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CATH Superfamily 3.20.20.80

Glycosidases

The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Glycosidases
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 138: Putative alpha-glucosidase AgdA

There are 3 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Alpha-glucosidase. [EC: 3.2.1.20]
Hydrolysis of terminal, non-reducing (1->4)-linked alpha-D-glucose residues with release of alpha-D-glucose.
  • Group of enzymes whose specificity is directed mainly toward the exohydrolysis of 1,4-alpha-glucosidic linkages, and that hydrolyze oligosaccharides rapidly, relative to polysaccharides, which are hydrolyzed relatively slowly, or not at all.
  • The intestinal enzyme also hydrolyzes polysaccharides, catalyzing the reactions of EC 3.2.1.3, and, more slowly, hydrolyzes 1,6-alpha-D- glucose links.
 6 A0A1S9DLL7 A0A1S9DLL7 Q12558 Q12558 Q5AWI5 Q9C0Y4
Glucan 1,4-alpha-glucosidase. [EC: 3.2.1.3]
Hydrolysis of terminal (1->4)-linked alpha-D-glucose residues successively from non-reducing ends of the chains with release of beta-D- glucose.
  • Most forms of the enzyme can rapidly hydrolyze 1,6-alpha-D-glucosidic bonds when the next bond in the sequence is 1,4, and some preparations of this enzyme hydrolyze 1,6- and 1,3-alpha-D-glucosidic bonds in other polysaccharides.
  • This entry covers all such enzymes acting on polysaccharides more rapidly than on oligosaccharides.
  • EC 3.2.1.20 from mammalian intestine can catalyze similar reactions.
 1 O74254
Beta-glucosidase. [EC: 3.2.1.21]
Hydrolysis of terminal, non-reducing beta-D-glucosyl residues with release of beta-D-glucose.
  • Wide specificity for beta-D-glucosides.
  • Some examples also hydrolyze one or more of the following: beta-D- galactosides, alpha-L-arabinosides, beta-D-xylosides and beta-D- fucosides.
 1 Q5AWI5
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