Contribution of the exchange interactions to the redox properties of the [2Fe-2S] ferredoxins.
It is shown that in the [2Fe-2S] ferredoxins, the exchange interactions between the two iron atoms of the redox cluster provide stabilization of the oxidized state. Compared to the uncoupled situation, this leads to a significant lowering of the redox potential which can be larger than 100 mV. This effect could be one of the main origins of the low potential of these ferredoxins, compared to the potential of rubredoxins.
D001419:Bacteria / Q000378:metabolism; D005288:Ferredoxins / Q000378:metabolism*; D007501:Iron / Q000032:analysis; D007700:Kinetics; D010084:Oxidation-Reduction; D010944:Plants / Q000378:metabolism; D011485:Protein Binding; D013045:Species Specificity; D013455:Sulfur / Q000032:analysis
D005288:Ferredoxins; D013455:Sulfur; D007501:Iron