Table 1.
Thermodynamic parameters for the binding of wildtype DB domain (DB_WT) of EGR1 to DNA at pH 7 and 25°C under various NaCl concentrations
[NaCl] / mM | Kd / nM | ΔH / kcal.mol−1 | TΔS / kcal.mol−1 | ΔG / kcal.mol−1 |
---|---|---|---|---|
0 | 271 ± 35 | −26.70 ± 0.61 | −17.72 ± 0.69 | −8.97 ± 0.08 |
100 | 314 ± 39 | −19.01 ± 0.17 | −10.13 ± 0.24 | −8.88 ± 0.07 |
200 | 266 ± 66 | −16.32 ± 0.16 | −7.33 ± 0.31 | −8.99 ± 0.15 |
300 | 421 ± 49 | −14.27 ± 0.15 | −5.57 ± 0.22 | −8.71 ± 0.07 |
400 | 2441 ± 325 | −14.20 ± 0.72 | −6.54 ± 0.64 | −7.67 ± 0.08 |
500 | 10119 ± 1228 | −12.99 ± 0.37 | −6.17 ± 0.44 | −6.82 ± 0.07 |
The binding stoichiometries to the fits agreed to within ±10%. Errors were calculated from at least three independent measurements. All errors are given to one standard deviation.