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Structure paper

TitleStructure of a Hallucinogen-Activated Gq-Coupled 5-HT Serotonin Receptor.
Journal, issue, pagesCell, Vol. 182, Issue 6, Page 1574-1588.e19, Year 2020
Publish dateSep 17, 2020
AuthorsKuglae Kim / Tao Che / Ouliana Panova / Jeffrey F DiBerto / Jiankun Lyu / Brian E Krumm / Daniel Wacker / Michael J Robertson / Alpay B Seven / David E Nichols / Brian K Shoichet / Georgios Skiniotis / Bryan L Roth /
PubMed AbstractHallucinogens like lysergic acid diethylamide (LSD), psilocybin, and substituted N-benzyl phenylalkylamines are widely used recreationally with psilocybin being considered as a therapeutic for many ...Hallucinogens like lysergic acid diethylamide (LSD), psilocybin, and substituted N-benzyl phenylalkylamines are widely used recreationally with psilocybin being considered as a therapeutic for many neuropsychiatric disorders including depression, anxiety, and substance abuse. How psychedelics mediate their actions-both therapeutic and hallucinogenic-are not understood, although activation of the 5-HT serotonin receptor (HTR2A) is key. To gain molecular insights into psychedelic actions, we determined the active-state structure of HTR2A bound to 25-CN-NBOH-a prototypical hallucinogen-in complex with an engineered Gαq heterotrimer by cryoelectron microscopy (cryo-EM). We also obtained the X-ray crystal structures of HTR2A complexed with the arrestin-biased ligand LSD or the inverse agonist methiothepin. Comparisons of these structures reveal determinants responsible for HTR2A-Gαq protein interactions as well as the conformational rearrangements involved in active-state transitions. Given the potential therapeutic actions of hallucinogens, these findings could accelerate the discovery of more selective drugs for the treatment of a variety of neuropsychiatric disorders.
External linksCell / PubMed:32946782 / PubMed Central
MethodsEM (single particle)
Resolution3.36 Å
Structure data

21669

6wha

EMDB-21669, PDB-6wha:
HTR2A bound to 25-CN-NBOH in complex with a mini-Galpha-q protein, beta/gamma subunits and an active-state stabilizing single-chain variable fragment (scFv16) obtained by cryo-electron microscopy (cryoEM)
Method: EM (single particle) / Resolution: 3.36 Å

Chemicals

ChemComp-U0G:
4-(2-{[(2-hydroxyphenyl)methyl]amino}ethyl)-2,5-dimethoxybenzonitrile / agonist*YM / 25CN-NBOH

Source
  • homo sapiens (human)
  • escherichia coli (E. coli)
KeywordsMEMBRANE PROTEIN/IMMUNE SYSTEM / 5HT2A / G protein / 25-CN-NBOH / GPCR / cryo-EM / MEMBRANE PROTEIN-IMMUNE SYSTEM complex

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