Cloned (Comment) | Organism |
---|---|
recombinant expression of wild-type and mutant enzymes in Escherichia coli strain BL21(DE3) | Pseudomonas sp. N176 |
Protein Variants | Comment | Organism |
---|---|---|
H57betaS/H70betaS | naturally occuring mutations, the two mutations increase the activity by fourfold. Structure-activity modelling using wild-type and mutant enzymes, overview. Design of N176 cephalosporin acylase at active site and structure model of predicted mutation V68betaA | Pseudomonas sp. N176 |
L154betaF | site-directed mutagenesis, mutant M8, the mutant displays improved stability and activity compared to the wild-type | Pseudomonas sp. N176 |
L154betaF/L180betaF | site-directed mutagenesis, mutant M10, the mutant displays improved stability and activity compared to the wild-type | Pseudomonas sp. N176 |
L154betaF/Y167betaF/L180betaF | site-directed mutagenesis, the mutant displays improved stability and activity compared to the wild-type | Pseudomonas sp. N176 |
L180betaF | site-directed mutagenesis, mutant M9, the mutant displays improved stability and activity compared to the wild-type | Pseudomonas sp. N176 |
M31betaF/H57betaS/H70betaS | site-directed mutagenesis, mutant M1, the mutant displays improved stability and activity compared to the mutant M2 | Pseudomonas sp. N176 |
M31betaF/H57betaS/V68betaA/H70betaS | site-directed mutagenesis, mutant M2, the mutant shows a decrease in stability compared to wild-type, which is largely owing to the mutation V68betaA at the active site | Pseudomonas sp. N176 |
M31betaF/H57betaS/V68betaA/H70betaS/L154betaF/L180betaF | site-directed mutagenesis | Pseudomonas sp. N176 |
additional information | mutation V68betaA at the active site causes a loss in protein stability. The lost stability because is recovered by introducing mutations L154betaF and L180betaF at hydrophobic core regions. Mutation V68betaA in the six-residue mutant provides more space to accommodate the bulky side chain of cephalosporin C, which can help in designing cephalosporin C acylase mutants with higher activities and the practical one-step enzymatic route to prepare 7-aminocephalosporanic acid at industrial-scale levels | Pseudomonas sp. N176 |
Y167betaF | site-directed mutagenesis, the mutant displays improved stability and activity compared to the wild-type | Pseudomonas sp. N176 |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
9.3 | - |
cephalosporin C | recombinant mutant L154betaF/L180betaF, pH 8.0, 37°C | Pseudomonas sp. N176 | |
9.73 | - |
cephalosporin C | recombinant mutant L154betaF, pH 8.0, 37°C | Pseudomonas sp. N176 | |
10.14 | - |
cephalosporin C | recombinant mutant L180betaF, pH 8.0, 37°C | Pseudomonas sp. N176 | |
12.38 | - |
cephalosporin C | recombinant mutant M31betaF/H57betaS/V68betaA/H70betaS, pH 8.0, 37°C | Pseudomonas sp. N176 | |
12.65 | - |
cephalosporin C | recombinant mutant M31betaF/H57betaS/H70betaS, pH 8.0, 37°C | Pseudomonas sp. N176 |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
(7R)-7-(4-carboxybutanamido)cephalosporanate + H2O | Pseudomonas sp. N176 | - |
(7R)-7-aminocephalosporanate + glutarate | - |
? | |
cephalosporin C + H2O | Pseudomonas sp. N176 | low activity | 7-aminocephalosporanic acid + 2-amino-5-hydroxypentanoate | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Pseudomonas sp. N176 | A0A1D8GRD5 | - |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
(7R)-7-(4-carboxybutanamido)cephalosporanate + H2O | - |
Pseudomonas sp. N176 | (7R)-7-aminocephalosporanate + glutarate | - |
? | |
(7R)-7-(4-carboxybutanamido)cephalosporanate + H2O | GL-7-ACA | Pseudomonas sp. N176 | (7R)-7-aminocephalosporanate + glutarate | - |
? | |
cephalosporin C + H2O | low activity | Pseudomonas sp. N176 | 7-aminocephalosporanic acid + 2-amino-5-hydroxypentanoate | - |
? | |
cephalosporin C + H2O | CPC, low activity | Pseudomonas sp. N176 | 7-aminocephalosporanic acid + 2-amino-5-hydroxypentanoate | - |
? | |
additional information | the D-2-aminoadipyl side chain of CPC is much larger than the glutaryl side chain of GL-7-ACA, and the activity of N176 acylase toward CPC is only 4% compared with the activity toward GL-7-ACA | Pseudomonas sp. N176 | ? | - |
- |
Synonyms | Comment | Organism |
---|---|---|
cephalosporin C acylase | - |
Pseudomonas sp. N176 |
N176 cephalosporin C acylase | - |
Pseudomonas sp. N176 |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
assay at | Pseudomonas sp. N176 |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8 | - |
assay at | Pseudomonas sp. N176 |
General Information | Comment | Organism |
---|---|---|
additional information | structure-activity modelling using wild-type and mutant enzymes, active site structures, overview | Pseudomonas sp. N176 |