Cloned (Comment) | Organism |
---|---|
expressed in Escherichia coli BL21-CodonPlus(DE3)-RIL | Thermococcus kodakarensis |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
2-oxoglutarate | weak inhibition | Thermococcus kodakarensis | |
pyruvate | weak inhibition | Thermococcus kodakarensis |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.018 | - |
oxaloacetate | 60°C, pH 7.0 | Thermococcus kodakarensis | |
0.0181 | - |
oxaloacetate | pH 7.0, 60°C | Thermococcus kodakarensis | |
0.0185 | - |
GDP | pH 7.0, 60°C | Thermococcus kodakarensis | |
0.019 | - |
GDP | 60°C, pH 7.0 | Thermococcus kodakarensis | |
0.036 | - |
GTP | 60°C, pH 7.0 | Thermococcus kodakarensis | |
0.0361 | - |
GTP | pH 7.0, 60°C | Thermococcus kodakarensis | |
0.0712 | - |
IDP | pH 7.0, 60°C | Thermococcus kodakarensis | |
0.0715 | - |
ITP | pH 7.0, 60°C | Thermococcus kodakarensis | |
0.131 | - |
phosphoenolpyruvate | pH 7.0, 60°C | Thermococcus kodakarensis | |
0.131 | - |
phosphoenolpyruvate | 60°C, pH 7.0 | Thermococcus kodakarensis | |
0.465 | - |
ATP | pH 7.0, 60°C | Thermococcus kodakarensis | |
2.23 | - |
ADP | pH 7.0, 60°C | Thermococcus kodakarensis |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Co2+ | 21% of the activity with Mn2+ | Thermococcus kodakarensis | |
Co2+ | in the presence of one divalent cation alone, Mn2+ gives the highest activity. Mg2+ and Co2+also support the reaction, although the activities are 4.5% and 21%, respectively, of that with Mn2+. Km for Co2+: 0.752 mM. When Mg2+ is added as a second cation, in presemce of Mg2+, the Km values for CO2+ in both directions of the reaction are markedly decreased | Thermococcus kodakarensis | |
Mg2+ | 4.5% of the activity with Mn2+ | Thermococcus kodakarensis | |
Mg2+ | in the presence of one divalent cation alone, Mn2+ gives the highest activity. Mg2+ and Co2+also support the reaction, although the activities are 4.5% and 21%, respectively, of that with Mn2+. Km for Mg2+: 5.36 mM. When Mg2+ is added as a second cation, the Km values for Mn2+ in both directions of the reaction are markedly decreased to 0.021-0.022 mM | Thermococcus kodakarensis | |
Mn2+ | divalent cation required for reaction, highest activity with Mn2+ | Thermococcus kodakarensis | |
Mn2+ | in the presence of one divalent cation alone, Mn2+ gives the highest activity. Km for Mn2+: 0.263 mM. Mg2+ and Co2+also support the reaction, although the activities are 4.5% and 21%, respectively, of that with Mn2+ | Thermococcus kodakarensis | |
additional information | no activity with Ca2+, Zn2+, Cu2+, Ni2+, and Sr2+ | Thermococcus kodakarensis |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
70000 | - |
4 * 70000, SDS-PAGE | Thermococcus kodakarensis |
72036 | - |
4 * 72036, subunit mass calculated from the deduced amino acid sequence | Thermococcus kodakarensis |
72039 | - |
4 * 72039, calculated from sequence | Thermococcus kodakarensis |
284000 | - |
gel filtration | Thermococcus kodakarensis |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
GTP + oxaloacetate | Thermococcus kodakarensis | first committed step of gluconeogenesis, important enzyme in the interconversion between C3 and C4 metabolites, recycling of an excess of phosphoenolpyruvate produced from pyruvate | GDP + phosphoenolpyruvate + CO2 | - |
r | |
GTP + oxaloacetate | Thermococcus kodakarensis | one of the important enzymes in the interconversion between C3 and C4 metabolites. It provides phosphoenolpyruvate from oxaloacetate as the first step of gluconeogenesis. The enzyme plays an additional role in the recycling of excess phosphoenolpyruvate produced from pyruvate, replacing the function of the anaplerotic phosphoenolpyruvate carboxylase that is missing from this archaeon | GDP + phosphoenolpyruvate + CO2 | - |
