The ‘porin-cytochrome’ model for microbe-to-mineral electron transfer

Richardson, David J., Butt, Julea N., Fredrickson, Jim K., Zachara, John M., Shi, Liang, Edwards, Marcus J., White, Gaye, Baiden, Nanakow, Gates, Andrew J., Marritt, Sophie J. and Clarke, Thomas A. (2012) The ‘porin-cytochrome’ model for microbe-to-mineral electron transfer. Molecular Microbiology, 85 (2). pp. 201-212. ISSN 1365-2958

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Abstract

Many species of bacteria can couple anaerobic growth to the respiratory reduction of insoluble minerals containing Fe(III) or Mn(III/IV). It has been suggested that in Shewanella species electrons cross the outer membrane to extracellular substrates via ‘porin–cytochrome’ electron transport modules. The molecular structure of an outer-membrane extracellular-facing deca-haem terminus for such a module has recently been resolved. It is debated how, once outside the cells, electrons are transferred from outer-membrane cytochromes to insoluble electron sinks. This may occur directly or by assemblies of cytochromes, perhaps functioning as ‘nanowires’, or via electron shuttles. Here we review recent work in this field and explore whether it allows for unification of the electron transport mechanisms supporting extracellular mineral respiration in Shewanella that may extend into other genera of Gram-negative bacteria.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Biological Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Organisms and the Environment Faculty of Science > Research Groups > Molecular Microbiology Faculty of Science > Research Centres > Centre for Molecular and Structural Biochemistry Faculty of Science > Research Groups > Energy Materials Laboratory Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Chemistry of Life Processes Faculty of Science > Research Groups > Biophysical Chemistry (former - to 2017) Faculty of Science > Research Groups > Wolfson Centre for Advanced Environmental Microbiology
Depositing User:	Users 2731 not found.
Date Deposited:	17 Aug 2012 11:26
Last Modified:	19 May 2025 08:32
URI:	https://ueaeprints.uea.ac.uk/id/eprint/39397
DOI:	10.1111/j.1365-2958.2012.08088.x

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