National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PR China.
National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
Biochim Biophys Acta Bioenerg. 2020 Apr 1;1861(4):148038. doi: 10.1016/j.bbabio.2019.06.010. Epub 2019 Jun 20.
Photosynthesis is a fundamental biological process involving the conversion of solar energy into chemical energy. The initial photochemical and photophysical events of photosynthesis are mediated by photosystem II (PSII) and photosystem I (PSI). Both PSII and PSI are multi-subunit supramolecular machineries composed of a core complex and a peripheral antenna system. The antenna system serves to capture light energy and transfer it to the core efficiently. Both PSII and PSI in the green lineage (plants and green algae) and PSI in red algae have an antenna system comprising a series of chlorophyll- and carotenoid-binding membrane proteins belonging to the light-harvesting complex (LHC) superfamily, including LHCII and LHCI. However, the antenna size and subunit composition vary considerably in the two photosystems from diverse organisms. On the basis of the plant and algal LHCII and LHCI structures that have been solved by X-ray crystallography and single-particle cryo-electron microscopy we review the detailed structural features and characteristic pigment properties of these LHCs in PSII and PSI. This article is part of a Special Issue entitled Light harvesting, edited by Dr. Roberta Croce.
光合作用是一种将太阳能转化为化学能的基本生物过程。光合作用的初始光化学和光物理事件是由光系统 II（PSII）和光系统 I（PSI）介导的。PSII 和 PSI 都是由核心复合物和外围天线系统组成的多亚基超分子机器。天线系统用于有效地捕获光能并将其传递到核心。绿色谱系（植物和绿藻）中的 PSII 和 PSI 以及红藻中的 PSI 都具有由一系列叶绿素和类胡萝卜素结合的膜蛋白组成的天线系统，这些蛋白属于光捕获复合物（LHC）超家族，包括 LHCII 和 LHCI。然而，来自不同生物体的两个光系统的天线大小和亚基组成差异很大。基于 X 射线晶体学和单颗粒冷冻电子显微镜解析的植物和藻类 LHCII 和 LHCI 结构，我们综述了 PSII 和 PSI 中这些 LHC 的详细结构特征和特征色素性质。本文是题为“光捕获”的特刊的一部分，由 Roberta Croce 博士编辑。
