Absolute FKBP binding affinities obtained via non-equilibrium unbinding simulations

Details Absolute FKBP binding affinities obtained via non-equilibrium unbinding simulations Absolute FKBP binding affinities obtained via non-equilibrium unbinding simulations

2007-10-26

arxiv.org/abs/0710.5132v3

Physics

Biological Physics

9 pages, 3 figures (no necessary color). Changes made to methodology and results between revisions

Scientific paper

We compute absolute binding affinities for two ligands bound to the FKBP protein using non-equilibrium unbinding simulations. The methodology is straight-forward, requiring little or no modification to many modern molecular simulation packages. The approach makes use of a physical pathway, eliminating the need for complicated alchemical decoupling schemes. Results of this study are promising. For the ligands studied here the binding affinities are typically estimated within less than 4.0 kJ/mol of the target values; and the target values are within less than 1.0 kJ/mol of experiment. These results suggest that non-equilibrium simulation could provide a simple and robust means to estimate protein-ligand binding affinities.

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