Crystal structure of 5-HT2C in complex with ergotamine

Experimental Data Snapshot

  • Resolution: 3.00 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.263 

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5-HT2C Receptor Structures Reveal the Structural Basis of GPCR Polypharmacology.

Peng, Y.McCorvy, J.D.Harpsoe, K.Lansu, K.Yuan, S.Popov, P.Qu, L.Pu, M.Che, T.Nikolajsen, L.F.Huang, X.P.Wu, Y.Shen, L.Bjorn-Yoshimoto, W.E.Ding, K.Wacker, D.Han, G.W.Cheng, J.Katritch, V.Jensen, A.A.Hanson, M.A.Zhao, S.Gloriam, D.E.Roth, B.L.Stevens, R.C.Liu, Z.J.

(2018) Cell 172: 719-730.e14

  • DOI: https://doi.org/10.1016/j.cell.2018.01.001
  • Primary Citation of Related Structures:  
    6BQG, 6BQH

  • PubMed Abstract: 

    Drugs frequently require interactions with multiple targets-via a process known as polypharmacology-to achieve their therapeutic actions. Currently, drugs targeting several serotonin receptors, including the 5-HT 2C receptor, are useful for treating obesity, drug abuse, and schizophrenia. The competing challenges of developing selective 5-HT 2C receptor ligands or creating drugs with a defined polypharmacological profile, especially aimed at G protein-coupled receptors (GPCRs), remain extremely difficult. Here, we solved two structures of the 5-HT 2C receptor in complex with the highly promiscuous agonist ergotamine and the 5-HT 2A-C receptor-selective inverse agonist ritanserin at resolutions of 3.0 Å and 2.7 Å, respectively. We analyzed their respective binding poses to provide mechanistic insights into their receptor recognition and opposing pharmacological actions. This study investigates the structural basis of polypharmacology at canonical GPCRs and illustrates how understanding characteristic patterns of ligand-receptor interaction and activation may ultimately facilitate drug design at multiple GPCRs.

  • Organizational Affiliation

    iHuman Institute, ShanghaiTech University, Shanghai 201210, China; Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
5-hydroxytryptamine receptor 2C,Soluble cytochrome b562452Homo sapiensEscherichia coliMutation(s): 4 
Gene Names: HTR2CHTR1CcybC
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P28335 (Homo sapiens)
Explore P28335 
Go to UniProtKB:  P28335
PHAROS:  P28335
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0ABE7P28335
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ERM

Download Ideal Coordinates CCD File 
B [auth A]Ergotamine
C33 H35 N5 O5
Query on OLC

Download Ideal Coordinates CCD File 
C [auth A](2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.263 
  • Space Group: P 2 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.84α = 90
b = 94.58β = 90
c = 145.16γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-14
    Type: Initial release
  • Version 1.1: 2018-02-21
    Changes: Database references
  • Version 1.2: 2023-10-04
    Changes: Data collection, Database references, Refinement description