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A five-coordinate Mn(IV) intermediate in biological water oxidation: spectroscopic signature and a pivot mechanism for water binding

Retegan, Marius; Krewald, Vera; Mamedov, Fikret; Neese, Frank; Lubitz, Wolfgang; Cox, Nicholas; Pantazis, Dimitrios A.


Among the four photo-driven transitions of the water-oxidizing tetramanganese–calcium cofactor of biological photosynthesis, the second-last step of the catalytic cycle, that is the S2 to S3 state transition, is the crucial step that poises the catalyst for the final O–O bond formation. This transition, whose intermediates are not yet fully understood, is a multi-step process that involves the redox-active tyrosine residue and includes oxidation and deprotonation of the catalytic cluster, as...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: Chemical Science
DOI: 10.1039/c5sc03124a
Access Rights: Open Access


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