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Literature summary for 3.2.1.23 extracted from

  • Ohtsuka, K.; Tanoh, A.; Ozawa, O.; Kanematsu, T.; Uchida, T.; Shinke, R.
    Purification and properties of a beta-galactosidase with high galactosyl transfer activity from Cryptococcus laurentii OKN-4 (1990), J. Ferment. Bioeng., 70, 301-307.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
2-mercaptoethanol
-
Papiliotrema laurentii
Ag+
-
Papiliotrema laurentii
D-glucose
-
Papiliotrema laurentii
Hg2+
-
Papiliotrema laurentii
maltose
-
Papiliotrema laurentii
maltotriose
-
Papiliotrema laurentii

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
11.4
-
lactose
-
Papiliotrema laurentii
18.2
-
o-nitrophenyl-beta-D-galactoside
-
Papiliotrema laurentii

Localization

Localization Comment Organism GeneOntology No. Textmining
cell wall
-
Papiliotrema laurentii 5618
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
100000
-
2 * 100000, SDS-PAGE Papiliotrema laurentii
200000
-
gel filtration Papiliotrema laurentii

Organism

Organism UniProt Comment Textmining
Papiliotrema laurentii
-
-
-
Papiliotrema laurentii OKN-4
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Papiliotrema laurentii

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
12.3
-
-
Papiliotrema laurentii

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
cellobiose + H2O
-
Papiliotrema laurentii 2 D-glucose
-
?
cellobiose + H2O
-
Papiliotrema laurentii OKN-4 2 D-glucose
-
?
lactitol + H2O
-
Papiliotrema laurentii D-galactose + D-glucitol
-
?
lactose transgalactosylation Papiliotrema laurentii additional information O-beta-D-galactopyranosyl-(1, 4)-o-beta-D-galactopyranosyl-(1, 4)-D-glucopyranose + lactose + galactodisaccharides + galactotrisaccharides + galactotetrasaccharides ?
lactose + H2O
-
Papiliotrema laurentii D-glucose + D-galactose
-
?
lactose + H2O
-
Papiliotrema laurentii OKN-4 D-glucose + D-galactose
-
?
lactulose + H2O
-
Papiliotrema laurentii D-galactose + D-fructose
-
?
lactulose + H2O
-
Papiliotrema laurentii OKN-4 D-galactose + D-fructose
-
?
o-nitrophenyl-beta-D-galactoside + H2O
-
Papiliotrema laurentii o-nitrophenol + beta-D-galactose
-
?
o-nitrophenyl-beta-D-galactoside + H2O
-
Papiliotrema laurentii OKN-4 o-nitrophenol + beta-D-galactose
-
?
p-nitrophenyl-beta-D-galactoside + H2O
-
Papiliotrema laurentii p-nitrophenol + beta-D-galactose
-
?
p-nitrophenyl-beta-D-galactoside + H2O
-
Papiliotrema laurentii OKN-4 p-nitrophenol + beta-D-galactose
-
?

Subunits

Subunits Comment Organism
dimer 2 * 100000, SDS-PAGE Papiliotrema laurentii

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
60
-
-
Papiliotrema laurentii

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
40 65 40°C: about 30% of maximal activity, 65°C: about 15% of maximal activity Papiliotrema laurentii

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
58
-
10 min, stable up to Papiliotrema laurentii
65
-
10 min, complete loss of activity Papiliotrema laurentii

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.3
-
-
Papiliotrema laurentii

pH Range

pH Minimum pH Maximum Comment Organism
2.3 6 pH 2.3: about 30% of maximal activity, pH 6.0: about 50% of maximal activity Papiliotrema laurentii

pH Stability

pH Stability pH Stability Maximum Comment Organism
2.9 9.3 30°C, 60 min, stable Papiliotrema laurentii