Table 2.
ITC binding constants for OTS964 binding CDKs
| CDK | N (sites) | KD (nM) | ΔG (kcal/mol) | ΔH (kcal/mol) | ΔS (cal/mol/K) |
|---|---|---|---|---|---|
|
| |||||
| CDK11 | |||||
| Wild-type | 0.882 | 65.4 ± 18.0 | −9.82 ± 0.16 | −9.33 ± 0.27 | 1.62 ± 0.35 |
| Gly223Ser | 1.12 | 853 ± 56 | −8.28 ± 0.04 | −5.93 ± 0.16 | 7.89 ± 0.42 |
| Gly223Ala (G223A) | 0.668 | 31.7 ± 13.8 | −10.4 ± 0.3 | −11.4 ± 0.4 | −3.65 ± 2.14 |
| Glu89Gly (E89G) | 0.882 | 50.9 ± 3.3 | −9.95 ± 0.79 | −9.82 ± 0.42 | 0.455 ± 1.27 |
| Met160Phe (M160F) | 0.794 | 556 ± 26 | −8.29 ± 0.32 | −8.13 ± 0.26 | 0.540 ± 1.94 |
| G223A/E89G/M160F | 0.616 | 320 ± 66 | −8.87 ± 0.12 | −9.89 ± 0.24 | −3.42 ± 1.21 |
| CDK2 | |||||
| Wild-type | 0.704 | 16300 ± 1700 | −6.54 ± 0.06 | −9.12 ± 0.60 | −8.66 ± 1.80 |
| Gly11Glu (G11E) | 0.866 | 6820 ± 530 | −7.05 ± 0.05 | −9.45 ± 0.32 | −8.05 ± 1.23 |
| Phe80Met (F80M) | 0.804 | 32400 ± 1900 | 17.5 ± 0.6 | 11.8 ± 0.3 | −19.1 ± 1.1 |
| Ala144Gly (A144G) | 0.554 | 16000 ± 4600 | −6.56 ± 0.17 | −10.6 ± 1.2 | −13.4 ± 4.5 |
| CDK2-cyclin AWT | |||||
| Wild-type | 1.00 | 1820 ± 500 | −7.85 ± 0.18 | −8.64 ± 1.06 | −2.64 ± 2.99 |
| Gly11Glu (G11E) | 1.16 | 621 ± 16 | −8.47 ± 0.02 | −7.13 ± 0.21 | 4.48 ± 0.76 |
| Phe80Met (F80M) | 1.28 | 4980 ± 440 | −7.24 ± 0.05 | −9.69 ± 0.08 | −8.23 ± 0.44 |
| Ala144Gly (A144G) | 1.04 | 3030 ± 150 | −7.53 ± 0.03 | −6.92 ± 0.01 | 2.04 ± 0.11 |
Data represents the mean ± standard deviation (SD) of two replicate experiments.