photosynthesis, light harvesting / thylakoid membrane / : / photosystem I reaction center / photosystem I / photosystem I / photosystem II / chlorophyll binding / photosynthetic electron transport in photosystem I / chloroplast thylakoid membrane ...photosynthesis, light harvesting / thylakoid membrane / : / photosystem I reaction center / photosystem I / photosystem I / photosystem II / chlorophyll binding / photosynthetic electron transport in photosystem I / chloroplast thylakoid membrane / photosynthesis / 4 iron, 4 sulfur cluster binding / membrane => GO:0016020 / oxidoreductase activity / electron transfer activity / metal ion binding Similarity search - Function
: / Photosystem I PsaH, reaction centre subunit VI / Photosystem I reaction centre subunit VI / Photosystem I reaction center subunit psaK, plant / Photosystem I reaction center subunit V/PsaK, plant / Photosystem I PsaG/PsaK domain, chloroplastic / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction center subunit V/PsaK ...: / Photosystem I PsaH, reaction centre subunit VI / Photosystem I reaction centre subunit VI / Photosystem I reaction center subunit psaK, plant / Photosystem I reaction center subunit V/PsaK, plant / Photosystem I PsaG/PsaK domain, chloroplastic / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / Photosystem I PsaL, reaction centre subunit XI / Photosystem I, reaction centre subunit XI / Photosystem I PsaL, reaction centre subunit XI superfamily / Photosystem I reaction centre subunit XI / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII superfamily / Photosystem I PsaF, reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III superfamily / Photosystem I reaction centre subunit III / Chlorophyll A-B binding protein, plant and chromista / Photosystem I PsaD / Chlorophyll A-B binding protein / Photosystem I, reaction centre subunit PsaD superfamily / Chlorophyll A-B binding protein / PsaD / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I reaction centre subunit IX / PsaJ / Photosystem I PsaE, reaction centre subunit IV / Photosystem I reaction centre subunit IV / PsaE / Photosystem I protein PsaC / Photosystem I PsaA / Photosystem I PsaB / Photosystem I PsaA/PsaB, conserved site / Photosystem I psaA and psaB proteins signature. / Photosystem I PsaA/PsaB / Photosystem I PsaA/PsaB superfamily / Photosystem I psaA/psaB protein / Electron transport accessory-like domain superfamily / 4Fe-4S dicluster domain / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain Similarity search - Domain/homology
Photosystem I reaction center subunit XII / Photosystem I P700 chlorophyll a apoprotein A1 / PSI-J / PsaK / PSI subunit V / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic ...Photosystem I reaction center subunit XII / Photosystem I P700 chlorophyll a apoprotein A1 / PSI-J / PsaK / PSI subunit V / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Photosystem I / Chlorophyll a-b binding protein, chloroplastic / 9 kDa polypeptide / PsaD / PsaE / PSI-F / PsaH / Photosystem I reaction center subunit VIII Similarity search - Component
Biological species
Bryopsis corticulans (plant)
Method
single particle reconstruction / cryo EM / Resolution: 3.49 Å
Journal: Nat Plants / Year: 2019 Title: Structure of a green algal photosystem I in complex with a large number of light-harvesting complex I subunits. Authors: Xiaochun Qin / Xiong Pi / Wenda Wang / Guangye Han / Lixia Zhu / Mingmei Liu / Linpeng Cheng / Jian-Ren Shen / Tingyun Kuang / Sen-Fang Sui / Abstract: Photosystem I (PSI) is a highly efficient natural light-energy converter, and has diverse light-harvesting antennas associated with its core in different photosynthetic organisms. In green algae, an ...Photosystem I (PSI) is a highly efficient natural light-energy converter, and has diverse light-harvesting antennas associated with its core in different photosynthetic organisms. In green algae, an extremely large light-harvesting complex I (LHCI) captures and transfers energy to the PSI core. Here, we report the structure of PSI-LHCI from a green alga Bryopsis corticulans at 3.49 Å resolution, obtained by single-particle cryo-electron microscopy, which revealed 13 core subunits including subunits characteristic of both prokaryotes and eukaryotes, and 10 light-harvesting complex a (Lhca) antennas that form a double semi-ring and an additional Lhca dimer, including a novel four-transmembrane-helix Lhca. In total, 244 chlorophylls were identified, some of which were located at key positions for the fast energy transfer. These results provide a firm structural basis for unravelling the mechanisms of light-energy harvesting, transfer and quenching in the green algal PSI-LHCI, and important clues as to how PSI-LHCI has changed during evolution.
History
Deposition
Sep 27, 2018
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Header (metadata) release
Feb 13, 2019
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Map release
Feb 13, 2019
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Update
Mar 4, 2020
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Current status
Mar 4, 2020
Processing site: PDBj / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
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