The Cytochrome bd Oxidase of Porphyromonas gingivalis Contributes to Oxidative Stress Resistance and Dioxygen Tolerance |
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| Authors: | Julia Leclerc Eric Rosenfeld Mathieu Trainini Bénédicte Martin Vincent Meuric Martine Bonnaure-Mallet Christine Baysse |
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| Institution: | 1. EA1254 Microbiologie—Risques Infectieux, University of Rennes1, Rennes, France.; 2. UMR CNRS 7266 LIENSs, University of La Rochelle, La Rochelle, France.; 3. CHU Rennes, Rennes, France.; East Carolina University School of Medicine, UNITED STATES, |
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| Abstract: | Porphyromonas gingivalis is an etiologic agent of periodontal disease in humans. The disease is associated with the formation of a mixed oral biofilm which is exposed to oxygen and environmental stress, such as oxidative stress. To investigate possible roles for cytochrome bd oxidase in the growth and persistence of this anaerobic bacterium inside the oral biofilm, mutant strains deficient in cytochrome bd oxidase activity were characterized. This study demonstrated that the cytochrome bd oxidase of Porphyromonas gingivalis, encoded by cydAB, was able to catalyse O2 consumption and was involved in peroxide and superoxide resistance, and dioxygen tolerance. |
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