Inhibitors | Comment | Organism | Structure |
---|---|---|---|
Cd2+ | inhibits Cd2+-saturated enzyme, inhibits the Ni2+-saturated enzyme | Escherichia coli | |
Co2+ | inhibits Cd2+-saturated enzyme, inhibits the Ni2+-saturated enzyme | Escherichia coli | |
EDTA | complete loss of activity after dialysis with EDTA | Escherichia coli | |
Fe2+ | inhibits the Ni2+-saturated enzyme | Escherichia coli | |
Ni2+ | inhibits Cd2+-saturated enzyme | Escherichia coli | |
Zn2+ | inhibits Cd2+-saturated enzyme, inhibits the Ni2+-saturated enzyme | Escherichia coli |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
4.9 | - |
Leu-4-nitroanilide | pH 7.5, 37°C | Escherichia coli | |
7.8 | - |
Cys-Gly | pH 7.5, 37°C | Escherichia coli | |
13.5 | - |
Leu-Gly | pH 7.5, 37°C | Escherichia coli |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Cd2+ | activates | Escherichia coli | |
Co2+ | activates. Enzyme contains 0.00063 atoms per subunit, wild-type enzyme | Escherichia coli | |
KCl | enhances activity, maximal activation at 50 mM | Escherichia coli | |
Mn2+ | activates. Enzyme contains 0.0026 atoms per subunit, wild-type enzyme | Escherichia coli | |
NaCl | enhances activity | Escherichia coli | |
NH4Cl | enhances activity, maximal activation at 100 mM | Escherichia coli | |
Ni2+ | activates | Escherichia coli | |
Zn2+ | enzyme contains 0.036 atoms per subunit, wild-type enzyme | Escherichia coli |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Escherichia coli | - |
K 12 | - |
Purification (Comment) | Organism |
---|---|
- |
Escherichia coli |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
Ala-4-nitroanilide + H2O | 4.6% of the activity with Leu-4-nitroanilide | Escherichia coli | Ala + 4-nitroaniline | - |
? | |
alpha-Glu-4-nitroanilide + H2O | 564% of the activity with Leu-4-nitroanilide | Escherichia coli | Glu + 4-nitroaniline | - |
? | |
Arg-4-nitroanilide + H2O | 2.5% of the activity with Leu-4-nitroanilide | Escherichia coli | Arg + 4-nitroaniline | - |
? | |
Cys-Gly + H2O | 4210% of the activity with Leu-4-nitroanilide | Escherichia coli | Cys + Gly | - |
? | |
Gly-4-nitroanilide + H2O | 1.3% of the activity with Leu-4-nitroanilide | Escherichia coli | Gly + 4-nitroaniline | - |
? | |
Leu-4-nitroanilide + H2O | - |
Escherichia coli | Leu + 4-nitroaniline | - |
? | |
Leu-Gly + H2O | 1200% of the activity with Leu-4-nitroanilide | Escherichia coli | Leu + Gly | - |
? | |
Met-4-nitroanilide + H2O | 40.6% of the activity with Leu-4-nitroanilide | Escherichia coli | Met + 4-nitroaniline | - |
? | |
Val-4-nitroanilide + H2O | 1.2% of the activity with Leu-4-nitroanilide | Escherichia coli | Val + 4-nitroaniline | - |
? |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
additional information | - |
stabilized against heat in the presence of Mn2+ or Co2+ | Escherichia coli |
55 | - |
EDTA-dialyzed enzyme is completely inactivated within 2 min. The enzyme of which the divalent cation has has been replaced with Mn2+ or Co2+ is quite stable up to 10 min. The Mn2+-dialyzed sample gradually loses its activity, only 75% of its original levels remains after 10 min | Escherichia coli |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
307 | - |
Leu-4-nitroanilide | pH 7.5, 37°C | Escherichia coli | |
6630 | - |
Leu-Gly | pH 7.5, 37°C | Escherichia coli | |
10700 | - |
Cys-Gly | pH 7.5, 37°C | Escherichia coli |