The enzyme is useful for the determination of inorganic phosphate in clinical analysis.
| 由来 | recombinant E. coli |
|---|---|
| 系统名称 | Sucrose : orthophosphate α-D-glucosyltransferase |
| EC编号 | 2.4.1.7 |
| 反应式 | Sucrose + Orthophosphate →→→ D-Fructose + α-D-Glucose 1-phosphate |
| Appearance | white lyophilizate |
|---|---|
| Activity | ≧50 U/mg |
| Stabilizer | sucrose |
| Storage condition | below -20℃ |
| Molecular weight | ca. 56 kDa (gel filtration) |
|---|---|
| Structure | monomer of 56 kDa (SDS-PAGE) |
| Isoelectric point | 4.6 |
| Michaelis constant | 3.9×10-2M (sucrose) |
| 6.2×10-3M (phosphate) | |
| pH Optimum | 7.5 |
| pH Stability | 5.0–8.0 |
| Optimum temperature | 40℃ |
| Thermal stability | below 45℃ |
| Stability (liquid form) | stable at 37℃ for at least two weeks |
| Stability (powder form) | stable at 30℃ for at least two weeks |
| Inhibitors | glucose, glucono-1,5-lactone |
| Specificity | sucrose (100), maltose (0), starch (0) |
The enzyme is useful for the determination of inorganic phosphate in clinical analysis.
