PDBe 1yq4

X-ray diffraction
2.33Å resolution

Avian respiratory complex ii with 3-nitropropionate and ubiquinone


Function and Biology Details

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Entry contents:
4 distinct polypeptide molecules
Macromolecules (4 distinct):
Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial Chain: B
Molecule details ›
Chain: B
Length: 252 amino acids
Theoretical weight: 28.69 KDa
Source organism: Gallus gallus
  • Canonical: Q9YHT2 (Residues: 39-290; Coverage: 87%)
Gene name: SDHB
Sequence domains:
Structure domains:
Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial Chain: A
Succinate dehydrogenase cytochrome b, large subunit Chain: C
Molecule details ›
Chain: C
Length: 141 amino acids
Theoretical weight: 15.43 KDa
Source organism: Gallus gallus
  • Canonical: D0VWW3 (Residues: 1-139; Coverage: 99%)
Sequence domains: Succinate dehydrogenase/Fumarate reductase transmembrane subunit
Structure domains:
Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial Chain: D
Molecule details ›
Chain: D
Length: 103 amino acids
Theoretical weight: 10.97 KDa
Source organism: Gallus gallus
  • Canonical: Q5ZIS0 (Residues: 55-157; Coverage: 66%)
Gene names: RCJMB04_23p7, SDHD
Structure domains: Fumarate reductase/succinate dehydrogenase, transmembrane subunit

Ligands and Environments

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 5.0.3
Spacegroup: P212121
Unit cell:
a: 69.586Å b: 83.487Å c: 288.59Å
α: 90° β: 90° γ: 90°
R R work R free
0.202 0.202 0.252