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Cryo-EM structure of E. coli cytochrome bo3 quinol oxidase assembled in peptidiscs

Electron Microscopy
2.8Å resolution
PDB entry 8qqk coloured by chain, front view.
PDB entry 8qqk coloured by chain, side view.
PDB entry 8qqk coloured by chain, top view.
Source organism: Escherichia coli BL21(DE3)
Assembly composition:
hetero tetramer (preferred)
Entry contents: 4 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Cytochrome bo3 ubiquinol oxidase complex
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Multimeric state: hetero tetramer
Accessible surface area: 43570.43 Å2
Buried surface area: 22295.82 Å2
Dissociation area: 2,914.24 Å2
Dissociation energy (ΔGdiss): 64.2 kcal/mol
Dissociation entropy (TΔSdiss): 13.12 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-142171
Complex Portal ID: CPX-2102

Macromolecules

Cytochrome bo(3) ubiquinol oxidase subunit 1
Chain: A
Length: 663 amino acids
Theoretical weight: 74.42 KDa
Source organism: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0ABI8 (Residues: 1-663; Coverage: 100%)
Gene names: JW0421, b0431, cyoB
Pfam: Cytochrome C and Quinol oxidase polypeptide I
Cytochrome bo(3) ubiquinol oxidase subunit 1 in PDB entry 8qqk, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 1 in PDB entry 8qqk, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 1 in PDB entry 8qqk, assembly 1, top view.
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Cytochrome bo(3) ubiquinol oxidase subunit 2
Chain: B
Length: 315 amino acids
Theoretical weight: 34.95 KDa
Source organism: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0ABJ1 (Residues: 1-315; Coverage: 100%)
Gene names: JW0422, b0432, cyoA
Pfam:
Cytochrome bo(3) ubiquinol oxidase subunit 2 in PDB entry 8qqk, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 2 in PDB entry 8qqk, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 2 in PDB entry 8qqk, assembly 1, top view.
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Cytochrome bo(3) ubiquinol oxidase subunit 3
Chain: C
Length: 204 amino acids
Theoretical weight: 22.64 KDa
Source organism: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0ABJ3 (Residues: 1-204; Coverage: 100%)
Gene names: JW0420, b0430, cyoC
Pfam: Cytochrome c oxidase subunit III
Cytochrome bo(3) ubiquinol oxidase subunit 3 in PDB entry 8qqk, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 3 in PDB entry 8qqk, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 3 in PDB entry 8qqk, assembly 1, top view.
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Cytochrome bo(3) ubiquinol oxidase subunit 4
Chain: D
Length: 109 amino acids
Theoretical weight: 12.04 KDa
Source organism: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0ABJ6 (Residues: 1-109; Coverage: 100%)
Gene names: JW0419, b0429, cyoD
Pfam: Prokaryotic Cytochrome C oxidase subunit IV
Cytochrome bo(3) ubiquinol oxidase subunit 4 in PDB entry 8qqk, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 4 in PDB entry 8qqk, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 4 in PDB entry 8qqk, assembly 1, top view.
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