Parametrization of an Orbital-Based Linear-Scaling Quantum Force Field for Noncovalent Interactions.

ABSTRACT: We parametrize a linear-scaling quantum mechanical force field called mDC for the accurate reproduction of nonbonded interactions. We provide a new benchmark database of accurate ab initio interactions between sulfur-containing molecules. A variety of nonbond databases are used to compare the new mDC method with other semiempirical, molecular mechanical, ab initio, and combined semiempirical quantum mechanical/molecular mechanical methods. It is shown that the molecular mechanical force field significantly and consistently reproduces the benchmark results with greater accuracy than the semiempirical models and our mDC model produces errors twice as small as the molecular mechanical force field. The comparisons between the methods are extended to the docking of drug candidates to the Cyclin

SUBMITTER: Giese TJ 

PROVIDER: S-EPMC3985928 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature