光系统II
氧化剂
光合作用
光合反应中心
化学
光化学
生物发生
光系统I
电化学
人工光合作用
化学能
化学物理
催化作用
光催化
物理化学
生物化学
电极
基因
有机化学
作者
David J. Vinyard,Gennady Ananyev,G. Charles Dismukes
标识
DOI:10.1146/annurev-biochem-070511-100425
摘要
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 O 2 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 Mn 4 CaO 5 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.
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