Table 2. Steady-state parameters of 5/B/6 MBL mutants.
Enzyme | Cefuroxime Hydrolysis | |||||
---|---|---|---|---|---|---|
No 10-mera | + 500 μM 10-mera | |||||
Km (mM) | kcat (s-1) | kcat/Km (mM-1·s-1) | Km (mM) | kcat (s-1) | kcat/Km (mM-1·s-1) | |
Wild type | 1.2 ± 0.1 | 164 ± 8 | 133± 5 | 0.2 ± 0.1 | 36 ± 2 | 176 ± 30 |
K78Q | 1.5 ± 0.1 | 117 ± 16 | 80 ± 7 | 1.2 ± 0.1 | 104± 6 | 89 ± 5 |
K104Q/K107Q | 1.2 ± 0.1 | 154 ± 6 | 131 ± 7 | 1.2 ± 0.1 | 157 ± 11 | 126 ± 9 |
K78Q/K104Q/K107Q | 1.3 ± 0.1 | 109 ± 10 | 82 ± 5 | 1.2 ± 0.1 | 109 ± 8 | 89 ± 9 |
aKinetic values and associated errors represent the average of at least five replicates and their standard deviation.