8UH3

Serotonin 1E receptor (5-HT1eR)-Gi1 Complex bound with Setiptiline


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.31 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insights into the unexpected agonism of tetracyclic antidepressants at serotonin receptors 5-HT 1e R and 5-HT 1F R.

Zilberg, G.Parpounas, A.K.Warren, A.L.Fiorillo, B.Provasi, D.Filizola, M.Wacker, D.

(2024) Sci Adv 10: eadk4855-eadk4855

  • DOI: https://doi.org/10.1126/sciadv.adk4855
  • Primary Citation of Related Structures:  
    8UGY, 8UH3

  • PubMed Abstract: 

    Serotonin [5-hydroxytryptamine (5-HT)] acts via 13 different receptors in humans. Of these receptor subtypes, all but 5-HT 1e R have confirmed roles in native tissue and are validated drug targets. Despite 5-HT 1e R's therapeutic potential and plausible druggability, the mechanisms of its activation remain elusive. To illuminate 5-HT 1e R's pharmacology in relation to the highly homologous 5-HT 1F R, we screened a library of aminergic receptor ligands at both receptors and observe 5-HT 1e R/5-HT 1F R agonism by multicyclic drugs described as pan-antagonists at 5-HT receptors. Potent agonism by tetracyclic antidepressants mianserin, setiptiline, and mirtazapine suggests a mechanism for their clinically observed antimigraine properties. Using cryo-EM and mutagenesis studies, we uncover and characterize unique agonist-like binding poses of mianserin and setiptiline at 5-HT 1e R distinct from similar drug scaffolds in inactive-state 5-HTR structures. Together with computational studies, our data suggest that these binding poses alongside receptor-specific allosteric coupling in 5-HT 1e R and 5-HT 1F R contribute to the agonist activity of these antidepressants.


  • Organizational Affiliation

    Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1A [auth B]358Homo sapiensMutation(s): 0 
Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens)
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PHAROS:  P62873
GTEx:  ENSG00000078369 
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UniProt GroupP62873
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1B [auth A]354Homo sapiensMutation(s): 0 
Gene Names: GNAI1
EC: 3.6.5
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens)
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PHAROS:  P63096
GTEx:  ENSG00000127955 
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UniProt GroupP63096
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
5-hydroxytryptamine receptor 1EC [auth D]365Homo sapiensMutation(s): 1 
Gene Names: HTR1E
Membrane Entity: Yes 
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PHAROS:  P28566
GTEx:  ENSG00000168830 
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UniProt GroupP28566
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
ScFv16D [auth E]259Mus musculusMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2E [auth G]71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Find proteins for P59768 (Homo sapiens)
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PHAROS:  P59768
GTEx:  ENSG00000186469 
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UniProt GroupP59768
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.31 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM133504
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM062754
National Institutes of Health/National Institute on Drug Abuse (NIH/NIDA)United StatesDA053558
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)United StatesMH132317

Revision History  (Full details and data files)

  • Version 1.0: 2024-05-01
    Type: Initial release
  • Version 1.1: 2024-05-08
    Changes: Database references
  • Version 1.2: 2024-10-30
    Changes: Data collection, Structure summary