› 6pnj

Electron Microscopy
3.19Å resolution

Structure of Photosystem I Acclimated to Far-red Light

Released:
DOI: 10.2210/pdb6pnj/pdb
PDB entry 6pnj coloured by chain, front view.
PDB entry 6pnj coloured by chain, side view.
PDB entry 6pnj coloured by chain, top view.
Source organism: Fischerella thermalis PCC 7521
Primary publication:
The structure of Photosystem I acclimated to far-red light illuminates an ecologically important acclimation process in photosynthesis
Gisriel C, Shen G, Kurashov V, Ho MY, Zhang S, Williams D, Golbeck JH, Fromme P, Bryant DA
Sci Adv 6 eaay6415- (2020)
Related structures: EMD-20397

Function and Biology Details

Reaction catalysed: 
Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero 36-mer (preferred)
PDBe Complex ID:
PDB-CPX-124538 (preferred)
Entry contents:
12 distinct polypeptide molecules
Macromolecules (12 distinct):
Photosystem I P700 chlorophyll a apoprotein A1 Chains: A, G, a
Molecule details ›
Chains: A, G, a
Length: 788 amino acids
Theoretical weight: 87.63 KDa
Source organism: Fischerella thermalis PCC 7521
Photosystem I P700 chlorophyll a apoprotein A2 Chains: B, H, b
Molecule details ›
Chains: B, H, b
Length: 741 amino acids
Theoretical weight: 83.45 KDa
Source organism: Fischerella thermalis PCC 7521
Photosystem I iron-sulfur center Chains: C, N, c
Photosystem I reaction center subunit II Chains: D, O, d
Photosystem I reaction center subunit IV Chains: E, P, e
Photosystem I reaction center subunit III Chains: F, Q, f
photosystem I subunit VIII Chains: I, R, i
Photosystem I reaction centre subunit IX / PsaJ Chains: J, S, j
Photosystem I reaction center subunit PsaK Chains: K, T, k
Photosystem I reaction center subunit XI Chains: L, U, l
Photosystem I reaction center subunit XII Chains: M, V, m
Photosystem one PsaX Chains: W, X, x

Ligands and Environments

10 bound ligands:
Ligand CL0 3 x CL0
Ligand CLA 252 x CLA
Ligand F6C 12 x F6C
Ligand PQN 6 x PQN
Ligand SF4 9 x SF4
Ligand BCR 63 x BCR
Ligand LHG 6 x LHG
Ligand LMG 12 x LMG
Ligand LMT 6 x LMT
Ligand CA 3 x CA
No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 3.19Å
Relevant EMDB volumes: EMD-20397

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