Cited by 79Metalloenzymes and iron-sulfur proteinsBacterial Genetics and BiotechnologyAntimicrobial Resistance in Staphylococcus

Nfu facilitates the maturation of iron‐sulfur proteins and participates in virulence in S taphylococcus aureus

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Mashruwala, Ameya A., Pang, Yun Y., Rosario‐Cruz, Zuelay, Chahal, Harsimranjit K., Benson, Meredith A., Mike, Laura A., Skaar, Eric P., Torres, Victor J. +2 more·2015·Molecular Microbiology

Abstract

Summary: The acquisition and metabolism of iron ( Fe ) by the human pathogen S taphylococcus aureus is critical for disease progression. S . aureus requires Fe to synthesize inorganic cofactors called iron‐sulfur ( Fe‐S ) clusters, which are required for functional Fe‐S proteins. In this study we investigated the mechanisms utilized by S . aureus to metabolize Fe‐S clusters. We identified that S . aureus utilizes the Suf biosynthetic system to synthesize Fe‐S clusters and we provide genetic evidence suggesting that the suf U and suf B gene products are essential. Additional biochemical and genetic analyses identified Nfu as an Fe‐S cluster carrier, which aids in the maturation of Fe‐S proteins. We find that deletion of the nfu gene negatively impacts staphylococcal physiology and pathogenicity. A nfu mutant accumulates both increased intracellular non‐incorporated Fe and endogenous reactive oxygen species ( ROS ) resulting in DNA damage. In addition, a strain lacking Nfu is sensitive to exogenously supplied ROS and reactive nitrogen species. Congruous with ex vivo findings, a nfu mutant strain is more susceptible to oxidative killing by human polymorphonuclear leukocytes and displays decreased tissue colonization in a murine model of infection. We conclude that Nfu is necessary for staphylococcal pathogenesis and establish Fe‐S cluster metabolism as an attractive antimicrobial target.

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  • The antibiotic streptonigrin, when combined with intracellular Fe(II) and a reducing agent, promotes killing by causing double-stranded DNA breaks; therefore, increased killing by streptonigrin is correlated with an increased pool of Fe that is not chelated by macromolecules.

    “The antibiotic streptonigrin, when combined with intracellular Fe(II) and a reducing agent, promotes killing by causing double-stranded DNA breaks (3,7). Therefore, increased killing by streptonigrin is correlated with an increased pool of Fe that is not chelated by macromolecules.”

    From The <i>Staphylococcus aureus</i> non-coding RNA IsrR regulates TCA cycle activity and virulence (2025) · cites this paper as [3]

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  • S. aureus lacking ftnA displays heightened sensitivity to streptonigrin.

    “Previous literature has shown that S. aureus lacking ftnA displays heightened sensitivity to SN (39).”
  • Staphylococcus aureus strains defective in the acquisition, uptake or proper usage of intracellular Fe have decreased virulence in models of infection.

    “Staphylococcus aureus strains defective in the acquisition, uptake or proper usage of intracellular Fe have decreased virulence in models of infection (3–6).”

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  1. Institute, C.a.L.S. CLSI. Methods for dilution Antimicrobial Susceptibility Tests for Bacteria That Grow Aerobically; Approvied Standard-Eighth Edition. CLSA document M07-A8 2009 Clinical and Laboratory Standards Institute Wayne, PA

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Authors
Mashruwala, A. A., Pang, Y. Y., Rosario‐Cruz, Z., Chahal, H. K., Benson, M. A., Mike, L. A., Skaar, E. P., Torres, V. J., Nauseef, W. M., & Boyd, J. M.
Affiliations
  • Rutgers, The State University of New Jersey (US)
  • University of Iowa (US)
  • NYU Langone Health (US)
  • Vanderbilt University (US)
Corresponding author
Boyd, Jeffrey M.
Venue
Molecular Microbiology
Publisher
Wiley
Published
2014-12-20
Volume
95
Issue
3
Pages
383-409
ISSN
  • 0950-382X (ISSN-L)
  • 1365-2958
OpenAlex
W1873084373
Cited by
79
References
147
Citations by year
2026: 5 · 2025: 10 · 2024: 5 · 2023: 4 · 2022: 4 · 2021: 9 · 2020: 6 · 2019: 12 · 2018: 7 · 2017: 8 · 2016: 6 · 2015: 3
FWCI
1.87
Type
journal article
Language
en
Open access
Locations
  • Molecular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Rutgers University Community Repository (Rutgers University) (submittedVersion)
Funders
  • National Institutes of Health (AI070958, AI044642, AI069233)
  • American Heart Association (10PRE3420022)
  • U.S. Department of Agriculture (NE−1028)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Metalloenzymes and iron-sulfur proteins
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Infectious Diseases › Antimicrobial Resistance in Staphylococcus
Keywords
iron-sulfur proteins, iron-sulfur clusters, Staphylococcus aureus, iron metabolism, virulence, reactive oxygen species, DNA damage, oxidative stress susceptibility, polymorphonuclear leukocytes, tissue colonization, antimicrobial drug targets, SUFU
MeSH terms
Aconitate Hydratase, Animals, Disease Models, Animal, DNA Damage, Multigene Family, Humans, Iron, Iron-Sulfur Proteins, Mutation, Neutrophils, Oxidation-Reduction, Protein Binding, Staphylococcal Infections, Staphylococcus aureus, Sulfur, Virulence, Reactive Oxygen Species, Reactive Nitrogen Species, Mice

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