Table 2. Vmax and Km values and inhibition patterns of PEPCK-C isoenzymes in the presence of glyceroneogenic substrates and compound 1.
[Compound 1] (μM) | OAA | GTP | |||
---|---|---|---|---|---|
Vmax (μmol min-1 mg-1) | Km (μM) | Vmax (μmol min-1 mg-1) | Km (μM) | ||
139Met | 0 μM | 21.3 ± 3.7 | 22 ± 14 | 20.0 ± 1.9 | 96 ± 15 |
139Met | 50 μM | 6.7 ± 1.4 | 13 ± 5 | 7.8 ± 0.5 | 118 ± 14 |
139Leu | 0 μM | 21.8 ± 1.8 ns | 14 ± 4 ns | 22.5 ± 4.2 ns | 99 ± 14 ns |
139Leu | 50 μM | 9.4 ± 1.3 ns | 11 ± 3 ns | 7.2 ± 0.4 ns | 155 ± 30 ns |
Values given are the mean of three independent experiments ± SD. Differences in Vmax and Km between 139Met and 139Leu were calculated using two-sample t-test; ns: not significant.