› 6pnj

Electron Microscopy
3.2Å 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:
Biological process:
Cellular component:
Sequence domains:

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
UniProt:
  • Canonical: G6FME9 (Residues: 1-788; Coverage: 100%)
Gene names: FJSC11DRAFT_0046, psaA
Sequence domains: Photosystem I psaA/psaB protein
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
UniProt:
  • Canonical: G6FMF0 (Residues: 1-741; Coverage: 100%)
Gene names: FJSC11DRAFT_0047, psaB
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I iron-sulfur center Chains: C, N, c
Molecule details ›
Chains: C, N, c
Length: 81 amino acids
Theoretical weight: 8.85 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FW50 (Residues: 1-81; Coverage: 100%)
Gene names: FJSC11DRAFT_3141, psaC
Sequence domains: 4Fe-4S dicluster domain
Photosystem I reaction center subunit II Chains: D, O, d
Molecule details ›
Chains: D, O, d
Length: 159 amino acids
Theoretical weight: 17.78 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FW99 (Residues: 1-159; Coverage: 100%)
Gene name: FJSC11DRAFT_3192
Sequence domains: PsaD
Photosystem I reaction center subunit IV Chains: E, P, e
Molecule details ›
Chains: E, P, e
Length: 72 amino acids
Theoretical weight: 8.07 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FQU3 (Residues: 1-72; Coverage: 100%)
Gene names: FJSC11DRAFT_1240, psaE
Sequence domains: Photosystem I reaction centre subunit IV / PsaE
Photosystem I reaction center subunit III Chains: F, Q, f
Molecule details ›
Chains: F, Q, f
Length: 159 amino acids
Theoretical weight: 17.79 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FMD3 (Residues: 1-159; Coverage: 100%)
Gene name: FJSC11DRAFT_0030
Sequence domains: Photosystem I reaction centre subunit III
photosystem I subunit VIII Chains: I, R, i
Molecule details ›
Chains: I, R, i
Length: 67 amino acids
Theoretical weight: 7.74 KDa
Source organism: Fischerella thermalis PCC 7521
Photosystem I reaction centre subunit IX / PsaJ Chains: J, S, j
Molecule details ›
Chains: J, S, j
Length: 48 amino acids
Theoretical weight: 5.44 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FMD2 (Residues: 1-48; Coverage: 100%)
Gene name: FJSC11DRAFT_0029
Sequence domains: Photosystem I reaction centre subunit IX / PsaJ
Photosystem I reaction center subunit PsaK Chains: K, T, k
Molecule details ›
Chains: K, T, k
Length: 39 amino acids
Theoretical weight: 3.62 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FV28 (Residues: 60-82; Coverage: 28%)
Gene name: FJSC11DRAFT_2725
Sequence domains: Photosystem I psaG / psaK
Photosystem I reaction center subunit XI Chains: L, U, l
Molecule details ›
Chains: L, U, l
Length: 174 amino acids
Theoretical weight: 18.54 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FMF1 (Residues: 1-174; Coverage: 100%)
Gene name: FJSC11DRAFT_0048
Sequence domains: Photosystem I reaction centre subunit XI
Photosystem I reaction center subunit XII Chains: M, V, m
Molecule details ›
Chains: M, V, m
Length: 31 amino acids
Theoretical weight: 3.47 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FWT6 (Residues: 1-31; Coverage: 100%)
Gene names: FJSC11DRAFT_3335, psaM
Sequence domains: Photosystem I protein M (PsaM)
Photosystem one PsaX Chains: W, X, x
Molecule details ›
Chains: W, X, x
Length: 101 amino acids
Theoretical weight: 11.13 KDa
Source organism: Fischerella thermalis PCC 7521
UniProt:
  • Canonical: G6FSH2 (Residues: 1-101; Coverage: 100%)
Gene name: FJSC11DRAFT_1719
Sequence domains: PsaX family

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: 3.2Å
Relevant EMDB volumes: EMD-20397

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