› 6tcl

Electron Microscopy
3.2Å resolution

Photosystem I tetramer

Released:
DOI: 10.2210/pdb6tcl/pdb
PDB entry 6tcl coloured by chain, front view.
PDB entry 6tcl coloured by chain, side view.
PDB entry 6tcl coloured by chain, top view.
Source organism: Nostoc sp. PCC 7120 = FACHB-418
Primary publication:
Distinct structural modulation of photosystem I and lipid environment stabilizes its tetrameric assembly.
Chen M, Perez-Boerema A, Zhang L, Li Y, Yang M, Li S, Amunts A
Nat Plants 6 314-320 (2020)
PMID: 32170279
Related structures: EMD-10461

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 48-mer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-141245 (preferred)
Entry contents:
18 distinct polypeptide molecules
Macromolecules (18 distinct):
Photosystem I P700 chlorophyll a apoprotein A1 Chains: A, A1, A2, AA
Molecule details ›
Chains: A, A1, A2, AA
Length: 740 amino acids
Theoretical weight: 81.93 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58576 (Residues: 12-751; Coverage: 98%)
Gene names: alr5154, psaA
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I P700 chlorophyll a apoprotein A2 1 Chains: B, B1, B2, BB
Molecule details ›
Chains: B, B1, B2, BB
Length: 739 amino acids
Theoretical weight: 83.25 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58565 (Residues: 3-741; Coverage: 100%)
Gene names: alr5155, psaB1
Sequence domains: Photosystem I psaA/psaB protein
Photosystem I iron-sulfur center Chains: C, C1, C2, CC
Molecule details ›
Chains: C, C1, C2, CC
Length: 80 amino acids
Theoretical weight: 8.69 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P0A410 (Residues: 2-81; Coverage: 99%)
Gene names: asr3463, psaC
Sequence domains: 4Fe-4S dicluster domain
Photosystem I reaction center subunit II Chains: D, D1, D2, DD
Molecule details ›
Chains: D, D1, D2, DD
Length: 134 amino acids
Theoretical weight: 14.67 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58573 (Residues: 5-138; Coverage: 96%)
Gene names: all0329, psaD
Sequence domains: PsaD
Photosystem I reaction center subunit IV Chains: E1, E2
Molecule details ›
Chains: E1, E2
Length: 60 amino acids
Theoretical weight: 6.81 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58575 (Residues: 2-61; Coverage: 86%)
Gene names: asr4319, psaE
Sequence domains: Photosystem I reaction centre subunit IV / PsaE
Photosystem I reaction center subunit III Chains: F, F1, FF
Molecule details ›
Chains: F, F1, FF
Length: 139 amino acids
Theoretical weight: 15.03 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58564 (Residues: 25-163; Coverage: 99%)
Gene names: all0109, psaF
Sequence domains: Photosystem I reaction centre subunit III
Photosystem I reaction center subunit VIII Chains: I, I1, II
Molecule details ›
Chains: I, I1, II
Length: 31 amino acids
Theoretical weight: 3.55 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58560 (Residues: 13-43; Coverage: 67%)
Gene names: asl3849, psaI
Sequence domains: Photosystem I reaction centre subunit VIII
Photosystem I reaction center subunit IX Chains: J, J1, J2, JJ
Molecule details ›
Chains: J, J1, J2, JJ
Length: 48 amino acids
Theoretical weight: 5.37 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58568 (Residues: 2-49; Coverage: 98%)
Gene names: asl0108, psaJ
Sequence domains: Photosystem I reaction centre subunit IX / PsaJ
Photosystem I reaction center subunit PsaK 1 Chains: K, K1, KK
Molecule details ›
Chains: K, K1, KK
Length: 74 amino acids
Theoretical weight: 7.58 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58583 (Residues: 9-82; Coverage: 86%)
Gene names: asr4775, psaK1
Sequence domains: Photosystem I psaG / psaK
Photosystem I reaction center subunit XI Chain: L1
Molecule details ›
Chain: L1
Length: 166 amino acids
Theoretical weight: 17.55 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58577 (Residues: 2-167; Coverage: 97%)
Gene names: all0107, psaL
Sequence domains: Photosystem I reaction centre subunit XI
Photosystem I reaction center subunit XII Chains: M, M1, M2, MM
Molecule details ›
Chains: M, M1, M2, MM
Length: 31 amino acids
Theoretical weight: 3.41 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: Q8YNB0 (Residues: 2-32; Coverage: 97%)
Gene names: asr4657, psaM
Sequence domains: Photosystem I protein M (PsaM)
Photosystem I 4.8 kDa protein Chains: X, X1, X2, XX
Molecule details ›
Chains: X, X1, X2, XX
Length: 39 amino acids
Theoretical weight: 4.34 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58566 (Residues: 5-43; Coverage: 89%)
Gene names: asr1283, psaX
Sequence domains: PsaX family
Photosystem I reaction center subunit III Chain: F2
Molecule details ›
Chain: F2
Length: 137 amino acids
Theoretical weight: 14.85 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58564 (Residues: 25-161; Coverage: 97%)
Gene names: all0109, psaF
Sequence domains: Photosystem I reaction centre subunit III
Photosystem I reaction center subunit VIII Chain: I2
Molecule details ›
Chain: I2
Length: 33 amino acids
Theoretical weight: 3.76 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58560 (Residues: 13-45; Coverage: 72%)
Gene names: asl3849, psaI
Sequence domains: Photosystem I reaction centre subunit VIII
Photosystem I reaction center subunit PsaK 1 Chain: K2
Molecule details ›
Chain: K2
Length: 73 amino acids
Theoretical weight: 7.51 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58583 (Residues: 10-82; Coverage: 85%)
Gene names: asr4775, psaK1
Sequence domains: Photosystem I psaG / psaK
Photosystem I reaction center subunit XI Chain: L2
Molecule details ›
Chain: L2
Length: 167 amino acids
Theoretical weight: 17.67 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58577 (Residues: 2-168; Coverage: 97%)
Gene names: all0107, psaL
Sequence domains: Photosystem I reaction centre subunit XI
Photosystem I reaction center subunit IV Chains: E, EE
Molecule details ›
Chains: E, EE
Length: 63 amino acids
Theoretical weight: 7.11 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58575 (Residues: 2-64; Coverage: 90%)
Gene names: asr4319, psaE
Sequence domains: Photosystem I reaction centre subunit IV / PsaE
Photosystem I reaction center subunit XI Chains: L, LL
Molecule details ›
Chains: L, LL
Length: 154 amino acids
Theoretical weight: 16.29 KDa
Source organism: Nostoc sp. PCC 7120 = FACHB-418
UniProt:
  • Canonical: P58577 (Residues: 17-170; Coverage: 90%)
Gene names: all0107, psaL
Sequence domains: Photosystem I reaction centre subunit XI

Ligands and Environments

10 bound ligands:
Ligand CLA 378 x CLA
Ligand CL0 4 x CL0
Ligand PQN 8 x PQN
Ligand LHG 24 x LHG
Ligand BCR 94 x BCR
Ligand AJP 22 x AJP
Ligand LMG 30 x LMG
Ligand ECH 4 x ECH
Ligand SF4 12 x SF4
Ligand DGD 2 x DGD
No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 3.2Å
Relevant EMDB volumes: EMD-10461

Quick links

Citations

1 review citation

Structural Diversity of Photosystem I and Its Light-Harvesting System in Eukaryotic Algae and Plants.
Bai et al. (2021)
12 other articles

5 mentions without citation

Diversity Among Cyanobacterial Photosystem I Oligomers.
Chen et al. (2021)
4 more