Cellular and Molecular Life Sciences CMLS

, Volume 58, Issue 11, pp 1562–1571 | Cite as

Extracellular electron transfer

  • M.E. Hernandez
  • D.K. Newman


Results from several laboratories indicate that extracellular electron transfer may be a general mechanism whereby microoorganisms generate energy for cell growth and/or maintenance. Specifically, bacteria can use redox-active organic small molecules, generated outside or inside the cells, to shuttle electrons between reduced and oxidized compounds. Electron shuttling has now been reported for several different bacterial species, and exchanges of shuttling compounds may even syntrophically link diverse organisms in nature. Biofilm systems in both geological and clinical settings are likely to be important environments for metabolisms that employ extracellular electron transfer. Both structural and functional analyses suggest that electron shuttles and some virulence factors may be related to one another.

Key words. Iron respiration; biofilm; extracellular electron transfer; electron shuttle. 


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Copyright information

© Birkhäuser Verlag, 2001

Authors and Affiliations

  • M.E. Hernandez
    • 1
  • D.K. Newman
    • 2
  1. 1.Department of Environmental Engineering Science, Caltech, Pasadena, California 91125 (USA)US
  2. 2.Department of Geological and Planetary Sciences, Caltech, Pasadena, California 91125 (USA), Fax +1 626 683 0621, e-mail: dkn@gps.caltech.eduUS

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