光系统II与水的光合氧化：概述
Photosystem II and photosynthetic oxidation of water: an overview.
作者信息
Goussias Charilaos, Boussac Alain, Rutherford A William
机构信息
Service de Bioénergétique, URA CNRS 2096, Bat 532, CEA Saclay, 91191 Gif-sur-Yvette, France.
出版信息
Philos Trans R Soc Lond B Biol Sci. 2002 Oct 29;357(1426):1369-81; discussion 1419-20. doi: 10.1098/rstb.2002.1134.
Abstract
Conceptually, photosystem II, the oxygen-evolving enzyme, can be divided into two parts: the photochemical part and the catalytic part. The photochemical part contains the ultra-fast and ultra-efficient light-induced charge separation and stabilization steps that occur when light is absorbed by chlorophyll. The catalytic part, where water is oxidized, involves a cluster of Mn ions close to a redox-active tyrosine residue. Our current understanding of the catalytic mechanism is mainly based on spectroscopic studies. Here, we present an overview of the current state of knowledge of photosystem II, attempting to delineate the open questions and the directions of current research.
摘要
从概念上讲，光系统II（即放氧酶）可分为两个部分：光化学部分和催化部分。光化学部分包含叶绿素吸收光时发生的超快且高效的光诱导电荷分离与稳定步骤。催化部分是水被氧化的地方，涉及靠近一个氧化还原活性酪氨酸残基的锰离子簇。我们目前对催化机制的理解主要基于光谱研究。在此，我们概述了光系统II的当前知识状态，试图勾勒出尚未解决的问题以及当前的研究方向。
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