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Structural features of the diatom photosystem II-light-harvesting antenna complex
Wang, Wenda; Zhao, Songhao1; Pi, Xiong; Kuang, Tingyun; Sui, Sen-Fang; Shen, Jian-Ren
Source PublicationFEBS JOURNAL
AbstractIn photosynthesis, light energy is captured by pigments bound to light-harvesting antenna proteins (LHC) that then transfer the energy to the photosystem (PS) cores to initiate photochemical reactions. The LHC proteins surround the PS cores to form PS-LHC supercomplexes. In order to adapt to a wide range of light environments, photosynthetic organisms have developed a large variety of pigments and antenna proteins to utilize the light energy efficiently under different environments. Diatoms are a group of important eukaryotic algae and possess fucoxanthin (Fx) chlorophyll a/c proteins (FCP) as antenna which have exceptional capabilities of harvesting blue-green light under water and dissipate excess energy under strong light conditions. We have solved the structure of a PSII-FCPII supercomplex from a centric diatom Chaetoceros gracilis by cryo-electron microscopy, and also the structure of an isolated FCP dimer from a pennate diatom Phaeodactylum tricornutum by X-ray crystallography at a high resolution. These results revealed the oligomerization states of FCPs distinctly different from those of LHCII found in the green lineage organisms, the detailed binding patterns of Chl c and Fxs, a huge pigment network, and extensive protein-protein, pigment-protein, and pigment-pigment interactions within the PSII-FCPII supercomplex. These results therefore provide a solid structural basis for examining the detailed mechanisms of the highly efficient energy transfer and quenching processes in diatoms.
Keyworddiatom energy transfer fucoxanthin light harvesting photosystem
Subject AreaBiochemistry & Molecular Biology
Indexed BySCI
WOS Research AreaBiochemistry & Molecular Biology
WOS IDWOS:000505929000001
Publication PlaceHOBOKEN
Funding OrganizationNational Key R&D Program of China [2017YFA0503700, 2019YFA0906300] ; CAS Key Research Program for Frontier Science [QYZDY-SSW-SMC003] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31600191]
Corresponding Author Emailjrshen@ibcas.ac.cn
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Key Lab Photobiol, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Tsinghua Univ, Beijing Adv Innovat Ctr Struct Biol, Sch Life Sci, State Key Lab Membrane Biol, Beijing, Peoples R China
4.Okayama Univ, Res Inst Interdisciplinary Sci, Okayama, Japan
5.Okayama Univ, Grad Sch Nat Sci & Technol, Okayama, Japan
Recommended Citation
GB/T 7714
Wang, Wenda,Zhao, Songhao,Pi, Xiong,et al. Structural features of the diatom photosystem II-light-harvesting antenna complex[J]. FEBS JOURNAL,2020,287(11):2191-2200.
APA Wang, Wenda,Zhao, Songhao,Pi, Xiong,Kuang, Tingyun,Sui, Sen-Fang,&Shen, Jian-Ren.(2020).Structural features of the diatom photosystem II-light-harvesting antenna complex.FEBS JOURNAL,287(11),2191-2200.
MLA Wang, Wenda,et al."Structural features of the diatom photosystem II-light-harvesting antenna complex".FEBS JOURNAL 287.11(2020):2191-2200.
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