Robosample: A rigid-body molecular simulation program based on robot mechanics
Laurentiu Spiridon1, Teodor Asvadur Şulea1, David D L Minh2
1Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, Bucharest 060031, Romania.
Biochimica Et Biophysica Acta. General Subjects
|April 17, 2020
Summary
Robosample software accelerates biomolecular simulations using constrained dynamics, enabling efficient conformational sampling. This method significantly enhances sampling efficiency for large molecules compared to traditional approaches.
Area of Science:
- Computational Biology
- Molecular Dynamics Simulations
- Biophysics
Background:
- Constrained molecular dynamics (MD) methods offer potential computational cost reduction over all-atom MD by allowing larger time steps.
- Improving constrained MD algorithms is crucial for enhancing configuration space sampling in molecular simulations.
Purpose of the Study:
- Introduce Robosample, a software package for high-performance constrained dynamics algorithms.
- Apply robotics-derived algorithms to biomolecular system simulations for efficient sampling.
Main Methods:
- Robosample implements Constrained Dynamics Hamiltonian Monte Carlo (CDHMC) as a Gibbs sampling move.
- Includes Cartesian, torsional, spherical, and cylindrical joint dynamics moves for flexible coordinate manipulation.
- Allows user distribution of joints along the molecule for customized simulations.
Main Results:
- Mixing flexible dynamics with torsional, cylindrical, or spherical moves recovers the free energy surface in alanine dipeptide simulations.
- Ramachandran dynamics accelerate the slowest transition by an order of magnitude.
- Simulations of complex glycans cover larger configuration spaces when combined with constrained dynamics.
Conclusions:
- Robosample is a valuable tool for efficient conformational sampling of large biomolecules.
- Provides a user-friendly package for fast biomolecular sampling without requiring deep expertise in specialized mechanics or statistical mechanics.
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