5TOA

Crystal Structure of ER beta bound to Estradiol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

An alternative conformation of ER beta bound to estradiol reveals H12 in a stable antagonist position.

Souza, P.C.T.Textor, L.C.Melo, D.C.Nascimento, A.S.Skaf, M.S.Polikarpov, I.

(2017) Sci Rep 7: 3509-3509

  • DOI: https://doi.org/10.1038/s41598-017-03774-x
  • Primary Citation of Related Structures:  
    5TOA

  • PubMed Abstract: 

    The natural ligand 17β-estradiol (E2) is so far believed to induce a unique agonist-bound active conformation in the ligand binding domain (LBD) of the estrogen receptors (ERs). Both subtypes, ERα and ERβ, are transcriptionally activated in the presence of E2 with ERβ being somewhat less active than ERα under similar conditions. The molecular bases for this intriguing behavior are mainly attributed to subtype differences in the amino-terminal domain of these receptors. However, structural details that confer differences in the molecular response of ER LBDs to E2 still remain elusive. In this study, we present a new crystallographic structure of the ERβ LBD bound to E2 in which H12 assumes an alternative conformation that resembles antagonist ERs structures. Structural observations and molecular dynamics simulations jointly provide evidence that alternative ERβ H12 position could correspond to a stable conformation of the receptor under physiological pH conditions. Our findings shed light on the unexpected role of LBD in the lower functional response of ERβ subtype.


  • Organizational Affiliation

    Institute of Chemistry, University of Campinas - UNICAMP, P. O. Box, 6154, Campinas, SP, Brazil.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Estrogen receptor beta
A, B
249Homo sapiensMutation(s): 0 
Gene Names: ESR2ESTRBNR3A2
UniProt & NIH Common Fund Data Resources
Find proteins for Q92731 (Homo sapiens)
Explore Q92731 
Go to UniProtKB:  Q92731
PHAROS:  Q92731
GTEx:  ENSG00000140009 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ92731
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
EST BindingDB:  5TOA Ki: min: 0.01, max: 100 (nM) from 10 assay(s)
Kd: min: 0.5, max: 4.1 (nM) from 2 assay(s)
IC50: min: 1.00e-2, max: 24 (nM) from 37 assay(s)
EC50: min: 1.00e-2, max: 30 (nM) from 44 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.811α = 90
b = 83.811β = 90
c = 168.531γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Sao Paulo Research Foundation (FAPESP)Brazil2014/22007-0
Sao Paulo Research Foundation (FAPESP)Brazil2013/08293-7
Sao Paulo Research Foundation (FAPESP)Brazil2012/24750-6

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-28
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.3: 2023-10-04
    Changes: Data collection, Database references, Refinement description