6IAR

Tricyclic indazoles a novel class of selective estrogen receptor degrader antagonists


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Tricyclic Indazoles-A Novel Class of Selective Estrogen Receptor Degrader Antagonists.

Scott, J.S.Bailey, A.Buttar, D.Carbajo, R.J.Curwen, J.Davey, P.R.J.Davies, R.D.M.Degorce, S.L.Donald, C.Gangl, E.Greenwood, R.Groombridge, S.D.Johnson, T.Lamont, S.Lawson, M.Lister, A.Morrow, C.J.Moss, T.A.Pink, J.H.Polanski, R.

(2019) J.Med.Chem. 62: 1593-1608

  • DOI: 10.1021/acs.jmedchem.8b01837

  • PubMed Abstract: 
  • Herein, we report the identification and synthesis of a series of tricyclic indazoles as a novel class of selective estrogen receptor degrader antagonists. Replacement of a phenol, present in our previously reported tetrahydroisoquinoline scaffold, w ...

    Herein, we report the identification and synthesis of a series of tricyclic indazoles as a novel class of selective estrogen receptor degrader antagonists. Replacement of a phenol, present in our previously reported tetrahydroisoquinoline scaffold, with an indazole group led to the removal of a reactive metabolite signal in an in vitro glutathione trapping assay. Further optimization, guided by X-ray crystal structures and NMR conformational work, varied the alkyl side chain and pendant aryl group and resulted in compounds with low turnover in human hepatocytes and enhanced chemical stability. Compound 9 was profiled as a representative of the series in terms of pharmacology and demonstrated the desired estrogen receptor α degrader-antagonist profile and demonstrated activity in a xenograft model of breast cancer.


    Organizational Affiliation

    Oncology IMED Biotech Unit , AstraZeneca, R&D Boston , 35 Gatehouse Drive , Waltham , Massachusetts 02451 , United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Estrogen receptor
A
237Homo sapiensMutation(s): 0 
Gene Names: ESR1 (ESR, NR3A1)
Find proteins for P03372 (Homo sapiens)
Go to Gene View: ESR1
Go to UniProtKB:  P03372
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
H8W
Query on H8W

Download SDF File 
Download CCD File 
A
3-[4-[(6~{R})-7-(2-methylpropyl)-3,6,8,9-tetrahydropyrazolo[4,3-f]isoquinolin-6-yl]phenyl]propanoic acid
C23 H27 N3 O2
PXIRDOQOUCTDMZ-HSZRJFAPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.190 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 58.353α = 90.00
b = 58.353β = 90.00
c = 275.443γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
AMoREphasing
Aimlessdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2019-01-23
    Type: Initial release
  • Version 1.1: 2019-02-06
    Type: Data collection, Database references
  • Version 1.2: 2019-04-24
    Type: Data collection, Database references