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Literature summary for 3.2.1.48 extracted from
- Inhibition of brush border sucrase by polyphenols in mouse intestine (2010), Biosci. Rep., 30, 111-117.
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| gallic acid | inhibition of brush border sucrase by polyphenols in mouse intestine. Inhibition by gallic acid is a pure V effect at pH 5.0, which changes to mixed type at pH 7.2, and pure K effect at pH 8.5 | Mus musculus |  |
| additional information | inhibition of mice sucrase by polyphenols is pH-dependent, and is associated with conformational modifications of the enzyme. At pH 4.8, the polyphenols inhibit sucrase activity by 85-96%, which is reduced to 51 and 64%, respectively, at pH 7.2. However, at pH 8.5, 60 and 76% inhibition of enzyme activity | Mus musculus | |
| Tannic acid | inhibition of brush border sucrase by polyphenols in mouse intestine. Sucrase inhibition by tannic acid is a pure K effect at acidic pH and uncompetitive type in the alkaline pH range | Mus musculus | |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| additional information | - |
additional information | Km values in presence of inhibitors, at pH 7.2, both gallic acid and tannic acid show mixed-type enzyme inhibition, Km is enhanced by 77-114% and Vmax by 55-60%, overview | Mus musculus | |
| 96.7 | - |
sucrose | pH 8.5 | Mus musculus | |
| 130 | - |
sucrose | pH 5.0 | Mus musculus | |
| 138 | - |
sucrose | pH 7.2 | Mus musculus | |
Localization
| Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|
| brush border | - |
Mus musculus | 5903 | - |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 210000 | - |
x * 210000, about | Mus musculus |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| sucrose + H2O | Mus musculus | - |
alpha-D-glucose + D-fructose | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Mus musculus | - |
- |
- |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
| native enzyme from brush border 155fold by isolation from the microvillus membranes by papain, gel filtration and anion exchange chromatography | Mus musculus |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| intestine | - |
Mus musculus | - |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| sucrose + H2O | - |
Mus musculus | alpha-D-glucose + D-fructose | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| ? | x * 210000, about | Mus musculus |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 7.2 | - |
assay at | Mus musculus |
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