coli bacteria rely on different genes during long term nitrogen starvation.
Date Issued
2020-09
Date Acceptance
2020-06-15
Citation
Journal of Bacteriology, 2020, 202 (17), pp.1-11
URI
http://hdl.handle.net/10044/1/80308
URL
https://jb.asm.org/content/early/2020/06/16/JB.00172-20/article-info
DOI
https://www.dx.doi.org/10.1128/JB.00172-20
ISSN
0021-9193
Publisher
American Society for Microbiology
Start Page
1
End Page
11
Journal / Book Title
Journal of Bacteriology
Volume
202
Issue
17
Copyright Statement
© 2020 Switzer et al.
This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/).
License URL
Attribution 4.0 International
Sponsor
Wellcome Trust
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/32571968
PII: JB.00172-20
Grant Number
100958/Z/13/Z
Subjects
Science & Technology
Life Sciences & Biomedicine
Microbiology
Escherichia coli
nitrogen regulation
bacterial stress response
transcriptome
allantoin
STATIONARY-PHASE
STRESS
ASSIMILATION
BACTERIA
REVEALS
GENES
Escherichia coli
allantoin
bacterial stress response
nitrogen regulation
transcriptome
06 Biological Sciences
07 Agricultural and Veterinary Sciences
11 Medical and Health Sciences
Microbiology
Publication Status
Published
Coverage Spatial
United States
Date Publish Online
2020-08-10
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