7BK4

Crystal structure of RXRalpha ligand binding domain in complex with a fragment of the TIF2 coactivator


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.247 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Structural Insights into the Interaction of the Intrinsically Disordered Co-activator TIF2 with Retinoic Acid Receptor Heterodimer (RXR/RAR).

Senicourt, L.le Maire, A.Allemand, F.Carvalho, J.E.Guee, L.Germain, P.Schubert, M.Bernado, P.Bourguet, W.Sibille, N.

(2021) J Mol Biol 433: 166899-166899

  • DOI: https://doi.org/10.1016/j.jmb.2021.166899
  • Primary Citation of Related Structures:  
    7AOS, 7APO, 7BK4

  • PubMed Abstract: 

    Retinoic acid receptors (RARs) and retinoid X receptors (RXRs) form heterodimers that activate target gene transcription by recruiting co-activator complexes in response to ligand binding. The nuclear receptor (NR) co-activator TIF2 mediates this recruitment by interacting with the ligand-binding domain (LBD) of NRs trough the nuclear receptor interaction domain (TIF2 NRID ) containing three highly conserved α-helical LxxLL motifs (NR-boxes). The precise binding mode of this domain to RXR/RAR is not clear due to the disordered nature of TIF2. Here we present the structural characterization of TIF2 NRID by integrating several experimental (NMR, SAXS, Far-UV CD, SEC-MALS) and computational data. Collectively, the data are in agreement with a largely disordered protein with partially structured regions, including the NR-boxes and their flanking regions, which are evolutionary conserved. NMR and X-ray crystallographic data on TIF2 NRID in complex with RXR/RAR reveal a multisite binding of the three NR-boxes as well as an active role of their flanking regions in the interaction.


  • Organizational Affiliation

    Centre de Biochimie Structurale (CBS), CNRS, INSERM, Univ Montpellier, Montpellier, France.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Retinoic acid receptor RXR-alpha
A, C
244Homo sapiensMutation(s): 0 
Gene Names: RXRANR2B1
UniProt & NIH Common Fund Data Resources
Find proteins for P19793 (Homo sapiens)
Explore P19793 
Go to UniProtKB:  P19793
PHAROS:  P19793
GTEx:  ENSG00000186350 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19793
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nuclear receptor coactivator 2
B, D
28Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q15596 (Homo sapiens)
Explore Q15596 
Go to UniProtKB:  Q15596
PHAROS:  Q15596
GTEx:  ENSG00000140396 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15596
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
LG2
Query on LG2

Download Ideal Coordinates CCD File 
E [auth A],
F [auth C]
6-[1-(3,5,5,8,8-PENTAMETHYL-5,6,7,8-TETRAHYDRONAPHTHALEN-2-YL)CYCLOPROPYL]PYRIDINE-3-CARBOXYLIC ACID
C24 H29 N O2
SLXTWXQUEZSSTJ-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
LG2 BindingDB:  7BK4 Ki: min: 3, max: 1.00e+4 (nM) from 11 assay(s)
Kd: min: 3, max: 3 (nM) from 2 assay(s)
IC50: min: 5, max: 8 (nM) from 2 assay(s)
EC50: min: 3, max: 40 (nM) from 8 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.247 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 179.132α = 90
b = 64.659β = 95.283
c = 48.514γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-04
    Type: Initial release
  • Version 1.1: 2024-01-31
    Changes: Data collection, Database references, Refinement description