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Literature summary for 3.2.1.21 extracted from

  • Kitpreechavanich, V.; Hayashi, M.; Nagai, S.
    Purification and characterization of extracellular beta-xylosidase and beta-glucosidase from Aspergillus fumigatus (1986), Agric. Biol. Chem., 50, 1703-1711.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
Cu2+ slight inhibition at 2 mM Aspergillus fumigatus
Fe3+ 44% inhibition at 2 mM Aspergillus fumigatus
Hg2+ 70% inhibition at 2 mM Aspergillus fumigatus
p-chloromercuribenzoic acid 33.3% inhibition at 2 mM Aspergillus fumigatus
SDS strong inhibition at 2 mM Aspergillus fumigatus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.4
-
4-nitrophenyl-beta-D-glucopyranoside
-
Aspergillus fumigatus
11.4
-
gentiobiose
-
Aspergillus fumigatus
24.8
-
cellobiose
-
Aspergillus fumigatus

Localization

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

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
95000
-
4 * 95000, SDS-PAGE Aspergillus fumigatus
380000
-
gel filtration Aspergillus fumigatus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
4-O-beta-D-glucopyranosyl-D-glucose + H2O Aspergillus fumigatus cellobiose beta-D-glucose + D-glucose
-
?
6-O-beta-D-glucopyranosyl-D-glucose + H2O Aspergillus fumigatus gentiobiose beta-D-glucose + D-glucose
-
?
xylobiose + H2O Aspergillus fumigatus
-
D-xylose + beta-D-xylose
-
?

Organism

Organism UniProt Comment Textmining
Aspergillus fumigatus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
to homogeneity, chromatography steps Aspergillus fumigatus

Source Tissue

Source Tissue Comment Organism Textmining
cell culture
-
Aspergillus fumigatus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
99.6
-
-
Aspergillus fumigatus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
(2-hydroxymethylphenyl)-beta-D-glucopyranoside + H2O low activity Aspergillus fumigatus 2-hydroxymethylphenol + beta-D-glucose
-
?
(2-hydroxymethylphenyl)-beta-D-glucopyranoside + H2O salicin Aspergillus fumigatus 2-hydroxymethylphenol + beta-D-glucose
-
?
4-nitrophenyl beta-D-galactoside + H2O low activity Aspergillus fumigatus 4-nitrophenol + beta-D-galactose
-
?
4-nitrophenyl beta-D-glucopyranoside + H2O
-
Aspergillus fumigatus 4-nitrophenol + D-glucopyranose
-
?
4-nitrophenyl beta-D-xylopyranoside + H2O low activity Aspergillus fumigatus 4-nitrophenol + beta-D-xylose
-
?
4-O-beta-D-glucopyranosyl-D-glucose + H2O cellobiose Aspergillus fumigatus beta-D-glucose + D-glucose
-
?
6-O-beta-D-glucopyranosyl-D-glucose + H2O gentiobiose Aspergillus fumigatus beta-D-glucose + D-glucose
-
?
gentiobiose + H2O
-
Aspergillus fumigatus 2 beta-D-glucose
-
?
methyl-beta-D-glucoside + H2O low activity Aspergillus fumigatus beta-D-glucose + methanol
-
?
xylobiose + H2O
-
Aspergillus fumigatus D-xylose + beta-D-xylose
-
?

Subunits

Subunits Comment Organism
tetramer 4 * 95000, SDS-PAGE Aspergillus fumigatus

Temperature Optimum [°C]

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

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
60
-
stable up to for 20 min Aspergillus fumigatus

pH Optimum

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

pH Stability

pH Stability pH Stability Maximum Comment Organism
2 8 stable within Aspergillus fumigatus