Going Wireless: Fe(III) Oxide Reduction without Pili in Geobacter sulfurreducens Strain JS-1

ABSTRACT: The conductive pili of Geobacter sulfurreducens are essential for optimal extracellular electron transfer to Fe(III) and long-range electron transport through current-producing biofilms. The KN400 strain of G. sulfurreducens reduces poorly crystalline Fe(III) oxide more rapidly than the more extensively studied DL-1 strain. Deletion of the gene for PilA, the structural pilin protein, in strain KN400 inhibited Fe(III) oxide reduction. However, slow rates of Fe(III) reduction were detected after extended (> 30 days) incubation in the presence of Fe(III) oxide. After seven consecutive transfers the PilA-deficient strain adapted to reduce Fe(III) oxide as fast as the wild type. Microarray, proteomic, and gene deletion studies indicated that this adaptation was associated with greater productio

ORGANISM(S): Geobacter sulfurreducens KN400

SUBMITTER: Jessica Smith 

PROVIDER: E-GEOD-47868 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress