EspcTM: Kinetic Transition Network Based on Trajectory Mapping in Effective Energy Rescaling Space

Frontiers in Molecular Biosciences
Zhenyu WangGuanghong Zuo

Abstract

The transition network provides a key to reveal the thermodynamic and kinetic properties of biomolecular systems. In this paper, we introduce a new method, named effective energy rescaling space trajectory mapping (EspcTM), to detect metastable states and construct transition networks based on the simulation trajectories of the complex biomolecular system. It mapped simulation trajectories into an orthogonal function space, whose bases were rescaled by effective energy, and clustered the interrelation between these trajectories to locate metastable states. By using the EspcTM method, we identified the metastable states and elucidated interstate transition kinetics of a Brownian particle and a dodecapeptide. It was found that the scaling parameters of effective energy also provided a clue to the dominating factors in dynamics. We believe that the EspcTM method is a useful tool for the studies of dynamics of the complex system and may provide new insight into the understanding of thermodynamics and kinetics of biomolecular systems.

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Methods Mentioned

BETA
PCA
protein folding

Software Mentioned

pyEMMA
EspcTM
Gromacs package
DSSP
TM
MSM

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