Cited by 73Bacterial Genetics and BiotechnologyIron Metabolism and DisordersAntimicrobial Resistance in Staphylococcus

Staphylococcus aureus heme and siderophore-iron acquisition pathways

Conroy, Brigid S., Grigg, Jason C., Kolesnikov, Maxim, Morales, L. Daniela, Murphy, Michael E. P.·2019·BioMetals

Abstract

Staphylococcus aureus is a versatile opportunistic human pathogen. Infection by this bacterium requires uptake of iron from the human host, but iron is highly restricted in this environment. Staphylococcus aureus iron sufficiency is achieved primarily through uptake of heme and high-affinity iron chelators, known as siderophores. Two siderophores (staphyloferrins) are produced and secreted by S. aureus into the extracellular environment to capture iron. Staphylococcus aureus expresses specific uptake systems for staphyloferrins and more general uptake systems for siderophores produced by other microorganisms. The S. aureus heme uptake system uses highly-specific cell surface receptors to extract heme from hemoglobin and hemoglobin-haptoglobin complexes for transport into the cytoplasm where it is degraded to liberate iron. Initially thought to be independent systems, recent findings indicate that these iron uptake pathways intersect. IruO is a reductase that releases iron from heme and some ferric-siderophores. Moreover, multifunctional SbnI produces a precursor for staphyloferrin B biosynthesis, and also binds heme to regulate expression of the staphyloferrin B biosynthesis pathway. Intersection of the S. aureus iron uptake pathways is hypothesized to be important for rapid adaptation to available iron sources. Components of the heme and siderophore uptake systems are currently being targeted in the development of therapeutics against S. aureus.

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Crossref · 10.1007/s10534-019-00188-2

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  • S. aureus expresses a TF receptor and produces siderophores termed staphyloferrins.

    “S. aureus, an opportunist causing skin and soft-tissue infections, pneumonia, endocarditis or sepsis, also expresses a TF receptor and produces siderophores, termed staphyloferrins (Conroy et al., 2019;Modun and Williams, 1999;Skaar et al., 2004).”

    From Iron in infection and immunity (2020) · cites this paper as Conroy et al., 2019

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Authors
Conroy, B. S., Grigg, J. C., Kolesnikov, M., Morales, L. D., & Murphy, M. E. P.
Affiliations
University of British Columbia (CA)
Corresponding author
Murphy, Michael E. P.
Venue
BioMetals
Published
2019-03-25
Volume
32
Issue
3
Pages
409-424
ISSN
  • 0966-0844 (ISSN-L)
  • 1572-8773
OpenAlex
W2936568025
Cited by
73
References
120
Citations by year
2026: 8 · 2025: 14 · 2024: 9 · 2023: 11 · 2022: 9 · 2021: 11 · 2020: 10 · 2019: 1
FWCI
4.66
Type
journal article
Language
en
Open access
closed
Locations
  • BioMetals (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Canadian Institutes of Health Research (MOP-49597)
  • Natural Sciences and Engineering Research Council of Canada (CGS-M)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Medicine › Infectious Diseases › Antimicrobial Resistance in Staphylococcus
Keywords
Staphylococcus aureus, heme uptake, hemoglobin-haptoglobin complex, cell surface receptors, iron sufficiency, iron limitation, antimicrobial drug targets
MeSH terms
Heme, Iron, Staphylococcus aureus, Siderophores

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