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- W2896757761 abstract "The BLUF (blue light sensor using flavin adenine dinucleotide) domain is widely studied as a prototype for proton coupled electron transfer (PCET) reactions in biological systems. In this work, the photo‐induced concerted PCET reaction from the light state of the AppA BLUF domain is investigated. To model the simultaneous transfer of two protons in the reaction, two‐dimensional potential energy surfaces for the double proton transfer are first calculated for the locally excited and charge transfer states, which are then used to obtain the vibrational wave function overlaps and the vibrational energy levels. Contributions to the PCET rate constant from each pair of vibronic states are then analyzed using the theory based on the Fermi's golden rule. We show that, the recently proposed light state structure of the BLUF domain with a tautomerized Gln63 residue is consistent with the concerted transfer of one electron and two protons. It is also found that, thermal fluctuations of the protein structure, especially the proton donor‐acceptor distances, play an important role in determining the PCET reaction rate. © 2018 Wiley Periodicals, Inc." @default.
- W2896757761 created "2018-10-26" @default.
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- W2896757761 date "2018-10-20" @default.
- W2896757761 modified "2023-10-16" @default.
- W2896757761 title "Theoretical study of proton coupled electron transfer reaction in the light state of the AppA BLUF photoreceptor" @default.
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- W2896757761 doi "https://doi.org/10.1002/jcc.25561" @default.
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- W2896757761 hasPublicationYear "2018" @default.
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