Inhibitors | Comment | Organism | Structure |
---|---|---|---|
EDTA | dialysis against EDTA leads to an irreversible loss of activity | Haloferax volcanii | |
L-isoleucine | weakly | Haloferax volcanii | |
L-valine | inhibits to a maximal activity of approximately 50% at concentrations higher than 0.5 mM | Haloferax volcanii | |
Mn2+ | activates, high concentrations inhibit | Haloferax volcanii | |
additional information | leucine had negligible effect on the activity | Haloferax volcanii | |
sulfometuron methyl | - |
Haloferax volcanii |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
25.5 | - |
pyruvate | pH 7.5, 37°C, in the presence of 3.5 M KCl | Haloferax volcanii |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
KCl | maximal activity required KCl concentrations of greater than 3.5 M | Haloferax volcanii | |
Mg2+ | Mg2 is probably the natural cofactor of the enzyme. Halofgerax volcanii is thought to contain a high intracellular Mg2+ concentration, as its native habitat, the Dead Sea, contains 1.4 M MgCl2. The endogenous metal is apparently tightly-enough bound so that added Mg2+ does not stimulate the activity | Haloferax volcanii | |
Mn2+ | activates, high concentrations inhibit | Haloferax volcanii | |
NaCl | while raising the NaCl concentration from 1.5 to 3.5 M leads to an increase in enzyme activity, this increase is 3fold lower than that detected in the presence of optimal KCl levels | Haloferax volcanii |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Haloferax volcanii | - |
- |
- |
Haloferax volcanii DSM 3757 | - |
- |
- |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
0.0043 | - |
substrate: pyruvate, pH 7.5, 37°C, in the presence of 3.5 M KCl | Haloferax volcanii |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
2 pyruvate | - |
Haloferax volcanii | 2-acetolactate + CO2 | - |
? | |
2 pyruvate | - |
Haloferax volcanii DSM 3757 | 2-acetolactate + CO2 | - |
? |
Synonyms | Comment | Organism |
---|---|---|
acetohydroxy acid synthase | - |
Haloferax volcanii |
AHAS | - |
Haloferax volcanii |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
35 | 40 | - |
Haloferax volcanii |
37 | - |
assay at | Haloferax volcanii |
Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
---|---|---|---|
25 | 45 | activity can be detected between 25 and 45°C, with the 3540°C range being optimal. A rapid loss in catalytic activity is observed above 45°C | Haloferax volcanii |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.5 | - |
assay at | Haloferax volcanii |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
thiamine diphosphate | required cofactor, apparent Km: 0.0088 mM | Haloferax volcanii |
Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
---|---|---|---|---|---|
0.005 | - |
sulfometuron methyl | pH 7.5, 37°C, in the presence of 3.5 M KCl | Haloferax volcanii |