Abstract
Ligand-based pharmacophore modeling require relatively long lists of active compounds, while a pharmacophore based on a single ligand-receptor crystallographic structure is often promiscuous. These problems prompted us to combine molecular dynamics (MD) simulation with ligand-receptor contacts analysis as means to develop valid pharmacophore model(s). The particular ligand-receptor complex is allowed to perturb over a few nano-seconds using MD simulation. Subsequently, ligand-receptor contact points (≤2.5 Å) are identified. Ligand-receptor contacts maintained above certain threshold during molecular dynamics simulation are considered critical and used to guide pharmacophore development. We termed this method as Molecular-Dynamics Based Ligand-Receptor Contact Analysis. We implemented this new methodology to develop valid pharmacophore models for check point kinase 1 (Chk1) and beta-secretase 1 (BACE1) inhibitors as case studies. The resulting pharmacophore models were validated by receiver operating characteristic curved analysis against inhibitors obtained from CHEMBL database.
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Acknowledgments
The authors would like to thank IMAN1 Center—Jordan’s National Supercomputing Center—for providing us with the computational tools and high-performance computing system time to perform our experiments; the authors are deeply indebted to Eng. Zaid Abudayyeh from IMAN1 Center for his help in performing this project.
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Hatmal, M.M., Jaber, S. & Taha, M.O. Combining molecular dynamics simulation and ligand-receptor contacts analysis as a new approach for pharmacophore modeling: beta-secretase 1 and check point kinase 1 as case studies. J Comput Aided Mol Des 30, 1149–1163 (2016). https://doi.org/10.1007/s10822-016-9984-2
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DOI: https://doi.org/10.1007/s10822-016-9984-2