Are gram-positive bacteria capable of electron transfer across their cell wall without an externally available electron shuttle?

Geobiology. 2008 Jun;6(3):220-4. doi: 10.1111/j.1472-4669.2007.00135.x.


The extensive contributions by Terry Beveridge to our understanding of the differences in cell wall organization with respect to structure, chemistry and compartmentalization between gram-positive and gram-negative bacteria are summarized. These contributions greatly aided in conceptualization of recent discoveries concerning electron export and import across cell walls of some gram-negative bacteria. Although electron export and import across the cell wall by any gram-positive has not been documented so far, Beveridge's observations and concepts concerning cell walls of gram-positive bacteria suggest potential mechanisms by which such electron transfer may occur.

Publication types

  • Review

MeSH terms

  • Cell Wall / metabolism*
  • Cell Wall / ultrastructure
  • Electron Transport
  • Ferric Compounds / metabolism
  • Gram-Positive Bacteria / metabolism*
  • Models, Biological*
  • Peptidoglycan / metabolism


  • Ferric Compounds
  • Peptidoglycan
  • ferric oxide