1XLS

Crystal structure of the mouse CAR/RXR LBD heterodimer bound to TCPOBOP and 9cRA and a TIF2 peptide containg the third LXXLL motifs


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.96 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.255 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

The nuclear xenobiotic receptor CAR: structural determinants of constitutive activation and heterodimerization.

Suino, K.Peng, L.Reynolds, R.Li, Y.Cha, J.Y.Repa, J.J.Kliewer, S.A.Xu, H.E.

(2004) Mol.Cell 16: 893-905

  • DOI: 10.1016/j.molcel.2004.11.036

  • PubMed Abstract: 
  • Constitutive androstane receptor (CAR) induces xenobiotic, bilirubin, and thyroid hormone metabolism as a heterodimer with the retinoid X receptor (RXR). Unlike ligand-dependent nuclear receptors, CAR is constitutively active. Here, we report the het ...

    Constitutive androstane receptor (CAR) induces xenobiotic, bilirubin, and thyroid hormone metabolism as a heterodimer with the retinoid X receptor (RXR). Unlike ligand-dependent nuclear receptors, CAR is constitutively active. Here, we report the heterodimeric structure of the CAR and RXR ligand binding domains (LBDs), which reveals an unusually large dimerization interface and a small CAR ligand binding pocket. Constitutive CAR activity appears to be mediated by the compact nature of the CAR LBD that displays several unique features including a shortened AF2 helix and helix H10, which are linked by a two-turn helix that normally adopts an extended loop in other receptors, and an extended helix H2 that stabilizes the canonical LBD fold by packing tightly against helix H3. These structural observations provide a molecular framework for understanding the atypical transcriptional activation properties of CAR.


    Organizational Affiliation

    Laboratory of Structural Sciences, Van Andel Research Institute, 333 Bostwick Avenue, Grand Rapids, MI 49503, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Retinoic acid receptor RXR-alpha
A, B, C, D
232Homo sapiensMutation(s): 0 
Gene Names: RXRA (NR2B1)
Find proteins for P19793 (Homo sapiens)
Go to Gene View: RXRA
Go to UniProtKB:  P19793
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Orphan nuclear receptor NR1I3
E, F, G, H
242Mus musculusMutation(s): 0 
Gene Names: Nr1i3 (Car)
Find proteins for O35627 (Mus musculus)
Go to UniProtKB:  O35627
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor coactivator 2
I, J, K, L, M, N, O, P
18Rattus norvegicusMutation(s): 0 
Gene Names: Ncoa2 (Tif2)
Find proteins for Q9WUI9 (Rattus norvegicus)
Go to UniProtKB:  Q9WUI9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
9CR
Query on 9CR

Download SDF File 
Download CCD File 
A, B, C, D
(9cis)-retinoic acid
C20 H28 O2
SHGAZHPCJJPHSC-ZVCIMWCZSA-N
 Ligand Interaction
TCD
Query on TCD

Download SDF File 
Download CCD File 
E, F, G, H
3,5-DICHLORO-2-{4-[(3,5-DICHLOROPYRIDIN-2-YL)OXY]PHENOXY}PYRIDINE
C16 H8 Cl4 N2 O2
BAFKRPOFIYPKBQ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.96 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.255 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 68.271α = 79.02
b = 88.381β = 85.81
c = 105.494γ = 67.22
Software Package:
Software NamePurpose
MAR345data collection
CNSrefinement
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2016-11-09
    Type: Non-polymer description, Source and taxonomy
  • Version 1.4: 2017-10-11
    Type: Refinement description