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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 55: Trehalose synthase

Please note: GO 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.

There are 7 GO terms relating to "molecular function"

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.
GO Term Annotations Evidence
Maltose alpha-D-glucosyltransferase activity GO:0047471
Catalysis of the reaction: maltose = trehalose.
 14 A0R6E0 (/IDA) A0R6E0 (/IDA) A0R6E0 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA)
(4 more)
Alpha-amylase activity GO:0004556
Catalysis of the endohydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides containing three or more alpha-(1->4)-linked D-glucose units.
 11 P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS)
(1 more)
Calcium ion binding GO:0005509
Interacting selectively and non-covalently with calcium ions (Ca2+).
 11 P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS)
(1 more)
Beta-amylase activity GO:0016161
Catalysis of the reaction: (1,4-alpha-D-glucosyl)(n+1) + H2O = (1,4-alpha-D-glucosyl)(n-1) + alpha-maltose. This reaction is the hydrolysis of 1,4-alpha-glucosidic linkages in polysaccharides so as to remove successive maltose units from the non-reducing ends of the chains.
 11 P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA) P9WQ19 (/IDA)
(1 more)
Maltose alpha-D-glucosyltransferase activity GO:0047471
Catalysis of the reaction: maltose = trehalose.
 11 P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS)
(1 more)
Alpha-amylase activity GO:0004556
Catalysis of the endohydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides containing three or more alpha-(1->4)-linked D-glucose units.
 3 A0R6E0 (/IDA) A0R6E0 (/IDA) A0R6E0 (/IDA)
Calcium ion binding GO:0005509
Interacting selectively and non-covalently with calcium ions (Ca2+).
 3 A0R6E0 (/IDA) A0R6E0 (/IDA) A0R6E0 (/IDA)

There are 9 GO terms relating to "biological process"

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.
GO Term Annotations Evidence
Maltose metabolic process GO:0000023
The chemical reactions and pathways involving the disaccharide maltose (4-O-alpha-D-glucopyranosyl-D-glucopyranose), an intermediate in the catabolism of glycogen and starch.
 11 P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS)
(1 more)
Glycogen metabolic process GO:0005977
The chemical reactions and pathways involving glycogen, a polydisperse, highly branched glucan composed of chains of D-glucose residues in alpha-(1->4) glycosidic linkage, joined together by alpha-(1->6) glycosidic linkages.
 11 P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS)
(1 more)
Glycogen biosynthetic process GO:0005978
The chemical reactions and pathways resulting in the formation of glycogen, a polydisperse, highly branched glucan composed of chains of D-glucose residues.
 11 P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP)
(1 more)
Trehalose metabolic process GO:0005991
The chemical reactions and pathways involving trehalose, a disaccharide isomeric with sucrose and obtained from certain lichens and fungi.
 11 P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS) P9WQ19 (/ISS)
(1 more)
Trehalose biosynthetic process GO:0005992
The chemical reactions and pathways resulting in the formation of trehalose, a disaccharide isomeric with sucrose and obtained from certain lichens and fungi.
 11 P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP) P9WQ19 (/IMP)
(1 more)
Trehalose biosynthetic process GO:0005992
The chemical reactions and pathways resulting in the formation of trehalose, a disaccharide isomeric with sucrose and obtained from certain lichens and fungi.
 11 P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS)
(1 more)
Maltose metabolic process GO:0000023
The chemical reactions and pathways involving the disaccharide maltose (4-O-alpha-D-glucopyranosyl-D-glucopyranose), an intermediate in the catabolism of glycogen and starch.
 3 A0R6E0 (/IDA) A0R6E0 (/IDA) A0R6E0 (/IDA)
Glycogen metabolic process GO:0005977
The chemical reactions and pathways involving glycogen, a polydisperse, highly branched glucan composed of chains of D-glucose residues in alpha-(1->4) glycosidic linkage, joined together by alpha-(1->6) glycosidic linkages.
 3 A0R6E0 (/IDA) A0R6E0 (/IDA) A0R6E0 (/IDA)
Trehalose metabolic process GO:0005991
The chemical reactions and pathways involving trehalose, a disaccharide isomeric with sucrose and obtained from certain lichens and fungi.
 3 A0R6E0 (/IDA) A0R6E0 (/IDA) A0R6E0 (/IDA)

There are 2 GO terms relating to "cellular component"

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.
GO Term Annotations Evidence
Cytosol GO:0005829
The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
 11 P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS) P9WQ19 (/TAS)
(1 more)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
 11 P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA) P9WQ19 (/HDA)
(1 more)
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