Table 2. Kinetic Parameters for LeFPPS1.
The enzyme reaction products were quantitated by UPLC-MS analysis. Data are shown as means ± SD of three technical replicates. Asterisk indicates the value calculated from near detection limit of UPLC-MS analysis because of the high affinity of LeFPPS1 to GPP.
Substrate | LeFPPS1 | ||
---|---|---|---|
Km (µm) | kcat (min−1) | kcat/Km (μm−1⋅min−1) | |
DMAPP (at 100 µm IPP) | 2.20 ± 0.48 | 3.48 ± 0.21 | 1.58 ± 0.25 |
GPP (at 100 µm IPP) | 0.10 ± 0.03* | 2.49 ± 0.04 | 26.14 ± 9.65 |
IPP (at 60 µm DMAPP) | 3.03 ± 0.91 | 3.90 ± 0.67 | 1.29 ± 0.16 |