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Literature summary for 3.2.1.23 extracted from

  • O'Connell, S.; Walsh, G.
    Application relevant studies of fungal beta-galactosidases with potential application in the alleviation of lactose intolerance (2008), Appl. Biochem. Biotechnol., 149, 129-138.
    View publication on PubMed

Application

Application Comment Organism
medicine enzyme may be suitable for the use as a digestive supplement for the alleviation of lactose intolerance Aspergillus carbonarius
nutrition enzyme may be suitable for the use as a digestive supplement for the alleviation of lactose intolerance Aspergillus carbonarius

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.56
-
2-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
1.16
-
4-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
1.6
-
4-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
2.63
-
2-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
83
-
lactose pH 5.5 Aspergillus carbonarius
309
-
lactose pH 5.5 Aspergillus carbonarius

Localization

Localization Comment Organism GeneOntology No. Textmining
extracellular
-
Aspergillus carbonarius
-
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
110000
-
1 * 110000, SDS-PAGE Aspergillus carbonarius
120000
-
1 * 120000, SDS-PAGE Aspergillus carbonarius
139000
-
gel filtration Aspergillus carbonarius
152000
-
gel filtration Aspergillus carbonarius

Organism

Organism UniProt Comment Textmining
Aspergillus carbonarius
-
strain ATCC6276
-
Aspergillus carbonarius ATCC 6276
-
strain ATCC6276
-

Purification (Commentary)

Purification (Comment) Organism
-
Aspergillus carbonarius

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
5.54
-
pH 5.5 Aspergillus carbonarius
11.16
-
pH 5.5 Aspergillus carbonarius

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2-nitrophenyl beta-D-galactopyranoside + H2O
-
Aspergillus carbonarius 2-nitrophenol + D-galactose
-
?
2-nitrophenyl beta-D-galactopyranoside + H2O
-
Aspergillus carbonarius ATCC 6276 2-nitrophenol + D-galactose
-
?
4-nitrophenyl beta-D-galactopyranoside + H2O
-
Aspergillus carbonarius 4-nitrophenol + beta-D-galactose
-
?
4-nitrophenyl beta-D-galactopyranoside + H2O
-
Aspergillus carbonarius ATCC 6276 4-nitrophenol + beta-D-galactose
-
?
4-nitrophenyl beta-D-galactopyranoside + H2O
-
Aspergillus carbonarius 4-nitrophenol + D-galactose
-
?
4-nitrophenyl beta-D-galactopyranoside + H2O
-
Aspergillus carbonarius ATCC 6276 4-nitrophenol + D-galactose
-
?
lactose + H2O
-
Aspergillus carbonarius D-galactose + D-glucose
-
?
lactose + H2O
-
Aspergillus carbonarius ATCC 6276 D-galactose + D-glucose
-
?

Subunits

Subunits Comment Organism
monomer 1 * 110000, SDS-PAGE Aspergillus carbonarius
monomer 1 * 120000, SDS-PAGE Aspergillus carbonarius

Synonyms

Synonyms Comment Organism
beta-Gal 1
-
Aspergillus carbonarius
beta-Gal 2
-
Aspergillus carbonarius

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
55
-
-
Aspergillus carbonarius
65
-
-
Aspergillus carbonarius

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
13
-
lactose pH 5.5 Aspergillus carbonarius
55
-
lactose pH 5.5 Aspergillus carbonarius
96
-
2-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
440
-
2-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
15750
-
4-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius
74000
-
4-nitrophenyl-beta-D-galactopyranoside pH 5.5 Aspergillus carbonarius

pH Stability

pH Stability pH Stability Maximum Comment Organism
2
-
2 h, presence of pepsin, 70% residual activity Aspergillus carbonarius
2
-
2 h, presence of pepsin, 80% residual activity Aspergillus carbonarius

pI Value

Organism Comment pI Value Maximum pI Value
Aspergillus carbonarius
-
-
4.1