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extracellular electron transfer

  • Open Access
    How Thermophilic Gram-Positive Organisms Perform Extracellular Electron Transfer: Characterization of the Cell Surface Terminal Reductase OcwA
    Research Article | Applied and Environmental Science
    How Thermophilic Gram-Positive Organisms Perform Extracellular Electron Transfer: Characterization of the Cell Surface Terminal Reductase OcwA

    Thermophilic Gram-positive organisms were recently shown to be a promising class of organisms to be used in bioelectrochemical systems for the production of electrical energy. These organisms present a thick peptidoglycan layer that was thought to preclude them to perform extracellular electron transfer (i.e., exchange catabolic electrons with solid electron acceptors outside the cell). In this paper, we describe the structure and...

    N. L. Costa, B. Hermann, V. Fourmond, M. M. Faustino, M. Teixeira, O. Einsle, C. M. Paquete, R. O. Louro
  • Open Access
    A Membrane-Bound Cytochrome Enables <em>Methanosarcina acetivorans</em> To Conserve Energy from Extracellular Electron Transfer
    Research Article | Ecological and Evolutionary Science
    A Membrane-Bound Cytochrome Enables Methanosarcina acetivorans To Conserve Energy from Extracellular Electron Transfer

    The discovery of a methanogen that can conserve energy to support growth solely from the oxidation of organic carbon coupled to the reduction of an extracellular electron acceptor expands the possible environments in which methanogens might thrive. The potential importance of c-type cytochromes for extracellular electron transfer to syntrophic bacterial partners and/or Fe(III) minerals in some Archaea was previously...

    Dawn E. Holmes, Toshiyuki Ueki, Hai-Yan Tang, Jinjie Zhou, Jessica A. Smith, Gina Chaput, Derek R. Lovley
  • Open Access
    Iron Corrosion via Direct Metal-Microbe Electron Transfer
    Research Article | Applied and Environmental Science
    Iron Corrosion via Direct Metal-Microbe Electron Transfer

    The anaerobic corrosion of iron structures is expensive to repair and can be a safety and environmental concern. It has been known for over 100 years that the presence of anaerobic respiratory microorganisms can accelerate iron corrosion. Multiple studies have suggested that there are sulfate reducers, methanogens, and acetogens that can directly accept electrons from Fe(0) to support sulfate or carbon dioxide reduction. However, all of...

    Hai-Yan Tang, Dawn E. Holmes, Toshiyuki Ueki, Paola A. Palacios, Derek R. Lovley
  • Open Access
    Tactic Response of <span class="named-content genus-species" id="named-content-1">Shewanella oneidensis</span> MR-1 toward Insoluble Electron Acceptors
    Observation | Applied and Environmental Science
    Tactic Response of Shewanella oneidensis MR-1 toward Insoluble Electron Acceptors

    Previous hypotheses of tactic behavior of exoelectrogenic bacteria are based on techniques that do not accurately control the electrochemical potential, such as chemical-in-plug assays or microscopy tracking experiments in two-electrode cells. Here, we have revisited previous experiments and, for the first time, performed microscopy cell-tracking experiments in three-electrode electrochemical cells, with defined electrode potentials....

    Joseph Oram, Lars J. C. Jeuken
  • Open Access
    Research Article
    Geobacter Strains Expressing Poorly Conductive Pili Reveal Constraints on Direct Interspecies Electron Transfer Mechanisms
    Toshiyuki Ueki, Kelly P. Nevin, Amelia-Elena Rotaru, Li-Ying Wang, Joy E. Ward, Trevor L. Woodard, Derek R. Lovley
  • Open Access
    Research Article
    Extracellular Electron Transfer Powers Enterococcus faecalis Biofilm Metabolism
    Damien Keogh, Ling Ning Lam, Lucinda E. Doyle, Artur Matysik, Shruti Pavagadhi, Shivshankar Umashankar, Pui Man Low, Jennifer L. Dale, Yiyang Song, Sean Pin Ng, Chris B. Boothroyd, Gary M. Dunny, Sanjay Swarup, Rohan B. H. Williams, Enrico Marsili, Kimberly A. Kline
  • Open Access
    Research Article
    Methane-Fueled Syntrophy through Extracellular Electron Transfer: Uncovering the Genomic Traits Conserved within Diverse Bacterial Partners of Anaerobic Methanotrophic Archaea
    Connor T. Skennerton, Karuna Chourey, Ramsunder Iyer, Robert L. Hettich, Gene W. Tyson, Victoria J. Orphan
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