Acetate Oxidation Coupled to Fe(III) Reduction in Hyperthermophilic Microorganisms

AUTOR(ES)

Tor, Jason M.

FONTE

American Society for Microbiology

RESUMO

No hyperthermophilic microorganisms have previously been shown to anaerobically oxidize acetate, the key extracellular intermediate in the anaerobic oxidation of organic matter. Here we report that two hyperthermophiles, Ferroglobus placidus and “Geoglobus ahangari,” grow at 85°C by oxidizing acetate to carbon dioxide, with Fe(III) serving as the electron acceptor. These results demonstrate that acetate could potentially be metabolized within the hot microbial ecosystems in which hyperthermophiles predominate, rather than diffusing to cooler environments prior to degradation as has been previously proposed.

Documentos Relacionados

• Acetate oxidation by dissimilatory Fe(III) reducers.
• Microbial Reduction of Fe(III) in Acidic Sediments: Isolation of Acidiphilium cryptum JF-5 Capable of Coupling the Reduction of Fe(III) to the Oxidation of Glucose
• Mechanisms for Accessing Insoluble Fe(III) Oxide during Dissimilatory Fe(III) Reduction by Geothrix fermentans
• Dissimilatory Fe(III) and Mn(IV) reduction.
• Regulation of Dissimilatory Fe(III) Reduction Activity in Shewanella putrefaciens