PDBe 1wcq

X-ray diffraction
2.1Å resolution

Mutagenesis of the Nucleophilic Tyrosine in a Bacterial Sialidase to Phenylalanine.


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. 
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Sialidase Chains: A, B, C
Molecule details ›
Chains: A, B, C
Length: 601 amino acids
Theoretical weight: 64.28 KDa
Source organism: Micromonospora viridifaciens
Expression system: Escherichia coli BL21(DE3)
  • Canonical: Q02834 (Residues: 47-647; Coverage: 99%)
Gene name: nedA
Sequence domains:
Structure domains:

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID14-2
Spacegroup: P3221
Unit cell:
a: 143.258Å b: 143.258Å c: 160.25Å
α: 90° β: 90° γ: 120°
R R work R free
0.178 0.175 0.238
Expression system: Escherichia coli BL21(DE3)