AQUA

AQUA validates biomolecular structures determined by Nuclear Magnetic Resonance (NMR) spectroscopy by assessing geometry and restraint violations to quantify model quality.

Key Features:

• Geometry Validation: Assesses geometric properties of protein structures by comparing modeled geometry to expectations derived from NMR spectroscopy.
• Restraint Violations Analysis: Evaluates distance and angle restraint violations to identify discrepancies between models and experimental NMR restraints.
• Detailed Output Reports: Produces comprehensive reports with restraint violation breakdowns, summary statistics, and plots generated in PostScript format.
• Support for NMR Structure Determination: Provides continuous assessment usable during ongoing NMR structure determination to guide model refinement.
• Final Validation Tool: Performs final validation of NMR-derived structures to ensure they meet accuracy standards prior to publication or further application.

Scientific Applications:

• Protein Structure Research: Validates protein models to support studies of protein structure, function, and interactions.
• Drug Design and Development: Ensures reliability of NMR-derived structural models used in rational drug design and therapeutic development.
• Structural Biology Education: Provides detailed validation feedback useful for teaching NMR structure determination and validation.

Methodology:

Integrates experimental NMR data with computational analyses, evaluates modeled structures against NMR-derived distance and angle restraints, and generates quantitative assessments, visualizations, and statistical summaries.