MotiveValidator

MotiveValidator validates ligand and residue annotations in PDB and PDBx/mmCIF structure files by comparing topology and stereochemistry to reference models.

Key Features:

• Annotation validation: Compares ligand and residue annotations against reference models with known topology and stereochemistry to identify discrepancies.
• File format support: Accepts PDB and PDBx/mmCIF formatted structure files for validation.
• High-throughput processing: Processes thousands of ligands or residues in a single run, typically completing validations within minutes.
• Comprehensive reporting: Produces tabular and graphical outputs and provides explicit descriptions of differences between submitted annotations and reference models.

Scientific Applications:

• Binding site analysis: Ensures ligand and residue annotations accurately represent interactions at binding sites.
• Docking studies: Verifies annotations to support reliable docking simulations and interaction predictions.
• Virtual screening: Confirms that ligands used in large-scale virtual screening are represented with correct topology and stereochemistry.

Methodology:

MotiveValidator compares user-submitted PDB or PDBx/mmCIF structures against established reference models, evaluates whether topology and stereochemistry match the expected 3-letter ligand or residue code, and reports explicit descriptions of any discrepancies.