Cited by 72Bacterial Genetics and BiotechnologyDrug Transport and Resistance MechanismsBacterial Infections and Vaccines

Metal Binding Specificity of the MntABC Permease of Neisseria gonorrhoeae and Its Influence on Bacterial Growth and Interaction with Cervical Epithelial Cells

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Lim, Karen H. L., Jones, Christopher E., vanden Hoven, Rachel N., Edwards, Jennifer L., Falsetta, Megan L., Apicella, Michael A., Jennings, Michael P., McEwan, Alastair G.·2008·Infection and Immunity

Abstract

mntABC from Neisseria gonorrhoeae encodes an ABC permease which includes a periplasmic divalent cation binding receptor protein of the cluster IX family, encoded by mntC. Analysis of an mntC mutant showed that growth of N. gonorrhoeae could be stimulated by addition of either manganese(II) or zinc(II) ions, suggesting that the MntABC system could transport both ions. In contrast, growth of the mntAB mutant in liquid culture was possible only when the medium was supplemented with an antioxidant such as mannitol, consistent with the view that ion transport via MntABC is essential for protection of N. gonorrhoeae against oxidative stress. Using recombinant MntC, we determined that MntC binds Zn 2+and Mn 2+with almost equal affinity (dissociation constant of ∼0.1 μM). Competition assays with the metallochromic zinc indicator 4-(2-pyridylazo)resorcinol showed that MntC binds Mn 2+and Zn 2+at the same binding site. Analysis of the N. gonorrhoeae genome showed that MntC is the only Mn/Zn metal binding receptor protein cluster IX in this bacterium, in contrast to the situation in many other bacteria which have systems with dedicated Mn and Zn binding proteins as part of distinctive ABC cassette permeases. Both the mntC and mntAB mutants had reduced intracellular survival in a human cervical epithelial cell model and showed reduced ability to form a biofilm. These data suggest that the MntABC transporter is of importance for survival of Neisseria gonorrhoeae in the human host.

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  1. [1]Alexander, H. E. 1965. The Haemophilus group, p. 724-741. In R. J. Dubos and J. G. Hirsch (ed.), Bacterial and mycotic infection in man. Pitman Medical Publishing, London, United Kingdom.
  2. [19]Kellogg, D. S., W. L. Peacock, C. I. Pirkle, W. E. Deacon, and L. Brown. 1963. Neisseria gonorrhoeae. 1. Virulence genetically linked to clonal variation. J. Bacteriol. 851274-1281. [DOI] [PMC free article] [PubMed] [Google Scholar]

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Authors
Lim, K. H. L., Jones, C. E., vanden Hoven, R. N., Edwards, J. L., Falsetta, M. L., Apicella, M. A., Jennings, M. P., & McEwan, A. G.
Affiliations
  • The University of Queensland (AU)
  • Australian Bacterial Pathogenesis Program and Centre for Metals in Biology, School of Molecular and Microbial Sciences, The University of Queensland, St. Lucia 4072, Australia
  • Abigail Wexner Research Institute (US)
  • University of Iowa (US)
Corresponding author
McEwan, Alastair G.
Venue
Infection and Immunity
Published
2008-08
Volume
76
Issue
8
Pages
3569-3576
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2115780465
Cited by
72
References
39
Citations by year
2026: 3 · 2025: 5 · 2024: 2 · 2023: 4 · 2022: 6 · 2021: 2 · 2020: 2 · 2019: 5 · 2018: 1 · 2017: 4 · 2016: 2 · 2015: 5 · 2014: 4 · 2013: 3 · 2012: 4
FWCI
3.61
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Nationwide Children's Hospital
  • National Institutes of Health
  • Research Institute, Nationwide Children's Hospital
  • Medical Research Council
  • National Health and Medical Research Council
  • National Institute of Allergy and Infectious Diseases (R01AI045728, AI045728)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Immunology and Microbiology › Microbiology › Bacterial Infections and Vaccines
Keywords
Neisseria gonorrhoeae, ABC transporters, manganese transport, zinc transport, oxidative stress, antioxidant defense, biofilm formation, cervical epithelial cells, metallochromic indicators
MeSH terms
Bacterial Proteins, Binding Sites, Cations, Divalent, Cell Line, Cervix Uteri, Epithelial Cells, Female, Humans, Kinetics, Metals, Neisseria gonorrhoeae, Biofilms, Membrane Transport Proteins, Periplasmic Binding Proteins

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