Summary Molecular surfaces QM properties presented on surface Compound screening Pattern matching on surfaces Martin Swain Critical features Dave Whitley Data reduction and QSAR Brian Hudson Spherical harmonic representation Dave Ritchie

Future directions High-throughput ligand docking –Superimposition of ligand and a “negative” of the receptor –Scoring function development Use of the fields to drive simulation –Use of the fields to derive intermolecular forces –Rigid-body motions – long time-step MD, or Monte Carlo –Anisotropic atomic representations –Free energy calculations Conformational dependence and modelling

Future directions Spherical harmonics –3D database searching – including fragment matching –Binding site identification Ligand building from the surface properties New descriptors –Use of expansion coefficients as properties –Higher moments Further development of critical points and pattern matching Further quantum mechanical developments

A hierarchy of methods Rapid screening using computationally fast approaches –3D fields – Cresset On reduced set: –Semi-empirical property calculations and alignments –Low dimensionality spherical harmonics On most interesting molecules: –Higher order theory –Large harmonic expansions More accurate molecular representations are used as appropriate, as resources allow