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Intersubunit Interactions Associated with Tyr42alpha Stabilize the Quaternary-T Tetramer but are not Major Quaternary Constraints in Deoxyhemoglobin: alphaY42A deoxyhemoglobin no-salt

X-ray diffraction
2Å resolution
PDB entry 1xz4 coloured by chain, front view.
PDB entry 1xz4 coloured by chain, side view.
PDB entry 1xz4 coloured by chain, top view.
Source organism: Homo sapiens
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 HbA complex
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Multimeric state: hetero tetramer
Accessible surface area: 23754.62 Å2
Buried surface area: 11170.91 Å2
Dissociation area: 3,243.57 Å2
Dissociation energy (ΔGdiss): 2.18 kcal/mol
Dissociation entropy (TΔSdiss): 36.72 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-159519
Complex Portal ID: CPX-2158

Macromolecules

Hemoglobin subunit alpha
Chains: A, C
Length: 141 amino acids
Theoretical weight: 15.09 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P69905 (Residues: 2-142; Coverage: 99%)
Gene names: HBA1, HBA2
Pfam: Globin
InterPro:
CATH: Globins
SCOP: Globins
Hemoglobin subunit alpha in PDB entry 1xz4, assembly 1, front view.
Hemoglobin subunit alpha in PDB entry 1xz4, assembly 1, side view.
Hemoglobin subunit alpha in PDB entry 1xz4, assembly 1, top view.
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Hemoglobin subunit beta
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
Pfam: Globin
InterPro:
CATH: Globins
SCOP: Globins
Hemoglobin subunit beta in PDB entry 1xz4, assembly 1, front view.
Hemoglobin subunit beta in PDB entry 1xz4, assembly 1, side view.
Hemoglobin subunit beta in PDB entry 1xz4, assembly 1, top view.
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