r |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Thermococcus kodakarensis | Q6F494 | - |
- |
Thermococcus kodakarensis | Q6F494 | hyperthermophilic archaeon, highest enzyme level when grown with pyruvate as substrate | - |
Purification (Comment) | Organism |
---|---|
- |
Thermococcus kodakarensis |
recombinant protein | Thermococcus kodakarensis |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + oxaloacetate | poor substrate | Thermococcus kodakarensis | ADP + phosphoenolpyruvate + CO2 | - |
r | |
ATP + oxaloacetate | poor activity | Thermococcus kodakarensis | ADP + phosphoenolpyruvate + CO2 | - |
r | |
GTP + oxaloacetate | - |
Thermococcus kodakarensis | GDP + phosphoenolpyruvate + CO2 | - |
r | |
GTP + oxaloacetate | first committed step of gluconeogenesis, important enzyme in the interconversion between C3 and C4 metabolites, recycling of an excess of phosphoenolpyruvate produced from pyruvate | Thermococcus kodakarensis | GDP + phosphoenolpyruvate + CO2 | - |
r | |
GTP + oxaloacetate | one of the important enzymes in the interconversion between C3 and C4 metabolites. It provides phosphoenolpyruvate from oxaloacetate as the first step of gluconeogenesis. The enzyme plays an additional role in the recycling of excess phosphoenolpyruvate produced from pyruvate, replacing the function of the anaplerotic phosphoenolpyruvate carboxylase that is missing from this archaeon | Thermococcus kodakarensis | GDP + phosphoenolpyruvate + CO2 | - |
r | |
GTP + oxaloacetate | the enzyme prefers phosphoenolpyruvate formation from oxaloacetate | Thermococcus kodakarensis | GDP + phosphoenolpyruvate + CO2 | - |
r | |
ITP + oxaloacetate | - |
Thermococcus kodakarensis | IDP + phosphoenolpyruvate + CO2 | - |
r | |
ITP + oxaloacetate | ITP and IDP act as alternative nucleotide cofactors with similar Vmax values and slightly higher Km values | Thermococcus kodakarensis | IDP + phosphoenolpyruvate + CO2 | - |
r |
Subunits | Comment | Organism |
---|---|---|
homotetramer | 4 * 70000, SDS-PAGE | Thermococcus kodakarensis |
homotetramer | 4 * 72039, calculated from sequence | Thermococcus kodakarensis |
tetramer | 4 * 72036, subunit mass calculated from the deduced amino acid sequence | Thermococcus kodakarensis |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
80 | - |
- |
Thermococcus kodakarensis |
Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
---|---|---|---|
50 | 90 | 50°C: about 45% of maximal activity, 90°C: about 80% of maximal activity | Thermococcus kodakarensis |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
80 | - |
half life: 53 min | Thermococcus kodakarensis |
80 | - |
half-life: 53 min | Thermococcus kodakarensis |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7 | - |
- |
Thermococcus kodakarensis |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
6 | 8 | pH 6.0: about 50% of maximal activity, pH 8.0: about 50% of maximal activity | Thermococcus kodakarensis |
Organism | Comment | Expression |
---|---|---|
Thermococcus kodakarensis | higher expression levels under gluconeogenic conditions | up |
General Information | Comment | Organism |
---|---|---|
physiological function | one of the important enzymes in the interconversion between C3 and C4 metabolites. It provides phosphoenolpyruvate from oxaloacetate as the first step of gluconeogenesis. The enzyme plays an additional role in the recycling of excess phosphoenolpyruvate produced from pyruvate, replacing the function of the anaplerotic phosphoenolpyruvate carboxylase that is missing from this archaeon | Thermococcus kodakarensis |