Long-range electron transport in Geobacter sulfurreducens biofilms is redox gradient-driven.

ABSTRACT: 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, thought to involve extracellular matrix c-type cytochromes, as occurs for polymers containing discrete redox moieties. Here, we report measurements of electron transport in actively respiring Geobacter sulfurreducens wild type biofilms using interdigitated microelectrode arrays. Measurements when one electrode is used as an anode and the other electrode is used to monitor redox status of the biofilm

SUBMITTER: Snider RM 

PROVIDER: S-EPMC3458377 | biostudies-literature | 2012 Sep

REPOSITORIES: biostudies-literature