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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Dror, Ron O. Pan, Albert C. Shaw, David E. Arlow, Daniel H. Shan, Yibing Borhani, David W. Maragakis, Paul Xu, Huafeng |
| Description | Author Affiliation: Dror RO ( DE Shaw Research, New York, NY 10036, USA. Ron.Dror@DEShawResearch.com); |
| Abstract | How drugs bind to their receptors--from initial association, through drug entry into the binding pocket, to adoption of the final bound conformation, or 'pose'--has remained unknown, even for G-protein-coupled receptor modulators, which constitute one-third of all marketed drugs. We captured this pharmaceutically critical process in atomic detail using the first unbiased molecular dynamics simulations in which drug molecules spontaneously associate with G-protein-coupled receptors to achieve final poses matching those determined crystallographically. We found that several beta blockers and a beta agonist all traverse the same well-defined, dominant pathway as they bind to the ß(1)- and ß(2)-adrenergic receptors, initially making contact with a vestibule on each receptor's extracellular surface. Surprisingly, association with this vestibule, at a distance of 15 â « from the binding pocket, often presents the largest energetic barrier to binding, despite the fact that subsequent entry into the binding pocket requires the receptor to deform and the drug to squeeze through a narrow passage. The early barrier appears to reflect the substantial dehydration that takes place as the drug associates with the vestibule. Our atomic-level description of the binding process suggests opportunities for allosteric modulation and provides a structural foundation for future optimization of drug-receptor binding and unbinding rates. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 32 |
| Volume Number | 108 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2011-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Pharmaceutical Preparations Receptors, Adrenergic, Beta-1 Metabolism Receptors, Adrenergic, Beta-2 Signal Transduction Alprenolol Chemistry Binding Sites Crystallography, X-Ray Desiccation Extracellular Space Molecular Dynamics Simulation Protein Binding Thermodynamics Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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