TY - JOUR
T1 - Photosystem II
T2 - The reaction center of oxygenic photosynthesis
AU - Vinyard, David J.
AU - Ananyev, Gennady M.
AU - Charles Dismukes, G.
PY - 2013/6/1
Y1 - 2013/6/1
N2 - Photosystem II (PSII) uses light energy to split water into chemical products that power the planet. The stripped protons contribute to a membrane electrochemical potential before combining with the stripped electrons to make chemical bonds and releasing O2 for powering respiratory metabolisms. In this review, we provide an overview of the kinetics and thermodynamics of water oxidation that highlights the conserved performance of PSIIs across species. We discuss recent advances in our understanding of the site of water oxidation based upon the improved (1.9-Å resolution) atomic structure of the Mn4CaO5 water-oxidizing complex (WOC) within cyanobacterial PSII. We combine these insights with recent knowledge gained from studies of the biogenesis and assembly of the WOC (called photoassembly) to arrive at a proposed chemical mechanism for water oxidation.
AB - Photosystem II (PSII) uses light energy to split water into chemical products that power the planet. The stripped protons contribute to a membrane electrochemical potential before combining with the stripped electrons to make chemical bonds and releasing O2 for powering respiratory metabolisms. In this review, we provide an overview of the kinetics and thermodynamics of water oxidation that highlights the conserved performance of PSIIs across species. We discuss recent advances in our understanding of the site of water oxidation based upon the improved (1.9-Å resolution) atomic structure of the Mn4CaO5 water-oxidizing complex (WOC) within cyanobacterial PSII. We combine these insights with recent knowledge gained from studies of the biogenesis and assembly of the WOC (called photoassembly) to arrive at a proposed chemical mechanism for water oxidation.
KW - Oxygen evolution
KW - Period-four oscillations
KW - Photoassembly
KW - Photoprotection
KW - Proton-coupled electron transport
KW - Water oxidation kinetics
KW - Water oxidation thermodynamics
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U2 - 10.1146/annurev-biochem-070511-100425
DO - 10.1146/annurev-biochem-070511-100425
M3 - Review article
C2 - 23527694
AN - SCOPUS:84878349958
VL - 82
SP - 577
EP - 606
JO - Annual Review of Biochemistry
JF - Annual Review of Biochemistry
SN - 0066-4154
ER -