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PTRAJ and CPPTRAJ: Software for Processing and Analysis of Molecular Dynamics Trajectory Data.

Daniel R Roe1, Thomas E Cheatham1

  • 1Department of Medicinal Chemistry, College of Pharmacy, 2000 South 30 East Room 105, University of Utah, Salt Lake City, Utah 84112, United States.

Journal of Chemical Theory and Computation
|November 20, 2015
PubMed
Summary
This summary is machine-generated.

PTRAJ and CPPTRAJ are free, portable computer programs for analyzing atomic position data from molecular dynamics simulations. These tools offer various functions for processing and analyzing trajectory data, enhancing molecular modeling research.

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Area of Science:

  • Computational Chemistry
  • Molecular Dynamics Simulations
  • Bioinformatics

Background:

  • Accurate analysis of molecular dynamics (MD) trajectories is crucial for understanding biological processes at the atomic level.
  • Existing tools may lack comprehensive features or user-friendliness for processing complex MD data.
  • The development of specialized software is essential for efficient and reliable trajectory analysis.

Purpose of the Study:

  • To introduce and describe PTRAJ and its successor, CPPTRAJ, as powerful, freely available software for analyzing 3D atomic coordinate trajectories.
  • To detail the extensive functionalities offered by these programs for data manipulation, processing, and analysis.
  • To highlight the improvements and new features introduced in CPPTRAJ.

Main Methods:

  • Description of the design and architecture of PTRAJ and CPPTRAJ.
  • Explanation of common data processing tasks, including format conversion, ensemble processing, and system manipulation.
  • Overview of analytical capabilities such as RMS fitting, distance measurements, B-factor calculation, radius of gyration, and correlation functions.

Main Results:

  • PTRAJ and CPPTRAJ provide a comprehensive suite of tools for diverse trajectory analysis needs.
  • The programs support manipulation and analysis of large datasets, including those from ensemble methods like replica exchange molecular dynamics.
  • CPPTRAJ offers algorithmic enhancements and new features over its predecessor, PTRAJ.

Conclusions:

  • PTRAJ and CPPTRAJ are valuable, accessible resources for the molecular dynamics community.
  • These programs facilitate in-depth analysis of atomic positional data, aiding scientific discovery.
  • The continued development, exemplified by CPPTRAJ, ensures these tools remain relevant for advanced molecular simulations.