› 6ijo

Electron Microscopy
3.3Å resolution

Photosystem I of Chlamydomonas reinhardtii

Released:
DOI: 10.2210/pdb6ijo/pdb
PDB entry 6ijo coloured by chain, front view.
PDB entry 6ijo coloured by chain, side view.
PDB entry 6ijo coloured by chain, top view.
Source organism: Chlamydomonas reinhardtii
Primary publication:
Antenna arrangement and energy transfer pathways of a green algal photosystem-I-LHCI supercomplex.
Su X, Ma J, Pan X, Zhao X, Chang W, Liu Z, Zhang X, Li M
Nat Plants 5 273-281 (2019)
PMID: 30850819
Related structures: EMD-9680

Function and Biology Details

Reaction catalysed: 
Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin
Biochemical function:
Biological process:
Cellular component:
Sequence domains:

Structure analysis Details

Assembly composition:
hetero 23-mer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-108666 (preferred)
Entry contents:
22 distinct polypeptide molecules
Macromolecules (22 distinct):
Photosystem I P700 chlorophyll a apoprotein A1 Chain: A
Molecule details ›
Chain: A
Length: 751 amino acids
Theoretical weight: 83.24 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P12154 (Residues: 1-751; Coverage: 100%)
Gene names: ps1a1, psaA
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I P700 chlorophyll a apoprotein A2 Chain: B
Molecule details ›
Chain: B
Length: 735 amino acids
Theoretical weight: 82.18 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P09144 (Residues: 1-735; Coverage: 100%)
Gene names: ps1a2, psaB
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I iron-sulfur center Chain: C
Molecule details ›
Chain: C
Length: 81 amino acids
Theoretical weight: 8.87 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q00914 (Residues: 1-81; Coverage: 100%)
Gene name: psaC
Sequence domains: 4Fe-4S dicluster domain
Structure domains: Alpha-Beta Plaits
Photosystem I reaction center subunit II, chloroplastic Chain: D
Molecule details ›
Chain: D
Length: 247 amino acids
Theoretical weight: 27.3 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q39615 (Residues: 1-196; Coverage: 100%)
Gene name: psaD
Sequence domains: PsaD
Photosystem I reaction center subunit IV, chloroplastic Chain: E
Molecule details ›
Chain: E
Length: 143 amino acids
Theoretical weight: 16.22 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P12352 (Residues: 1-97; Coverage: 100%)
Gene name: PSAE
Sequence domains: Photosystem I reaction centre subunit IV / PsaE
Structure domains: SH3 type barrels.
Photosystem I reaction center subunit III, chloroplastic Chain: F
Molecule details ›
Chain: F
Length: 227 amino acids
Theoretical weight: 24.09 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P12356 (Residues: 1-227; Coverage: 100%)
Gene name: PSAF
Sequence domains: Photosystem I reaction centre subunit III
Structure domains: Photosystem I PsaF, reaction centre subunit III
Photosystem I reaction center subunit V, chloroplastic Chain: G
Molecule details ›
Chain: G
Length: 159 amino acids
Theoretical weight: 16.72 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P14224 (Residues: 3-126; Coverage: 98%)
Gene name: PSAG
Sequence domains: Photosystem I psaG / psaK
Photosystem I reaction center subunit VI, chloroplastic Chain: H
Molecule details ›
Chain: H
Length: 155 amino acids
Theoretical weight: 17.1 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P13352 (Residues: 1-130; Coverage: 100%)
Gene name: PSAH
Sequence domains: Photosystem I reaction centre subunit VI
Photosystem I reaction center subunit VIII Chain: I
Molecule details ›
Chain: I
Length: 106 amino acids
Theoretical weight: 10.59 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: A8IFG7 (Residues: 1-106; Coverage: 100%)
Gene name: CHLRE_03g165100v5
Sequence domains: Photosystem I reaction centre subunit VIII
Photosystem I reaction center subunit IX Chain: J
Molecule details ›
Chain: J
Length: 41 amino acids
