EC Number |
KM Value [mM] |
KM Value Maximum [mM] |
Substrate |
Reference |
---|
4.3.1.B2 | 0.0015 |
- |
L-glutamine |
pH 8.0, 30°C, IGP synthase holoenzyme |
726928 |
4.3.1.B2 | 0.021 |
- |
N1-[(5'-phosphoribulosyl)formimino]-5-aminoimidazole-4-carboxamido-1-beta-D-ribofuranosyl 5'-phosphate |
pH 8.0, 30°C, HisF subunit, saturating concentrations of ammonium chloride can not be achieved due to inhibition of the enzyme activity at chloride ion concentrations |
726928 |
4.3.1.B2 | 0.24 |
- |
N1-[(5'-phosphoribulosyl)formimino]-5-aminoimidazole-4-carboxamido-1-beta-D-ribofuranosyl 5'-phosphate |
pH 8.0, 30°C, IGP synthase holoenzyme |
726928 |
4.3.1.B2 | 15 |
- |
NH3 |
pH 8.0, 30°C, HisF subunit |
726928 |
4.3.1.B2 | 16 |
- |
NH3 |
pH 8.0, 30°C, IGP synthase holoenzyme |
726928 |
4.3.1.B2 | 266 |
- |
NH4+ |
pH 8.0, 30°C, HisF subunit |
726928 |
4.3.1.B2 | 291 |
- |
NH4+ |
pH 8.0, 30°C, IGP synthase holoenzyme |
726928 |
4.3.1.B2 | 0.0016 |
- |
N1-[(5'-phosphoribulosyl)formimino]-5-aminoimidazole-4-carboxamido-1-beta-D-ribofuranosyl 5'-phosphate |
pH 7.0, 30°C, cosubstrate: L-glutamine, mutant enzyme R239K |
726939 |
4.3.1.B2 | 0.0018 |
- |
N1-[(5'-phosphoribulosyl)formimino]-5-aminoimidazole-4-carboxamido-1-beta-D-ribofuranosyl 5'-phosphate |
pH 7.0, 30°C, cosubstrate: L-glutamine, mutant enzyme K360A |
726939 |
4.3.1.B2 | 0.002 |
- |
N1-[(5'-phosphoribulosyl)formimino]-5-aminoimidazole-4-carboxamido-1-beta-D-ribofuranosyl 5'-phosphate |
pH 7.0, 30°C, cosubstrate: L-glutamine, mutant enzyme K258R |
726939 |