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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_2_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 53135: Alpha-amylase 1

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-amylase. [EC: 3.2.1.1]
Endohydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides containing three or more (1->4)-alpha-linked D-glucose units.
  • Acts on starch, glycogen and related polysaccharides and oligosaccharides in a random manner; reducing groups are liberated in the alpha-configuration.
  • The term 'alpha' relates to the initial anomeric configuration of the free sugar group released and not to the configuration of the linkage hydrolyzed.
 2563 A0A014MRM9 A0A016T1W5 A0A016T277 A0A016T2C5 A0A021VRH4 A0A021VWY7 A0A022MLL8 A0A023E7J1 A0A023EBD9 A0A023EVZ4
(2553 more...)
1,4-alpha-glucan branching enzyme. [EC: 2.4.1.18]
Transfers a segment of a (1->4)-alpha-D-glucan chain to a primary hydroxy group in a similar glucan chain.
  • Converts amylose into amylopectin.
  • The description (official name) requires a qualification depending on the product, glycogen or amylopectin, e.g. glycogen branching enzyme, amylopectin branching enzyme.
  • The latter has frequently been termed Q-enzyme.
 79 A0A072MUF2 A0A076JLW2 A0A086ZND1 A0A087AFL6 A0A087B4A9 A0A087BGY1 A0A087BNW1 A0A087BZH9 A0A087C667 A0A087C972
(69 more...)
Pullulanase. [EC: 3.2.1.41]
Hydrolysis of (1->6)-alpha-D-glucosidic linkages in pullulan, amylopectin and glycogen, and in the alpha- and beta-limit dextrins of amylopectin and glycogen.
  • Different from EC 3.2.1.142 in its action on glycogen, and its rate of hydrolysis of limit dextrins.
  • Its action on amylopectin is complete.
  • Maltose is the smallest sugar that it can release from an alpha- (1->6)-linkage.
  • Formerly EC 3.2.1.69.
 4 A0A087EDV1 A0A174A6J8 A0A174BBN0 A0A174D1N2