Title: Understanding Electrostatics: Beyond the Poisson-Boltzmann view
Electrostatics plays an important role in stabilizing a molecule.
In implicit solvent models, the electric field generated by a molecule
is obtained as a solution of the Poisson-Boltzmann equation (PBE), a second order
elliptic equation solved over the whole space within and around the molecule.
Analytical solutions of this equation are not available for large molecules.
Numerical solutions are usually obtained using finite difference methods on regular
meshes. In the first part of the talk, I will describe a new PBE solver,
In the second part of the talk, I will describe a new way to calculate the
electrostatics properties of macromolecules that goes beyond the classical PBE.
The solvent region is no longer modeled as an homogeneous dielectric media
but rather as an assembly of self-orienting dipoles of variable density.
This new model unifies the Poisson-centric view and the Langevin dipole model,
yielding a Generalized Poisson-Boltzmann Langevin (GPBL) equation.