Songhao Zhao, Lili Shen, Xiaoyi Li, Qiushuang Tao, Zhenhua Li, Caizhe Xu, Cuicui Zhou, Yanyan Yang, Min Sang, Guangye Han, Long-Jiang Yu, Tingyun Kuang, Jian-Ren Shen, Wenda Wang
Diatoms are dominant marine algae and contribute around a quarter of global primary productivity, the success of which is largely attributed to their photosynthetic capacity aided by specific fucoxanthin chlorophyll-binding proteins (FCPs) to enhance the blue-green light absorption under water. We purified a photosystem II (PSII)-FCPII supercomplex and a trimeric FCP from Cyclotella meneghiniana (Cm) and solved their structures by cryo-electron microscopy (cryo-EM). The structures reveal detailed organizations of monomeric, dimeric and trimeric FCP antennae, as well as distinct assemblies of Lhcx6_1 and dimeric FCPII-H in PSII core...
December 9, 2023: Nature Communications