2Q70

Estrogen receptor alpha ligand-binding domain complxed to a benzopyran ligand


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.260 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Benzopyrans as selective estrogen receptor beta agonists (SERBAs). Part 3: synthesis of cyclopentanone and cyclohexanone intermediates for C-ring modification.

Richardson, T.I.Dodge, J.A.Durst, G.L.Pfeifer, L.A.Shah, J.Wang, Y.Durbin, J.D.Krishnan, V.Norman, B.H.

(2007) Bioorg Med Chem Lett 17: 4824-4828

  • DOI: 10.1016/j.bmcl.2007.06.052
  • Primary Citation of Related Structures:  
    2Q70, 2Z4B

  • PubMed Abstract: 
  • Benzopyrans are selective estrogen receptor (ER) beta agonists (SERBAs), which bind the ER subtypes alpha and beta in opposite orientations. Here we describe the syntheses of cyclopentanone and cyclohexanone intermediates for SAR studies of the C-ring on the benzopyran scaffold ...

    Benzopyrans are selective estrogen receptor (ER) beta agonists (SERBAs), which bind the ER subtypes alpha and beta in opposite orientations. Here we describe the syntheses of cyclopentanone and cyclohexanone intermediates for SAR studies of the C-ring on the benzopyran scaffold. Modification of the C-ring disrupts binding to ERalpha, thus improving ERbeta selectivity up to 100-fold. X-ray cocrystal structures confirm previously observed binding modes.


    Organizational Affiliation

    Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA. t_richardson@lilly.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Estrogen receptorA, B248Homo sapiensMutation(s): 3 
Gene Names: ESR1ESRNR3A1
UniProt & NIH Common Fund Data Resources
Find proteins for P03372 (Homo sapiens)
Explore P03372 
Go to UniProtKB:  P03372
PHAROS:  P03372
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03372
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DC8
Query on DC8

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
(3AS,4R,9BR)-2,2-DIFLUORO-4-(4-HYDROXYPHENYL)-1,2,3,3A,4,9B-HEXAHYDROCYCLOPENTA[C]CHROMEN-8-OL
C18 H16 F2 O3
QJSMFUTULGSHNQ-ZOBUZTSGSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
DC8 Binding MOAD:  2Q70 Ki: 8.3 (nM) from 1 assay(s)
BindingDB:  2Q70 Ki: min: 8.3, max: 8.4 (nM) from 2 assay(s)
PDBBind:  2Q70 Ki: 8.3 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.260 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.558α = 90
b = 97.88β = 90
c = 174.156γ = 90
Software Package:
Software NamePurpose
CNXrefinement
MAR345dtbdata collection
HKL-2000data reduction
HKL-2000data scaling
CNXphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

  • Deposited Date: 2007-06-05 
  • Released Date: 2007-08-07 
  • Deposition Author(s): Wang, Y.

Revision History  (Full details and data files)

  • Version 1.0: 2007-08-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2021-10-20
    Changes: Database references, Derived calculations