Enzyme Details

 EC Classification 3.2.1.23
 Enzyme name
(recommended)
beta-galactosidase
 Alternative names lactozym
trilactase
beta-D-galactoside galactohydrolase
lactase (ambiguous)
beta-lactosidase
maxilact
hydrolact
beta-D-lactosidase
S 2107
beta-D-galactanase
oryzatym
sumiklat
 Classification
Hydrolases
Glycosidases
Hydrolysing O-glycosyl compounds
 Catalyses reactions
H2O + alpha-Lactose <-> D-Glucose + D-Galactose
H2O + Galactan <-> D-Galactose + Galactan
H2O + alpha-Lactose <-> alpha-D-Glucose + D-Galactose
H2O + Lactose 6-phosphate <-> Phosphate + alpha-Lactose
H2O + beta-D-Galactosyl-1,4-beta-D-glucosylceramide <-> beta-D-Galactose + Glucosylceramide
H2O + Galactosylglycerol <-> Glycerol + Galactose
H2O + D-Galactosyl-N-acetyl-D-galactosaminyl-(N-acetylneuraminyl)-D- galactosyl-D-glucosylceramide <-> Galactose + N-Acetyl-D-galactosaminyl-(N-acetylneuraminyl)-D-galactosyl-D- glucosylceramide
H2O + 3-Ketolactose <-> beta-D-Glucose + 3-Keto-beta-D-galactose
H2O + GA1 <-> D-Galactose + GA2
H2O + p-Nitrophenyl-beta-D-galactoside <-> beta-D-Galactose + p-Nitrophenol
H2O + o-Nitrophenyl-beta-D-galactoside <-> beta-D-Galactose + o-Nitrophenol
H2O + o-Nitrophenyl beta-D-galactopyranoside 6-phosphate <-> D-Galactose 6-phosphate + o-Nitrophenol
H2O + Lactose <-> D-Glucose + D-Galactose
H2O + p-Nitrophenyl beta-D-galactopyranoside 6-phosphate <-> D-Galactose 6-phosphate + p-Nitrophenol
H2O + Phenyl-beta-D-galactopyranoside <-> beta-D-Galactose + Phenol
H2O + 3,4-Dinitrophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3,4-Dinitrophenol
H2O + m-Nitrophenyl-beta-D-galactoside <-> beta-D-Galactose + 3-Nitrophenol
H2O + 3-Methylphenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3-Cresol
H2O + 4-Bromophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 4-Bromophenol
H2O + 3,5-Dinitrophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3,5-Dinitrophenol
H2O + Pyridyl-beta-D-galactopyranoside <-> beta-D-Galactose + Pyridine
H2O + 4-Cyanophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 4-Cyanophenol
H2O + 3-Bromopyridyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3-Bromopyridine
H2O + 3-Chloropyridyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3-Chloropyridine
H2O + Isoquinyl-beta-D-galactopyranoside <-> beta-D-Galactose + Isoquinoline
H2O + 2-Naphthyl-beta-D-galactopyranoside <-> beta-D-Galactose + beta-Naphthol
H2O + 3-Methylpyridyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3-Methylpyridine
H2O + 2,4-Dinitrothiophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 2,4-Dinitrothiophenol
H2O + 2,4,6-Trinitrothiophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 2,4,6-Trinitrothiophenol
H2O + 4-Bromoisoquinyl-beta-D-galactopyranoside <-> beta-D-Galactose + 4-Bromoisoquinoline
H2O + 3,5-Dimethylpyridyl-beta-D-galactopyranoside <-> beta-D-Galactose + 3,5-Dimethylpyridine
H2O + 2-Nitrophenyl-alpha-L-arabinopyranoside <-> alpha-L-Arabinose + o-Nitrophenol
H2O + beta-1,3-Galactobiose <-> 2 beta-D-Galactose
H2O + beta-1,3-Galactotriose <-> beta-D-Galactose + beta-1,3-Galactobiose
H2O + p-Nitrophenyl-beta-D-fucopyranoside <-> beta-D-Fucose + p-Nitrophenol
H2O + 4-Nitrophenyl-alpha-L-arabinopyranoside <-> alpha-L-Arabinose + p-Nitrophenol
H2O + 4-Cyanophenyl-beta-D-galactoside <-> beta-D-Galactose + 4-Cyanophenol
H2O + Allolactose <-> D-Glucose + D-Galactose
H2O + Methyl beta-D-galactoside <-> Methanol + beta-D-Galactose
H2O + 4-Methylumbelliferyl-beta-D-galactoside <-> beta-D-Galactose + 4-Methylumbelliferone
H2O + o-Nitrophenyl-beta-D-glucopyranoside <-> beta-D-Glucose + o-Nitrophenol
H2O + p-Nitrophenyl-beta-D-glucoside <-> beta-D-Glucose + p-Nitrophenol
H2O + p-Nitrophenyl-beta-D-fucoside <-> beta-D-Fucose + p-Nitrophenol
H2O + 4-Methylumbelliferyl-beta-D-glucoside <-> beta-D-Glucose + 4-Methylumbelliferone
H2O + 2,3-Dinitrophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 2,3-Dinitrophenol
H2O + 2,5-Dinitrophenyl-beta-D-galactopyranoside <-> beta-D-Galactose + 2,5-Dinitrophenol
H2O + D-Galactosyl-N-acetyl-D-galactosaminyl-(N-acetylneuraminyl)-D- galactosyl-D-glucosylceramide <-> beta-D-Galactose + N-Acetyl-D-galactosaminyl-(N-acetylneuraminyl)-D-galactosyl-D- glucosylceramide
H2O + Lactobionic acid <-> beta-D-Galactose + D-Gluconate
H2O + Lactitol <-> beta-D-Galactose + D-Sorbitol
H2O + Lactulose <-> beta-D-Galactose + D-Fructose
H2O + Arabinogalactan <-> beta-D-Galactose + Arabinogalactan
 External links Expasy
KEGG
BRENDA
IntEnz (EBI)
IUBMB
Reactome
MetaCrop


View all entries for EC Class: 3.2.1.23



© HITS gGmbH