Lack of production of electron-shuttling compounds or solubilization of Fe(III) during reduction of insoluble Fe(III) oxide by Geobacter metallireducens.

TitleLack of production of electron-shuttling compounds or solubilization of Fe(III) during reduction of insoluble Fe(III) oxide by Geobacter metallireducens.
Publication TypeJournal Article
Year of Publication2000
AuthorsNevin KP, Lovley DR
JournalAppl Environ Microbiol
Volume66
Issue5
Pagination2248-51
Date Published2000 May
ISSN0099-2240
KeywordsDeltaproteobacteria, Electron Transport, Ferric Compounds, Iron, Kinetics, Oxidation-Reduction, Solubility
Abstract

Studies with the dissimilatory Fe(III)-reducing microorganism Geobacter metallireducens demonstrated that the common technique of separating Fe(III)-reducing microorganisms and Fe(III) oxides with semipermeable membranes in order to determine whether the Fe(III) reducers release electron-shuttling compounds and/or Fe(III) chelators is invalid. This raised doubts about the mechanisms for Fe(III) oxide reduction by this organism. However, several experimental approaches indicated that G. metallireducens does not release electron-shuttling compounds and does not significantly solubilize Fe(III) during Fe(III) oxide reduction. These results suggest that G. metallireducens directly reduces insoluble Fe(III) oxide.

Alternate JournalAppl. Environ. Microbiol.
PubMed ID10788411