RapidRMSD

RapidRMSD computes root mean square deviations (RMSDs) for flexible molecules using a reduced set of collective motions to enable rapid comparison and analysis of molecular conformations.

Key Features:

• Flexibility Modeling: Models molecular flexibility via a reduced set of collective motions derived from normal modes or principal component analysis (PCA).
• Initialization Complexity: Algorithm initialization scales linearly with the number of atoms.
• Evaluation Complexity: Subsequent RMSD evaluations depend only on the selected collective motions rather than all atoms, lowering per-evaluation cost.
• Computational Performance: Reduces computation time compared to traditional atom-wise RMSD methods that scale linearly with atom count.
• Ensemble Generation: Generates pseudo-random constant-RMSD structural ensembles for use in cross-docking studies.

Scientific Applications:

• Molecular Docking: Aids assessment of docking predictions and supports cross-docking studies through rapid flexible-molecule RMSD calculations and constant-RMSD ensembles.
• Clustering of Molecular Conformations: Enables clustering of spatially proximate conformations by providing fast RMSD evaluations based on collective motions.
• Molecular Dynamics Analysis: Supports clustering and analysis of MD trajectories to study conformational changes over time.

Methodology:

Uses a reduced set of collective motions derived from normal modes or PCA; algorithm initialization is linear in the number of atoms; RMSD evaluations depend solely on the selected collective motions.