Beta-galactosidase. This group of beta-galactosidase enzymes belong to the glycosyl hydrolase 42 family. The enzyme catalyzes the hydrolysis of terminal, non-reducing terminal beta-D-galactosidase residues.

Beta-galactosidase GanA [Carbohydrate transport and metabolism].

Beta-galactosidase trimerisation domain. This is non catalytic domain B of beta-galactosidase enzymes belong to the glycosyl hydrolase 42 family. This domain is related to glutamine amidotransferase enzymes, but the catalytic residues are replaced by non functional amino acids. This domain is involved in trimerisation.

A4 beta-galactosidase middle domain: a type 1 glutamine amidotransferase (GATase1)-like domain. A4 beta-galactosidase middle domain: a type 1 glutamine amidotransferase (GATase1)-like domain. This group includes proteins similar to beta-galactosidase from Thermus thermophilus. Beta-Galactosidase hydrolyzes the beta-1,4-D-galactosidic linkage of lactose, as well as those of related chromogens, o-nitrophenyl-beta-D-galactopyranoside (ONP-Gal) and 5-bromo-4-chloro-3-indolyl-beta-D-galactoside (X-gal). This A4 beta-galactosidase middle domain lacks the catalytic triad of typical GATase1 domains. The reactive Cys residue found in the sharp turn between a beta strand and an alpha helix termed the nucleophile elbow in typical GATase1 domains is not conserved in this group.

Beta-galactosidase C-terminal domain. This domain is found at the C-terminus of beta-galactosidase enzymes that belong to the glycosyl hydrolase 42 family.

PolyextremophilicBeta-galactosidase from the Antarctic haloarchaeon Halorubrum lacusprofundi [Halorubrum lacusprofundi ATCC 49239]

3Dstructure of Gan42B, a GH42 beta-galactosidase from G. [Geobacillus stearothermophilus],4OIF_B 3D structure of Gan42B, a GH42 beta-galactosidase from G. [Geobacillus stearothermophilus],4OIF_C 3D structure of Gan42B, a GH42 beta-galactosidase from G. [Geobacillus stearothermophilus]

3Dstructure of the E323A catalytic mutant of Gan42B, a GH42 beta-galactosidase from G. stearothermophilus [Geobacillus stearothermophilus],4OJY_B 3D structure of the E323A catalytic mutant of Gan42B, a GH42 beta-galactosidase from G. stearothermophilus [Geobacillus stearothermophilus],4OJY_C 3D structure of the E323A catalytic mutant of Gan42B, a GH42 beta-galactosidase from G. stearothermophilus [Geobacillus stearothermophilus]

3Dstructure of the E323A catalytic mutant of Gan42B, a GH42 beta-galactosidase from G. stearothermophilus [Geobacillus stearothermophilus],5DFA_B 3D structure of the E323A catalytic mutant of Gan42B, a GH42 beta-galactosidase from G. stearothermophilus [Geobacillus stearothermophilus],5DFA_C 3D structure of the E323A catalytic mutant of Gan42B, a GH42 beta-galactosidase from G. stearothermophilus [Geobacillus stearothermophilus]

beta-(1,6)-galactosidasefrom Bifidobacterium animalis subsp. lactis Bl-04 in complex with galactose [Bifidobacterium animalis subsp. lactis Bl-04],4UNI_B beta-(1,6)-galactosidase from Bifidobacterium animalis subsp. lactis Bl-04 in complex with galactose [Bifidobacterium animalis subsp. lactis Bl-04],4UNI_C beta-(1,6)-galactosidase from Bifidobacterium animalis subsp. lactis Bl-04 in complex with galactose [Bifidobacterium animalis subsp. lactis Bl-04]

Beta-galactosidase YesZ OS=Bacillus licheniformis (strain ATCC 14580 / DSM 13 / JCM 2505 / CCUG 7422 / NBRC 12200 / NCIMB 9375 / NCTC 10341 / NRRL NRS-1264 / Gibson 46) OX=279010 GN=yesZ PE=3 SV=2

Beta-galactosidase YesZ OS=Bacillus subtilis (strain 168) OX=224308 GN=yesZ PE=1 SV=1

Beta-galactosidase BgaB OS=Geobacillus sp. (strain Y412MC61) OX=544556 GN=bgaB PE=3 SV=1

Beta-galactosidase bgaB OS=Geobacillus kaustophilus OX=1462 GN=bgaB PE=1 SV=1

Beta-galactosidase BgaA OS=Clostridium cellulovorans (strain ATCC 35296 / DSM 3052 / OCM 3 / 743B) OX=573061 GN=bgaA PE=1 SV=1