Crystal Structure of Estrogen Receptor alpha-lasofoxifene complex

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.202 

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This is version 1.5 of the entry. See complete history


The 2.0 A crystal structure of the ER{alpha} ligand-binding domain complexed with lasofoxifene

Vajdos, F.F.Hoth, L.R.Geoghegan, K.F.Simons, S.P.LeMotte, P.K.Danley, D.E.Ammirati, M.J.Pandit, J.

(2007) Protein Sci 16: 897-905

  • DOI: https://doi.org/10.1110/ps.062729207
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Lasofoxifene is a new and potent selective estrogen receptor modulator (SERM). The structural basis of its interaction with the estrogen receptor has been investigated by crystallographic analysis of its complex with the ligand-binding domain of estrogen receptor alpha at a resolution of 2.0 A. As with other SERMs, lasofoxifene diverts the receptor from its agonist-bound conformation by displacing the C-terminal AF-2 helix into the site at which the LXXLL motif of coactivator proteins would otherwise be able to bind. Lasofoxifene achieves this effect by occupying the space normally filled by residue Leu 540, as well as by modulating the conformation of residues of helix 11 (His 524, Leu 525). A well-defined salt bridge between lasofoxifene and Asp 351 suggests that charge neutralization in this region of the receptor may explain the some of the antiestrogenic effects of lasofoxifene. The results suggest general features of ERalpha/SERM recognition, and add a new dimension to efforts to rationalize differences between the biological activity profiles exhibited by these important pharmacological agents.

  • Organizational Affiliation

    Department of Exploratory Medicinal Sciences, Pfizer Global Research and Development, Pfizer Inc., Groton, Connecticut 06340-8001, USA. felix.vajdos@pfizer.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Estrogen receptor253Homo 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 C3D

Download Ideal Coordinates CCD File 
C28 H31 N O2
Binding Affinity Annotations 
IDSourceBinding Affinity
C3D BindingDB:  2OUZ IC50: min: 0.5, max: 11 (nM) from 5 assay(s)
EC50: 3.1 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.202 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.306α = 90
b = 58.306β = 90
c = 275.033γ = 120
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection
  • Version 1.4: 2020-01-15
    Changes: Structure summary
  • Version 1.5: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description