Activating Compound | Comment | Organism | Structure |
---|---|---|---|
dithiothreitol | the enzyme requires the presence of dithiothreitol for maximum activity | Methanocaldococcus jannaschii |
Cloned (Comment) | Organism |
---|---|
overexpression in Escherichia coli | Methanocaldococcus jannaschii |
Protein Variants | Comment | Organism |
---|---|---|
C136A | mutant has 90% of the activity compared to wild type in the presence of Fe(II). As the wild-type enzyme the mutant enzyme requires dithiothreitol for activity | Methanocaldococcus jannaschii |
C151S | mutant has 6% of the activity compared to wild type in the presence of Fe(II). When dithiothreitol is present in the reaction the mutant shows 24% of the wild type activity | Methanocaldococcus jannaschii |
C229A | mutant has 92% of the activity compared to wild type in the presence of Fe(II) | Methanocaldococcus jannaschii |
C71S | mutant has 4% of the activity compared to wild type in the presence of Fe(II). When dithiothreitol is present in the reaction the mutant shows 24% of the wild type activity | Methanocaldococcus jannaschii |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
iodoacetic acid | the enzyme is rendered inactive when the purified enzyme is incubated with dithiothreitol followed by excess iodoacetic acid | Methanocaldococcus jannaschii | |
L-arginine | 44% inhibition at at 16.7 mM | Methanocaldococcus jannaschii | |
N-ethylmaleinimide | the enzyme is rendered inactive when the purified enzyme is incubated with dithiothreitol followed by excess N-ethylmaleimide | Methanocaldococcus jannaschii | |
putrescine | 43% inhibition at 8.3 mM, 60% inhibition at 16.7 mM | Methanocaldococcus jannaschii |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
2.4 | - |
agmatine | pH 7.5, 70°C, wild-type enzyme | Methanocaldococcus jannaschii | |
5.8 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C229A | Methanocaldococcus jannaschii | |
6.2 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C151S | Methanocaldococcus jannaschii | |
9.2 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C136A | Methanocaldococcus jannaschii | |
11 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C71S | Methanocaldococcus jannaschii |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Fe2+ | Fe(II)-dependent agmatinase. Requires the presence of 4 equivalents of Fe(II) for maximum activity | Methanocaldococcus jannaschii | |
Mn2+ | supports activity at 15% of the activation by Fe2+ | Methanocaldococcus jannaschii |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
40000 | - |
x * 40000, SDS-PAGE | Methanocaldococcus jannaschii |
190000 | - |
gel filtration | Methanocaldococcus jannaschii |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Methanocaldococcus jannaschii | Q57757 | - |
- |
Methanocaldococcus jannaschii DSM 2661 | Q57757 | - |
- |
Purification (Comment) | Organism |
---|---|
wild-type and mutant enzymes | Methanocaldococcus jannaschii |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
0.45 | - |
pH 7.5, 70°C | Methanocaldococcus jannaschii |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
agmatine + H2O | - |
Methanocaldococcus jannaschii | putrescine + urea | - |
? | |
agmatine + H2O | - |
Methanocaldococcus jannaschii DSM 2661 | putrescine + urea | - |
? |
Subunits | Comment | Organism |
---|---|---|
? | x * 40000, SDS-PAGE | Methanocaldococcus jannaschii |
Synonyms | Comment | Organism |
---|---|---|
MJ0309 | locus name | Methanocaldococcus jannaschii |
SpeB | - |
Methanocaldococcus jannaschii |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
70 | - |
assay at | Methanocaldococcus jannaschii |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0075 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C71S | Methanocaldococcus jannaschii | |
0.0095 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C151S | Methanocaldococcus jannaschii | |
0.023 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C136A | Methanocaldococcus jannaschii | |
0.032 | - |
agmatine | pH 7.5, 70°C, wild-type enzyme | Methanocaldococcus jannaschii | |
0.041 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C229A | Methanocaldococcus jannaschii |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.5 | - |
assay at | Methanocaldococcus jannaschii |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
6.5 | 10 | no activity is detected at pH 6.5 and the measured activity steadily increases to pH 10.0. Higher pH values are tested but the observation of activity is dependent on the buffer used and are not reported here. Agmatine shows no hydrolysis in the pH 10 and 11 buffers and assay conditions used | Methanocaldococcus jannaschii |
kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.00069 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C71S | Methanocaldococcus jannaschii | |
0.0015 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C151S | Methanocaldococcus jannaschii | |
0.0025 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C136A | Methanocaldococcus jannaschii | |
0.0077 | - |
agmatine | pH 7.5, 70°C, mutant enzyme C229A | Methanocaldococcus jannaschii | |
0.013 | - |
agmatine | pH 7.5, 70°C, wild-type enzyme | Methanocaldococcus jannaschii |