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Literature summary extracted from
- Cytoplasmic and plasma membrane adenosine triphosphatase of polymorphonuclear neutrophils, comparison of their enzymatic properties and attempt for a direct determination of myosin ATPase activity using polymorphonuclear neutrophil extract (1980), Biochim. Biophys. Acta, 599, 246-253.
Activating Compound
| EC Number | Activating Compound | Comment | Organism | Structure |
|---|---|---|---|---|
| 5.6.1.8 | actin | - |
Cavia porcellus |  |
Localization
| EC Number | Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|---|
| 5.6.1.8 | cytoplasm | - |
Cavia porcellus | 5737 | - |
Natural Substrates/ Products (Substrates)
| EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 5.6.1.8 | ATP + H2O + myosin bound to actin filament at position n | Cavia porcellus | - |
ADP + phosphate + myosin bound to actin filament at position n+1 | - |
? | |
Organism
| EC Number | Organism | UniProt | Comment | Textmining |
|---|---|---|---|---|
| 5.6.1.8 | Cavia porcellus | - |
guinea pig | - |
Source Tissue
| EC Number | Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|---|
| 5.6.1.8 | leukocyte | polymorphonuclear neutrophils | Cavia porcellus | - |
Specific Activity [micromol/min/mg]
| EC Number | Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|---|
| 5.6.1.8 | 0.005 | - |
myosin B, Mg2+-ATPase, 0.5 M KCl | Cavia porcellus |
| 5.6.1.8 | 0.05 | - |
myosin B, Ca2+-ATPase, 0.5 M KCl | Cavia porcellus |
| 5.6.1.8 | 0.06 | - |
myosin B, EDTA-ATPase, 0.5 M KCl | Cavia porcellus |
Substrates and Products (Substrate)
| EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 5.6.1.8 | ATP + H2O + myosin bound to actin filament at position n | - |
Cavia porcellus | ADP + phosphate + myosin bound to actin filament at position n+1 | - |
? | |
pH Optimum
| EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|---|
| 5.6.1.8 | 9 | - |
myosin B, Ca2+-ATPase, EDTA-activated-ATPase, Mg2+-ATPase | Cavia porcellus |
pH Range
| EC Number | pH Minimum | pH Maximum | Comment | Organism |
|---|---|---|---|---|
| 5.6.1.8 | 6 | 9 | myosin B Ca2+-ATPase, U-shaped curve, minimum at pH 7, second maximum (lower) at pH 6 | Cavia porcellus |
| 5.6.1.8 | 6 | 9 | myosin B, EDTA-activated-ATPase, activity increases with rising pH, strong decrease above pH 9 | Cavia porcellus |
| 5.6.1.8 | 6 | 9 | myosin B, Mg2+-ATPase, little activity increase until pH 7, decrease above pH 9 | Cavia porcellus |
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Release 2023.1 (January 2023)
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