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• W4377224988 abstract "Abstract Flavodiiron proteins (FDPs) catalyse light-dependent reduction of oxygen to water in photosynthetic organisms such as cyanobacteria, creating a protective electron sink that alleviates electron pressure on the photosynthetic apparatus. However, the electron donor to FDPs and the molecular mechanism regulating FDP activity have remained elusive. To address these questions, we employed spectroscopic and gas flux analysis of photosynthetic electron transport, bimolecular fluorescence complementation assays for in vivo protein-protein interactions in the model cyanobacterium Synechocystis sp. PCC 6803, as well as in silico surface charge modelling. We confirmed Ferredoxin-1 as the main electron donor to FDP heterooligomers and revealed that association of FDP heterooligomers with thylakoid membranes is promoted by dissipation of trans-thylakoid proton motive force. We propose a self-feedback mechanism to dynamically control FDP activity. Our findings elucidate the regulatory mechanisms of photosynthesis and have implications for rationally directing electron flux toward desired reactions in photosynthesis-based biotechnological applications." @default.
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• W4377224988 date "2023-05-22" @default.
• W4377224988 modified "2023-09-26" @default.
• W4377224988 title "Proton motive force dissipation drives flavodiiron proteins to the thylakoid membrane for ferredoxin-powered O₂photoreduction" @default.
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• W4377224988 doi "https://doi.org/10.1101/2023.05.19.541409" @default.
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