General Stability | Organism |
---|---|
stabilization of PuuD activity by beta-mercaptoethanol | Escherichia coli K-12 |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
28500 | - |
2 * 28500, calcaulation from amino-acid sequence | Escherichia coli K-12 |
57000 | - |
gel filtration | Escherichia coli K-12 |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-(gamma-glutamylamino)butanoate + H2O | Escherichia coli K-12 | enzyme is involved in the gamma-glutamyl-gamma-aminobutyrate hydrolase pathway for the degradation of putrescine to succinate semialdehyde. PuuD is essential for growth on putrescine as a sole source of nitrogen. Expression of the enzyme is induced by putrescine and O2. Addition of succinate and NH4Cl to the medium reduces the expression of PuuD | 4-aminobutanoate + L-glutamate | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Escherichia coli K-12 | P76038 | - |
- |
Purification (Comment) | Organism |
---|---|
- |
Escherichia coli K-12 |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
additional information | enzyme is expressed most highly in early stationary phase. The expression of puuD is dramatically repressed when Escherichia coli is grown up with low aeration | Escherichia coli K-12 | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-(gamma-glutamylamino)butanoate + H2O | enzyme is involved in the gamma-glutamyl-gamma-aminobutyrate hydrolase pathway for the degradation of putrescine to succinate semialdehyde. PuuD is essential for growth on putrescine as a sole source of nitrogen. Expression of the enzyme is induced by putrescine and O2. Addition of succinate and NH4Cl to the medium reduces the expression of PuuD | Escherichia coli K-12 | 4-aminobutanoate + L-glutamate | - |
? | |
gamma-(glutamylamino)butanoate + H2O | Cys114 is the active center of PuuD | Escherichia coli K-12 | gamma-aminobutanoate + L-glutamate | - |
? |
Subunits | Comment | Organism |
---|---|---|
dimer | 2 * 28500, calcaulation from amino-acid sequence | Escherichia coli K-12 |
Synonyms | Comment | Organism |
---|---|---|
PuuD | - |
Escherichia coli K-12 |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8.5 | 9 | - |
Escherichia coli K-12 |