title: Riboflavin-shuttled extracellular electron transfer from Enterococcus faecalis to electrodes in microbial fuel cells.
abstract: Great attention has been focused on Gram-negative bacteria in the application of microbial fuel cells. In this study, the Gram-positive bacterium Enterococcus faecalis was employed in microbial fuel cells. Bacterial biofilms formed by E. faecalis ZER6 were investigated with respect to electricity production through the riboflavin-shuttled extracellular electron transfer. Trace riboflavin was shown to be essential for transferring electrons derived from the oxidation of glucose outside the peptidoglycan layer in the cell wall of E. faecalis biofilms formed on the surface of electrodes, in the absence of other potential electron mediators (e.g., yeast extract).
authors.affiliation: a Department of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou City 225002, People's Republic of China.
authors.forename: Enren
authors.initials: E
authors.lastname: Zhang
authors.forename: Yamin
authors.initials: Y
authors.lastname: Cai
authors.forename: Yue
authors.initials: Y
authors.lastname: Luo
authors.forename: Zhe
authors.initials: Z
authors.lastname: Piao
mesh_terms: D001674:Bioelectric Energy Sources; D018441:Biofilms; D004560:Electricity; D004566:Electrodes; D004579:Electron Transport; D004583:Electrons; D013293:Enterococcus faecalis / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism; D010084:Oxidation-Reduction; D012256:Riboflavin / Q000378:metabolism*
chemical_list: D005947:Glucose; D012256:Riboflavin
keywords: Enterococcus faecalis; Gram-positive strain; extracellular electron transfer; microbial fuel cells; piles à combustible microbiennes; riboflavin; riboflavine; souche à Gram positif; transfert extracellulaire d’électrons