TABLE 2.
Apparent kcat values of ToMO and ToMO mutant proteins on benzene, toluene, o-xylene, and naphthalene
| ToMO variant or mutation(s) |
kcat (s−1)a for substrate:
|
||||
|---|---|---|---|---|---|
| Phenol | Benzene | Toluene | o-Xylene | Naphthalene | |
| Wild type | 1.0 | 0.37 | 0.43 | 0.26 | 0.033 |
| I100A | 0.019 | 0.05 | 0.03 | 0.025 | 0.0015 |
| I100V | 0.4 | 0.22 | 0.27 | 0.19 | 0.011 |
| I100M | 0.35 | 0.14 | 0.18 | 0.078 | |
| I100L | 0.76 | 0.3 | 0.56 | 0.3 | |
| I100F | 0.15 | 0.13 | 0.3 | 0.16 | |
| I100W | 0 | 0.018 | Very low | Very low | |
| F176I | 0.25 | 0.43 | 0.28 | 0.21 | 0.016 |
| F176L | 0.32 | 0.36 | 0.32 | 0.23 | 0.016 |
| A107V | 0.07 | 0.064 | 0.024 | 0.032 | |
| A107I | 0.027 | 0.0017 | 0.0009 | 0.0005 | |
| F205L | 0.01 | 0.0015 | 0.00094 | 0.0006 | |
| E103G | 1.0 | 0.43 | 0.42 | 0.42 | |
| E103L | 0.89 | 0.29 | 0.32 | 0.36 | |
| E103 M | 0.29 | 0.26 | 0.3 | 0.2 | |
| E103V | 0.24 | 0.22 | 0.22 | 0.11 | |
| E103I | 0.21 | 0.03 | 0.03 | 0.01 | |
| E103G, I100L | 0.53 | 0.58 | 0.67 | 0.75 | |
| E103V, I100V | 0.30 | 0.11 | 0.097 | 0.029 | |
| E103G, M180I | 0.50 | 0.22 | 0.34 | 0.2 | |
Standard errors for kcat values were <20% for phenol and <25% for benzene, toluene, o-xylene, and naphthalene.