Enzyme Details

EC Classification

3.2.1.20

Enzyme name
(recommended)

alpha-glucosidase

Alternative names

alpha-D-glucoside glucohydrolase
maltase
glucoinvertase
glucosidosucrase
maltase-glucoamylase
alpha-glucopyranosidase
glucosidoinvertase
alpha-D-glucosidase
alpha-glucoside hydrolase
alpha-1,4-glucosidase

Classification

Hydrolases

Glycosidases

Hydrolysing O-glycosyl compounds

Catalyses reactions

H2O + Maltose <-> 2 alpha-D-Glucose

H2O + Sucrose <-> D-Glucose + D-Fructose

H2O + Sucrose <-> alpha-D-Glucose + beta-D-Fructose

H2O + Melibiose <-> D-Glucose + D-Galactose

H2O + Isomaltose <-> 2 alpha-D-Glucose

H2O + Starch <-> alpha-D-Glucose + Starch

H2O + alpha,alpha-Trehalose <-> 2 D-Glucose

H2O + Maltotriose <-> alpha-D-Glucose + Maltose

H2O + alpha-Methyl-D-glucopyranoside <-> Methanol + alpha-D-Glucose

H2O + p-Nitrophenyl-alpha-D-glucoside <-> alpha-D-Glucose + p-Nitrophenol

H2O + Maltohexaose <-> beta-D-Glucose + Maltopentaose

H2O + Maltopentaose <-> beta-D-Glucose + Maltotetraose

H2O + Maltotetraose <-> beta-D-Glucose + Maltotriose

H2O + Maltoheptaose <-> beta-D-Glucose + Maltohexaose

H2O + Isomaltotriose <-> alpha-D-Glucose + Isomaltose

H2O + Panose <-> alpha-D-Glucose + Maltose

Maltose + 2 L-Ascorbate <-> 2 H2O + 2 2-O-alpha-D-Glucopyranosyl-L-ascorbic acid

H2O + 2-O-alpha-D-Glucopyranosyl-L-ascorbic acid <-> alpha-D-Glucose + L-Ascorbate

H2O + Nigerose <-> 2 D-Glucose

H2O + Maltotetraose <-> alpha-D-Glucose + Maltotriose

H2O + Turanose <-> alpha-D-Glucose + D-Fructose

H2O + Palatinose <-> alpha-D-Glucose + D-Fructose

H2O + Maltopentaose <-> alpha-D-Glucose + Maltotetraose

H2O + 2-O-beta-D-Glucopyranosyl-beta-D-glucopyranose <-> 2 beta-D-Glucose

H2O + Nigerose <-> 2 alpha-D-Glucose

H2O + Kojibiose <-> 2 alpha-D-Glucose

H2O + alpha,alpha-Trehalose <-> 2 alpha-D-Glucose

H2O + Maltohexaose <-> alpha-D-Glucose + Maltopentaose

H2O + Maltoheptaose <-> alpha-D-Glucose + Maltohexaose

H2O + Phenyl alpha-D-glucoside <-> alpha-D-Glucose + Phenol

H2O + Phenyl alpha-D-maltoside <-> Maltose + Phenol

H2O + p-Nitrophenyl-alpha-D-galactoside <-> alpha-D-Galactose + p-Nitrophenol

H2O + p-Nitrophenol alpha-D-glucopyranoside <-> alpha-D-Glucose + p-Nitrophenol

H2O + Maltitol <-> alpha-D-Glucose + D-Sorbitol

H2O + Trehalulose <-> alpha-D-Glucose + beta-D-Fructose

H2O + Maltulose <-> alpha-D-Glucose + D-Fructose

H2O + Leucrose <-> alpha-D-Glucose + D-Fructose

External links

Expasy
KEGG
BRENDA
IntEnz (EBI)
IUBMB
Reactome
MetaCrop

View all entries for EC Class: 3.2.1.20