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Literature summary for 3.2.1.20 extracted from

  • Chen, D.L.; Tong, X.; Chen, S.W.; Chen, S.; Wu, D.; Fang, S.G.; Wu, J.; Chen, J.
    Heterologous expression and biochemical characterization of alpha-glucosidase from Aspergillus niger by Pichia pastroris (2010), J. Agric. Food Chem., 58, 4819-4824.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
expression in Pichia pastoris Aspergillus niger

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.446
-
p-nitrophenyl-alpha-D-glucopyranoside
-
Aspergillus niger

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
106000
-
SDS-PAGE, after deglycosylation Aspergillus niger
145000
-
SDS-PAGE Aspergillus niger

Organism

Organism UniProt Comment Textmining
Aspergillus niger A2QJF7
-
-

Purification (Commentary)

Purification (Comment) Organism
ultrafiltration, ethanol fraction and hydrophobic interaction chromatography Aspergillus niger

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
2.52
-
-
Aspergillus niger

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4-nitrophenyl alpha-D-glucopyranoside + H2O assay at pH 5.5, 50°C, reaction terminated by sodium carbonate solution Aspergillus niger 4-nitrophenol + D-glucose
-
?

Synonyms

Synonyms Comment Organism
alpha-glucosidase
-
Aspergillus niger

Temperature Optimum [°C]

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

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 60
-
Aspergillus niger

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
50
-
50% remaining activity after 72 h at 50°C, 50% remaining activity after 3 h at 60°C Aspergillus niger

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.5
-
-
Aspergillus niger

pH Range

pH Minimum pH Maximum Comment Organism
3 7
-
Aspergillus niger