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Literature summary extracted from

  • Kumar, S.; Ramon, D.
    Purification and regulation of the synthesis of a beta-xylosidse from Aspergillus nidulans (1996), FEMS Microbiol. Lett., 135, 287-293.
No PubMed abstract available

Activating Compound

EC Number Activating Compound Comment Organism Structure
3.2.1.37 cysteine 30% stimulation Aspergillus nidulans
3.2.1.37 dithiothreitol 30% stimulation Aspergillus nidulans
3.2.1.37 EDTA 30% stimulation Aspergillus nidulans

General Stability

EC Number General Stability Organism
3.2.1.37 at optimal temperature inactivated within 4-6 h Aspergillus nidulans

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.2.1.37 Ag+ strong inhibition Aspergillus nidulans
3.2.1.37 Cu2+ strong inhibition Aspergillus nidulans
3.2.1.37 Fe2+ some inhibition Aspergillus nidulans
3.2.1.37 Hg2+ strong inhibition Aspergillus nidulans
3.2.1.37 SDS some inhibition Aspergillus nidulans
3.2.1.37 Zn2+ some inhibition Aspergillus nidulans

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.2.1.37 1.1
-
p-nitrophenyl beta-D-xylopyranoside
-
Aspergillus nidulans

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
3.2.1.37 cell bound
-
Aspergillus nidulans
-
-

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
3.2.1.37 Ca2+ slight stimulation Aspergillus nidulans
3.2.1.37 Co2+ slightly stimulating Aspergillus nidulans
3.2.1.37 Mg2+ slight stimulation Aspergillus nidulans

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
3.2.1.37 180000
-
gel filtration Aspergillus nidulans

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
3.2.1.37 xylo-oligosaccharides + H2O Aspergillus nidulans derived from xylan beta-D-xylose + ?
-
?
3.2.1.37 xylobiose + H2O Aspergillus nidulans 90% degradation within 6 to 9 h beta-D-xylose + D-xylose
-
?

Organism

EC Number Organism UniProt Comment Textmining
3.2.1.37 Aspergillus nidulans
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.2.1.37 to homogeneity, 3step chromatography techniques Aspergillus nidulans

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.2.1.37 mycelium greatest level of enzyme in arabinose or xylose media Aspergillus nidulans
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
3.2.1.37 107.1
-
-
Aspergillus nidulans

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.1.37 p-nitrophenyl beta-D-xylopyranoside + H2O
-
Aspergillus nidulans p-nitrophenol + beta-D-xylopyranose
-
?
3.2.1.37 xylo-oligosaccharides + H2O derived from xylan Aspergillus nidulans beta-D-xylose + ?
-
?
3.2.1.37 xylobiose + H2O 90% degradation within 6 to 9 h Aspergillus nidulans beta-D-xylose + D-xylose
-
?
3.2.1.37 xylotetraose + H2O 20-30% degradation after 16 h Aspergillus nidulans xylotriose + beta-D-xylose
-
?
3.2.1.37 xylotriose + H2O 70-80% degradation after 16 h Aspergillus nidulans beta-D-xylose + xylobiose
-
?

Subunits

EC Number Subunits Comment Organism
3.2.1.37 dimer 2 * 85000-95000, SDS-PAGE Aspergillus nidulans

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
3.2.1.37 50
-
-
Aspergillus nidulans

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
3.2.1.37 40 45 stable up to 8 h, quite unstable above Aspergillus nidulans

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.2.1.37 5
-
-
Aspergillus nidulans

pH Stability

EC Number pH Stability pH Stability Maximum Comment Organism
3.2.1.37 4 6 stable up to 8 h at room temperature Aspergillus nidulans