8ovc

Electron Microscopy
2.8Å resolution

Respiratory supercomplex (III2-IV2) from Mycobacterium smegmatis

Released:

Function and Biology Details

Reactions catalysed:
Quinol + 2 ferricytochrome c(Side 2) = quinone + 2 ferrocytochrome c(Side 2) + 2 H(+)(Side 2)
4 ferrocytochrome c + O(2) + 8 H(+)(Side 1) = 4 ferricytochrome c + 4 H(2)O(Side 2)
2 superoxide + 2 H(+) = O(2) + H(2)O(2)
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero 28-mer (preferred)
PDBe Complex ID:
PDB-CPX-269170 (preferred)
Entry contents:
14 distinct polypeptide molecules
Macromolecules (14 distinct):
Cytochrome bc1 complex cytochrome c subunit Chains: C, O
Molecule details ›
Chains: C, O
Length: 278 amino acids
Theoretical weight: 29.11 KDa
Source organism: Mycolicibacterium smegmatis
Expression system: Mycolicibacterium smegmatis
UniProt:
  • Canonical: A0R050 (Residues: 1-268; Coverage: 100%)
Gene name: MSMEG_4261
Sequence domains:
Cytochrome bc1 complex Rieske iron-sulfur subunit Chains: G, M
Molecule details ›
Chains: G, M
Length: 408 amino acids
Theoretical weight: 44.87 KDa
Source organism: Mycolicibacterium smegmatis
Expression system: Mycolicibacterium smegmatis
UniProt:
  • Canonical: A0R051 (Residues: 1-408; Coverage: 100%)
Gene name: MSMEG_4262
Sequence domains:
Cytochrome bc1 complex cytochrome b subunit Chains: H, N
Transmembrane protein Chains: I, P
Probable cytochrome c oxidase subunit 3 Chains: J, S
Cytochrome c oxidase polypeptide 4 Chains: K, T
Cytochrome c oxidase subunit 1 Chains: L, R
cytochrome-c oxidase Chains: Q, X
Cytochrome c oxidase subunit Chains: U, Z
Uncharacterized protein MSMEG_4692/MSMEI_4575 Chains: V, a
LpqE protein Chains: W, b
Superoxide dismutase [Cu-Zn] Chains: Y, c
Co-purified unknown peptide Chains: E, f
Co-purified unknown peptide Chains: F, e

Ligands and Environments

Experiments and Validation Details

Entry percentile scores
Resolution: 2.8Å
Relevant EMDB volumes: EMD-17210
Expression system: Mycolicibacterium smegmatis