General Stability | Organism |
---|---|
xylose protects against thermal inactivation | Cucumis sativus |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
Ag+ | competitve inhibition | Cucumis sativus | |
beta-D-xylose | 43% competitive inhibition at 20 mM for beta-xylosidase A | Cucumis sativus | |
Hg2+ | competitive inhibition | Cucumis sativus | |
iodoacetate | inhibition of beta-xylosidase A | Cucumis sativus | |
p-chloromercuribenzoate | inhibition of beta-xylosidase A | Cucumis sativus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
1.5 | - |
p-nitrophenyl beta-D-xylopyranoside | xylosidase A | Cucumis sativus | |
5.4 | - |
p-nitrophenyl beta-D-xylopyranoside | xylosidase B | Cucumis sativus |
Localization | Comment | Organism | GeneOntology No. | Textmining |
---|---|---|---|---|
intracellular | - |
Cucumis sativus | 5622 | - |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
68000 | - |
both beta-xylosidase A and B, SDS-PAGE, gel filtration | Cucumis sativus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
xylo-oligosaccharides + H2O | Cucumis sativus | beta-xylosidase A | beta-D-xylose + ? | - |
? | |
xylo-oligosaccharides + H2O | Cucumis sativus | derived from xylan | beta-D-xylose + ? | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Cucumis sativus | - |
- |
- |
Posttranslational Modification | Comment | Organism |
---|---|---|
glycoprotein | - |
Cucumis sativus |
Purification (Comment) | Organism |
---|---|
near homogeneity for beta-xylosidase A, partial for beta-xylosidase B | Cucumis sativus |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
seed | - |
Cucumis sativus | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
21.3 | - |
beta-xylosidase A | Cucumis sativus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
p-nitrophenyl beta-D-xylopyranoside + H2O | - |
Cucumis sativus | p-nitrophenol + beta-D-xylopyranose | - |
? | |
xylo-oligosaccharides + H2O | beta-xylosidase A | Cucumis sativus | beta-D-xylose + ? | - |
? | |
xylo-oligosaccharides + H2O | derived from xylan | Cucumis sativus | beta-D-xylose + ? | - |
? |
Synonyms | Comment | Organism |
---|---|---|
beta-xylosidase A | - |
Cucumis sativus |
beta-xylosidase B | - |
Cucumis sativus |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
50 | - |
xylosidase B | Cucumis sativus |
68 | - |
xylosidase A | Cucumis sativus |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
75 | - |
inactivated after 30 min | Cucumis sativus |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
4.5 | - |
both xylosidase A and B | Cucumis sativus |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
4 | 8 | fully active, beta-xylosidase A | Cucumis sativus |
pH Stability | pH Stability Maximum | Comment | Organism |
---|---|---|---|
3 | - |
18% of original activity remains | Cucumis sativus |