Theoretical weight: 4.75 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P59777 (Residues: 1-41; Coverage: 100%)
Gene name: psaJ
Sequence domains: Photosystem I reaction centre subunit IX / PsaJ
Structure domains: Single helix bin
Photosystem I reaction center subunit psaK, chloroplastic Chain: K
Molecule details ›
Chain: K
Length: 160 amino acids
Theoretical weight: 16.41 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: P14225 (Residues: 1-113; Coverage: 100%)
Gene name: PSAK
Sequence domains: Photosystem I psaG / psaK
PSI subunit V Chain: L
Molecule details ›
Chain: L
Length: 258 amino acids
Theoretical weight: 27.2 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: A8IL32 (Residues: 1-196; Coverage: 100%)
Gene name: CHLRE_12g486300v5
Sequence domains: Photosystem I reaction centre subunit XI
Chlorophyll a-b binding protein, chloroplastic Chains: 1, a
Molecule details ›
Chains: 1, a
Length: 248 amino acids
Theoretical weight: 26.14 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q05093 (Residues: 1-228; Coverage: 100%)
Gene names: CHLRE_06g283050v5, LhcI-6, Lhca1
Sequence domains: Chlorophyll A-B binding protein
Lhca3 Chain: 3
Molecule details ›
Chain: 3
Length: 298 amino acids
Theoretical weight: 32.63 KDa
Source organism: Chlamydomonas reinhardtii
Lhca4 Chain: 4
Molecule details ›
Chain: 4
Length: 290 amino acids
Theoretical weight: 31.46 KDa
Source organism: Chlamydomonas reinhardtii
Chlorophyll a-b binding protein, chloroplastic Chain: 5
Molecule details ›
Chain: 5
Length: 274 amino acids
Theoretical weight: 30.15 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q75VY8 (Residues: 1-257; Coverage: 100%)
Gene names: CHLRE_10g425900v5, LhcI-3
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 6
Molecule details ›
Chain: 6
Length: 318 amino acids
Theoretical weight: 35.12 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q75VY6 (Residues: 1-257; Coverage: 100%)
Gene names: CHLRE_06g278213v5, LhcI-5
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 7
Molecule details ›
Chain: 7
Length: 241 amino acids
Theoretical weight: 26.25 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q75VY4 (Residues: 1-241; Coverage: 100%)
Gene name: LhcI-7
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 8
Molecule details ›
Chain: 8
Length: 272 amino acids
Theoretical weight: 29.18 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: Q75VY7 (Residues: 1-243; Coverage: 100%)
Gene names: CHLRE_06g272650v5, LhcI-4
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 2
Molecule details ›
Chain: 2
Length: 227 amino acids
Theoretical weight: 24.95 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: A8IKC8 (Residues: 20-246; Coverage: 92%)
Gene name: CHLRE_12g508750v5
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 9
Molecule details ›
Chain: 9
Length: 213 amino acids
Theoretical weight: 22.87 KDa
Source organism: Chlamydomonas reinhardtii
UniProt:
  • Canonical: A8ITV3 (Residues: 1-213; Coverage: 100%)
Gene name: CHLRE_07g344950v5
Sequence domains: Chlorophyll A-B binding protein
ChainX Chain: X
Molecule details ›
Chain: X
Length: 26 amino acids
Theoretical weight: 1.87 KDa
Source organism: Chlamydomonas reinhardtii

Ligands and Environments

11 bound ligands:
Ligand CLA 243 x CLA
Ligand PQN 2 x PQN
Ligand LHG 16 x LHG
Ligand BCR 31 x BCR
Ligand SF4 3 x SF4
Ligand LMU 7 x LMU
Ligand LMG 7 x LMG
Ligand DGD 2 x DGD
Ligand LUT 10 x LUT
Ligand XAT 10 x XAT
Ligand NEX 2 x NEX
No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 3.3Å
Relevant EMDB volumes: EMD-9680

Quick links

Citations

2 review citations

Potential and Challenges of Improving Photosynthesis in Algae.
Vecchi et al. (2020)
1 more

8 mentions without citation

New Insights into the Evolution of the Electron Transfer from Cytochrome f to Photosystem I in the Green and Red Branches of Photosynthetic Eukaryotes.
Castell et al. (2021)
7 more