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Literature summary for 3.2.1.26 extracted from
- Purification and characterization of two soluble acid invertase isozymes from Japanese pear fruit (2003), Phytochemistry, 63, 125-129.
General Stability
| General Stability | Organism |
|---|---|
| recovery of isoenzyme AIV II activity in purification is less than that of isoenzyme AIV II due to its lower stability | Pyrus pyrifolia |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| 3.33 | - |
sucrose | pH 4.5, 30°C, isoenzyme AIV I | Pyrus pyrifolia |  |
| 4.58 | - |
sucrose | pH 4.5, 30°C, isoenzyme AIV II | Pyrus pyrifolia | |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 66000 | - |
isoenzyme AIV I, gel filtration | Pyrus pyrifolia |
| 80000 | - |
1 * 80000, isoenzyme AIV I, SDS-PAGE | Pyrus pyrifolia |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Pyrus pyrifolia | - |
- |
- |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
| isoenzyme AIV I and AIV II | Pyrus pyrifolia |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| fruit | - |
Pyrus pyrifolia | - |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| 140.4 | - |
- |
Pyrus pyrifolia |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| additional information | no hydrolysis of lactose, maltose, trehalose, melizitose and melibiose | Pyrus pyrifolia | ? | - |
? | |
| raffinose + H2O | about 20% of the activity with sucrose, isoenzyme AIV I and AIV II | Pyrus pyrifolia | beta-D-fructose + melibiose | - |
? | |
| stachyose + H2O | about 20% of the activity with sucrose, isoenzyme AIV I and AIV II | Pyrus pyrifolia | ? | - |
? | |
| sucrose + H2O | isoenzyme AIV I and AIV II | Pyrus pyrifolia | beta-D-fructose + alpha-D-glucose | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| monomer | 1 * 80000, isoenzyme AIV I, SDS-PAGE | Pyrus pyrifolia |
Synonyms
| Synonyms | Comment | Organism |
|---|---|---|
| AIV | - |
Pyrus pyrifolia |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 4.5 | - |
pH-optimum | Pyrus pyrifolia |
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Release 2023.1 (January 2023)
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