FESTA: A Polygon-Based Approach for Extracting Relevant Structures from Free Energy Surfaces Obtained in Molecular...

Area of Science:

• Computational Chemistry
• Molecular Dynamics Simulations
• Biophysics

Background:

• Enhanced sampling techniques generate complex free energy landscapes.
• Extracting meaningful equilibrium structures from these landscapes is computationally intensive.
• Current methods can be inefficient and difficult to implement.

Purpose of the Study:

• To develop an automated and efficient script for analyzing free energy surfaces.
• To streamline the extraction of equilibrium structures from simulation trajectories.
• To provide a general and portable tool for computational chemists.

Main Methods:

• Developed FESTA (Free Energy Surface Trajectory Analysis) script.
• Utilized connected-component labeling for identifying free energy minima.
• Implemented a Shapely-polygon-based approach for trajectory analysis.
• Incorporated automatic periodicity detection and multiprocessing for efficiency.

Main Results:

• FESTA successfully automates the extraction of equilibrium structures.
• The polygon-based method is significantly more efficient than traditional loop-based scripts.
• The script was benchmarked across three diverse systems, demonstrating its versatility.

Conclusions:

• FESTA offers a robust and user-friendly solution for analyzing free energy simulations.
• The automated approach reduces manual effort and potential errors.
• This tool enhances the efficiency of molecular structure analysis in computational studies.