- EMDB-11326: Photosystem I reduced Plastocyanin Complex -
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Open data
ID or keywords:
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Basic information
Entry
Database: EMDB / ID: EMD-11326
Title
Photosystem I reduced Plastocyanin Complex
Map data
Sample
Complex: Photosystem I plastocyanin complex
Protein or peptide: x 14 types
Protein or peptide: x 3 types
Ligand: x 16 types
Keywords
Photosystem I / membrane protein / PHOTOSYNTHESIS
Function / homology
Function and homology information
response to low light intensity stimulus / : / plastoglobule / response to high light intensity / chloroplast thylakoid / photosynthesis, light harvesting in photosystem I / thylakoid / chloroplast thylakoid lumen / photosynthesis, light harvesting / chloroplast envelope ...response to low light intensity stimulus / : / plastoglobule / response to high light intensity / chloroplast thylakoid / photosynthesis, light harvesting in photosystem I / thylakoid / chloroplast thylakoid lumen / photosynthesis, light harvesting / chloroplast envelope / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / photosystem II / chlorophyll binding / chloroplast thylakoid membrane / photosynthesis / response to cold / chloroplast / 4 iron, 4 sulfur cluster binding / electron transfer activity / oxidoreductase activity / protein domain specific binding / copper ion binding / mRNA binding / magnesium ion binding / metal ion binding Similarity search - Function
Photosystem I reaction center subunit V / Plastocyanin / 4Fe-4S dicluster domain / Photosystem I reaction center subunit psaK, plant / Photosystem I reaction center subunit V/PsaK, plant / Photosystem I PsaG/PsaK domain, chloroplastic / Photosystem I reaction centre subunit PsaK superfamily / Blue (type 1) copper protein, plastocyanin-type / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK ...Photosystem I reaction center subunit V / Plastocyanin / 4Fe-4S dicluster domain / Photosystem I reaction center subunit psaK, plant / Photosystem I reaction center subunit V/PsaK, plant / Photosystem I PsaG/PsaK domain, chloroplastic / Photosystem I reaction centre subunit PsaK superfamily / Blue (type 1) copper protein, plastocyanin-type / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / 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 / Photosystem I PsaD / Photosystem I, reaction centre subunit PsaD superfamily / PsaD / Photosystem I PsaE, reaction centre subunit IV / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I reaction centre subunit IV / PsaE / Chlorophyll A-B binding protein, plant and chromista / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I reaction centre subunit IX / PsaJ / Chlorophyll A-B binding protein / Chlorophyll A-B binding protein / Photosystem I protein PsaC / Photosystem I PsaB / Photosystem I PsaA / 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 / Blue (type 1) copper domain / Copper binding proteins, plastocyanin/azurin family / Blue (type 1) copper protein, binding site / Type-1 copper (blue) proteins signature. / 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 / Cupredoxin Similarity search - Domain/homology
Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I reaction center subunit III / Photosystem I reaction center subunit V, chloroplastic / Photosystem I reaction center subunit IX / Photosystem I reaction center subunit IV / Photosystem I reaction center subunit II, chloroplastic / PSI-K / Photosystem I iron-sulfur center / Plastocyanin, chloroplastic ...Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I reaction center subunit III / Photosystem I reaction center subunit V, chloroplastic / Photosystem I reaction center subunit IX / Photosystem I reaction center subunit IV / Photosystem I reaction center subunit II, chloroplastic / PSI-K / Photosystem I iron-sulfur center / Plastocyanin, chloroplastic / Photosystem I reaction center subunit VIII / Chlorophyll a-b binding protein 6, chloroplastic / Chlorophyll a-b binding protein 3, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein P4, chloroplastic Similarity search - Component
Biological species
Pisum sativum (garden pea)
Method
single particle reconstruction / cryo EM / Resolution: 2.74 Å
German-Israeli Foundation for Research and Development
G-1483-207/2018
Israel
European Research Council (ERC)
723991
Belgium
Citation
Journal: Biochem J / Year: 2021 Title: Structure of plant photosystem I-plastocyanin complex reveals strong hydrophobic interactions. Authors: Ido Caspy / Mariia Fadeeva / Sebastian Kuhlgert / Anna Borovikova-Sheinker / Daniel Klaiman / Gal Masrati / Friedel Drepper / Nir Ben-Tal / Michael Hippler / Nathan Nelson / Abstract: Photosystem I is defined as plastocyanin-ferredoxin oxidoreductase. Taking advantage of genetic engineering, kinetic analyses and cryo-EM, our data provide novel mechanistic insights into binding and ...Photosystem I is defined as plastocyanin-ferredoxin oxidoreductase. Taking advantage of genetic engineering, kinetic analyses and cryo-EM, our data provide novel mechanistic insights into binding and electron transfer between PSI and Pc. Structural data at 2.74 Å resolution reveals strong hydrophobic interactions in the plant PSI-Pc ternary complex, leading to exclusion of water molecules from PsaA-PsaB/Pc interface once the PSI-Pc complex forms. Upon oxidation of Pc, a slight tilt of bound oxidized Pc allows water molecules to accommodate the space between Pc and PSI to drive Pc dissociation. Such a scenario is consistent with the six times larger dissociation constant of oxidized as compared with reduced Pc and mechanistically explains how this molecular machine optimized electron transfer for fast turnover.
History
Deposition
Jul 7, 2020
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Header (metadata) release
Jun 16, 2021
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Map release
Jun 16, 2021
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Update
Apr 9, 2025
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Current status
Apr 9, 2025
Processing site: PDBe / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
UniProtKB: Photosystem I reaction center subunit V, chloroplastic
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Macromolecule #8: Photosystem I reaction center subunit VI,Photosystem I reaction c...
Macromolecule
Name: Photosystem I reaction center subunit VI,Photosystem I reaction center subunit VI type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO
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