Department of Theoretical Biophysics, Institute for Theoretical Physics, Johannes Kepler University Linz, Linz, Austria.
Humboldt-Universität zu Berlin, Institute for Biology, Biophysics of Photosynthesis, Berlin, Germany.
Protein Sci. 2020 May;29(5):1090-1119. doi: 10.1002/pro.3841. Epub 2020 Feb 24.
Photosystem II (PSII) is a membrane-spanning, multi-subunit pigment-protein complex responsible for the oxidation of water and the reduction of plastoquinone in oxygenic photosynthesis. In the present review, the recent explosive increase in available structural information about the PSII core complex based on X-ray crystallography and cryo-electron microscopy is described at a level of detail that is suitable for a future structure-based analysis of light-harvesting processes. This description includes a proposal for a consistent numbering scheme of protein-bound pigment cofactors across species. The structural survey is complemented by an overview of the state of affairs in structure-based modeling of excitation energy transfer in the PSII core complex with emphasis on electrostatic computations, optical properties of the reaction center, the assignment of long-wavelength chlorophylls, and energy trapping mechanisms.
光系统 II（PSII）是一种跨膜的、多亚基的色素蛋白复合物，负责氧化水和还原质体醌在放氧光合作用。在本综述中，详细描述了基于 X 射线晶体学和低温电子显微镜的 PSII 核心复合物的结构信息的最新爆炸式增长，适合对光捕获过程进行基于结构的未来分析。该描述包括跨物种的蛋白结合色素辅因子的一致编号方案的建议。结构调查由 PSII 核心复合物中激发能量转移的基于结构建模的概述补充，重点是静电计算、反应中心的光学性质、长波长叶绿素的分配和能量捕获机制。
