Crystal structure of PPARgamma ligand binding domain in complex with monosulfate tetrabromo-bisphenol A (MonoTBBPA)

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.192 

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Characterization of Novel Ligands of ER{alpha}, Er{beta}, and PPAR{gamma}: The Case of Halogenated Bisphenol A and Their Conjugated Metabolites.

Riu, A.le Maire, A.Grimaldi, M.Audebert, M.Hillenweck, A.Bourguet, W.Balaguer, P.Zalko, D.

(2011) Toxicol Sci 122: 372-382

  • DOI: https://doi.org/10.1093/toxsci/kfr132
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The capability of the flame retardants tetrabromobisphenol A (TBBPA) and tetrachlorobisphenol A (TCBPA) to activate peroxysome proliferator-activated receptors (PPARs) α, β, and γ and estrogen receptors (ERs) α and β has been recently investigated, but the activity of their biotransformation products and of their lower molecular weight analogues formed in the environment remains unexplored. The aim of this study was to investigate the relationship between the degree of halogenation of BPA analogues and their affinity and activity towards human PPARγ and ERs and to characterize active metabolites of major marketed halogenated bisphenols. The biological activity of all compounds was studied using reporter cell lines expressing these nuclear receptors (NRs). We used NR-based affinity columns to rapidly evaluate the binding affinity of halogenated bisphenols for PPARγ and ERs and to trap active metabolites of TBBPA and TCBPA formed in HepG2 cells. The agonistic potential of BPA analogs highly depends on their halogenation degree: the bulkier halogenated BPA analogs, the greater their capability to activate PPARγ. In addition, PPARγ-based affinity column, HGELN-PPARγ reporter cell line and crystallographic analysis clearly demonstrate that the sulfation pathway, usually considered as a detoxification process, leads for TBBPA and TCBPA, to the formation of sulfate conjugates which possess a residual PPARγ-binding activity. Our results highlight the effectiveness NR-based affinity columns to trap and characterize biologically active compounds from complex matrices. Polyhalogenated bisphenols, but also some of their metabolites, are potential disrupters of PPARγ activity.

  • Organizational Affiliation

    Institut National de la Recherche Agronomique, UMR 1331 TOXALIM (Research Centre in Food Toxicology), F-31027 Toulouse, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peroxisome proliferator-activated receptor gamma
A, B
286Homo sapiensMutation(s): 0 
Gene Names: PPARGNR1C3
UniProt & NIH Common Fund Data Resources
Find proteins for P37231 (Homo sapiens)
Explore P37231 
Go to UniProtKB:  P37231
PHAROS:  P37231
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37231
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZXG

Download Ideal Coordinates CCD File 
C [auth A]2,6-dibromo-4-[2-(3,5-dibromo-4-hydroxyphenyl)propan-2-yl]phenyl hydrogen sulfate
C15 H12 Br4 O5 S
Query on PGO

Download Ideal Coordinates CCD File 
C3 H8 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.192 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.371α = 90
b = 61.564β = 102.89
c = 119.074γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction
DNAdata collection

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-08-31
    Changes: Database references