6kif

Electron Microscopy
3.3Å resolution

Structure of cyanobacterial photosystem I-IsiA-flavodoxin supercomplex

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero 54-mer (preferred)
PDBe Complex ID:
PDB-CPX-145282 (preferred)
Entry contents:
13 distinct polypeptide molecules
Macromolecules (13 distinct):
Photosystem I P700 chlorophyll a apoprotein A1 Chains: A, G, e
Molecule details ›
Chains: A, G, e
Length: 763 amino acids
Theoretical weight: 83.99 KDa
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
UniProt:
  • Canonical: Q31LJ0 (Residues: 1-763; Coverage: 100%)
Gene names: Synpcc7942_2049, psaA
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I P700 chlorophyll a apoprotein A2 Chains: B, H, f
Molecule details ›
Chains: B, H, f
Length: 734 amino acids
Theoretical weight: 81.55 KDa
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
UniProt:
  • Canonical: Q31LJ1 (Residues: 1-734; Coverage: 100%)
Gene names: Synpcc7942_2048, psaB
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I iron-sulfur center Chains: C, N, g
Photosystem I reaction center subunit II Chains: D, O, h
Photosystem I reaction center subunit IV Chains: E, Q, i
Photosystem I reaction center subunit III Chains: F, R, j
Photosystem I reaction center subunit VIII Chains: I, S, k
Photosystem I reaction center subunit IX Chains: J, T, l
Photosystem I reaction center subunit PsaK Chains: K, U, m
Photosystem I reaction center subunit XI Chains: L, V, n
PsaM Chains: M, W, o
Flavodoxin Chains: P, X, p
Iron stress-induced chlorophyll-binding protein Chains: 1, 2, 3, 4, 5, 6, Y, Z, a, b, c, d, q, r, s, t, u, v

Ligands and Environments

Experiments and Validation Details

Entry percentile scores
Resolution: 3.3Å
Relevant EMDB volumes: EMD-9994
Expression system: Escherichia coli