4M4X

Structure and Dimerization Properties of the Aryl Hydrocarbon Receptor (AHR) PAS-A Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.551 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and dimerization properties of the aryl hydrocarbon receptor PAS-A domain.

Wu, D.Potluri, N.Kim, Y.Rastinejad, F.

(2013) Mol.Cell.Biol. 33: 4346-4356

  • DOI: 10.1128/MCB.00698-13

  • PubMed Abstract: 
  • The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor that binds to xenobiotics and responds by regulating the expression of gene programs required for detoxification and metabolism. AHR and its heterodimerization partner ary ...

    The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor that binds to xenobiotics and responds by regulating the expression of gene programs required for detoxification and metabolism. AHR and its heterodimerization partner aryl hydrocarbon receptor nuclear translocator (ARNT) belong to the basic helix-loop-helix (bHLH)-PER-ARNT-SIM (PAS) family of transcription factors. Here we report the 2.55-Å-resolution crystal structure of the mouse AHR PAS-A domain, which represents the first AHR-derived protein structure. The AHR PAS-A domain forms a helix-swapped homodimer in the crystal and also in solution. Through a detailed mutational analysis of all interface residues, we identified several hydrophobic residues that are important for AHR dimerization and function. Our crystallographic visualization of AHR PAS-A dimerization leads us to propose a mode of heterodimerization with ARNT that is supported by both biochemical and cell-based data. Our studies also highlight the residues of other mammalian bHLH-PAS proteins that are likely involved in their homo- or heterodimerization.


    Organizational Affiliation

    Metabolic Signaling and Disease Program, Sanford-Burnham Medical Research Institute, Orlando, Florida, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aryl hydrocarbon receptor
A, B
187Mus musculusGene Names: Ahr
Find proteins for P30561 (Mus musculus)
Go to UniProtKB:  P30561
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.551 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.200 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 88.173α = 90.00
b = 88.173β = 90.00
c = 110.014γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
DENZOdata reduction
SCALEPACKdata scaling
HKL-3000data scaling
PHENIXrefinement
HKL-3000data collection
HKL-3000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-18
    Type: Initial release
  • Version 1.1: 2013-12-25
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description