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Literature summary for 3.2.1.23 extracted from

  • Gatt, S.
    beta-Galactosidase from rat brain (1969), Methods Enzymol., 14, 156-161.
No PubMed abstract available

Activating Compound

Activating Compound Comment Organism Structure
sodium cholate required for hydrolysis of lipid substrates Rattus norvegicus
taurocholate required for hydrolysis of lipid substrates Rattus norvegicus

Inhibitors

Inhibitors Comment Organism Structure
ceramide hydrolysis of lactosyl ceramide Rattus norvegicus
D-galactono-1,4-lactone hydrolysis of lactosyl ceramide and p-nitrophenyl galactoside Rattus norvegicus
sphingosine hydrolysis of lactosyl ceramide Rattus norvegicus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.02
-
lactosyldiceramide
-
Rattus norvegicus
0.1
-
tetrahexosyldiceramide
-
Rattus norvegicus
0.3
-
monosialoganglioside
-
Rattus norvegicus

Organism

Organism UniProt Comment Textmining
Rattus norvegicus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Rattus norvegicus

Source Tissue

Source Tissue Comment Organism Textmining
brain
-
Rattus norvegicus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
11.83
-
-
Rattus norvegicus

Storage Stability

Storage Stability Organism
-20°C, stable for at least 6 months Rattus norvegicus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
digalactosyl ceramide + H2O
-
Rattus norvegicus ?
-
?
lactose + H2O
-
Rattus norvegicus D-glucose + D-galactose
-
?
lactosyl ceramide + H2O
-
Rattus norvegicus ?
-
?
lactosyldiceramide
-
Rattus norvegicus ?
-
?
monosialoganglioside + H2O
-
Rattus norvegicus ?
-
?
o-nitrophenyl-beta-D-galactoside + H2O
-
Rattus norvegicus o-nitrophenol + beta-D-galactose
-
?
p-nitrophenyl-beta-D-galactoside + H2O
-
Rattus norvegicus p-nitrophenol + beta-D-galactose
-
?
tetrahexosyl ceramide + H2O
-
Rattus norvegicus ?
-
?
tetrahexosyldiceramide
-
Rattus norvegicus ?
-
?
trihexosyl ceramide + H2O
-
Rattus norvegicus ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
3.1
-
hydrolysis of p-nitrophenyl galactoside Rattus norvegicus
5
-
hydrolysis of lactosyl ceramide Rattus norvegicus