Department of Biophysical Chemistry, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
J Photochem Photobiol B. 2011 Jul-Aug;104(1-2):142-53. doi: 10.1016/j.jphotobiol.2011.02.015. Epub 2011 Feb 23.
Photosystem II (PSII) is responsible for the water oxidation in photosynthesis and it consists of many proteins and pigment-protein complexes in a variable composition, depending on environmental conditions. Sunlight-induced charge separation lies at the basis of the photochemical reactions and it occurs in the reaction center (RC). The RC is located in the PSII core which also contains light-harvesting complexes CP43 and CP47. The PSII core of plants is surrounded by external light-harvesting complexes (lhcs) forming supercomplexes, which together with additional external lhcs, are located in the thylakoid membrane where they perform their functions. In this paper we provide an overview of the available information on the structure and organization of pigment-protein complexes in PSII and relate this to experimental and theoretical results on excitation energy transfer (EET) and charge separation (CS). This is done for different subcomplexes, supercomplexes, PSII membranes and thylakoid membranes. Differences in experimental and theoretical results are discussed and the question is addressed how results and models for individual complexes relate to the results on larger systems. It is shown that it is still very difficult to combine all available results into one comprehensive picture.
光系统 II（PSII）负责光合作用中的水氧化，它由许多蛋白质和色素-蛋白复合物组成，其组成在不同的环境条件下会发生变化。光诱导的电荷分离是光化学反应的基础，它发生在反应中心（RC）中。RC 位于 PSII 核心中，该核心还包含光捕获复合物 CP43 和 CP47。植物的 PSII 核心被外部光捕获复合物（lhcs）包围，形成超复合物，这些超复合物与其他外部 lhcs 一起位于类囊体膜中，在那里执行其功能。在本文中，我们概述了关于 PSII 中色素-蛋白复合物的结构和组织的现有信息，并将其与关于激发能量转移（EET）和电荷分离（CS）的实验和理论结果联系起来。这是针对不同的亚复合物、超复合物、PSII 膜和类囊体膜进行的。讨论了实验和理论结果之间的差异，并提出了如何将单个复合物的结果和模型与更大系统的结果联系起来的问题。结果表明，将所有可用结果结合成一个综合画面仍然非常困难。
