Tag
Trajectory Analysis
Molecular Modeling Salt Bridge Analysis in GROMACS: gmx saltbr vs pairdist Track a salt bridge across a GROMACS trajectory with gmx pairdist, compute its occupancy in Python, and learn why gmx saltbr misleads.… Dr. Abdul Rajjak Shaikh 13 min read Molecular Modeling gmx hbond for Protein-Ligand H-Bonds in GROMACS 2024+ Count protein-ligand hydrogen bonds with the new gmx hbond in GROMACS 2024+, or hbond-legacy. Copy the exact commands, get occupancy and read… Dr. Abdul Rajjak Shaikh 12 min read Molecular Modeling Ligand RMSD in GROMACS: Fit, Fix PBC, Read the Plot Calculate ligand RMSD in GROMACS the right way: fit on the protein backbone, fix periodic jumps first, and learn to read stable,… Dr. Abdul Rajjak Shaikh 11 min read Updated Molecular Modeling Wild-Type vs Mutant MD Simulation in GROMACS Design a wild-type versus mutant MD comparison in GROMACS that survives examination: matched protocol, replicas, and a difference you can defend. Dr. Abdul Rajjak Shaikh 16 min read Molecular Modeling Protein-Ligand Interaction Energy in GROMACS (Rerun Guide) Compute Coulomb and LJ protein-ligand interaction energy in GROMACS with energygrps, mdrun -rerun and gmx energy. Follow the exact commands. Dr. Abdul Rajjak Shaikh 13 min read Molecular Modeling How to Analyze a GROMACS Trajectory in Python with MDAnalysis: A Step-by-Step Guide for Beginners Load a GROMACS .tpr and .xtc into MDAnalysis, reproduce RMSD and RMSF in Python, and write the per-frame analysis no gmx tool… Dr. Abdul Rajjak Shaikh 20 min read Updated Molecular Modeling How to Analyze Protein Secondary Structure from a GROMACS Trajectory (gmx dssp): A Step-by-Step Guide Run gmx dssp on your GROMACS trajectory, read the .dat and .xvg outputs, and fix the "do_dssp not found" error that breaks… Dr. Abdul Rajjak Shaikh 13 min read Updated Molecular Modeling How to Use gmx cluster: Extract a Representative Structure from a GROMACS Trajectory Learn to run gmx cluster with the gromos method and pull one defensible representative structure from your GROMACS trajectory. Dr. Abdul Rajjak Shaikh 10 min read Updated Molecular Modeling How to Use gmx trjconv: Fix PBC and Extract Frames from a GROMACS Trajectory Learn the exact gmx trjconv commands to remove PBC artifacts, center your protein, strip water, and extract single frames before you run… Dr. Abdul Rajjak Shaikh 10 min read Updated Molecular Modeling How to Plot GROMACS Results in Python from .xvg Files (RMSD, RMSF and Energy) Parse GROMACS .xvg files in Python and plot RMSD, RMSF and energy with a reusable read_xvg function. Start making publication-ready figures today. Dr. Abdul Rajjak Shaikh 11 min read Updated