Cited by 295Bacterial Genetics and BiotechnologyDNA Repair MechanismsEvolution and Genetic Dynamics

The SOS response regulates adaptive mutation

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McKenzie, Gregory J., Harris, Reuben S., Lee, Peter L., Rosenberg, Susan M.·2000·Proceedings of the National Academy of Sciences

Abstract

Upon starvation some Escherichia coli cells undergo a transient, genome-wide hypermutation (called adaptive mutation) that is recombination-dependent and appears to be a response to a stressful environment. Adaptive mutation may reflect an inducible mechanism that generates genetic variability in times of stress. Previously, however, the regulatory components and signal transduction pathways controlling adaptive mutation were unknown. Here we show that adaptive mutation is regulated by the SOS response, a complex, graded response to DNA damage that includes induction of gene products blocking cell division and promoting mutation, recombination, and DNA repair. We find that SOS-induced levels of proteins other than RecA are needed for adaptive mutation. We report a requirement of RecF for efficient adaptive mutation and provide evidence that the role of RecF in mutation is to allow SOS induction. We also report the discovery of an SOS-controlled inhibitor of adaptive mutation, PsiB. These results indicate that adaptive mutation is a tightly regulated response, controlled both positively and negatively by the SOS system.

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Crossref · 10.1073/pnas.120161797

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Authors
McKenzie, G. J., Harris, R. S., Lee, P. L., & Rosenberg, S. M.
Affiliations
University of Alberta (CA)
Venue
Proceedings of the National Academy of Sciences
Published
2000-05-30
Volume
97
Issue
12
Pages
6646-6651
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2037722651
Cited by
295
References
85
Citations by year
2026: 5 · 2025: 8 · 2024: 12 · 2023: 16 · 2022: 16 · 2021: 9 · 2020: 8 · 2019: 12 · 2018: 28 · 2017: 6 · 2016: 12 · 2015: 3 · 2014: 6 · 2013: 7 · 2012: 12
FWCI
8.70
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense
  • Fondation pour la Recherche Médicale
  • National Institutes of Health (5r01ai043917-05)
  • National Institute of General Medical Sciences (R01GM053158)
  • National Institute of Allergy and Infectious Diseases (R01-AI43917)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
Keywords
adaptive mutation, SOS response, Escherichia coli, starvation, recF, RecA, DNA damage response, signal transduction regulation
MeSH terms
LexA Repressor Protein, Adaptation, Physiological, Bacterial Proteins, DNA Repair, DNA-Binding Proteins, Mutation, Serine Endopeptidases, SOS Response, Genetics, Signal Transduction, Regulon, Escherichia coli Proteins

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