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Information on EC 3.2.1.20 - alpha-glucosidase

for references in articles please use BRENDA:EC3.2.1.20

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IUBMB Comments

This single entry covers a group of enzymes whose specificity is directed mainly towards the exohydrolysis of (1→4)-α-glucosidic linkages, and that hydrolyse oligosaccharides rapidly, relative to polysaccharide, which are hydrolysed relatively slowly, or not at all. The intestinal enzyme also hydrolyses polysaccharides, catalysing a reaction similar to EC 3.2.1.3, glucan 1,4-α-glucosidase, but releasing α- rather than β-glucose residues. The enzyme can also hydrolyse (1→6)-α-D-glucose links, but more slowly.

The expected taxonomic range for this enzyme is: Eukaryota, Bacteria, Archaea
Reaction Schemes
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maltotetraose
+
3
H2O
=
4
alpha-D-glucose
+
3
=
4

Synonyms
alpha-glucosidase, maltase, neutral alpha-glucosidase, alpha-d-glucosidase, alglucosidase alfa, intestinal maltase, intestinal alpha-glucosidase, alpha-1,4-glucosidase, recombinant human gaa, alpha-glucosidase ii, more

REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
Hydrolysis of terminal, non-reducing (1->4)-linked alpha-D-glucose residues with release of D-glucose
show the reaction diagram
PATHWAY SOURCE
PATHWAYS
MetaCyc
glycogen degradation I, starch degradation I
Highest Expressing Human Cell Lines
Cell Line Links Gene Links