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Structure of Greyhound Hemoglobin: Origin of High Oxygen Affinity

X-ray diffraction
1.9Å resolution
PDB entry 3pel coloured by chain, front view.
PDB entry 3pel coloured by chain, side view.
PDB entry 3pel coloured by chain, top view.
Source organism: Canis lupus familiaris
Assembly composition:
hetero tetramer (preferred)
Entry contents: 2 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Hemoglobin complex
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Multimeric state: hetero tetramer
Accessible surface area: 24163.17 Å2
Buried surface area: 11023.44 Å2
Dissociation area: 1,428.55 Å2
Dissociation energy (ΔGdiss): -1.62 kcal/mol
Dissociation entropy (TΔSdiss): 13.67 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-158039

Macromolecules

Hemoglobin subunit alpha
Chain: A
Length: 141 amino acids
Theoretical weight: 15.24 KDa
Source organism: Canis lupus familiaris
UniProt:
  • Canonical: P60529 (Residues: 1-141; Coverage: 100%)
Gene name: HBA
Pfam: Globin
InterPro:
CATH: Globins
Hemoglobin subunit alpha in PDB entry 3pel, assembly 1, front view.
Hemoglobin subunit alpha in PDB entry 3pel, assembly 1, side view.
Hemoglobin subunit alpha in PDB entry 3pel, assembly 1, top view.
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Hemoglobin subunit beta
Chain: B
Length: 146 amino acids
Theoretical weight: 16.02 KDa
Source organism: Canis lupus familiaris
UniProt:
  • Canonical: P60524 (Residues: 1-146; Coverage: 100%)
Gene name: HBB
Pfam: Globin
InterPro:
CATH: Globins
Hemoglobin subunit beta in PDB entry 3pel, assembly 1, front view.
Hemoglobin subunit beta in PDB entry 3pel, assembly 1, side view.
Hemoglobin subunit beta in PDB entry 3pel, assembly 1, top view.
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