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The structure of ubiquinol oxidase from Escherichia coli

X-ray diffraction
3.5Å resolution
PDB entry 1fft coloured by chain, front view.
PDB entry 1fft coloured by chain, side view.
PDB entry 1fft coloured by chain, top view.
Source organism: Escherichia coli
Assembly composition:
hetero tetramer (preferred)
Entry contents: 4 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero tetramer
Accessible surface area: 43469.02 Å2
Buried surface area: 15286.24 Å2
Dissociation area: 1,369.02 Å2
Dissociation energy (ΔGdiss): 17.66 kcal/mol
Dissociation entropy (TΔSdiss): 13.9 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-142172
Assembly 2
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Multimeric state: hetero tetramer
Accessible surface area: 42926.29 Å2
Buried surface area: 15844.72 Å2
Dissociation area: 1,415.81 Å2
Dissociation energy (ΔGdiss): 18.69 kcal/mol
Dissociation entropy (TΔSdiss): 13.9 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-142172

Macromolecules

Cytochrome bo(3) ubiquinol oxidase subunit 1
Chains: A, F
Length: 663 amino acids
Theoretical weight: 74.42 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
UniProt:
  • Canonical: P0ABI8 (Residues: 1-663; Coverage: 100%)
Gene names: JW0421, b0431, cyoB
Pfam: Cytochrome C and Quinol oxidase polypeptide I
InterPro:
CATH: Cytochrome c oxidase-like, subunit I domain
SCOP: Cytochrome c oxidase subunit I-like
Cytochrome bo(3) ubiquinol oxidase subunit 1 in PDB entry 1fft, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 1 in PDB entry 1fft, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 1 in PDB entry 1fft, assembly 1, top view.
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Cytochrome bo(3) ubiquinol oxidase subunit 2
Chains: B, G
Length: 315 amino acids
Theoretical weight: 34.95 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
UniProt:
  • Canonical: P0ABJ1 (Residues: 1-315; Coverage: 100%)
Gene names: JW0422, b0432, cyoA
Pfam:
InterPro:
CATH:
SCOP:
Cytochrome bo(3) ubiquinol oxidase subunit 2 in PDB entry 1fft, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 2 in PDB entry 1fft, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 2 in PDB entry 1fft, assembly 1, top view.
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Cytochrome bo(3) ubiquinol oxidase subunit 3
Chains: C, H
Length: 204 amino acids
Theoretical weight: 22.64 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
UniProt:
  • Canonical: P0ABJ3 (Residues: 24-204; Coverage: 89%)
Gene names: JW0420, b0430, cyoC
Pfam: Cytochrome c oxidase subunit III
InterPro:
CATH: Cytochrome c oxidase, subunit III, four-helix bundle
SCOP: Cytochrome c oxidase subunit III-like
Cytochrome bo(3) ubiquinol oxidase subunit 3 in PDB entry 1fft, assembly 1, front view.
Cytochrome bo(3) ubiquinol oxidase subunit 3 in PDB entry 1fft, assembly 1, side view.
Cytochrome bo(3) ubiquinol oxidase subunit 3 in PDB entry 1fft, assembly 1, top view.
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UBIQUINOL OXIDASE
Chains: D, I
Length: 109 amino acids
Theoretical weight: 9.29 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
UBIQUINOL OXIDASE in PDB entry 1fft, assembly 1, front view.
UBIQUINOL OXIDASE in PDB entry 1fft, assembly 1, side view.
UBIQUINOL OXIDASE in PDB entry 1fft, assembly 1, top view.
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