2BJ4

ESTROGEN RECEPTOR ALPHA LBD IN COMPLEX WITH A PHAGE-DISPLAY DERIVED PEPTIDE ANTAGONIST


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Delineation of a Unique Protein-Protein Interaction Site on the Surface of the Estrogen Receptor

Kong, E.Heldring, N.Gustafsson, J.A.Treuter, E.Hubbard, R.E.Pike, A.C.W.

(2005) Proc Natl Acad Sci U S A 102: 3593

  • DOI: 10.1073/pnas.0407189102
  • Primary Citation of Related Structures:  
    2BJ4

  • PubMed Abstract: 
  • Recent studies have identified a series of estrogen receptor (ER)-interacting peptides that recognize sites that are distinct from the classic coregulator recruitment (AF2) region. Here, we report the structural and functional characterization of an ERalpha-specific peptide that binds to the liganded receptor in an AF2-independent manner ...

    Recent studies have identified a series of estrogen receptor (ER)-interacting peptides that recognize sites that are distinct from the classic coregulator recruitment (AF2) region. Here, we report the structural and functional characterization of an ERalpha-specific peptide that binds to the liganded receptor in an AF2-independent manner. The 2-A crystal structure of the ER/peptide complex reveals a binding site that is centered on a shallow depression on the beta-hairpin face of the ligand-binding domain. The peptide binds in an unusual extended conformation and makes multiple contacts with the ligand-binding domain. The location and architecture of the binding site provides an insight into the peptide's ER subtype specificity and ligand interaction preferences. In vivo, an engineered coactivator containing the peptide motif is able to strongly enhance the transcriptional activity of liganded ERalpha, particularly in the presence of 4-hydroxytamoxifen. Furthermore, disruption of this binding surface alters ER's response to the coregulator TIF2. Together, these results indicate that this previously unknown interaction site represents a bona fide control surface involved in regulating receptor activity.


    Organizational Affiliation

    Structural Biology Laboratory, Chemistry Department, University of York, York YO10 5YW, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ESTROGEN RECEPTORA252Homo 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
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ESTROGEN RECEPTORB252Homo 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
Protein Feature View
Expand
  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDE ANTAGONISTC, D11synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OHT (Subject of Investigation/LOI)
Query on OHT

Download Ideal Coordinates CCD File 
E [auth A], F [auth B]4-HYDROXYTAMOXIFEN
C26 H29 N O2
TXUZVZSFRXZGTL-QPLCGJKRSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CCS
Query on CCS
BL-PEPTIDE LINKINGC5 H9 N O4 SCYS
Binding Affinity Annotations 
IDSourceBinding Affinity
OHT BindingDB:  2BJ4 Ki: min: 0.04, max: 5.7 (nM) from 5 assay(s)
IC50: min: 0.31, max: 40 (nM) from 11 assay(s)
EC50: min: 6, max: 16 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.76α = 90
b = 98.76β = 90
c = 105.64γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2018-01-24
    Changes: Source and taxonomy