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

Source organism: Glycine max
Biochemical function: amylopectin maltohydrolase activity
Biological process: metabolic process
Cellular component: not assigned

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EC 3.2.1.2: Beta-amylase

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
Systematic name:
4-alpha-D-glucan maltohydrolase
Alternative Name(s):
  • 1,4-alpha-D-glucan maltohydrolase
  • Beta amylase
  • Beta-amylase
  • Glycogenase
  • Saccharogen amylase

GO terms

Sequence family

Pfam Protein family (Pfam)
PF01373
Domain description: Glycosyl hydrolase family 14
Occurring in:
  1. Beta-amylase
The deposited structure of PDB entry 1q6f contains 1 copy of Pfam domain PF01373 (Glycosyl hydrolase family 14) in Beta-amylase. Showing 1 copy in chain A.

InterPro InterPro annotations
IPR001554
Domain description: Glycoside hydrolase, family 14
Occurring in:
  1. Beta-amylase
IPR001371
Domain description: Glycoside hydrolase, family 14B, plant
Occurring in:
  1. Beta-amylase
IPR018238
Domain description: Glycoside hydrolase, family 14, conserved site
Occurring in:
  1. Beta-amylase
IPR017853
Domain description: Glycoside hydrolase superfamily
Occurring in:
  1. Beta-amylase

Structure domain

CATH CATH domain
3.20.20.80
Class: Alpha Beta
Architecture: Alpha-Beta Barrel
Topology: TIM Barrel
Homology: Glycosidases
Occurring in:
  1. Beta-amylase
The deposited structure of PDB entry 1q6f contains 1 copy of CATH domain 3.20.20.80 (TIM Barrel) in Beta-amylase. Showing 1 copy in chain A.
SCOP SCOP annotation
51446
Class: Alpha and beta proteins (a/b)
Fold: TIM beta/alpha-barrel
Superfamily: (Trans)glycosidases
Occurring in:
  1. Beta-amylase
The deposited structure of PDB entry 1q6f contains 1 copy of SCOP domain 51446 (Amylase, catalytic domain) in Beta-amylase. Showing 1 copy in chain A.

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