ESTROGEN RECEPTOR ALPHA LIGAND BINDING DOMAIN IN COMPLEX WITH (2E)-3-{4-[(1R)-2-(4-fluorophenyl)-6-hydroxy-1-methy l-1,2,3,4- tetrahydroisoquinolin-1-yl]phenyl}prop-2-enoic acid

Experimental Data Snapshot

  • Resolution: 2.22 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.242 

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.3 of the entry. See complete history


Discovery of an Acrylic Acid Based Tetrahydroisoquinoline as an Orally Bioavailable Selective Estrogen Receptor Degrader for ER alpha + Breast Cancer.

Burks, H.E.Abrams, T.Kirby, C.A.Baird, J.Fekete, A.Hamann, L.G.Kim, S.Lombardo, F.Loo, A.Lubicka, D.Macchi, K.McDonnell, D.P.Mishina, Y.Norris, J.D.Nunez, J.Saran, C.Sun, Y.Thomsen, N.M.Wang, C.Wang, J.Peukert, S.

(2017) J Med Chem 60: 2790-2818

  • DOI: https://doi.org/10.1021/acs.jmedchem.6b01468
  • Primary Citation of Related Structures:  
    5T92, 5T97

  • PubMed Abstract: 

    Tetrahydroisoquinoline 40 has been identified as a potent ERα antagonist and selective estrogen receptor degrader (SERD), exhibiting good oral bioavailability, antitumor efficacy, and SERD activity in vivo. We outline the discovery and chemical optimization of the THIQ scaffold leading to THIQ 40 and showcase the racemization of the scaffold, pharmacokinetic studies in preclinical species, and the in vivo efficacy of THIQ 40 in a MCF-7 human breast cancer xenograft model.

  • Organizational Affiliation

    Novartis Institutes for BioMedical Research , 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Estrogen receptor
A, B
254Homo sapiensMutation(s): 0 
Gene Names: ESR1ESRNR3A1
UniProt & NIH Common Fund Data Resources
Find proteins for P03372 (Homo sapiens)
Explore P03372 
Go to UniProtKB:  P03372
PHAROS:  P03372
GTEx:  ENSG00000091831 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03372
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 77W

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
(2E)-3-{4-[(1R)-2-(4-fluorophenyl)-6-hydroxy-1-methyl-1,2,3,4-tetrahydroisoquinolin-1-yl]phenyl}prop-2-enoic acid
C25 H22 F N O3
Binding Affinity Annotations 
IDSourceBinding Affinity
77W Binding MOAD:  5T92 IC50: 16 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.22 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.242 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.22α = 90
b = 53.89β = 114.11
c = 97.11γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-29
    Type: Initial release
  • Version 1.1: 2017-04-26
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references
  • Version 1.3: 2024-04-03
    Changes: Refinement description