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The pigment-protein network of a diatom photosystem II–light-harvesting antenna supercomplex

作 者:Pi X1, Zhao SH1, Wang WD1, Liu DS, Xu CZ, Han GY, Kuang TY*, Sui SF*, Shen JR*
影响因子: 41.037
刊物名称: Science
出版年份: 2019
卷:   期:    页码: DOI: 10.1126/science.aax4406

文章摘要 : 

Diatoms play important roles in global primary productivity and biogeochemical cycling of carbon, in part owing to the ability of their photosynthetic apparatus to adapt to rapidly changing light intensity. We report a cryo–electron microscopy structure of the photosystem II (PSII)–fucoxanthin (Fx) chlorophyll (Chl) a/c binding protein (FCPII) supercomplex from the centric diatom Chaetoceros gracilis. The supercomplex comprises two protomers, each with two tetrameric and three monomeric FCPIIs around a PSII core that contains five extrinsic oxygen-evolving proteins at the lumenal surface. The structure reveals the arrangement of a huge pigment network that contributes to efficient light energy harvesting, transfer, and dissipation processes in the diatoms.


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