Progress Toward a Molecular Mechanism of Water Oxidation in Photosystem II

David J. Vinyard; Gary W Brudvig

doi:10.1146/annurev-physchem-052516-044820

Progress Toward a Molecular Mechanism of Water Oxidation in Photosystem II

David J. Vinyard, Gary W Brudvig

Yale University

Research output: Contribution to journal › Review article › peer-review

78 Citations (Scopus)

Abstract

The active site of photosynthetic water oxidation is the oxygen-evolving complex (OEC) in the photosystem II (PSII) reaction center. The OEC is a Mn4CaO5 cluster embedded in the PSII protein matrix, and it cycles through redox intermediates known as Si states (i 04). Significant progress has been made in understanding the inorganic and physical chemistry of states S0S3 through experiment and theory. The chemical steps from S3 to S0 are more poorly understood, however, because the identity of the substrate water molecules and the mechanism of OO bond formation are not well established. In this review, we highlight both the consensuses and the remaining challenges of PSII research.

Original language	English
Pages (from-to)	101-116
Number of pages	16
Journal	Annual Review of Physical Chemistry
Volume	68
DOIs	https://doi.org/10.1146/annurev-physchem-052516-044820
Publication status	Published - May 5 2017

Keywords

Oxygen evolution
Photosynthesis
Solar fuels

ASJC Scopus subject areas

Medicine(all)
Physical and Theoretical Chemistry

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10.1146/annurev-physchem-052516-044820

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N2 - The active site of photosynthetic water oxidation is the oxygen-evolving complex (OEC) in the photosystem II (PSII) reaction center. The OEC is a Mn4CaO5 cluster embedded in the PSII protein matrix, and it cycles through redox intermediates known as Si states (i 04). Significant progress has been made in understanding the inorganic and physical chemistry of states S0S3 through experiment and theory. The chemical steps from S3 to S0 are more poorly understood, however, because the identity of the substrate water molecules and the mechanism of OO bond formation are not well established. In this review, we highlight both the consensuses and the remaining challenges of PSII research.

AB - The active site of photosynthetic water oxidation is the oxygen-evolving complex (OEC) in the photosystem II (PSII) reaction center. The OEC is a Mn4CaO5 cluster embedded in the PSII protein matrix, and it cycles through redox intermediates known as Si states (i 04). Significant progress has been made in understanding the inorganic and physical chemistry of states S0S3 through experiment and theory. The chemical steps from S3 to S0 are more poorly understood, however, because the identity of the substrate water molecules and the mechanism of OO bond formation are not well established. In this review, we highlight both the consensuses and the remaining challenges of PSII research.

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KW - Photosynthesis

KW - Solar fuels

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Progress Toward a Molecular Mechanism of Water Oxidation in Photosystem II

Abstract

Keywords

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