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- W2065913265 abstract "As discussed throughout this special issue, oxidation and reduction reactions play critical roles in the function of many organisms. In photosynthetic organisms, the conversion of light energy drives oxidation and reduction reactions through the transfer of electrons and protons in order to create energy-rich compounds. These reactions occur in proteins such as cytochrome c, a heme-containing water-soluble protein, the bacteriochlorophyll-containing reaction center, and photosystem II where water is oxidized at the manganese cluster. A critical measure describing the ability of cofactors in proteins to participate in such reactions is the oxidation/reduction midpoint potential. In this review, the basic concepts of oxidation/reduction reactions are reviewed with a summary of the experimental approaches used to measure the midpoint potential of metal cofactors. For cofactors in proteins, the midpoint potential not only depends upon the specific chemical characteristics of cofactors but also upon interactions with the surrounding protein, such as the nature of the coordinating ligands and protein environment. These interactions can be tailored to optimize an oxidation/reduction reaction carried out by the protein. As examples, the midpoint potentials of hemes in cytochromes, bacteriochlorophylls in reaction centers, and the manganese cluster of photosystem II are discussed with an emphasis on the influence that protein interactions have on these potentials. This article is part of a Special Issue entitled: Metals in Bioenergetics and Biomimetics Systems." @default.
- W2065913265 created "2016-06-24" @default.
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- W2065913265 date "2013-08-01" @default.
- W2065913265 modified "2023-10-18" @default.
- W2065913265 title "Influence of protein interactions on oxidation/reduction midpoint potentials of cofactors in natural and de novo metalloproteins" @default.
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- W2065913265 doi "https://doi.org/10.1016/j.bbabio.2013.02.014" @default.
- W2065913265 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23466333" @default.
- W2065913265 hasPublicationYear "2013" @default.
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