PDBe 4j9t

X-ray diffraction
1.4Å resolution

Crystal structure of a putative, de novo designed unnatural amino acid dependent metalloprotein, northeast structural genomics consortium target OR61


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
Sialidase Chain: A
Molecule details ›
Chain: A
Length: 363 amino acids
Theoretical weight: 38.55 KDa
Source organism: Micromonospora viridifaciens
Expression system: Escherichia coli BL21(DE3)
  • Canonical: Q02834 (Residues: 47-407; Coverage: 59%)
Gene name: nedA
Sequence domains: BNR repeat-like domain
Structure domains: Neuraminidase

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X4C
Spacegroup: P212121
Unit cell:
a: 46.163Å b: 79.677Å c: 83.777Å
α: 90° β: 90° γ: 90°
R R work R free
0.139 0.135 0.166
Expression system: Escherichia coli BL21(DE3)