› 6fos

X-ray diffraction
4Å resolution

Cyanidioschyzon merolae photosystem I

Released:
DOI: 10.2210/pdb6fos/pdb
PDB entry 6fos coloured by chain, front view.
PDB entry 6fos coloured by chain, side view.
PDB entry 6fos coloured by chain, top view.
Source organism: Cyanidioschyzon merolae strain 10D
Primary publication:
Structure and function of photosystem I in Cyanidioschyzon merolae.
Antoshvili M, Caspy I, Hippler M, Nelson N
Photosynth Res 139 499-508 (2019)
PMID: 29582227

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 pentadecamer (preferred)
PDBe Complex ID:
PDB-CPX-125955 (preferred)
Entry contents:
14 distinct polypeptide molecules
Macromolecules (14 distinct):
Similar to chlorophyll a/b-binding protein, CP24 Chains: 2, 3
Molecule details ›
Chains: 2, 3
Length: 222 amino acids
Theoretical weight: 24.27 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: M1UU36 (Residues: 1-222; Coverage: 100%)
Gene name: CYME_CMN234C
Sequence domains: Chlorophyll A-B binding protein
Similar to light harvesting protein Chain: 4
Molecule details ›
Chain: 4
Length: 214 amino acids
Theoretical weight: 23.99 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: M1VKK5 (Residues: 1-214; Coverage: 100%)
Gene name: CYME_CMQ142C
Sequence domains: Chlorophyll A-B binding protein
Photosystem I P700 chlorophyll a apoprotein A1 Chain: A
Molecule details ›
Chain: A
Length: 740 amino acids
Theoretical weight: 81.83 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FY7 (Residues: 9-748; Coverage: 99%)
Gene name: psaA
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I P700 chlorophyll a apoprotein A2 Chain: B
Molecule details ›
Chain: B
Length: 725 amino acids
Theoretical weight: 81.3 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FY6 (Residues: 8-732; Coverage: 99%)
Gene name: psaB
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I iron-sulfur center Chain: C
Molecule details ›
Chain: C
Length: 80 amino acids
Theoretical weight: 8.69 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85G47 (Residues: 2-81; Coverage: 99%)
Gene name: psaC
Sequence domains: 4Fe-4S dicluster domain
Structure domains: Alpha-Beta Plaits
Photosystem I reaction center subunit II Chain: D
Molecule details ›
Chain: D
Length: 124 amino acids
Theoretical weight: 13.9 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FY0 (Residues: 6-129; Coverage: 89%)
Gene name: psaD
Sequence domains: PsaD
Photosystem I iron-sulfur center subunit VII Chain: E
Molecule details ›
Chain: E
Length: 69 amino acids
Theoretical weight: 7.89 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FZ1 (Residues: 1-69; Coverage: 73%)
Gene name: psaE
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: 155 amino acids
Theoretical weight: 18.06 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FS9 (Residues: 31-185; Coverage: 99%)
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 VIII Chain: I
Molecule details ›
Chain: I
Length: 32 amino acids
Theoretical weight: 3.41 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FQ6 (Residues: 1-32; Coverage: 100%)
Gene name: psaI
Sequence domains: Photosystem I reaction centre subunit VIII
Photosystem I reaction center subunit IX Chain: J
Molecule details ›
Chain: J
Length: 38 amino acids
Theoretical weight: 4.41 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FS8 (Residues: 1-38; Coverage: 100%)
Gene name: psaJ
Sequence domains: Photosystem I reaction centre subunit IX / PsaJ
PSI-K Chain: K
Molecule details ›
Chain: K
Length: 47 amino acids
Theoretical weight: 4.82 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85G51 (Residues: 14-60; Coverage: 78%)
Gene name: psaK
Sequence domains: Photosystem I psaG / psaK
Photosystem I reaction center subunit XI Chain: L
Molecule details ›
Chain: L
Length: 140 amino acids
Theoretical weight: 15.16 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85FP8 (Residues: 1-140; Coverage: 100%)
Gene name: psaL
Sequence domains: Photosystem I reaction centre subunit XI
Photosystem I reaction center subunit XII Chain: M
Molecule details ›
Chain: M
Length: 29 amino acids
Theoretical weight: 3.14 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: Q85G73 (Residues: 1-29; Coverage: 100%)
Gene name: psaM
Sequence domains: Photosystem I protein M (PsaM)
Photosystem I subunit O Chain: O
Molecule details ›
Chain: O
Length: 98 amino acids
Theoretical weight: 10.63 KDa
Source organism: Cyanidioschyzon merolae strain 10D
UniProt:
  • Canonical: M1VFJ4 (Residues: 51-148; Coverage: 63%)
Gene name: CYME_CMP086C

Ligands and Environments

4 bound ligands:
Ligand CLA 134 x CLA
Ligand PQN 2 x PQN
Ligand SF4 3 x SF4
Ligand BCR 8 x BCR
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SLS BEAMLINE X06SA
Spacegroup: C2221
Unit cell:
a: 163.13Å b: 213.52Å c: 349.58Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.379 0.378 0.43

Quick links

Citations

7 review citations

Silver Island Film for Enhancing Light Harvesting in Natural Photosynthetic Proteins.
Kowalska et al. (2020)
6 more