Screened Coulomb potentials implicit solvent model

SCP-ISM, or screened Coulomb potentials implicit solvent model, is a continuum approximation of solvent effects for use in computer simulations of biological macromolecules, such as proteins and nucleic acids, usually within the framework of molecular dynamics.^[1] It is based on the classic theory of polar liquids, as developed by Peter Debye and corrected by Lars Onsager to incorporate reaction field effects.^[1] The model can be combined with quantum chemical calculations to formally derive a continuum model of solvent effects suitable for computer simulations of small and large molecular systems. The model is included in the CHARMM molecular mechanics code.^[2]