期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 28, 页码 8008-8012出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602729
关键词
G-protein coupled receptors; hormones; metadynamics; molecular dynamics; receptors
资金
- Deutsche Forschungsgemeinschaft [GK1910]
- European Union project Peptide Research Network of Excellence PeReNE as part of the Interreg IVA France (Channel)-England program (Interreg EU)
- EPSRC [EP/ M013898/1]
- EPSRC [EP/M013898/1, EP/M022609/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M013898/1, EP/M022609/1] Funding Source: researchfish
Molecular-dynamics simulations with metadynamics enhanced sampling reveal three distinct binding sites for arginine vasopressin (AVP) within its V-2-receptor (V2R). Two of these, the vestibule and intermediate sites, block (antagonize) the receptor, and the third is the orthosteric activation (agonist) site. The contacts found for the orthosteric site satisfy all the requirements deduced from mutagenesis experiments. Metadynamics simulations for V2R and its V1aR-analog give an excellent correlation with experimental binding free energies by assuming that the most stable binding site in the simulations corresponds to the experimental binding free energy in each case. The resulting three-site mechanism separates agonists from antagonists and explains subtype selectivity.
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