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Literature summary for 3.2.1.23 extracted from

  • Goulas, T.; Goulas, A.; Tzortzis, G.; Gibson, G.R.
    Expression of four beta-galactosidases from Bifidobacterium bifidum NCIMB41171 and their contribution on the hydrolysis and synthesis of galactooligosaccharides (2009), Appl. Microbiol. Biotechnol., 84, 899-907.
    View publication on PubMed

Organism

Organism UniProt Comment Textmining
Bifidobacterium bifidum
-
-
-
Bifidobacterium bifidum NCIMB41171
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Bifidobacterium bifidum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2-nitrophenyl beta-D-galactopyranoside + H2O
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Bifidobacterium bifidum 2-nitrophenol + beta-D-galactose
-
?
2-nitrophenyl beta-D-galactopyranoside + H2O
-
Bifidobacterium bifidum NCIMB41171 2-nitrophenol + beta-D-galactose
-
?
beta-D-(1-6) galactobiose + H2O isozymes BbgI, BbgIV, and BbgIII showe minor activity towards beta-D-(1-6) galactobiose (less than 4.7%) in comparison to lactose, whereas isozyme BbgII has a more than 22fold preference for that substrate Bifidobacterium bifidum ?
-
?
beta-D-(1-6) galactobiose + H2O isozymes BbgI, BbgIV, and BbgIII showe minor activity towards beta-D-(1-6) galactobiose (less than 4.7%) in comparison to lactose, whereas isozyme BbgII has a more than 22fold preference for that substrate Bifidobacterium bifidum NCIMB41171 ?
-
?
lactose + H2O
-
Bifidobacterium bifidum D-galactose + D-glucose
-
?
lactose + H2O
-
Bifidobacterium bifidum NCIMB41171 D-galactose + D-glucose
-
?

Synonyms

Synonyms Comment Organism
BbgI isozyme Bifidobacterium bifidum
BbgII isozyme Bifidobacterium bifidum
BbgIII isozyme Bifidobacterium bifidum
BbgIV isozyme Bifidobacterium bifidum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.8
-
isozyme BbgII Bifidobacterium bifidum
6.4
-
isozyme BbgI and isozyme BgbIV Bifidobacterium bifidum
6.8
-
isozyme BbgIII Bifidobacterium bifidum

Expression

Organism Comment Expression
Bifidobacterium bifidum isozyme BbgIV is induced in the presence of lactose or different galactooligosaccharide fractions up