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| Pàgina inicial > Articles > Articles publicats > Revealing the Mechanism of Agonist-Mediated Cannabinoid Receptor 1 (CB1) Activation and Phospholipid-Mediated Allosteric Modulation |
| Data: | 2019 |
| Resum: | Cannabinoid receptor 1 (CB1) mediates the functional responses of Δ-tetrahydrocannabinol. Although progress has been made in understanding cannabinoid binding and receptor activation, detailed knowledge of the dynamics involved in the activation mechanism of CB1 is lacking. Here, we use recently determined CB1 crystal structures to analyze its transition from inactive to active state by performing unbiased microsecond-length molecular dynamics (MD) simulations, totaling 32 μs, with and without bound potent cannabinoid agonist CP-55940. CB1 activation is characterized by an upward axial movement of transmembrane (TM) helix 3, inward movement of TM7, and outward movement of TM6. These conformational changes collectively allow G protein docking, although fully active states of the receptor occur only transiently during MD simulations. Additionally, positive allosteric modulation of CB1 by anionic phospholipids is found to increase action of the bound agonist. Specifically, this involves protein-lipid interactions at intracellular loop 3, TM6, and ionic lock residue Arg214. |
| Ajuts: | Ministerio de Economía y Competitividad SAF2014-58396-R Agencia Estatal de Investigación SAF2017-87199-R |
| Drets: | Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió acceptada per publicar |
| Publicat a: | Journal of medicinal chemistry, Vol. 62, Núm. 11 (June 2019) , p. 5638-5654, ISSN 1520-4804 |
Article. Postprint 49 p, 552.6 KB |
Figures. Postprint 8 p, 3.7 MB |