title: A QXP-based multistep docking procedure for accurate prediction of protein-ligand complexes.
abstract: The two great challenges of the docking process are the prediction of ligand poses in a protein binding site and the scoring of the docked poses. Ligands that are composed of extended chains in their molecular structure display the most difficulties, predominantly because of the torsional flexibility. On the basis of the molecular docking program QXP-Flo+0802, we have developed a procedure particularly for ligands with a high degree of rotational freedom that allows the accurate prediction of the orientation and conformation of ligands in protein binding sites. Starting from an initial full Monte Carlo docking experiment, this was achieved by performing a series of successive multistep docking runs using a local Monte Carlo search with a restricted rotational angle, by which the conformational search space is limited. The method was established by using a highly flexible acetylcholinesterase inhibitor and has been applied to a number of challenging protein-ligand complexes known from the literature.
authors.affiliation: Department of Chemistry, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany.
authors.forename: Laleh
authors.initials: L
authors.lastname: Alisaraie
authors.forename: Lars A
authors.initials: LA
authors.lastname: Haller
authors.forename: Gregor
authors.initials: G
authors.lastname: Fels
mesh_terms: D001665:Binding Sites; D008024:Ligands; D008958:Models, Molecular; D009010:Monte Carlo Method; D011506:Proteins / Q000378:metabolism*
chemical_list: D008024:Ligands; D011506:Proteins