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Structure of substrate binding protein SiaP (A11N) in complex with Neu5Ac

X-ray diffraction
1.09Å resolution
PDB entry 2xa5 coloured by chain, front view.
PDB entry 2xa5 coloured by chain, side view.
PDB entry 2xa5 coloured by chain, top view.
Source organism: Haemophilus influenzae
Assembly composition:
monomeric (preferred)
Entry contents: 1 distinct polypeptide molecule

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Sialic acid-binding periplasmic protein SiaP
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Multimeric state: monomeric
Accessible surface area: 13354.25 Å2
Buried surface area: 676.41 Å2
Dissociation area: 338.2 Å2
Dissociation energy (ΔGdiss): 1.02 kcal/mol
Dissociation entropy (TΔSdiss): 4.01 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-155185

Macromolecules

Sialic acid-binding periplasmic protein SiaP
Chain: A
Length: 312 amino acids
Theoretical weight: 35.08 KDa
Source organism: Haemophilus influenzae
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P44542 (Residues: 24-329; Coverage: 100%)
Gene names: HI_0146, siaP
Pfam: Bacterial extracellular solute-binding protein, family 7
InterPro:
CATH: Bacterial extracellular solute-binding protein, family 7
Sialic acid-binding periplasmic protein SiaP in PDB entry 2xa5, assembly 1, front view.
Sialic acid-binding periplasmic protein SiaP in PDB entry 2xa5, assembly 1, side view.
Sialic acid-binding periplasmic protein SiaP in PDB entry 2xa5, assembly 1, top view.
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