title: Structure and energy transfer pathways of the plant photosystem I-LHCI supercomplex.
abstract: Photosystem I (PSI) is one of the two photosystems in oxygenic photosynthesis, and absorbs light energy to generate reducing power for the reduction of NADP+to NADPH with a quantum efficiency close to 100%. The plant PSI core forms a supercomplex with light-harvesting complex I (LHCI) with a total molecular weight of over 600kDa. Recent X-ray structure analysis of the PSI-LHCI membrane-protein supercomplex has revealed detailed arrangement of the light-harvesting pigments and other cofactors especially within LHCI. Here we introduce the overall structure of the PSI-LHCI supercomplex, and then focus on the excited energy transfer (EET) pathways from LHCI to the PSI core and photoprotection mechanisms based on the structure obtained.
authors.affiliation: Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Tsushima Naka 3-1-1, Okayama 700-8530, Japan.
authors.forename: Michihiro
authors.initials: M
authors.lastname: Suga
authors.affiliation: Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Tsushima Naka 3-1-1, Okayama 700-8530, Japan; Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Qin
authors.affiliation: Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. Electronic address: kuangty@ibcas.ac.cn.
authors.forename: Tingyun
authors.initials: T
authors.lastname: Kuang
authors.affiliation: Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Tsushima Naka 3-1-1, Okayama 700-8530, Japan; Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. Electronic address: shen@okayama-u.ac.jp.
authors.forename: Jian-Ren
authors.initials: JR
authors.lastname: Shen
mesh_terms: D004735:Energy Transfer; D045342:Light-Harvesting Protein Complexes / Q000737:chemistry* / Q000378:metabolism*; D055668:Photochemical Processes; D045331:Photosystem I Protein Complex / Q000737:chemistry* / Q000378:metabolism*; D010944:Plants / Q000201:enzymology / Q000378:metabolism*
chemical_list: D045342:Light-Harvesting Protein Complexes; D045331:Photosystem I Protein Complex