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Current production and metal oxide reduction by Shewanella oneidensis MR-1 wild type and mutants |
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| Authors: | Bretschger Orianna Obraztsova Anna Sturm Carter A Chang In Seop Gorby Yuri A Reed Samantha B Culley David E Reardon Catherine L Barua Soumitra Romine Margaret F Zhou Jizhong Beliaev Alexander S Bouhenni Rachida Saffarini Daad Mansfeld Florian Kim Byung-Hong Fredrickson James K Nealson Kenneth H |
| Institution: | Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA. |
| Abstract: | 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. |
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