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Literature summary for 2.7.9.1 extracted from
- Properties and reaction mechanism of C4 leaf pyruvate,Pi dikinase (1985), Arch. Biochem. Biophys., 239, 53-62.
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| AMP | non competitive with respect to ATP | Zea mays |  |
| diphosphate | non competitive to phosphate | Zea mays | |
| phosphoenolpyruvate | competitive to pyruvate | Zea mays | |
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| 0.042 | - |
ATP | pH 7.4, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.046 | - |
phosphoenolpyruvate | pH 7.4, 25ºC, pyruvate formation | Zea mays | |
| 0.082 | - |
ATP | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.082 | - |
pyruvate | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.092 | - |
pyruvate | pH 7.4, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.16 | - |
phosphoenolpyruvate | pH 7.4, 25ºC, pyruvate formation | Zea mays | |
| 0.38 | - |
phosphate | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.56 | - |
phosphate | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
Metals/Ions
| Metals/Ions | Comment | Organism | Structure |
|---|---|---|---|
| K+ | more than 20fold activation pH 7.4 and at pH 8.1 | Zea mays | |
| Na+ | slight activation of the phosphoenol pyruvate formation | Zea mays | |
| NH4+ | more than 20fold activation at pH 7.4 and at pH 8.1 | Zea mays | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Zea mays | - |
var. Dekalb XL 81 | - |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
- |
Zea mays |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| leaf | - |
Zea mays | - |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| ATP + pyruvate + phosphate | - |
Zea mays | AMP + phosphoenolpyruvate + diphosphate | - |
? | |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 6.9 | - |
pyruvate formation | Zea mays |
| 8.2 | - |
phosphoenolpyruvate formation | Zea mays |
Ki Value [mM]
| Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
|---|---|---|---|---|---|
| 0.13 | - |
AMP | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.15 | - |
phosphoenolpyruvate | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
| 0.32 | - |
diphosphate | pH 8.1, 25ºC, phosphoenolpyruvate formation | Zea mays | |
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