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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 571: Oligosaccharide 4-alpha-D-glucosyltransferase

There are 1 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
Oligosaccharide 4-alpha-D-glucosyltransferase. [EC: 2.4.1.161]
Transfers the non-reducing terminal alpha-D-glucose residue from a (1->4)-alpha-D-glucan to the 4-position of a free glucose or of a glucosyl residue at the non-reducing terminus of a (1->4)-alpha-D-glucan, thus bringing about the rearrangement of oligosaccharides.
  • The enzyme acts on amylose, amylopectin, glycogen and maltooligosaccharides.
  • No detectable free glucose is formed, indicating the enzyme does not act as a hydrolase.
  • The enzyme from the bacterium Cellvibrio japonicus has the highest activity with maltotriose as a donor, and also accepts maltose, while the enzyme from amoeba does not accept maltose.
  • Oligosaccharides with 1->6 linkages cannot function as donors, but can act as acceptors.
  • Unlike EC 2.4.1.25, this enzyme can transfer only a single glucosyl residue.
 1 B3PEE6
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