Ammonia binding to the oxygen-evolving complex of photosystem II identifies the solvent-exchangeable oxygen bridge (μ-oxo) of the manganese tetramer
Perez-Navarro, Montserrat; Ames, William M.; Nisson, Hakan; Lohmiller, Thomas; Pantazis, Dimitrios A.; Rapatskiy, Leonid; Nowaczyk, Marc M.; Neese, Frank; Boussac, Alain; Messinger, Johannes; Lubitz, Wolfgang; Cox, Nicholas
The assignment of the two substrate water sites of the tetra-manganese penta-oxygen calcium (Mn4O5Ca) cluster of photosystem II is essential for the elucidation of the mechanism of biological O-O bond formation and the subsequent design of bio-inspired water-splitting catalysts. We recently demonstrated using pulsed EPR spectroscopy that one of the five oxygen bridges (μ-oxo) exchanges unusually rapidly with bulk water and is thus a likely candidate for one of the substrates. Ammonia, a water...[Show more]
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|Source:||PNAS - Proceedings of the National Academy of Sciences of the United States of America|
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