Soluble Iron Enhances Extracellular Electron Uptake by Shewanella oneidensis MR-1.

ABSTRACT: Extracellular electron transfer (EET) is a process that microorganisms use to reduce or oxidize external insoluble electron acceptors or donors. Much of our mechanistic understanding of this process is derived from studies of transmembrane cytochrome complexes and extracellular redox shuttles that mediate outward EET to anodes and external electron acceptors. In contrast, there are knowledge gaps concerning the reverse process of inward EET from external electron donors to cells. Here, we describe a role for soluble iron (exogenous FeCl₂) in enhancing EET from cathodes to the model EET bacterium Shewanella oneidensis MR-1, with fumarate serving as the intracellular electron acceptor. This iron concentration-dependent electron uptake was eradicated upon addition of an iron

SUBMITTER: Abuyen K 

PROVIDER: S-EPMC10465110 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature