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. 1991 Jul;57(7):2063–2068. doi: 10.1128/aem.57.7.2063-2068.1991

Energy Transduction by Anaerobic Ferric Iron Respiration in Thiobacillus ferrooxidans

J T Pronk 1,*, K Liem 1, P Bos 1, J G Kuenen 1
PMCID: PMC183522  PMID: 16348526

Abstract

Formate-grown cells of the obligately chemolithoautotrophic acidophile Thiobacillus ferrooxidans were capable of formate- and elemental sulfur-dependent reduction of ferric iron under anaerobic conditions. Under aerobic conditions, both oxygen and ferric iron could be simultaneously used as electron acceptors. To investigate whether anaerobic ferric iron respiration by T. ferrooxidans is an energy-transducing process, uptake of amino acids was studied. Glycine uptake by starved cells did not occur in the absence of an electron donor, neither under aerobic conditions nor under anaerobic conditions. Uptake of glycine could be driven by formate- and ferrous iron-dependent oxygen uptake. Under anaerobic conditions, ferric iron respiration with the electron donors formate and elemental sulfur could energize glycine uptake. Glycine uptake was inhibited by the uncoupler 2,4-dinitrophenol. The results indicate that anaerobic ferric iron respiration can contribute to the energy budget of T. ferrooxidans.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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