1ILG

Crystal Structure of Apo Human Pregnane X Receptor Ligand Binding Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The human nuclear xenobiotic receptor PXR: structural determinants of directed promiscuity.

Watkins, R.E.Wisely, G.B.Moore, L.B.Collins, J.L.Lambert, M.H.Williams, S.P.Willson, T.M.Kliewer, S.A.Redinbo, M.R.

(2001) Science 292: 2329-2333

  • DOI: 10.1126/science.1060762
  • Primary Citation of Related Structures:  1ILH

  • PubMed Abstract: 
  • The human nuclear pregnane X receptor (hPXR) activates cytochrome P450-3A expression in response to a wide variety of xenobiotics and plays a critical role in mediating dangerous drug-drug interactions. We present the crystal structures of the ligand ...

    The human nuclear pregnane X receptor (hPXR) activates cytochrome P450-3A expression in response to a wide variety of xenobiotics and plays a critical role in mediating dangerous drug-drug interactions. We present the crystal structures of the ligand-binding domain of hPXR both alone and in complex with the cholesterol-lowering drug SR12813 at resolutions of 2.5 and 2.75 angstroms, respectively. The hydrophobic ligand-binding cavity of hPXR contains a small number of polar residues, permitting SR12813 to bind in three distinct orientations. The position and nature of these polar residues were found to be critical for establishing the precise pharmacologic activation profile of PXR. Our findings provide important insights into how hPXR detects xenobiotics and may prove useful in predicting and avoiding drug-drug interactions.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina (UNC) at Chapel Hill, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ORPHAN NUCLEAR RECEPTOR PXR
A
316Homo sapiensGene Names: NR1I2 (PXR)
Find proteins for O75469 (Homo sapiens)
Go to Gene View: NR1I2
Go to UniProtKB:  O75469
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.215 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 91.590α = 90.00
b = 91.590β = 90.00
c = 84.980γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
AMoREphasing
SCALEPACKdata scaling
MAR345data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-06-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description