1XNX

Crystal structure of constitutive androstane receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.288 
  • R-Value Work: 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

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
constitutive androstane receptor
A, B
256Mus musculusMutation(s): 0 
Gene Names: Nr1i3 (Car)
Find proteins for O35627 (Mus musculus)
Go to UniProtKB:  O35627
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATE
Query on ATE

Download SDF File 
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 (98) BINDINGDB
ATEKi: 416 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.229 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 60.353α = 90.00
b = 155.042β = 90.00
c = 134.607γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
AMoREphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



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
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description