SAAMBE

SAAMBE predicts changes in protein–protein binding free energy induced by single amino acid substitutions using a modified MM-PBSA protocol.

Key Features:

• Modified MM-PBSA Energy Calculation: Estimates mutation-induced binding free energy changes (ΔΔG) using a fast Molecular Mechanics Poisson-Boltzmann Surface Area (MM-PBSA) approach optimized on over 1,300 experimental measurements.
• Energy Component Decomposition: Reports total binding free energy changes and corresponding energetic components, enabling detailed analysis of mutation effects on protein–protein interfaces.

Scientific Applications:

• Missense Mutation and Protein Engineering Analysis: Assesses the impact of amino acid substitutions on protein–protein interactions to distinguish disease-associated mutations and guide protein design.

Methodology:

SAAMBE applies a modified MM-PBSA framework to structural coordinate data, computes binding free energies for wild-type and mutant complexes, and derives ΔΔG values by comparing energy-minimized structures, validated against experimentally determined binding free energy changes.