X-ray diffraction
2Å resolution

Crystal Structure of the Active Site Mutant Glu328Gln of Amylosucrase from Neisseria polysaccharea in Complex with the Natural Substrate Sucrose


Function and Biology Details

Reaction catalysed:
Sucrose + ((1->4)-alpha-D-glucosyl)(n) = D-fructose + ((1->4)-alpha-D-glucosyl)(n+1)

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecules (2 distinct):
Amylosucrase Chain: A
Molecule details ›
Chain: A
Length: 628 amino acids
Theoretical weight: 71.59 KDa
Source organism: Neisseria polysaccharea
Expression system: Escherichia coli
  • Canonical: Q9ZEU2 (Residues: 13-636; Coverage: 98%)
Gene name: ams
Sequence domains: Alpha amylase, catalytic domain
Structure domains:

Ligands and Environments

Carbohydrate polymer : NEW Components: GLC, FRU
No bound ligands
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: MAX II BEAMLINE I711
Spacegroup: P21212
Unit cell:
a: 95.588Å b: 116.739Å c: 60.833Å
α: 90° β: 90° γ: 90°
R R work R free
0.186 0.186 0.226
Expression system: Escherichia coli