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3.2.1.23: beta-galactosidase

This is an abbreviated version!
For detailed information about beta-galactosidase, go to the full flat file.

Word Map on EC 3.2.1.23

Reaction

beta-D-galactopyranosyl-(1-4)-beta-D-galactopyranosyl-(1-6)-beta-D-galactopyranosyl-(1-3)-beta-D-galactopyranose
+ 3 H2O = 4 beta-D-galactopyranose

Synonyms

Aabeta-gal, Acid beta-galactosidase, B-GAL, BbgI, BbgII, BbgIII, BbgIV, beta galactosidase, beta-D-galactohydrolase, beta-D-galactosidase, beta-D-galactoside galactohydrolase, beta-D-glactanase, beta-D-lactosidase, beta-gal, beta-Gal 1, beta-Gal 2, beta-Gal II, beta-galactosidase, beta-galactosidase I, beta-galactosidase II, beta-galactosidase III, beta-galactosidase IV, beta-galase, beta-lactosidase, betagal, betaGly4, betaGS, BGA, BgaB, BgaBM, bgaD, BgaH, BGAL, BGAL1, BGAL10, BGAL11, BGAL12, BGAL13, BGAL14, BGAL15, BGAL16, BGAL17, BGAL2, BGAL3, BGAL4, BGAL5, BGAL6, BGAL7, BGAL8, BGAL9, BgalA, BgAP, BgaS, BgaX, BGL1, BglAp, BGT I, BGT II, cold-active beta-galactosidase, CTP-beta-gal, driselase, EABase, endo-beta-galactosidase, Exo-(1-->4)-beta-D-galactanase, exo-beta-(1->3)-D-galactanase, Gal-2, Gal-5, GAL1, Gal2, Gal3, Gal4, GALA, galactanase, galactosidase, galactosidase, beta, GALB, gherkin lactase, H-BgaS, hcbetagal, Hlac_2868, Hydrolact, LacA, LACS, lactase, lactase phlorizin hydrolase, lactosylceramidase II, Lactozym, Lactozym 3000L, LPH, Maxilact, Maxilact-L/2000, MeBglD2, More, ONPGase, Oryzatym, p-nitrophenyl beta-galactosidase, PF1208, PRGH1, S 2107, SA-beta-GAL, SA-betagal, senescence-associated beta-galactosidase, SPD_0065 protein, SR12 protein, Ss beta-gal, SSO3019, SSU0587, Sumiklat, Trilactase, XC1214, XG-specific beta-galactosidase, YesZ, YH4502, ZD410

ECTree

     3 Hydrolases
         3.2 Glycosylases
             3.2.1 Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
                3.2.1.23 beta-galactosidase

Expression

Expression on EC 3.2.1.23 - beta-galactosidase

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EXPRESSION
ORGANISM
UNIPROT
LITERATURE
enzyme expression is induced by D-galactose
enzyme transcription is not induced by galactitol
expression is induced at high temperature
expression is inhibited at low temperature
expression of galA is highly induced at a low temperature and repressed at a high temperature when lactose is used as the sole carbon source
expression of isoform GAL1 is positively regulated by ethylene, and propylene treatment
expression of isoform GAL1 is suppressed by 1-methylcyclopropene treratment
expression of the lacA gene is repressed by D-glucose
glucose or glycerol, alone or in combination with galactose, gives an intermediate level of expression (6%) and peptone-containing media give very low levels (2%). The difference between the lowest and highest levels of activity is about 120fold
in human fibroblasts, the overexpression of plasma membrane associated sialidase Neu3 induces an about 2fold increase of beta-galactosidase expression and activity
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induced in the presence of xyloglucan oligosaccharides
isozyme BbgIV is induced in the presence of lactose or different galactooligosaccharide fractions
presence of ethylene has little effect on the transcription of isoform GAL2
presence of ethylene has little effect on the transcription of isoform GAL3
presence of ethylene has little effect on the transcription of isoform GAL4
strain Y187 cotransformed with pGBKLam+pGADT7-T plasmids, those harboring BK11+AD, BK51+AD, or BK92+AD plasmids show remarkably elevated beta-galactosidase activities
submerged fermentation leads to levels of 73.8 units/ml at 72 h
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the expression of SPD_0065 protein in cells grown in mucin-containing medium or tissues harvested from infected animals is significantly upregulated compared to that in pneumococci from glucose-containing medium
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