Structure analysis

Heptameric core complex structure of C4b-binding (C4BP) protein from human

X-ray diffraction
2.8Å resolution
Source organism: Homo sapiens
Assembly composition:
homo heptamer (preferred)
Entry contents: 1 distinct polypeptide molecule

Assemblies

Assembly 1 (preferred)
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Multimeric state: homo heptamer
Accessible surface area: 21499.73 Å2
Buried surface area: 15383.73 Å2
Dissociation area: 7,582.06 Å2
Dissociation energy (ΔGdiss): 124.3 kcal/mol
Dissociation entropy (TΔSdiss): 67.89 kcal/mol
Symmetry number: 7
PDBe Complex ID: PDB-CPX-137316

Macromolecules

Chains: A, B, C, D, E, F, G
Length: 65 amino acids
Theoretical weight: 7.39 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P04003 (Residues: 540-597; Coverage: 11%)
Gene names: C4BP, C4BPA
Pfam: Oligomerization domain of C4b-binding protein alpha
InterPro: C4b-binding protein alpha, oligomerization domain
CATH: Single alpha-helices involved in coiled-coils or other helix-helix interfaces

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