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Catalysis by heteropentalenes of electron transfer to oxygen from ferredoxin-NADP oxidoreductase reduced by NADPH |
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| Authors: | Patrick Camilleri John R. Bowyer Roger C. Weaver |
| Affiliation: | a Shell Research Ltd., Sittingbourne Research Centre, Sittingbourne, Kent ME9 8AG, U.K. b Plant Exploitation and Protection Group, Department of Biochemistry, Royal Holloway and Bedford Colleges, Egham Hill, Egham, Surrey, TW20 0EX, U.K. |
| Abstract: | A range of heteropentalene and bipyridinium compounds have been tested as catalysts of electron transfer to oxygen from spinach ferredoxin-NADP+ oxidoreductase reduced by NADPH. For a particular class of compound, the rate of oxygen reduction increased with increasing midpoint potential of the compound under conditions in which reduction of the compound was rate-limiting. Compounds with similar midpoint potentials from different structural classes showed marked differences in rate, attributed to specificity in the interaction with ferredoxin-NADP+ oxidoreductase. |
| Keywords: | Heteropentalene Bipyridinium compound Ferredoxin-NADP+ oxidoreductase Reduction potential Electron transfer |
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