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. Author manuscript; available in PMC: 2014 Mar 7.
Published in final edited form as: J Phys Chem B. 2013 Feb 25;117(9):2653–2661. doi: 10.1021/jp3117227

Table 1.

Comparison of pKa values, hill coefficients, and p-values obtained from 1H NMR experiments and CpHMD simulations. Standard deviations are shown in parantheses. For pKaAVG, standard deviations were obtained by splitting each simulation trajectory into three 20 ns sub-trajectories.

NMR Constant pH MD
pKa, HH Hill Coeff. p-value pKaAVG pKaHH Hill Coeff. p-value
MII His9 6.61 1.22 0.84 6.54 (0.08) 6.63 0.9 0.93
Glu11 --- --- --- 4.31 (0.03) 4.28 0.95 0.81
His12 6.52 0.82 0.74 6.74 (0.05) 6.83 0.88 0.85

MII-E11A His9 6.48 0.82 0.85 6.24 (0.24) 5.83 0.95 0.89
His12 6.80 0.84 0.84 6.39 (0.11) 6.15 1.19 0.66

MII-N5R:E11A:H12K His9 5.77 0.87 0.92 5.99 (0.32) 5.94 0.98 0.94
Lys12 --- --- --- 10.23 (0.07) 10.17 0.98 0.79

MAD --- --- --- 0.2 (0.1) 0.4 (0.3)