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Literature summary for 3.2.1.8 extracted from
- Regulation, purification, and properties of xylanase from Cellulomonas fimi (1993), Enzyme Microb. Technol., 15, 990-995.
No PubMed abstract available
Activating Compound
| Activating Compound | Comment | Organism | Structure |
|---|---|---|---|
| maltose | stimulates xylanase A | Cellulomonas fimi |  |
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| 2-deoxyglucose | - |
Cellulomonas fimi | |
| Ca2+ | inactivation of xylanase B and C, slight inactivation of xylanase A | Cellulomonas fimi | |
| cellobiose | - |
Cellulomonas fimi | |
| Cu2+ | inactivation of xylanase B and C, low inactivation of xylanase A | Cellulomonas fimi | |
| D-glucose | - |
Cellulomonas fimi | |
| Fe2+ | marked inactivation of xylanase A, B and C | Cellulomonas fimi | |
| Hg2+ | HgCl2, xylanase A, B and C | Cellulomonas fimi | |
| iodoacetate | xylanase A, B and C | Cellulomonas fimi | |
| maltose | xylanase B | Cellulomonas fimi | |
| NEM | xylanase A, B and C | Cellulomonas fimi | |
| xylose | - |
Cellulomonas fimi | |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| additional information | - |
additional information | - |
Cellulomonas fimi |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 13200 | - |
xylanase A, gel filtration | Cellulomonas fimi |
| 22000 | - |
xylanase B, gel filtration | Cellulomonas fimi |
| 150000 | - |
xylanase C, gel filtration | Cellulomonas fimi |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| 1,4-beta-D-xylan + H2O | Cellulomonas fimi | catabolite repression occurs when glucose, cellobiose, and other readily metabolizable substrates are added during growth on carboxymethylcellulose | ? | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Cellulomonas fimi | - |
- |
- |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
| xylanase A, B, and C | Cellulomonas fimi |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| 2.38 | - |
xylanase B | Cellulomonas fimi |
| 2.43 | - |
xylanase A | Cellulomonas fimi |
| 31.3 | - |
xylanase C | Cellulomonas fimi |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| 1,4-beta-D-xylan + H2O | catabolite repression occurs when glucose, cellobiose, and other readily metabolizable substrates are added during growth on carboxymethylcellulose | Cellulomonas fimi | ? | - |
? | |
Temperature Optimum [°C]
| Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 40 | - |
xylanase B and C | Cellulomonas fimi |
| 45 | - |
xylanase A | Cellulomonas fimi |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 5 | - |
xylanase A | Cellulomonas fimi |
| 5.5 | 6.5 | xylanase C | Cellulomonas fimi |
| 6 | - |
xylanase B | Cellulomonas fimi |
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