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Literature summary for 2.4.1.18 extracted from
- Studies of glycogen branching enzyme. Preparation and properties of alpha-1,4-glucan- alpha-1,4-glucan 6-glycosyltransferase and its action on the characteristic polysaccharide of the liver of children with Type IV glycogen storage disease (1971), Biochemistry, 10, 4253-4262.
Activating Compound
| Activating Compound | Comment | Organism | Structure |
|---|---|---|---|
| citrate | 0.15 M sodium citrate, 2fold stimulation | Oryctolagus cuniculus |  |
| potassium alpha-D-glucose 1-phosphate | 0.05 M, 2fold stimulation | Oryctolagus cuniculus | |
General Stability
| General Stability | Organism |
|---|---|
| urea, 2 M irreversible denaturation | Oryctolagus cuniculus |
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| maltoheptaose | 40% inhibition at 15 mM | Oryctolagus cuniculus | |
| maltohexaose | - |
Oryctolagus cuniculus | |
| maltononaose | - |
Oryctolagus cuniculus | |
| maltooctaose | - |
Oryctolagus cuniculus | |
| Urea | 50% inhibition at 0.4 M, complete inhibition at 2 M. Up to 2 M, reversible inhibition | Oryctolagus cuniculus | |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| 0.0056 | - |
amylopectin | pH 6.4, 30°C, type IV amylopectin | Oryctolagus cuniculus | |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 92000 | 103000 | sucrose density gradient centrifugation | Oryctolagus cuniculus |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Oryctolagus cuniculus | - |
- |
- |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
- |
Oryctolagus cuniculus |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| skeletal muscle | - |
Oryctolagus cuniculus | - |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| 306 | - |
- |
Oryctolagus cuniculus |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| amylopectin | - |
Oryctolagus cuniculus | ? | - |
? | |
Temperature Optimum [°C]
| Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 30 | 35 | - |
Oryctolagus cuniculus |
Temperature Range [°C]
| Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 22 | 45 | 22°C: about 50% of maximal activity, 45°C: about 60% of maximal activity | Oryctolagus cuniculus |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 6.8 | 7.4 | citrate buffer | Oryctolagus cuniculus |
| 7.2 | 7.6 | glucose 1-phosphate buffer | Oryctolagus cuniculus |
| 7.4 | - |
- |
Oryctolagus cuniculus |
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