Metal limitation and toxicity at the interface between host and pathogen.

Becker KW, Skaar EP
FEMS Microbiol Rev. 2014 38 (6): 1235-49

PMID: 25211180 · PMCID: PMC4227937 · DOI:10.1111/1574-6976.12087

Metals are required cofactors for numerous fundamental processes that are essential to both pathogen and host. They are coordinated in enzymes responsible for DNA replication and transcription, relief from oxidative stress, and cellular respiration. However, excess transition metals can be toxic due to their ability to cause spontaneous, redox cycling and disrupt normal metabolic processes. Vertebrates have evolved intricate mechanisms to limit the availability of some crucial metals while concurrently flooding sites of infection with antimicrobial concentrations of other metals. To compete for limited metal within the host while simultaneously preventing metal toxicity, pathogens have developed a series of metal regulatory, acquisition, and efflux systems. This review will cover the mechanisms by which pathogenic bacteria recognize and respond to host-induced metal scarcity and toxicity.

© 2014 Federation of European Microbiological Societies. Published by John Wiley & Sons Ltd. All rights reserved.

MeSH Terms (7)

Bacteria Bacterial Infections Bacterial Vaccines Homeostasis Host-Pathogen Interactions Humans Metals

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