APBScore

APBScore evaluates molecular interactions between receptors and ligands to estimate binding affinity in protein–ligand complexes using pairwise van der Waals (VDW), electrostatic, and hydrogen-bond energy terms.

Key Features:

• Physical-Based Scoring Function: Incorporates pairwise van der Waals (VDW) forces, electrostatic interactions, and hydrogen-bond energies to score receptor–ligand complexes.
• Performance on Benchmark Datasets: Testing shows APBScore performs well across benchmark datasets and ranks highly in scenarios involving zinc/ligand complexes.
• Ranking and Docking Capabilities: Provides ranking of potential ligands and supports docking evaluations, outperforming several traditional scoring functions in benchmark comparisons.
• Sensitivity to Atomic Collisions: Identifies decoy structures exhibiting receptor/ligand atomic collisions to flag sterically unfavorable configurations.
• Optimization and Structural Minimization: Uses optimized atom-pair VDW parameters and structural minimization of initial complexes to refine energy estimates.
• Specialized Treatment of Zinc/Ligand Interactions: Implements specific optimizations for zinc/ligand interactions to improve scoring of metalloprotein complexes.

Scientific Applications:

• Virtual Screening: Ranks large ligand libraries in virtual screening campaigns to identify promising candidates.
• Docking Simulations: Aids docking simulations by evaluating binding poses and discriminating decoys from plausible complexes.
• Drug Discovery and Rational Design: Supports lead identification and rational design of therapeutics by estimating binding affinities.
• Metalloprotein Studies: Facilitates analysis of metalloproteins through specialized scoring of zinc/ligand complexes.

Methodology:

Calculates atom-pair interaction energies (pairwise VDW, electrostatics, and hydrogen-bond energies), detects receptor/ligand atomic collisions, and refines scores via structural minimization with optimized atom-pair VDW parameters and specific optimizations for metal‑ligand (zinc) interactions.