PDBe 1q6f

X-ray diffraction
2.1Å resolution

Crystal Structure of Soybean Beta-Amylase Mutant (E178Y) with Increased pH Optimum at pH 7.1


Function and Biology Details

Reaction catalysed:
Hydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides so as to remove successive maltose units from the non-reducing ends of the chains. 
Biochemical function:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Beta-amylase Chain: A
Molecule details ›
Chain: A
Length: 495 amino acids
Theoretical weight: 56 KDa
Source organism: Glycine max
Expression system: Escherichia coli
  • Canonical: P10538 (Residues: 2-496; Coverage: 100%)
Gene name: BMY1
Sequence domains: Glycosyl hydrolase family 14
Structure domains: Glycosidases

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: MACSCIENCE
Spacegroup: P3121
Unit cell:
a: 86.818Å b: 86.818Å c: 145.24Å
α: 90° β: 90° γ: 120°
R R work R free
0.171 0.171 0.208
Expression system: Escherichia coli