Active site calculations of neurotransmitters
In this line of research we are studying the conformational diversity of several neurotransmitters in solution, including acetycholine, nicotine and muscarine. By predicting the energies of the various conformers using quantum mechanics and implicit solvent molecules, we aim to better understand their interaction with receptors. We can predict critical bond distances and thus identify whether certain conformers are bioactive. Comparing these predictions with the limited experimental data available for some of the neurotransmitters allows us to make meaningful predictions when experimental data is not yet available.
References
1. Munoz-Caro, C.; Nino, A.; Mora, M.; Reyes, S.; Melendez, F. J.; Castro, M. E. Conformational population distribution of acetylcholine, nicotine and muscarine in vacuum and solution. Journal of Molecular Structure: THEOCHEM 2005, 726, 115–124.
2. Seydou, M.; Grégoire, G.; Liquier, J.; Lemaire, J.; Schermann, J. P.; Desfrançois, C. Experimental Observation of the Transition between Gas-Phase and Aqueous Solution Structures for Acetylcholine, Nicotine, and Muscarine Ions. Journal of the American Chemical Society 2008, 130, 4187–4195.
3. Barone, V.; Cossi, M.; Tomasi, J. A new definition of cavities for the computation of solvation free energies by the polarizable continuum model. Journal of Chemical Physics 1997, 107(8), 3210-3221.
4. Marenich, A. V.; Olson, R. M.; Kelly, C. P.; Cramer, C. J.; Truhlar, D. G., "Self-Consistent Reaction Field Model for Aqueous and Nonaqueous Solutions Based on Accurate Polarized Partial Charges," Journal of Chemical Theory and Computation 2007, 3, 2011-2033.

