Cited by 17Antimicrobial Resistance in StaphylococcusBacterial Genetics and BiotechnologyHemoglobin structure and function

The lipoprotein components of the Isd and Hts transport systems are dispensable for acquisition of heme by Staphylococcus aureus

Wright, John A., Nair, Sean P.·2012·FEMS Microbiology Letters

Abstract

Heme is a key molecule for Staphylococcus aureus and is involved in many aspects of oxidative metabolism. Crucially, heme is required for the activity of cytochromes of the electron transport chain. Staphylococcus aureus is able to obtain heme either through biosynthesis or through acquisition from the host. Clinically persistent 'small colony variant' (SCV) forms of S. aureus are frequently deficient for heme biosynthesis, and disruption of the hemB gene produces stable heme-auxotrophic strains that reproduce many SCV phenotypes. We sought to address the role of heme transport in SCVs by deleting components of the two described heme import systems, the iron-regulated surface determinant (Isd) and heme transport system (Hts) in wild-type S. aureus and hemB mutant backgrounds. Analysis of the growth of S. aureus hemB strains either singly or doubly deficient in isdE and htsA in the presence and absence of heme or hemoglobin revealed that S. aureus is able to obtain exogenous heme in the absence of these transporter components. These data suggest the presence of additional, as yet unidentified transporter components that enable S. aureus to internalize exogenous heme and contradict the proposed model that IsdE can transfer heme to the HtsBC permease.

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Crossref · 10.1111/j.1574-6968.2012.02519.x

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Authors
Wright, J. A., & Nair, S. P.
Affiliations
University College London (GB)
Corresponding author
Nair, Sean P.
Venue
FEMS Microbiology Letters
Published
2012-02-23
Volume
329
Issue
2
Pages
177-185
ISSN
0378-1097 (ISSN-L)
OpenAlex
W2018849855
Cited by
17
References
49
Citations by year
2025: 2 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 1
FWCI
1.33
Type
journal article
Language
en
Open access
closed
Locations
  • FEMS Microbiology Letters (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
Versus Arthritis (18294)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antimicrobial Resistance in Staphylococcus
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
Staphylococcus aureus, heme acquisition, small colony variants, hemoglobin, bacterial transporters
MeSH terms
Porphobilinogen Synthase, Bacterial Proteins, Biological Transport, Active, Carrier Proteins, Culture Media, Escherichia coli, Heme, Humans, Lipoproteins, Mutation, Phenotype, Staphylococcus aureus, Gene Deletion

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