2QXS

Crystal Structure of Antagonizing Mutant 536S of the Estrogen Receptor Alpha Ligand Binding Domain Complexed to Raloxifene


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.3 of the entry. See complete history


Literature

Coupling of receptor conformation and ligand orientation determine graded activity.

Bruning, J.B.Parent, A.A.Gil, G.Zhao, M.Nowak, J.Pace, M.C.Smith, C.L.Afonine, P.V.Adams, P.D.Katzenellenbogen, J.A.Nettles, K.W.

(2010) Nat Chem Biol 6: 837-843

  • DOI: https://doi.org/10.1038/nchembio.451
  • Primary Citation of Related Structures:  
    2QXS, 2QZO, 3OS8, 3OS9, 3OSA

  • PubMed Abstract: 

    Small molecules stabilize specific protein conformations from a larger ensemble, enabling molecular switches that control diverse cellular functions. We show here that the converse also holds true: the conformational state of the estrogen receptor can direct distinct orientations of the bound ligand. 'Gain-of-allostery' mutations that mimic the effects of ligand in driving protein conformation allowed crystallization of the partial agonist ligand WAY-169916 with both the canonical active and inactive conformations of the estrogen receptor. The intermediate transcriptional activity induced by WAY-169916 is associated with the ligand binding differently to the active and inactive conformations of the receptor. Analyses of a series of chemical derivatives demonstrated that altering the ensemble of ligand binding orientations changes signaling output. The coupling of different ligand binding orientations to distinct active and inactive protein conformations defines a new mechanism for titrating allosteric signaling activity.


  • Organizational Affiliation

    Department of Cancer Biology, The Scripps Research Institute, Scripps Florida, Jupiter, Florida, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Estrogen receptor
A, B
258Homo sapiensMutation(s): 1 
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
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
CME
Query on CME
A, B
L-PEPTIDE LINKINGC5 H11 N O3 S2CYS
Binding Affinity Annotations 
IDSourceBinding Affinity
RAL BindingDB:  2QXS Ki: min: 0.03, max: 2 (nM) from 7 assay(s)
IC50: min: 0.18, max: 222 (nM) from 27 assay(s)
EC50: min: 0.66, max: 22 (nM) from 4 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.588α = 90
b = 58.102β = 102.66
c = 87.95γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2017-10-25
    Changes: Advisory, Atomic model, Refinement description, Source and taxonomy
  • Version 2.1: 2021-10-20
    Changes: Advisory, Database references, Derived calculations
  • Version 2.2: 2023-08-30
    Changes: Data collection, Refinement description
  • Version 2.3: 2024-03-13
    Changes: Source and taxonomy