Paper Citing NAMD - Abstract
Arrar, Mehrnoosh; de Oliveira, Cesar Augusto F.; Fajer, Mikolai; Sinko, William; McCammon, J. Andrew
w-REXAMD: A Hamiltonian Replica Exchange Approach to Improve Free Energy Calculations for Systems with Kinetically Trapped Conformations
JOURNAL OF CHEMICAL THEORY AND COMPUTATION, 9:18-23, JAN 2013
Free energy governs the equilibrium extent of many biological processes. High barriers separating free energy minima often limit the sampling in molecular dynamics (MD) simulations, leading to inaccurate free energies. Here, we demonstrate enhanced sampling and improved free energy calculations, relative to conventional MD, using windowed accelerated MD within a Hamiltonian replica exchange framework (w-REXAMD). We show that for a case in which multiple conformations are separated by large free energy barriers, w-REXAMD is a useful enhanced sampling technique, without any necessary reweighting.
