5NJ8

Structural basis for aryl hydrocarbon receptor mediated gene activation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.333 
  • R-Value Work: 0.292 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for Aryl Hydrocarbon Receptor-Mediated Gene Activation.

Schulte, K.W.Green, E.Wilz, A.Platten, M.Daumke, O.

(2017) Structure 25: 1025-1033.e3

  • DOI: 10.1016/j.str.2017.05.008

  • PubMed Abstract: 
  • The aryl hydrocarbon receptor (AHR) and the AHR nuclear translocator (ARNT) constitute a heterodimeric basic helix-loop-helix-Per-ARNT-Sim (bHLH-PAS) domain containing transcription factor with central functions in development and cellular homeostasi ...

    The aryl hydrocarbon receptor (AHR) and the AHR nuclear translocator (ARNT) constitute a heterodimeric basic helix-loop-helix-Per-ARNT-Sim (bHLH-PAS) domain containing transcription factor with central functions in development and cellular homeostasis. AHR is activated by xenobiotics, notably dioxin, as well as by exogenous and endogenous metabolites. Modulation of AHR activity holds promise for the treatment of diseases featuring altered cellular homeostasis, such as cancer or autoimmune disorders. Here, we present the crystal structure of a heterodimeric AHR:ARNT complex containing the PAS A and bHLH domain bound to its target DNA. The structure provides insights into the DNA binding mode of AHR and elucidates how stable dimerization of AHR:ARNT is achieved through sophisticated domain interplay via three specific interfaces. Using mutational analyses, we prove the relevance of the observed interfaces for AHR-mediated gene activation. Thus, our work establishes the structural basis of AHR assembly and DNA interaction and provides a template for targeted drug design.


    Organizational Affiliation

    Crystallography Department, Max-Delbrück-Center for Molecular Medicine, Robert-Rössle-Strasse 10, 13125 Berlin, Germany; Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 6, 14195 Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aryl hydrocarbon receptor
A, C
254Homo sapiensGene Names: AHR (BHLHE76)
Find proteins for P35869 (Homo sapiens)
Go to Gene View: AHR
Go to UniProtKB:  P35869
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Aryl hydrocarbon receptor nuclear translocator
B, D
267Homo sapiensGene Names: ARNT (BHLHE2)
Find proteins for P27540 (Homo sapiens)
Go to Gene View: ARNT
Go to UniProtKB:  P27540
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(*GP*GP*TP*CP*AP*CP*GP*CP*AP*AP*CP*C)-3')E,G12Homo sapiens
Entity ID: 4
MoleculeChainsLengthOrganism
DNA (5'-D(*GP*GP*TP*TP*GP*CP*GP*TP*GP*AP*CP*C)-3')F,H12Homo sapiens
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ER3
Query on ER3

Download SDF File 
Download CCD File 
A, B, C, D, E, G, H
ERBIUM (III) ION
Er
JHFPQYFEJICGKC-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.333 
  • R-Value Work: 0.292 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 91.321α = 90.00
b = 91.321β = 90.00
c = 464.914γ = 120.00
Software Package:
Software NamePurpose
XDSdata scaling
AutoSolphasing
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-06-28
    Type: Initial release
  • Version 1.1: 2017-07-19
    Type: Database references