1XNX

Crystal structure of constitutive androstane receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of the murine constitutive androstane receptor complexed to androstenol; a molecular basis for inverse agonism

Shan, L.Vincent, J.Brunzelle, J.S.Dussault, I.Lin, M.Ianculescu, I.Sherman, M.A.Forman, B.M.Fernandez, E.

(2004) Mol Cell 16: 907-917

  • DOI: 10.1016/j.molcel.2004.11.037
  • Primary Citation of Related Structures:  
    1XNX

  • PubMed Abstract: 
  • The nuclear receptor CAR is a xenobiotic responsive transcription factor that plays a central role in the clearance of drugs and bilirubin while promoting cocaine and acetaminophen toxicity. In addition, CAR has established a "reverse" paradigm of nu ...

    The nuclear receptor CAR is a xenobiotic responsive transcription factor that plays a central role in the clearance of drugs and bilirubin while promoting cocaine and acetaminophen toxicity. In addition, CAR has established a "reverse" paradigm of nuclear receptor action where the receptor is active in the absence of ligand and inactive when bound to inverse agonists. We now report the crystal structure of murine CAR bound to the inverse agonist androstenol. Androstenol binds within the ligand binding pocket, but unlike many nuclear receptor ligands, it makes no contacts with helix H12/AF2. The transition from constitutive to basal activity (androstenol bound) appears to be associated with a ligand-induced kink between helices H10 and H11. This disrupts the previously predicted salt bridge that locks H12 in the transcriptionally active conformation. This mechanism of inverse agonism is distinct from traditional nuclear receptor antagonists thereby offering a new approach to receptor modulation.


    Organizational Affiliation

    Biochemistry, Cellular and Molecular Biology, University of Tennessee, Knoxville, TN 37996, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
constitutive androstane receptorAB256Mus musculusMutation(s): 0 
Gene Names: Nr1i3Car
Find proteins for O35627 (Mus musculus)
Explore O35627 
Go to UniProtKB:  O35627
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATE
Query on ATE

Download CCD File 
A, B
16,17-ANDROSTENE-3-OL
C19 H30 O
KRVXMNNRSSQZJP-PHFHYRSDSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ATEIC50:  250   nM  BindingDB
ATEKi :  416   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.353α = 90
b = 155.042β = 90
c = 134.607γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2004-10-05 
  • Released Date: 2005-01-04 
  • Deposition Author(s): Fernandez, E.

Revision History 

  • Version 1.0: 2005-01-04
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description