Selective estrogen receptor downregulator antagonists: Tetrahydroisoquinoline phenols 4.

Experimental Data Snapshot

  • Resolution: 1.99 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

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Ligand Structure Quality Assessment 

This is version 1.3 of the entry. See complete history


Tetrahydroisoquinoline Phenols: Selective Estrogen Receptor Downregulator Antagonists with Oral Bioavailability in Rat.

Scott, J.S.Bailey, A.Davies, R.D.Degorce, S.L.MacFaul, P.A.Gingell, H.Moss, T.Norman, R.A.Pink, J.H.Rabow, A.A.Roberts, B.Smith, P.D.

(2016) ACS Med Chem Lett 7: 94

  • DOI: https://doi.org/10.1021/acsmedchemlett.5b00413
  • Primary Citation of Related Structures:  
    5FQP, 5FQR, 5FQS, 5FQT, 5FQV

  • PubMed Abstract: 

    A series of tetrahydroisoquinoline phenols was modified to give an estrogen receptor downregulator-antagonist profile. Optimization around the core, alkyl side chain, and pendant aryl ring resulted in compounds with subnanomolar levels of potency. The phenol functionality was shown to be required to achieve highly potent compounds, but unusually this was compatible with obtaining high oral bioavailabilities in rat.

  • Organizational Affiliation

    Oncology iMed, AstraZeneca , Mereside, Alderley Park, Macclesfield, SK10 4TG, U.K.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ESTROGEN RECEPTOR ALPHA248Homo sapiensMutation(s): 3 
UniProt & NIH Common Fund Data Resources
Find proteins for P03372 (Homo sapiens)
Explore P03372 
Go to UniProtKB:  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 7QN

Download Ideal Coordinates CCD File 
B [auth A](E)-3-[4-(6-hydroxy-2-isobutyl-5-methyl-3,4-dihydro-1H-isoquinolin-1-yl)phenyl]prop-2-enoic acid
C23 H27 N O3
Binding Affinity Annotations 
IDSourceBinding Affinity
7QN BindingDB:  5FQT IC50: min: 170, max: 610 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.99 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.323α = 90
b = 58.323β = 90
c = 276.354γ = 120
Software Package:
Software NamePurpose

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-10
    Type: Initial release
  • Version 1.1: 2016-10-12
    Changes: Database references
  • Version 1.2: 2018-09-19
    Changes: Data collection, Database references, Structure summary
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Derived calculations, Other