CHARMM: the biomolecular simulation program.

Area of Science:

• Computational chemistry and molecular modeling.
• Biophysics and structural biology.
• Materials science and condensed matter physics.

Background:

• CHARMM (Chemistry at HARvard Molecular Mechanics) is a long-standing, widely adopted molecular simulation program.
• Developed over three decades, it primarily targets molecules of biological interest, including proteins, nucleic acids, and lipids.
• Its versatility extends to various environments like solutions, crystals, and membranes.

Purpose of the Study:

• To provide a comprehensive overview of the CHARMM program as it stands today.
• To highlight key developments and advancements in CHARMM since its initial publication in 1983.
• To showcase the program's extensive capabilities for molecular simulation and analysis.

Main Methods:

• Utilizes a broad suite of computational tools for conformational and path sampling.
• Incorporates methods for free energy estimation, molecular minimization, and dynamics.
• Supports various energy functions and models, including QM/MM, all-atom classical, and implicit solvent models.

Main Results:

• CHARMM offers extensive capabilities for studying biological molecules and broader many-particle systems.
• The program supports diverse simulation approaches, from explicit solvent to implicit membrane models.
• It is available on numerous platforms, supporting both serial and parallel computing architectures.

Conclusions:

• CHARMM remains a powerful and adaptable tool for molecular simulation across various scientific disciplines.
• Continuous development ensures its relevance for cutting-edge research in computational chemistry and biology.
• Its broad applicability and extensive feature set make it invaluable for complex system analysis.