2JF9

ESTROGEN RECEPTOR ALPHA LBD IN COMPLEX WITH A TAMOXIFEN-SPECIFIC PEPTIDE ANTAGONIST


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural Insights Into Corepressor Recognition by Antagonist-Bound Estrogen Receptors.

Heldring, N.Pawson, T.Mcdonnell, D.Treuter, E.Gustafsson, J.A.Pike, A.C.W.

(2007) J Biol Chem 282: 10449

  • DOI: 10.1074/jbc.M611424200
  • Primary Citation of Related Structures:  
    2JF9, 2JFA

  • PubMed Abstract: 
  • Direct recruitment of transcriptional corepressors to estrogen receptors (ER) is thought to contribute to the tissue-specific effects of clinically important ER antagonists. Here, we present the crystal structures of two affinity-selected peptides in complex with antagonist-bound ERalpha ligand-binding domain ...

    Direct recruitment of transcriptional corepressors to estrogen receptors (ER) is thought to contribute to the tissue-specific effects of clinically important ER antagonists. Here, we present the crystal structures of two affinity-selected peptides in complex with antagonist-bound ERalpha ligand-binding domain. Both peptides adopt helical conformations, bind along the activation function 2 coregulator interaction surface, and mimic corepressor (CoRNR) sequence motif binding. Peptide binding is weak in a wild-type context but significantly enhanced by removal of ER helix 12. This region contains a previously unrecognized CoRNR motif that is able to compete with corepressors for binding to activation function 2, thereby providing a structural explanation for the poor ability of ER to directly interact with classical corepressors. Furthermore, the ability of other sequence motifs to mimic corepressor binding raises the possibility that coregulators do not necessarily require CoRNR motifs for direct recruitment to antagonist-bound ER.


    Organizational Affiliation

    Department of Biosciences and Nutrition, Karolinska Institutet, S-14157 Huddinge, Sweden. nina.heldring@biosci.ki.se



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ESTROGEN RECEPTORA, B, C252Homo 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:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
AB5 PEPTIDED [auth P], E [auth Q], F [auth R]13synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OHT (Subject of Investigation/LOI)
Query on OHT

Download Ideal Coordinates CCD File 
G [auth A], K [auth B], N [auth C]4-HYDROXYTAMOXIFEN
C26 H29 N O2
TXUZVZSFRXZGTL-QPLCGJKRSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
I [auth A], J [auth A], L [auth B], M [auth B], O [auth C], P [auth C]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
BCT
Query on BCT

Download Ideal Coordinates CCD File 
H [auth A]BICARBONATE ION
C H O3
BVKZGUZCCUSVTD-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
Q [auth P], RCALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
OHT BindingDB:  2JF9 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: 2.10 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 193.707α = 90
b = 193.707β = 90
c = 64.441γ = 120
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: 2007-02-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2016-12-21
    Changes: Source and taxonomy, Structure summary
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy