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Literature summary for 3.2.1.139 extracted from

  • Kiryu, T.; Nakano, H.; Kiso, T.; Murakami, H.
    Purification and characterization of a novel alpha-glucuronidase from Aspergillus niger specific for O-alpha-D-glucosyluronic acid alpha-D-glucosiduronic acid (2005), Biosci. Biotechnol. Biochem., 69, 522-529.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
Fe2+ 2 mM, weak inhibition Aspergillus niger
Fe3+ 2 mM, weak inhibition Aspergillus niger
Hg2+ 2 mM, 58% inhibition Aspergillus niger
Mn2+ 2 mM, weak inhibition Aspergillus niger
SDS 2 mM, 48% inhibition Aspergillus niger

Metals/Ions

Metals/Ions Comment Organism Structure
Ag+ 2 mM, slight activation Aspergillus niger
Ca2+ 2 mM, slight activation Aspergillus niger
Cu2+ 2 mM, slight activation Aspergillus niger
K+ 2 mM, slight activation Aspergillus niger
Mg2+ 2 mM, slight activation Aspergillus niger
Na+ 2 mM, slight activation Aspergillus niger

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
58000
-
2 * 58000, SDS-PAGE Aspergillus niger
120000
-
gel filtration Aspergillus niger

Organism

Organism UniProt Comment Textmining
Aspergillus niger
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Aspergillus niger

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Aspergillus niger

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information no hydrolysis of O-alpha-D-glucosyluronic acid alpha-D-glucoside, O-alpha-D-glucosyluronic acid beta-D-glucosiduronic acid, O-alpha-D-glucosyluronic acid-(1,2)-beta-D-fructosiduronic acid, p-nitrophenyl-O-alpha-D-glucosiduronic acid, methyl-O-alpha-D-glucosiduronic acid, or 6-O-alpha-(4-O-alpha-D-glucosyluronic acid)-D-glucosyl-beta-cyclodextrine Aspergillus niger ?
-
?
O-alpha-D-glucosyluronic acid alpha-D-glucosiduronic acid + H2O
-
Aspergillus niger alpha-D-glucosiduronic acid + beta-D-glucosiduronic acid alpha-D-glucosiduronic acid and beta-D-glucosiduronic acid are produced in an equimolar ratio ?

Subunits

Subunits Comment Organism
dimer 2 * 58000, SDS-PAGE Aspergillus niger

Synonyms

Synonyms Comment Organism
TrDCase
-
Aspergillus niger

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
40
-
-
Aspergillus niger

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
20 60 20°C: about 35% of maximal activity, 60°C: about 60% of maximal activity Aspergillus niger

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
30
-
pH 4.0, 24 h, stable below Aspergillus niger

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
3 3.5
-
Aspergillus niger

pH Stability

pH Stability pH Stability Maximum Comment Organism
2 4.5 30°C, stable Aspergillus niger