ArticleNature chemistry2014
A bioinspired redox relay that mimics radical interactions of the Tyr-His pairs of photosystem II.
Article in Nature chemistry, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.
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32 citing papers in PubMed, 149 citations in OpenAlex.
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- Proton-controlled Action of an Imidazole as Electron Relay in a Photoredox Triad.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2022Article
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- Nonequilibrium Dynamics of Proton-Coupled Electron Transfer in Proton Wires: Concerted but Asynchronous Mechanisms.ACS central science · 2020Article
- HYSCORE and DFT Studies of Proton-Coupled Electron Transfer in a Bioinspired Artificial Photosynthetic Reaction Center.iScience · 2020Article
- A stable dye-sensitized photoelectrosynthesis cell mediated by a NiO overlayer for water oxidation.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Linear correlation models for the redox potential of organic molecules in aqueous solutions.Journal of molecular modeling · 2020Article
- Secondary structure effects on internal proton transfer in poly-peptides.Structural dynamics (Melville, N.Y.) · 2020Article
- Substituent Effects on Photochemistry of Anthracene-Phenol-Pyridine Triads Revealed by Multireference Calculations.Journal of the American Chemical Society · 2020Article
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13 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
In water-oxidizing photosynthetic organisms, light absorption generates a powerfully oxidizing chlorophyll complex (P680(•+)) in the photosystem II reaction centre. This is reduced via an electron transfer pathway from the manganese-containing water-oxidizing catalyst, which includes an electron transfer relay comprising a tyrosine (Tyr)-histidine (His) pair that features a hydrogen bond between a phenol group and an imidazole group. By rapidly reducing P680(•+), the relay is thought to mitigate recombination reactions, thereby ensuring a high quantum yield of water oxidation. Here, we show that an artificial reaction centre that features a benzimidazole-phenol model of the Tyr-His pair mimics both the short-internal hydrogen bond in photosystem II and, using electron paramagnetic resonance spectroscopy, the thermal relaxation that accompanies proton-coupled electron transfer. Although this artificial system is much less complex than the natural one, theory suggests that it captures the essential features that are important in the function of the relay.
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