PDBe 2bf6

X-ray diffraction
0.97Å resolution

Atomic Resolution Structure of the bacterial sialidase NanI from Clostridium perfringens in complex with alpha-Sialic Acid (Neu5Ac).


Function and Biology Details

Reaction catalysed:
Hydrolysis of alpha-(2->3)-, alpha-(2->6)-, alpha-(2->8)- glycosidic linkages of terminal sialic acid residues in oligosaccharides, glycoproteins, glycolipids, colominic acid and synthetic substrates. 
Biochemical function:
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Exo-alpha-sialidase Chain: A
Molecule details ›
Chain: A
Length: 449 amino acids
Theoretical weight: 50.09 KDa
Source organism: Clostridium perfringens
Expression system: Escherichia coli
  • Canonical: Q59310 (Residues: 243-691; Coverage: 65%)
Gene name: nanH
Sequence domains: BNR repeat-like domain
Structure domains: Neuraminidase

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID14-1
Spacegroup: P212121
Unit cell:
a: 96.981Å b: 69.413Å c: 72.694Å
α: 90° β: 90° γ: 90°
R R work R free
0.113 not available 0.133
Expression system: Escherichia coli