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Literature summary for 3.1.1.20 extracted from

  • Ramirez-Coronel, M.A.; Viniegra-Gonzalez, G.; Darvill, A.; Augur, C.
    A novel tannase from Aspergillus niger with beta-glucosidase activity (2003), Microbiology, 149, 2941-2946.
    View publication on PubMed

Localization

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

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
90000
-
x * 90000, SDS-PAGE, x * 180000, SDS-PAGE Aspergillus niger
180000
-
x * 90000, SDS-PAGE, x * 180000, SDS-PAGE Aspergillus niger

Organism

Organism UniProt Comment Textmining
Aspergillus niger
-
IRDUAM collection strain No. Aa20
-

Purification (Commentary)

Purification (Comment) Organism
to homogeneity from culture supernatant 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
0.18
-
purified enzyme, substrate catechin gallate Aspergillus niger
0.43
-
purified enzyme, substrate epicatechin gallate Aspergillus niger
0.64
-
purified enzyme, substrate epigallocatechin gallate Aspergillus niger
0.84
-
purified enzyme, substrate tannic acid Aspergillus niger
0.87
-
purified enzyme, substrate gallic acid methyl ester Aspergillus niger
1.13
-
purified enzyme, substrate gallocatechin gallate Aspergillus niger

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
catechin gallate + H2O
-
Aspergillus niger gallic acid + catechin
-
?
cellobiose + H2O beta-glucosidase activity of the enzyme, only observed in absence of tannic acid Aspergillus niger 2 D-glucose
-
?
epicatechin gallate + H2O
-
Aspergillus niger gallic acid + epicatechin
-
?
epigallocatechin gallate + H2O
-
Aspergillus niger gallic acid + epigallocatechin
-
?
gallic acid methyl ester + H2O
-
Aspergillus niger gallic acid + methanol
-
?
gallocatechin gallate + H2O best substrate Aspergillus niger gallic acid + gallocatechin
-
?
additional information the enzyme removes gallic acid non-specifically from both condensed and hydrolysable tannins Aspergillus niger ?
-
?
tannic acid + H2O
-
Aspergillus niger 10 gallate + D-glucose
-
?

Subunits

Subunits Comment Organism
? x * 90000, SDS-PAGE, x * 180000, SDS-PAGE Aspergillus niger

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
60 70
-
Aspergillus niger

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 90 markedly reduced activity above 70°C Aspergillus niger

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6
-
-
Aspergillus niger

pH Range

pH Minimum pH Maximum Comment Organism
3.5 7
-
Aspergillus niger

pI Value

Organism Comment pI Value Maximum pI Value
Aspergillus niger isoelectric focusing
-
3.8