Mechanistic stratification in electroactive biofilms of Geobacter sulfurreducens mediated by pilus nanowires
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Mechanistic stratification in electroactive biofilms of Geobacter sulfurreducens mediated by pilus nanowires
Electricity generation by Geobacter sulfurreducens biofilms grown on electrodes involves matrix-associated electron carriers, such as c-type cytochromes. Yet, the contribution of the biofilm's conductive pili remains uncertain, largely because pili-defective mutants also have cytochrome defects. Here we report that a pili-deficient mutant carrying an inactivating mutation in the pilus assembly ...
متن کاملCorrigendum: Mechanistic stratification in electroactive biofilms of Geobacter sulfurreducens mediated by pilus nanowires
Nature Communications 7:12217 doi: 10.1038/ncomms12217 (2016); Published 2 Aug 2016; Updated 28 Apr 2017 Two previous studies (Vargas et al. 2013, Liu et al. 2014) reporting that conductive pili are required for long-range electron transport in Geobacter sulfurreducens were inadvertently omitted from the reference list of this Article, and should have been cited in the Introduction section wher...
متن کاملPossible nonconductive role of Geobacter sulfurreducens pilus nanowires in biofilm formation.
Geobacter sulfurreducens required expression of electrically conductive pili to form biofilms on Fe(III) oxide surfaces, but pili were also essential for biofilm development on plain glass when fumarate was the sole electron acceptor. Furthermore, pili were needed for cell aggregation in agglutination studies. These results suggest that the pili of G. sulfurreducens also have a structural role ...
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Both the short- and long-term electron-transfer processes of electrode-respiring Geobacter sulfurreducens biofilms are demonstrated by using an electrochemical quartz crystal microbalance (QCM). The QCM monitors the frequency shift from the initial resonant frequency (background) in real time, while the current increases, because of biofilm growth. In the short term, the frequency shift is line...
متن کاملLong-range electron transport in Geobacter sulfurreducens biofilms is redox gradient-driven.
Geobacter spp. can acquire energy by coupling intracellular oxidation of organic matter with extracellular electron transfer to an anode (an electrode poised at a metabolically oxidizing potential), forming a biofilm extending many cell lengths away from the anode surface. It has been proposed that long-range electron transport in such biofilms occurs through a network of bound redox cofactors,...
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ژورنال
عنوان ژورنال: Nature Communications
سال: 2016
ISSN: 2041-1723
DOI: 10.1038/ncomms12217