6k61

Electron Microscopy
2.37Å resolution

Cryo-EM structure of the tetrameric photosystem I from a heterocyst-forming cyanobacterium Anabaena sp. PCC7120

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero 24-mer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-141244 (preferred)
Entry contents:
12 distinct polypeptide molecules
Macromolecules (12 distinct):
Photosystem I P700 chlorophyll a apoprotein A1 Chains: A, a
Molecule details ›
Chains: A, a
Length: 752 amino acids
Theoretical weight: 83.29 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58576 (Residues: 1-752; Coverage: 100%)
Gene names: alr5154, psaA
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I 4.8 kDa protein Chains: X, x
Molecule details ›
Chains: X, x
Length: 44 amino acids
Theoretical weight: 4.87 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58566 (Residues: 1-44; Coverage: 100%)
Gene names: asr1283, psaX
Sequence domains: PsaX family
Photosystem I P700 chlorophyll a apoprotein A2 1 Chains: B, b
Photosystem I iron-sulfur center Chains: C, c
Photosystem I reaction center subunit II Chains: D, d
Photosystem I reaction center subunit IV Chains: E, e
Photosystem I reaction center subunit III Chains: F, f
Photosystem I reaction center subunit IX Chains: J, j
Photosystem I reaction center subunit PsaK 1 Chains: K, k
Photosystem I reaction center subunit VIII Chains: I, i
Photosystem I reaction center subunit XI Chains: L, l
Photosystem I reaction center subunit XII Chains: M, m

Ligands and Environments

Experiments and Validation Details

Entry percentile scores
Resolution: 2.37Å
Relevant EMDB volumes: EMD-9918