The Enzyme Database

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Accepted name: β-galactosidase
Reaction: Hydrolysis of terminal non-reducing β-D-galactose residues in β-D-galactosides
Other name(s): lactase (ambiguous); β-lactosidase; maxilact; hydrolact; β-D-lactosidase; S 2107; lactozym; trilactase; β-D-galactanase; oryzatym; sumiklat
Systematic name: β-D-galactoside galactohydrolase
Comments: Some enzymes in this group hydrolyse α-L-arabinosides; some animal enzymes also hydrolyse β-D-fucosides and β-D-glucosides; cf. EC lactase.
Links to other databases: BRENDA, EXPASY, GTD, KEGG, MetaCyc, PDB, CAS registry number: 9031-11-2
1.  Blakely, J.A. and MacKenzie, S.L. Purification and properties of a β-hexosidase from Sporobolomyces singularis. Can. J. Biochem. 47 (1969) 1021–1025. [PMID: 5389663]
2.  Kuby, S.A. and Lardy, H.A. Purification and kinetics of β-D-galactosidase from Escherichia coli, strain K-12. J. Am. Chem. Soc. 75 (1953) 890–896.
3.  Kuo, C.H. and Wells, W.W. 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 (1978) 3550–3556. [PMID: 418065]
4.  Landman, O.E. Properties and induction of β-galactosidase in Bacillus megaterium. Biochim. Biophys. Acta 23 (1957) 558–569. [PMID: 13426167]
5.  Llanillo, M., Perez, N. and Cabezas, J.A. β-Galactosidase and β-glucosidase activities of the same enzyme from rabbit liver. Int. J. Biochem. 8 (1977) 557–564.
6.  Monod, J. and Cohn, M. La biosynthèse induite des enzymes (adaptation enzymatique). Adv. Enzymol. Relat. Subj. Biochem. 13 (1952) 67–119. [PMID: 14943665]
7.  Wallenfels, K. and Malhotra, O.P. In: Boyer, P.D., Lardy, H. and Myrbäck, K. (Ed.), The Enzymes, 2nd edn, vol. 4, Academic Press, New York, 1960, pp. 409–430.
8.  Asp, N.G., Dahlqvist, A. and Koldovský, O. Human small-intestinal β-galactosidases. Separation and characterization of one lactase and one hetero β-galactosidase. Biochem. J. 114 (1969) 351–359. [PMID: 5822067]
[EC created 1961, modified 1980]

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