› 6igz

Electron Microscopy
3.49Å resolution

Structure of PSI-LHCI

Released:
DOI: 10.2210/pdb6igz/pdb
PDB entry 6igz coloured by chain, front view.
PDB entry 6igz coloured by chain, side view.
PDB entry 6igz coloured by chain, top view.
Source organism: Bryopsis corticulans
Primary publication:
Structure of a green algal photosystem I in complex with a large number of light-harvesting complex I subunits.
Qin X, Pi X, Wang W, Han G, Zhu L, Liu M, Cheng L, Shen JR, Kuang T, Sui SF
Nat Plants 5 263-272 (2019)
PMID: 30850820
Related structures: EMD-9670

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-101134 (preferred)
Entry contents:
21 distinct polypeptide molecules
Macromolecules (21 distinct):
Photosystem I P700 chlorophyll a apoprotein A1 Chain: A
Molecule details ›
Chain: A
Length: 751 amino acids
Theoretical weight: 83.41 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ2 (Residues: 1-751; Coverage: 100%)
Sequence domains: Photosystem I psaA/psaB protein
photosystem I Chain: B
Molecule details ›
Chain: B
Length: 734 amino acids
Theoretical weight: 82.16 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H003 (Residues: 1-734; Coverage: 100%)
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I iron-sulfur center Chain: C
Molecule details ›
Chain: C
Length: 81 amino acids
Theoretical weight: 8.88 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H005 (Residues: 1-81; Coverage: 100%)
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: 198 amino acids
Theoretical weight: 21.73 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H006 (Residues: 1-198; Coverage: 100%)
Sequence domains: PsaD
PsaE Chain: E
Molecule details ›
Chain: E
Length: 91 amino acids
Theoretical weight: 10.1 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H007 (Residues: 1-91; Coverage: 100%)
Sequence domains: Photosystem I reaction centre subunit IV / PsaE
Structure domains: SH3 type barrels.
Photosystem I reaction center subunit III Chain: F
Molecule details ›
Chain: F
Length: 236 amino acids
Theoretical weight: 25.13 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H008 (Residues: 1-236; Coverage: 100%)
Sequence domains: Photosystem I reaction centre subunit III
Structure domains: Photosystem I PsaF, reaction centre subunit III
PsaG Chain: G
Molecule details ›
Chain: G
Length: 167 amino acids
Theoretical weight: 18.23 KDa
Source organism: Bryopsis corticulans
PsaH Chain: H
Molecule details ›
Chain: H
Length: 133 amino acids
Theoretical weight: 14.4 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H009 (Residues: 1-133; Coverage: 100%)
Sequence domains: Photosystem I reaction centre subunit VI
Photosystem I reaction center subunit VIII Chain: I
Molecule details ›
Chain: I
Length: 36 amino acids
Theoretical weight: 3.86 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H010 (Residues: 1-36; Coverage: 100%)
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: 4.74 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ3 (Residues: 1-41; Coverage: 100%)
Sequence domains: Photosystem I reaction centre subunit IX / PsaJ
Structure domains: Single helix bin
PsaK Chain: K
Molecule details ›
Chain: K
Length: 123 amino acids
Theoretical weight: 12.49 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ4 (Residues: 1-123; Coverage: 100%)
Sequence domains: Photosystem I psaG / psaK
PSI subunit V Chain: L
Molecule details ›
Chain: L
Length: 204 amino acids
Theoretical weight: 21.34 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ5 (Residues: 1-204; Coverage: 100%)
Sequence domains: Photosystem I reaction centre subunit XI
Chlorophyll a-b binding protein, chloroplastic Chains: 1, 5
Molecule details ›
Chains: 1, 5
Length: 226 amino acids
Theoretical weight: 24.46 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ6 (Residues: 1-226; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 2
Molecule details ›
Chain: 2
Length: 256 amino acids
Theoretical weight: 27.81 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ7 (Residues: 1-256; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 3
Molecule details ›
Chain: 3
Length: 281 amino acids
Theoretical weight: 30.41 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ8 (Residues: 1-281; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chains: 4, 8
Molecule details ›
Chains: 4, 8
Length: 248 amino acids
Theoretical weight: 26.58 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8GZZ9 (Residues: 1-248; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 6
Molecule details ›
Chain: 6
Length: 267 amino acids
Theoretical weight: 29.3 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H000 (Residues: 1-267; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 7
Molecule details ›
Chain: 7
Length: 264 amino acids
Theoretical weight: 28.62 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H001 (Residues: 1-264; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 9
Molecule details ›
Chain: 9
Length: 222 amino acids
Theoretical weight: 24.15 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H002 (Residues: 1-222; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Chlorophyll a-b binding protein, chloroplastic Chain: 0
Molecule details ›
Chain: 0
Length: 245 amino acids
Theoretical weight: 26.91 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A4V8H004 (Residues: 1-245; Coverage: 100%)
Sequence domains: Chlorophyll A-B binding protein
Photosystem I reaction center subunit XII Chain: M
Molecule details ›
Chain: M
Length: 32 amino acids
Theoretical weight: 3.51 KDa
Source organism: Bryopsis corticulans
UniProt:
  • Canonical: A0A0D6E2L8 (Residues: 1-32; Coverage: 100%)
Gene name: psaM
Sequence domains: Photosystem I protein M (PsaM)

Ligands and Environments

10 bound ligands:
Ligand CLA 218 x CLA
Ligand PQN 2 x PQN
Ligand LHG 11 x LHG
Ligand 8CT 34 x 8CT
Ligand HTG 2 x HTG
Ligand SF4 3 x SF4
Ligand DGD 1 x DGD
Ligand CHL 26 x CHL
Ligand XAT 20 x XAT
Ligand LMG 3 x LMG
No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 3.49Å
Relevant EMDB volumes: EMD-9670

Quick links

Citations

4 review citations

Dynamic Regulation of the Light-Harvesting System through State Transitions in Land Plants and Green Algae.
Shang et al. (2023)
3 more

3 mentions without citation

Role of an ancient light-harvesting protein of PSI in light absorption and photoprotection.
Lu et al. (2021)
2 more