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Modeling an Enzyme Active Site using Molecular Visualization Freeware

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CHARMM-GUI PDB Manipulator: Various PDB Structural Modifications for Biomolecular Modeling and Simulation.

Sang-Jun Park¹, Nathan Kern¹, Turner Brown¹

¹Departments of Biological Sciences, Chemistry, Bioengineering, and Computer Science and Engineering, Lehigh University, Bethlehem, PA 18015, USA.

Journal of Molecular Biology

|June 25, 2023

Summary

CHARMM-GUI

Keywords:

all-atom modeling molecular dynamics simulation nonstandard amino acid/RNA post translational modifications ubiquitylation/SUMOylation

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Area of Science:

Biomolecular modeling and simulation
Computational chemistry
Structural biology

Background:

Molecular modeling and simulation offer crucial molecular-level insights into biological functions.
CHARMM-GUI is a widely adopted web-based tool for generating molecular simulation systems and input files.
PDB Manipulator within CHARMM-GUI facilitates PDB file modifications for simulations.

Purpose of the Study:

To detail recent enhancements to CHARMM-GUI's PDB Manipulator module.
To showcase new functionalities for complex biomolecular system preparation.
To simplify advanced molecular simulation setup for researchers.

Main Methods:

The study focuses on describing new features implemented in PDB Manipulator.
These include modifications for non-standard amino acids/RNA, ubiquitylation, SUMOylation, lipidation, and peptide stapling.
Improved parameterization for small molecules is also discussed.

Main Results:

Recent additions significantly expand the capabilities of PDB Manipulator.
Complex modifications like post-translational modifications and peptide stapling are now more accessible.
Enhanced parameterization options improve the accuracy of small molecule simulations.

Conclusions:

The updated PDB Manipulator in CHARMM-GUI simplifies the preparation of complex biomolecular systems for simulation.
These advancements facilitate advanced molecular modeling and simulation studies in biomedical research.
The new features lower the barrier for utilizing sophisticated simulation techniques.