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Literature summary for 3.2.1.20 extracted from
- Studies on alpha-glucosidase in rice. Part I. Isolation and some properties of alpha-glucosidase I and alpha-glucosidase II (1971), Agric. Biol. Chem., 35, 2015-2024.
No PubMed abstract available
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| erythritol | - |
Oryza sativa |  |
| Tris | - |
Oryza sativa | |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| 1.1 | - |
maltose | alpha-glucosidase I | Oryza sativa | |
| 2 | - |
maltose | alpha-glucosidase II | Oryza sativa | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Oryza sativa | - |
L. cv. Shinsetsu | - |
| Oryza sativa | - |
glucosidase I and II | - |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
- |
Oryza sativa |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| seed | - |
Oryza sativa | - |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| additional information | - |
- |
Oryza sativa |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| kojibiose + H2O | - |
Oryza sativa | alpha-D-glucose + D-glucose | - |
? | |
| maltose + H2O | - |
Oryza sativa | alpha-D-glucose + D-glucose | - |
? | |
| maltotetraose + H2O | - |
Oryza sativa | alpha-D-glucose | - |
? | |
| maltotriose + H2O | - |
Oryza sativa | maltose + D-glucose | - |
? | |
| nigerose + H2O | - |
Oryza sativa | 2 alpha-D-glucose | - |
? | |
| starch + H2O | - |
Oryza sativa | alpha-D-glucose | - |
? | |
Temperature Optimum [°C]
| Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 50 | - |
hydrolysis of soluble starch | Oryza sativa |
| 55 | - |
hydrolysis of maltose | Oryza sativa |
Temperature Range [°C]
| Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 20 | 70 | 20°C: about 35% of maximal activity of alpha-glucosidase I with starch as substrate, about 20% of maximal activity of alpha-glucosidase II with maltose as substrate, about 20% of maximal activity of alpha-glucosidase II with maltose as substrate, about 45% of maximal activity of alpha-glucosidase II with starch as substrate, 70°C: about 20% of maximal activity of alpha-glucosidase I with starch as substrate, about 20% of maximal activity of alpha-glucosidase II with maltose as substrate, about 15% of maximal activity of alpha-glucosidase II with maltose as substrate, about 30% of maximal activity of alpha-glucosidase II with starch as substrate | Oryza sativa |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 3.7 | 4 | alpha-glucosidase II | Oryza sativa |
| 4 | 4.3 | alpha-glucosidase I | Oryza sativa |
pH Range
| pH Minimum | pH Maximum | Comment | Organism |
|---|---|---|---|
| 3 | 6 | pH 3.0: about 40% of maximal activity of alpha-glucosidase I, about 65% of maximal activity of alpha-glucosidase II, pH 6.0: about 45% of maximal activity of alpha-glucosidase I, about 50% of maximal activity of glucosidase II | Oryza sativa |
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Release 2023.1 (January 2023)
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