Applied and Environmental Microbiology · 2008 · 20 citations · 0 references
Life SciencesBiologyMicrobiologyMicrobial EcologyMicrobial MetabolismRedox BiochemistryAnaerobic RespirationElectrochemical CellsElectron Transport ChainFuel CellsMicrobial RespirationRedox ProcessesCytochrome SystemsElectron DonorsElectron TransferGram-negative AnaerobesManganese ReductionsMicrobial Electron TransferMicrobial Fuel CellsMicrobial Redox Processes
Shewanella oneidensis MR-1 is a gram-negative facultative anaerobe capable of utilizing a broad range of electron acceptors, including several solid substrates. S. oneidensis MR-1 can reduce Mn(IV) and Fe(III) oxides and can produce current in microbial fuel cells. The mechanisms that are employed by S. oneidensis MR-1 to execute these processes have not yet been fully elucidated. Several different S. oneidensis MR-1 deletion mutants were generated and tested for current production and metal oxide reduction. The results showed that a few key cytochromes play a role in all of the processes but that their degrees of participation in each process are very different. Overall, these data suggest a very complex picture of electron transfer to solid and soluble substrates by S. oneidensis MR-1.