APBS was designed as a software package for modeling biomolecular solvation through solution of the Poisson-Boltzmann equation or PBE.PBE is one of the most popular continuum models for describing electrostatic interactions between molecular solutes in salty, aqueous media.
Continuum electrostatics plays an important role in several areas of biomolecular simulation, including:
- simulation of diffusional processes to determine ligand-protein and protein-protein binding kinetics,
- implicit solvent molecular dynamics of biomolecules,
- solvation and binding energy calculations to determine ligand-protein and protein-protein equilibrium binding constants and aid in rational drug design,
- and biomolecular titration studies.
PBS was designed to efficiently evaluate electrostatic properties for such simulations for a wide range of length scales to enable the investigation of molecules with tens to millions of atoms.
We also provide implicit solvent models of nonpolar solvation which accurately account for both repulsive and attractive solute-solvent interactions.
Download APBS 1.3 Here
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