Numeric analysis of reversibility of classic movement equations and constructive criteria of estimating quality of molecular dynamic simulations.

The fundamental criteria of the quality of molecular dynamics (MD) simulation represent a pivotal challenge, especially in the case of MD simulations of large systems (in particular, proteins).This work presents a simple theoretical analysis of time reversibility in classical mechanics that has allowed us to formulate a number of constructive criteria for evaluating the quality of the trajectories, generated in MD simulations. The results of testing the criteria on the structures of eight small proteins are presented. The criteria can be useful for solving different MD problems, such as: choosing the most appropriate thermostats for a MD system under study, the methods for sampling conformations, etc.Communicated by Ramaswamy H. Sarma.