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Literature summary extracted from
- Human intestinal sucrase-isomaltase. Identification of free sucrase and isomaltase and cleavage of the hybrid into active distinct subunits (1975), J. Biol. Chem., 250, 5735-5741.
KM Value [mM]
| EC Number | KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|---|
| 3.2.1.48 | 20 | - |
sucrose | - |
Homo sapiens |  |
Localization
| EC Number | Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|
Molecular Weight [Da]
| EC Number | Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|---|
| 3.2.1.48 | 130000 | - |
gel filtration, density gradient, equilibrium centrifugation, sucrase subunit | Homo sapiens |
| 3.2.1.48 | 280000 | - |
gel filtration, density gradient equilibrium centrifugation, human, sucrase-isomaltase complex | Homo sapiens |
Natural Substrates/ Products (Substrates)
| EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 3.2.1.48 | maltose + H2O | Homo sapiens | - |
2 glucose | - |
? | |
| 3.2.1.48 | sucrose + H2O | Homo sapiens | - |
D-glucose + D-fructose | - |
? | |
Organism
| EC Number | Organism | UniProt | Comment | Textmining |
|---|---|---|---|---|
| 3.2.1.48 | Homo sapiens | - |
human, sucrase/isomaltase molecule is an hybrid consisting of 2 distinct alpha-glucosidases | - |
Purification (Commentary)
| EC Number | Purification (Comment) | Organism |
|---|---|---|
| 3.2.1.48 | - |
Homo sapiens |
Source Tissue
| EC Number | Source Tissue | Comment | Organism | Textmining |
|---|
Specific Activity [micromol/min/mg]
| EC Number | Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|---|
| 3.2.1.48 | 47 | - |
- |
Homo sapiens |
Substrates and Products (Substrate)
| EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 3.2.1.48 | maltose + H2O | - |
Homo sapiens | 2 glucose | - |
? | |
| 3.2.1.48 | sucrose + H2O | - |
Homo sapiens | D-glucose + D-fructose | - |
? | |
Temperature Optimum [°C]
| EC Number | Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|---|
| 3.2.1.48 | 37 | - |
assay at | Homo sapiens |
pH Optimum
| EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|---|
| 3.2.1.48 | 6 | 6.5 | - |
Homo sapiens |
pH Range
| EC Number | pH Minimum | pH Maximum | Comment | Organism |
|---|---|---|---|---|
| 3.2.1.48 | 4 | 7.8 | pH 4, 35% of maximal activity, pH 7.8, 50% of maximal activity | Homo sapiens |
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Release 2023.1 (January 2023)
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