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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 the reactions of EC 3.2.1.3 glucan 1,4-α-glucosidase and, more slowly, hydrolyses (1→6)-α-D-glucose links.

The enzyme appears in viruses and cellular organisms
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
maltotetraose + 3 H2O = 4 alpha-D-glucose
show the reaction diagram
PATHWAY SOURCE
PATHWAYS
MetaCyc
glycogen degradation I, starch degradation I