Cited by 229Bacterial Genetics and BiotechnologyAntimicrobial Resistance in StaphylococcusFungal and yeast genetics research

MntR modulates expression of the PerR regulon and superoxide resistance in Staphylococcus aureus through control of manganese uptake

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Horsburgh, Malcolm J., Wharton, Stephen J., Cox, Alan G., Ingham, Eileen, Peacock, Sharon, Foster, Simon J.·2002·Molecular Microbiology

Abstract

Summary: The Staphylococcus aureus DtxR‐like protein, MntR, controls expression of the mntABC and mntH genes, which encode putative manganese transporters. Mutation of mntABC produced a growth defect in metal‐depleted medium and increased sensitivity to intracellularly generated superoxide radicals. These phenotypes resulted from diminished uptake of manganese and were rescued by the addition of excess Mn(II). Resistance to superoxide was incompletely rescued by Mn(II) for STE035 ( mntA mntH ), and the strain had reduced virulence in a murine abscess model of infection. Expression of mntABC was repressed by Mn(II) in an MntR‐dependent manner, which contrasts with the expression of mntH that was not repressed in elevated Mn(II) and was decreased in an mntR mutant. This demonstrates that MntR acts as a negative and positive regulator of these loci re‐spectively. PerR, the peroxide resistance regulon repressor, acts with MntR to control the expression of mntABC and manganese uptake. The expression of the PerR‐regulated genes, katA (catalase), ftn (ferritin) and fur (ferric uptake regulator), was diminished in STE031 ( mntR ) when grown in excess Mn(II). Therefore, the control of Mn(II)‐regulated members of the PerR regulon and the Fur protein is modulated by MntR through its control of Mn(II) uptake. The co‐ordinated regulation of metal ion homeostasis and oxidative stress resistance via the regulators MntR, PerR and Fur of S. aureus is discussed.

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Crossref · 10.1046/j.1365-2958.2002.02944.x

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Authors
Horsburgh, M. J., Wharton, S. J., Cox, A. G., Ingham, E., Peacock, S., & Foster, S. J.
Affiliations
  • University of Sheffield (GB)
  • University of Leeds (GB)
  • John Radcliffe Hospital (GB)
Corresponding author
Foster, Simon J.
Venue
Molecular Microbiology
Publisher
Wiley
Published
2002-05-23
Volume
44
Issue
5
Pages
1269-1286
ISSN
  • 0950-382X (ISSN-L)
  • 1365-2958
OpenAlex
W2154476329
Cited by
228
References
65
Citations by year
2026: 7 · 2025: 7 · 2024: 7 · 2023: 4 · 2022: 4 · 2021: 8 · 2020: 15 · 2019: 15 · 2018: 11 · 2017: 9 · 2016: 12 · 2015: 13 · 2014: 9 · 2013: 14 · 2012: 8
FWCI
4.49
Type
journal article
Language
en
Open access
Locations
  • Molecular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Infectious Diseases › Antimicrobial Resistance in Staphylococcus
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
Keywords
MntR, PerR, Staphylococcus aureus, manganese uptake, MntH, oxidative stress resistance, fur, kata, ferritin, metal homeostasis, gene expression regulation, virulence
MeSH terms
Animals, Bacterial Proteins, Base Sequence, Endothelium, Vascular, Genes, Bacterial, Herbicides, Homeostasis, Humans, Manganese, Mice, Inbred BALB C, Molecular Sequence Data, Paraquat, Promoter Regions, Genetic, Recombinant Fusion Proteins, Repressor Proteins, Staphylococcus aureus, Superoxides, Transcription Factors, Gene Expression Regulation, Bacterial, Genes, Reporter, Regulon, Mice

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