PDBe 1qsi

X-ray diffraction
1.7Å resolution

MAGNESIUM(II)-AND ZINC(II)-PROTOPORPHYRIN IX'S STABILIZE THE LOWEST OXYGEN AFFINITY STATE OF HUMAN HEMOGLOBIN EVEN MORE STRONGLY THAN DEOXYHEME

Released:

Function and Biology Details

Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Hemoglobin subunit beta Chains: B, D
Molecule details ›
Chains: B, D
Length: 146 amino acids
Theoretical weight: 15.89 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P68871 (Residues: 2-147; Coverage: 99%)
Gene name: HBB
Sequence domains: Globin
Structure domains: Globins
Hemoglobin subunit alpha Chains: A, C
Molecule details ›
Chains: A, C
Length: 141 amino acids
Theoretical weight: 15.15 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P69905 (Residues: 2-142; Coverage: 99%)
Gene names: HBA1, HBA2
Sequence domains: Globin
Structure domains: Globins

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: PHOTON FACTORY BEAMLINE BL-6A
Spacegroup: P21
Unit cell:
a: 63.15Å b: 83.59Å c: 53.8Å
α: 90° β: 99.34° γ: 90°
R-values:
R R work R free
0.186 0.186 not available