Evidence for iron-dependent nitrate respiration in the dissimilatory iron-reducing bacterium Geobacter metallireducens.
The dissimilatory iron-reducing bacterium Geobacter metallireducens was found to require iron at a concentration in excess of 50 microM for continuous cultivation on nitrate. Growth yield (approximately 3-fold), cytochrome c content (approximately 7-fold), and nitrate (approximately 4.5-fold) and nitrite (approximately 70-fold) reductase activities were all increased significantly when the growth medium was amended with 500 microM iron.
Senko
J M
JM
Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania 15219, USA.
Stolz
J F
JF
D003470:Culture Media; D003574:Cytochrome c Group / Q000378:metabolism; D020564:Deltaproteobacteria / Q000254:growth & development / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial; D007501:Iron / Q000378:metabolism*; D050901:Nitrate Reductase; D009565:Nitrate Reductases / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism*; D009572:Nitrite Reductases / Q000378:metabolism; D010084:Oxidation-Reduction
D003470:Culture Media; D003574:Cytochrome c Group; D009566:Nitrates; D007501:Iron; D009565:Nitrate Reductases; D009572:Nitrite Reductases; D050901:Nitrate Reductase