Electrically conductive bacterial nanowires produced by Shewanella oneidensis strain MR-1 and other microorganisms

Yuri A. Gorby, Svetlana Yanina, Jeffrey S. McLean, Kevin M. Rosso, Dianne Moyles, Alice Dohnalkova, Terry J. Beveridge, In Seop Chang, Byung Hong Kim, Kyung Shik Kim, David E. Culley, Samantha B. Reed, Margaret F. Romine, Daad A. Saffarini, Eric A. Hill, Liang Shi, Dwayne A. Elias, David W. Kennedy, Grigoriy Pinchuk, Kazuya WatanabeShun'ichi Ishii, Bruce Logan, Kenneth H. Nealson, Jim K. Fredrickson

Research output: Contribution to journalArticlepeer-review

1239 Scopus citations

Abstract

Shewanella oneidensis MR-1 produced electrically conductive pilus-like appendages called bacterial nanowires in direct response to electron-acceptor limitation. Mutants deficient in genes for c-type decaheme cytochromes MtrC and OmcA, and those that lacked a functional Type II secretion pathway displayed nanowires that were poorly conductive. These mutants were also deficient in their ability to reduce hydrous ferric oxide and in their ability to generate current in a microbial fuel cell. Nanowires produced by the oxygenic phototrophic cyanobacterium Synechocystis PCC6803 and the thermophilic, fermentative bacterium Pelotomaculum thermopropionicum reveal that electrically conductive appendages are not exclusive to dissimilatory metal-reducing bacteria and may, in fact, represent a common bacterial strategy for efficient electron transfer and energy distribution.

Original languageEnglish (US)
Pages (from-to)11358-11363
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume103
Issue number30
DOIs
StatePublished - Jul 25 2006

All Science Journal Classification (ASJC) codes

  • General

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