EC 3 - Hydrolases
EC 3.2 - Glycosylases
EC 3.2.1 - Glycosidases, i.e. enzymes hydrolyzing O- and S-glycosyl compounds
EC 3.2.1.23 - β-galactosidase
IntEnz view
ENZYME view
IntEnz Enzyme Nomenclature
EC 3.2.1.23
Names
Accepted name:
β-galactosidase
Other
names:
β-D-galactanase
β-D-lactosidase
β-lactosidase
S 2107
hydrolact
lactase
lactozym
maxilact
oryzatym
sumiklat
trilactase
exo-(1→4)-β-D-galactanase
β-D-lactosidase
β-lactosidase
S 2107
hydrolact
lactase
lactozym
maxilact
oryzatym
sumiklat
trilactase
exo-(1→4)-β-D-galactanase
Systematic name:
β-D-galactoside galactohydrolase
Reaction
- Hydrolysis of terminal non-reducing beta-D-galactose residues in beta-D-galactosides
Comments:
Some enzymes in this group hydrolyse α-L-arabinosides; some animal enzymes also hydrolyse β-D-fucosides and β-D-glucosides; cf. EC 3.2.1.108 lactase.
Links to other databases
Enzymes and pathways:
NC-IUBMB
,
BRENDA
,
ExplorEnz
,
ENZYME@ExPASy
,
KEGG
,
MetaCyc
,
NIST 74
,
UniPathway
Gene Ontology:
GO:0004565
CAS Registry Number:
9031-11-2
References
-
Purification and properties of a β-hexosidase from Sporobolomyces singularis.Can. J. Biochem. 47 : 1021-1025 (1969). [PMID: 5389663]
-
Purification and kinetics of β-D-galactosidase from Escherichia coli, strain K-12.J. Am. Chem. Soc. 75 : 890-896 (1953).
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β-Galactosidase from rat mammary gland. Its purification, properties, and role in the biosynthesis of 6β-O-D-galactopyranosyl myo-inositol.J. Biol. Chem. 253 : 3550-3556 (1978). [PMID: 418065]
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Properties and induction of β-galactosidase in Bacillus megaterium.Biochim. Biophys. Acta 23 : 558-569 (1957). [PMID: 13426167]
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β-Galactosidase and β-glucosidase activities of the same enzyme from rabbit liver.Int. J. Biochem. 8 : 557-564 (1977).
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La biosynthèse induite des enzymes (adaptation enzymatique).Adv. Enzymol. Relat. Subj. Biochem. 13 : 67-119 (1952). [PMID: 14943665]
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β-GalactosidaseIn: Boyer, P.D., Lardy, H. and Myrbäck, K. (Eds.) The Enzymes , 2nd ed. vol. 4 , Academic Press , New York , 1960 , 409-430
-
Human small-intestinal β-galactosidases. Separation and characterization of one lactase and one hetero β-galactosidase.Biochem. J. 114 : 351-359 (1969). [PMID: 5822067]
[EC 3.2.1.23 created 1961, modified 1980]