MetaCyc Reaction:

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

EC Number:

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: limit dextrinase

Enzyme Commission Synonyms: R-enzyme, amylopectin-1,6-glucosidase, dextrin α-1,6-glucanohydrolase

Taxonomic Range: Viridiplantae

Enzyme Commission Summary:
This enzyme catalyzes hydrolysis of (1->6)-α-D-glucosidic linkages in α- and β-limit dextrins of amylopectin and glycogen, and in amylopectin and pullulan.

The enzymes, which were characterized from plants, have little or no action on glycogen. Action on amylopectin is incomplete, but action on α-limit dextrins is complete.

Maltose is the smallest sugar that the enzyme can release from an α-(1->6)-linkage.

Citations: [Gordon75, Manners97]

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


Gordon75: Gordon, R.W, Manners, D.J., Stark, J.R. (1975). "The limit dextrinase of the broad bean (Vicia faba)." Carbohydr. Res.

Manners97: Manners, D.J. (1997). "Observations on the specificity and nomenclature of starch debranching enzymes." J. Appl. Glycosci.

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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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