AMPS-NMR

AMPS-NMR refines NMR-derived protein structures using the AMBER suite through molecular dynamics and restrained simulations to incorporate experimental restraints and improve structural accuracy.

Key Features:

• Molecular Dynamics (AMBER): Employs the AMBER suite to perform molecular dynamics simulations using advanced force fields to optimize protein conformations.
• Restraint-Based Refinement (rMD): Performs restrained MD incorporating NMR-derived distance constraints, dihedral angle restrictions, and other conformational restraints.
• Protocol Selection and Customization: Supports predefined computational protocols and user-defined protocol customization for refinement workflows.
• AnteChamber Integration: Provides access to AnteChamber for calculating force field parameters for organic molecules to support protein–ligand studies.
• Explicit-Solvent Refinement: Demonstrated refinement of structures for multiple proteins in explicit water environments.

Scientific Applications:

• NMR structure refinement: Produces structures consistent with experimental NMR restraints while optimizing energetic quality.
• Protein–ligand modeling: Enables ligand parameterization and refinement of protein–ligand complexes using AnteChamber-derived parameters.
• Protein dynamics and interactions: Generates refined ensembles suitable for analysis of conformational variability, dynamics, and intermolecular interactions.

Methodology:

Inputs NMR-derived restraints and initial structural models, allows selection or customization of refinement protocols, executes restrained MD simulations with advanced AMBER force fields, and analyzes and outputs refined structures.