Current production and metal oxide reduction by Shewanella oneidensis MR-1 wild type and mutants.
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.
Bretschger
Orianna
O
Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA.
Obraztsova
Anna
A
Sturm
Carter A
CA
Chang
In Seop
IS
Gorby
Yuri A
YA
Reed
Samantha B
SB
Culley
David E
DE
Reardon
Catherine L
CL
Barua
Soumitra
S
Romine
Margaret F
MF
Zhou
Jizhong
J
Beliaev
Alexander S
AS
Bouhenni
Rachida
R
Saffarini
Daad
D
Mansfeld
Florian
F
Kim
Byung-Hong
BH
Fredrickson
James K
JK
Nealson
Kenneth H
KH
D004579:Electron Transport; D005290:Ferric Compounds / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D017895:Manganese Compounds / Q000378:metabolism*; D009154:Mutation; D010084:Oxidation-Reduction; D010087:Oxides / Q000378:metabolism*; D020592:Shewanella / Q000201:enzymology / Q000235:genetics* / Q000378:metabolism*
D005290:Ferric Compounds; D017895:Manganese Compounds; D010087:Oxides