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MetaCyc Reaction: 3.2.1.1

Superclasses: Reactions Classified By Conversion TypeSimple ReactionsChemical Reactions
Reactions Classified By SubstrateSmall-Molecule Reactions

EC Number: 3.2.1.1

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.

Mass balance status: Marked as unbalanced.

Enzyme Commission Primary Name: α-amylase

Enzyme Commission Synonyms: glycogenase, α amylase, α-amylase, endoamylase, Taka-amylase A, 1,4-α-D-glucan glucanohydrolase

Taxonomic Range: Archaea, Bacteria , Fungi, Viridiplantae, Metazoa

Summary:
Endohydrolysis of (1→4)-α-D-glucosidic linkages in polysaccharides containing three or more (1→4)-α-linked D-glucose units.

Acts on starch, glycogen and related polysaccharides and oligosaccharides in a random manner; reducing groups are liberated in the α-configuration. The term "α" relates to the initial anomeric configuration of the free sugar group released and not to the configuration of the linkage hydrolysed.

Enzyme Commission Summary:
The enzyme catalyzes the endohydrolysis of (1→4)-α-D-glucosidic linkages in polysaccharides containing three or more (1→4)-α-linked D-glucose units.

Acts on starch, glycogen and related polysaccharides and oligosaccharides in a random manner; reducing groups are liberated in the α-configuration. The term "α" relates to the initial anomeric configuration of the free sugar group released and not to the configuration of the linkage hydrolysed.

Citations: [Schwimmer49 , Manners62, Fischer60]

Relationship Links: BRENDA:EC:3.2.1.1, ENZYME:EC:3.2.1.1, IUBMB-ExplorEnz:EC:3.2.1.1


References

Fischer60: Fischer, E.H., Stein, E.A (1960). "α-Amylases." The Enzymes,.

Manners62: Manners, D.J. (1962). "Enzymic synthesis and degradation of starch and glycogen." Adv. Carbohydr. Chem.

Schwimmer49: Schwimmer, S., Balls, A.K. (1949). "Isolation and properties of crystalline -amylase from germinated barley." J. Biol. Chem.


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
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