PDBe 1nej

X-ray diffraction
2.1Å resolution

Crystalline Human Carbonmonoxy Hemoglobin S (Liganded Sickle Cell Hemoglobin) Exhibits The R2 Quaternary State At Neutral pH In The Presence Of Polyethylene Glycol: The 2.1 Angstrom Resolution Crystal Structure

Source organism: Homo sapiens
Primary publication:
COHbC and COHbS crystallize in the R2 quaternary state at neutral pH in the presence of PEG 4000.
Acta Crystallogr. D Biol. Crystallogr. 61 566-73 (2005)
PMID: 15858266

Function and Biology Details

Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

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: 15.86 KDa
Source organism: Homo sapiens
  • Best match: P68871 (Residues: 2-147)
Gene name: HBB
Hemoglobin subunit alpha Chains: A, C
Molecule details ›
Chains: A, C
Length: 141 amino acids
Theoretical weight: 15.15 KDa
Source organism: Homo sapiens
  • Best match: P69905 (Residues: 2-142)
Gene names: HBA1, HBA2

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU
Spacegroup: P212121
Unit cell:
a: 58Å b: 58.53Å c: 171.84Å
α: 90° β: 90° γ: 90°
R R work R free
0.235 0.235 0.268