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Structure of cryptophyte photosystem II-light-harvesting antennae supercomplex.
Zhang, Yu-Zhong; Li, Kang; Qin, Bing-Yue; Guo, Jian-Ping; Zhang, Quan-Bao; Zhao, Dian-Li; Chen, Xiu-Lan; Gao, Jun; Liu, Lu-Ning; Zhao, Long-Sheng.
Afiliación
  • Zhang YZ; Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China. zhangyz@sdu.edu.cn.
  • Li K; MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao, China. zhangyz@sdu.edu.cn.
  • Qin BY; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, China. zhangyz@sdu.edu.cn.
  • Guo JP; MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao, China.
  • Zhang QB; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, China.
  • Zhao DL; Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
  • Chen XL; Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, China.
  • Gao J; Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
  • Liu LN; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, China.
  • Zhao LS; Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
Nat Commun ; 15(1): 4999, 2024 Jun 12.
Article en En | MEDLINE | ID: mdl-38866834
ABSTRACT
Cryptophytes are ancestral photosynthetic organisms evolved from red algae through secondary endosymbiosis. They have developed alloxanthin-chlorophyll a/c2-binding proteins (ACPs) as light-harvesting complexes (LHCs). The distinctive properties of cryptophytes contribute to efficient oxygenic photosynthesis and underscore the evolutionary relationships of red-lineage plastids. Here we present the cryo-electron microscopy structure of the Photosystem II (PSII)-ACPII supercomplex from the cryptophyte Chroomonas placoidea. The structure includes a PSII dimer and twelve ACPII monomers forming four linear trimers. These trimers structurally resemble red algae LHCs and cryptophyte ACPI trimers that associate with Photosystem I (PSI), suggesting their close evolutionary links. We also determine a Chl a-binding subunit, Psb-γ, essential for stabilizing PSII-ACPII association. Furthermore, computational calculation provides insights into the excitation energy transfer pathways. Our study lays a solid structural foundation for understanding the light-energy capture and transfer in cryptophyte PSII-ACPII, evolutionary variations in PSII-LHCII, and the origin of red-lineage LHCIIs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Microscopía por Crioelectrón / Criptófitas / Complejos de Proteína Captadores de Luz / Complejo de Proteína del Fotosistema II Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Microscopía por Crioelectrón / Criptófitas / Complejos de Proteína Captadores de Luz / Complejo de Proteína del Fotosistema II Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido