PDBe 1rpk

X-ray diffraction
2Å resolution

Crystal structure of barley alpha-amylase isozyme 1 (amy1) in complex with acarbose

Source organism: Hordeum vulgare
Primary publication:
Oligosaccharide binding to barley alpha-amylase 1.
J. Biol. Chem. 280 32968-78 (2005)
PMID: 16030022

Function and Biology Details

Reaction catalysed:
Endohydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides containing three or more (1->4)-alpha-linked D-glucose units. 
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Alpha-amylase type A isozyme Chain: A
Molecule details ›
Chain: A
Length: 405 amino acids
Theoretical weight: 44.64 KDa
Source organism: Hordeum vulgare
Expression system: Komagataella pastoris
  • Canonical: P00693 (Residues: 25-429; Coverage: 98%)
Gene name: AMY1.1
Sequence domains:
Structure domains:

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ENRAF-NONIUS FR591
Spacegroup: P21212
Unit cell:
a: 93.39Å b: 72.92Å c: 61.39Å
α: 90° β: 90° γ: 90°
R R work R free
0.18 0.18 0.231
Expression system: Komagataella pastoris