7W6P

Cryo-EM structure of the alpha2A adrenergic receptor GoA signaling complex bound to a G protein biased agonist

Summary for 7W6P

• Entry DOI: 10.2210/pdb7w6p/pdb
• EMDB information: 32331
• Descriptor: Guanine nucleotide-binding protein G(o) subunit alpha, Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2, ... (6 entities in total)
• Functional Keywords: gpcr, g-protein, signaling complex, biased agonist, membrane protein
• Biological source: Homo sapiens (human); More
• Total number of polymer chains: 5
• Total formula weight: 170189.11

Authors

Xu, J.,Fink, E.A.,Shoichet, B.K.,Du, Y. (deposition date: 2021-12-02, release date: 2022-09-28, Last modification date: 2024-11-13)

Primary citation

Fink, E.A.,Xu, J.,Hubner, H.,Braz, J.M.,Seemann, P.,Avet, C.,Craik, V.,Weikert, D.,Schmidt, M.F.,Webb, C.M.,Tolmachova, N.A.,Moroz, Y.S.,Huang, X.P.,Kalyanaraman, C.,Gahbauer, S.,Chen, G.,Liu, Z.,Jacobson, M.P.,Irwin, J.J.,Bouvier, M.,Du, Y.,Shoichet, B.K.,Basbaum, A.I.,Gmeiner, P.
Structure-based discovery of nonopioid analgesics acting through the alpha 2A -adrenergic receptor.
Science, 377:eabn7065-eabn7065, 2022

PubMed Abstract: Because nonopioid analgesics are much sought after, we computationally docked more than 301 million virtual molecules against a validated pain target, the α-adrenergic receptor (αAR), seeking new αAR agonists chemotypes that lack the sedation conferred by known αAR drugs, such as dexmedetomidine. We identified 17 ligands with potencies as low as 12 nanomolar, many with partial agonism and preferential G and G signaling. Experimental structures of αAR complexed with two of these agonists confirmed the docking predictions and templated further optimization. Several compounds, including the initial docking hit '9087 [mean effective concentration (EC) of 52 nanomolar] and two analogs, '7075 and PS75 (EC 4.1 and 4.8 nanomolar), exerted on-target analgesic activity in multiple in vivo pain models without sedation. These newly discovered agonists are interesting as therapeutic leads that lack the liabilities of opioids and the sedation of dexmedetomidine.

PubMed: 36173843
DOI: 10.1126/science.abn7065

Experimental method

ELECTRON MICROSCOPY (3.47 Å)