2JFA

ESTROGEN RECEPTOR ALPHA LBD IN COMPLEX WITH AN AFFINITY-SELECTED COREPRESSOR PEPTIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


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:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ESTROGEN RECEPTOR
A
252Homo sapiensMutation(s): 0 
Gene Names: ESR1 (ESR, NR3A1)
Find proteins for P03372 (Homo sapiens)
Go to Gene View: ESR1
Go to UniProtKB:  P03372
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ESTROGEN RECEPTOR
B
252Homo sapiensMutation(s): 0 
Gene Names: ESR1 (ESR, NR3A1)
Find proteins for P03372 (Homo sapiens)
Go to Gene View: ESR1
Go to UniProtKB:  P03372
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
COREPRESSOR PEPTIDE
P, Q
16N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RAL
Query on RAL

Download SDF File 
Download CCD File 
A, B
RALOXIFENE
C28 H27 N O4 S
GZUITABIAKMVPG-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CCS
Query on CCS
B
L-PEPTIDE LINKINGC5 H9 N O4 SCYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RALIC50: 0.7 - 7 nM (95) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.193 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 126.573α = 90.00
b = 126.573β = 90.00
c = 113.429γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-02-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2016-12-21
    Type: Source and taxonomy, Structure summary
  • Version 1.3: 2018-01-24
    Type: Source and taxonomy