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Issue 18, 2010
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Molecular details of multielectron transfer: the case of multiheme cytochromes from metal respiring organisms

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Abstract

Shewanella are facultative anaerobic bacteria of remarkable respiratory versatility that includes the dissimilatory reduction of metal ores. They contain a large number of multiheme c-type cytochromes that play a significant role in various anaerobic respiratory processes. Of all the cytochromes found in Shewanella, only the two most abundant periplasmic cytochromes, the small tetraheme cytochrome (STC) and flavocytochrome c3 (Fcc3) have been structurally characterized. For these two proteins the molecular bases for their redox properties were determined using spectroscopic methods based on paramagnetic NMR, that allow the contribution of specific hemes to be discriminated. In this perspective these results are reviewed in the context of the continuing effort to understand the molecular mechanisms of electron transfer in the respiratory chains of these organisms.

Graphical abstract: Molecular details of multielectron transfer: the case of multiheme cytochromes from metal respiring organisms

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Article information


Submitted
01 Sep 2009
Accepted
10 Nov 2009
First published
21 Dec 2009

Dalton Trans., 2010,39, 4259-4266
Article type
Perspective

Molecular details of multielectron transfer: the case of multiheme cytochromes from metal respiring organisms

C. M. Paquete and R. O. Louro, Dalton Trans., 2010, 39, 4259
DOI: 10.1039/B917952F

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