title: Lack of production of electron-shuttling compounds or solubilization of Fe(III) during reduction of insoluble Fe(III) oxide by Geobacter metallireducens.
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.
authors.affiliation: Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003, USA.
authors.forename: K P
authors.initials: KP
authors.lastname: Nevin
authors.forename: D R
authors.initials: DR
authors.lastname: Lovley
mesh_terms: D020564:Deltaproteobacteria / Q000254:growth & development / Q000378:metabolism*; D004579:Electron Transport; D005290:Ferric Compounds / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D007700:Kinetics; D010084:Oxidation-Reduction; D012995:Solubility
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D007501:Iron