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Title: Extracellular Electron Transfer Powers Enterococcus faecalis Biofilm Metabolism
Authors: Keogh, Damien
Lam, Ling Ning
Pavagadhi, Shruti
Umashankar, Shivshankar
Doyle, Lucinda Elizabeth
Matysik, Artur Stanislaw
Marsili, Enrico
Kline, Kimberly A.
Song, Yiyang
Ng, Sean Pin
Boothroyd, Chris B.
Dunny, Gary M.
Low, Pui Man
Dale, Jennifer L.
Williams, Rohan B. H.
Swarup, Sanjay
Keywords: Enterococcus Faecalis
Issue Date: 2018
Source: Keogh, D., Lam, L. N., Doyle, L. E., Matysik, A., Pavagadhi, S., Umashankar, S., et al. (2018). Extracellular Electron Transfer Powers Enterococcus faecalis Biofilm Metabolism. mBio, 9(2), e00626-17-.
Series/Report no.: mBio
Abstract: Enterococci are important human commensals and significant opportunistic pathogens. Biofilm-related enterococcal infections, such as endocarditis, urinary tract infections, wound and surgical site infections, and medical device-associated infections, often become chronic upon the formation of biofilm. The biofilm matrix establishes properties that distinguish this state from free-living bacterial cells and increase tolerance to antimicrobial interventions. The metabolic versatility of the enterococci is reflected in the diversity and complexity of environments and communities in which they thrive. Understanding metabolic factors governing colonization and persistence in different host niches can reveal factors influencing the transition to biofilm pathogenicity. Here, we report a form of iron-dependent metabolism for Enterococcus faecalis where, in the absence of heme, extracellular electron transfer (EET) and increased ATP production augment biofilm growth. We observe alterations in biofilm matrix depth and composition during iron-augmented biofilm growth. We show that the ldh gene encoding L-lactate dehydrogenase is required for iron-augmented energy production and biofilm formation and promotes EET.
ISSN: 2161-2129
DOI: 10.1128/mBio.00626-17
Rights: © 2018 Keogh et al. This is an openaccess article distributed under the terms of the Creative Commons Attribution 4.0 International license.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SBS Journal Articles

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