Structure analysis

Structure of the T. brucei haptoglobin-haemoglobin receptor bound to human haptolgobin-haemoglobin

X-ray diffraction
2.9Å resolution
Assembly composition:
hetero tetramer (preferred)
Entry contents: 4 distinct polypeptide molecules

Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero tetramer
Accessible surface area: 33857.79 Å2
Buried surface area: 9782.46 Å2
Dissociation area: 1,289.43 Å2
Dissociation energy (ΔGdiss): 6.46 kcal/mol
Dissociation entropy (TΔSdiss): 13.92 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-133189

Macromolecules

Chain: A
Length: 141 amino acids
Theoretical weight: 15.15 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: P69905 (Residues: 2-142; Coverage: 99%)
Gene names: HBA1, HBA2
Pfam: Globin
InterPro:
CATH: Globins

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Chain: B
Length: 141 amino acids
Theoretical weight: 15.22 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: P68871 (Residues: 3-143; Coverage: 96%)
Gene name: HBB
Pfam: Globin
InterPro:
CATH: Globins

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Chain: C
Length: 259 amino acids
Theoretical weight: 28.79 KDa
Source organism: Homo sapiens
Expression system: Spodoptera frugiperda
UniProt:
  • Canonical: P00738 (Residues: 148-406; Coverage: 67%)
Gene name: HP
Pfam: Trypsin
InterPro:

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Chain: D
Length: 260 amino acids
Theoretical weight: 27.93 KDa
Source organism: Trypanosoma brucei brucei
Expression system: Escherichia coli
UniProt:
  • Canonical: Q581F2 (Residues: 38-297; Coverage: 71%)
Gene names: Tb06.28F21.220, Tb927.6.440
Pfam: Haptoglobin-hemoglobin receptor
CATH: Ferritin

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