Cited by 383Bacterial Genetics and BiotechnologyRedox biology and oxidative stressEscherichia coli research studies

Regulators of oxidative stress response genes in Escherichia coli and their functional conservation in bacteria

Chiang, Sarah M., Schellhorn, Herb E.·2012·Archives of Biochemistry and Biophysics

Abstract

Oxidative stress, through the production of reactive oxygen species, is a natural consequence of aerobic metabolism. Escherichia coli has several major regulators activated during oxidative stress, including OxyR, SoxRS, and RpoS. OxyR and SoxR undergo conformation changes when oxidized in the presence of hydrogen peroxide and superoxide radicals, respectively, and subsequently control the expression of cognate genes. In contrast, the RpoS regulon is induced by an increase in RpoS levels. Current knowledge regarding the activation and function of these regulators and their dependent genes in E. coli during oxidative stress forms the scope of this review. Despite the enormous genomic diversity of bacteria, oxidative stress response regulators in E. coli are functionally conserved in a wide range of bacterial groups, possibly reflecting positive selection of these regulators. SoxRS and RpoS homologs are present and respond to oxidative stress in Proteobacteria, and OxyR homologs are present and function in H(2)O(2) resistance in a range of bacteria, from gammaproteobacteria to Actinobacteria. Bacteria have developed complex, adapted gene regulatory responses to oxidative stress, perhaps due to the prevalence of reactive oxygen species produced endogenously through metabolism or due to the necessity of aerotolerance mechanisms in anaerobic bacteria exposed to oxygen.

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Crossref · 10.1016/j.abb.2012.02.007

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  • ROS response is under the control of master regulators and transcription factors such as OxyR, PerR, OhrR, and SoxRS, which can be stimulated by direct oxidation of their sensor proteins and then regulate the bacterial comeback appropriately.

    “can be stimulated by direct oxidation of their sensor proteins and then regulating the bacterial comeback appropriately [192].”

    From The Role of Reactive Species on Innate Immunity (2022) · cites this paper as [192]

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Authors
Chiang, S. M., & Schellhorn, H. E.
Affiliations
McMaster University (CA)
Corresponding author
Schellhorn, Herb E.
Venue
Archives of Biochemistry and Biophysics
Publisher
Elsevier BV
Published
2012-09
Volume
525
Issue
2
Pages
161-169
ISSN
0003-9861 (ISSN-L)
OpenAlex
W2010983045
Cited by
381
References
203
Citations by year
2026: 34 · 2025: 26 · 2024: 34 · 2023: 26 · 2022: 37 · 2021: 28 · 2020: 29 · 2019: 23 · 2018: 25 · 2017: 25 · 2016: 19 · 2015: 26 · 2014: 26 · 2013: 14 · 2012: 9
FWCI
2.94
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of Biochemistry and Biophysics (publishedVersion)
  • PubMed (publishedVersion)
Funders
Natural Sciences and Engineering Research Council of Canada
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Escherichia coli research studies
Keywords
oxidative stress response, Escherichia coli, OxyR, SoxR, RpoS, reactive oxygen species, hydrogen peroxide resistance, superoxide, transcription factors, positive selection, aerotolerance, gene expression regulation
MeSH terms
Escherichia coli, Genes, Bacterial, Hydrogen Peroxide, Models, Biological, Models, Chemical, Models, Genetic, Protein Conformation, Repressor Proteins, Species Specificity, Superoxide Dismutase, Gene Expression Regulation, Bacterial, Reactive Oxygen Species, Regulon, Oxidative Stress, Bacterial Physiological Phenomena, Escherichia coli Proteins

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