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Dunaliella Minimal Photosystem I

Electron Microscopy
3.4Å resolution
PDB entry 6yxr coloured by chain, front view.
PDB entry 6yxr coloured by chain, side view.
PDB entry 6yxr coloured by chain, top view.
Source organism: Dunaliella salina
Assembly composition:
hetero undecamer (preferred)
Entry contents: 11 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero undecamer
Accessible surface area: 98210.87 Å2
Buried surface area: 278178.6 Å2
Dissociation area: 1,343.34 Å2
Dissociation energy (ΔGdiss): 0.59 kcal/mol
Dissociation entropy (TΔSdiss): 11.44 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-111131

Macromolecules

Chlorophyll a-b binding protein, chloroplastic
Chain: 1
Length: 197 amino acids
Theoretical weight: 21.31 KDa
Source organism: Dunaliella salina
UniProt:
  • Canonical: C1K003 (Residues: 32-228; Coverage: 86%)
Gene name: Lhca2
Pfam: Chlorophyll A-B binding protein
InterPro:
Chlorophyll a-b binding protein, chloroplastic in PDB entry 6yxr, assembly 1, front view.
Chlorophyll a-b binding protein, chloroplastic in PDB entry 6yxr, assembly 1, side view.
Chlorophyll a-b binding protein, chloroplastic in PDB entry 6yxr, assembly 1, top view.
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Lhca2
Chain: 2
Length: 208 amino acids
Theoretical weight: 22.81 KDa
Source organism: Dunaliella salina
InterPro:
Lhca2 in PDB entry 6yxr, assembly 1, front view.
Lhca2 in PDB entry 6yxr, assembly 1, side view.
Lhca2 in PDB entry 6yxr, assembly 1, top view.
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Chlorophyll a-b binding protein, chloroplastic
Chain: 3
Length: 210 amino acids
Theoretical weight: 22.73 KDa
Source organism: Dunaliella salina
UniProt:
  • Canonical: C1K004 (Residues: 69-278; Coverage: 73%)
Gene name: Lhca3
Pfam: Chlorophyll A-B binding protein
InterPro:
Chlorophyll a-b binding protein, chloroplastic in PDB entry 6yxr, assembly 1, front view.
Chlorophyll a-b binding protein, chloroplastic in PDB entry 6yxr, assembly 1, side view.
Chlorophyll a-b binding protein, chloroplastic in PDB entry 6yxr, assembly 1, top view.
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Lhca4
Chain: 4
Length: 211 amino acids
Theoretical weight: 23.13 KDa
Source organism: Dunaliella salina
InterPro:
Lhca4 in PDB entry 6yxr, assembly 1, front view.
Lhca4 in PDB entry 6yxr, assembly 1, side view.
Lhca4 in PDB entry 6yxr, assembly 1, top view.
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Photosystem I P700 chlorophyll a apoprotein A1
Chain: A
Length: 739 amino acids
Theoretical weight: 81.75 KDa
Source organism: Dunaliella salina
UniProt:
  • Canonical: D0FXV2 (Residues: 13-751; Coverage: 98%)
Gene name: psaA
Pfam: Photosystem I psaA/psaB protein
InterPro:
Photosystem I P700 chlorophyll a apoprotein A1 in PDB entry 6yxr, assembly 1, front view.
Photosystem I P700 chlorophyll a apoprotein A1 in PDB entry 6yxr, assembly 1, side view.
Photosystem I P700 chlorophyll a apoprotein A1 in PDB entry 6yxr, assembly 1, top view.
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Photosystem I P700 chlorophyll a apoprotein A2
Chain: B
Length: 730 amino acids
Theoretical weight: 81.33 KDa
Source organism: Dunaliella salina
UniProt:
  • Canonical: D0FXZ0 (Residues: 6-735; Coverage: 99%)
Gene name: psaB
Pfam: Photosystem I psaA/psaB protein
InterPro:
Photosystem I P700 chlorophyll a apoprotein A2 in PDB entry 6yxr, assembly 1, front view.
Photosystem I P700 chlorophyll a apoprotein A2 in PDB entry 6yxr, assembly 1, side view.
Photosystem I P700 chlorophyll a apoprotein A2 in PDB entry 6yxr, assembly 1, top view.
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Photosystem I iron-sulfur center
Chain: C
Length: 80 amino acids
Theoretical weight: 8.72 KDa
Source organism: Dunaliella salina
UniProt:
  • Canonical: D0FXW7 (Residues: 2-81; Coverage: 99%)
Gene name: psaC
Pfam: 4Fe-4S dicluster domain
InterPro:
Photosystem I iron-sulfur center in PDB entry 6yxr, assembly 1, front view.
Photosystem I iron-sulfur center in PDB entry 6yxr, assembly 1, side view.
Photosystem I iron-sulfur center in PDB entry 6yxr, assembly 1, top view.
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PsaD
Chain: D
Length: 141 amino acids
Theoretical weight: 15.88 KDa
Source organism: Dunaliella salina
InterPro:
PsaD in PDB entry 6yxr, assembly 1, front view.
PsaD in PDB entry 6yxr, assembly 1, side view.
PsaD in PDB entry 6yxr, assembly 1, top view.
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PsaE
Chain: E
Length: 64 amino acids
Theoretical weight: 7.3 KDa
Source organism: Dunaliella salina
InterPro:
PsaE in PDB entry 6yxr, assembly 1, front view.
PsaE in PDB entry 6yxr, assembly 1, side view.
PsaE in PDB entry 6yxr, assembly 1, top view.
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PsaF
Chain: F
Length: 163 amino acids
Theoretical weight: 18.21 KDa
Source organism: Dunaliella salina
InterPro:
PsaF in PDB entry 6yxr, assembly 1, front view.
PsaF in PDB entry 6yxr, assembly 1, side view.
PsaF in PDB entry 6yxr, assembly 1, top view.
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Photosystem I reaction center subunit IX
Chain: J
Length: 40 amino acids
Theoretical weight: 4.47 KDa
Source organism: Dunaliella salina
UniProt:
  • Canonical: D0FXW0 (Residues: 1-40; Coverage: 98%)
Gene name: psaJ
Pfam: Photosystem I reaction centre subunit IX / PsaJ
InterPro:
Photosystem I reaction center subunit IX in PDB entry 6yxr, assembly 1, front view.
Photosystem I reaction center subunit IX in PDB entry 6yxr, assembly 1, side view.
Photosystem I reaction center subunit IX in PDB entry 6yxr, assembly 1, top view.
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