Inhibitors | Comment | Organism | Structure |
---|---|---|---|
8-bromo-ATP | no effect of enzyme activity in absence of spermidine, rather potent inhibitor in presence of stimulating amounts of spermidine | Saccharomyces cerevisiae | |
Ca2+ | - |
Saccharomyces cerevisiae | |
heparin | - |
Saccharomyces cerevisiae | |
N6-dimethylamine-adenosine 5'-triphosphate | no effect of enzyme activity in absence of spermidine, rather potent inhibitor in presence of stimulating amounts of spermidine | Saccharomyces cerevisiae |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.3 | 0.5 | ATP | - |
Saccharomyces cerevisiae |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | required | Saccharomyces cerevisiae |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
45000 | - |
x * 45000, on storage the enzyme degrades to MW 30000 Da and 35000 Da but retains full activity, SDS-PAGE | Saccharomyces cerevisiae |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Saccharomyces cerevisiae | - |
- |
- |
Saccharomyces cerevisiae ade5 MATa | - |
- |
- |
Purification (Comment) | Organism |
---|---|
- |
Saccharomyces cerevisiae |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
ATP + 1-phosphatidyl-1D-myo-inositol = ADP + 1-phosphatidyl-1D-myo-inositol 4-phosphate | sequential bi-bi reaction mechanism. Phosphatidylinositol binds prior to ATP, and phosphatidylinositol 4-phosphate is the first product released in the reaction | Saccharomyces cerevisiae |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
4.75 | - |
- |
Saccharomyces cerevisiae |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + 1-phosphatidyl-1D-myo-inositol | - |
Saccharomyces cerevisiae | ADP + 1-phosphatidyl-1D-myo-inositol 4-phosphate | - |
? | |
ATP + 1-phosphatidyl-1D-myo-inositol | - |
Saccharomyces cerevisiae ade5 MATa | ADP + 1-phosphatidyl-1D-myo-inositol 4-phosphate | - |
? |
Subunits | Comment | Organism |
---|---|---|
? | x * 45000, on storage the enzyme degrades to MW 30000 Da and 35000 Da but retains full activity, SDS-PAGE | Saccharomyces cerevisiae |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
30 | - |
labile above | Saccharomyces cerevisiae |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
2.77 | - |
ATP | - |
Saccharomyces cerevisiae | |
2.77 | - |
1-phosphatidyl-1D-myo-inositol | - |
Saccharomyces cerevisiae |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8 | - |
- |
Saccharomyces cerevisiae |