5NJ8

Structural basis for aryl hydrocarbon receptor mediated gene activation

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.333 
  • R-Value Work: 0.292 
  • R-Value Observed: 0.294 

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This is version 2.0 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: https://doi.org/10.1016/j.str.2017.05.008
  • Primary Citation of Related Structures:  
    5NJ8

  • 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 homeostasis. AHR is activated by xenobiotics, notably dioxin, as well as by exogenous and endogenous metabolites ...

    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. Electronic address: oliver.daumke@mdc-berlin.de.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Aryl hydrocarbon receptorA, C254Homo sapiensMutation(s): 0 
Gene Names: AHR, BHLHE76
UniProt & NIH Common Fund Data Resources
Find proteins for P35869 (Homo sapiens)
Explore P35869 
Go to UniProtKB:  P35869
PHAROS:  P35869
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UniProt GroupP35869
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Aryl hydrocarbon receptor nuclear translocatorB, D239Mus musculusMutation(s): 1 
Gene Names: ARNT
UniProt & NIH Common Fund Data Resources
Find proteins for P27540 (Homo sapiens)
Explore P27540 
Go to UniProtKB:  P27540
PHAROS:  P27540
Entity Groups  
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UniProt GroupP27540
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Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA (5'-D(*GP*GP*TP*CP*AP*CP*GP*CP*AP*AP*CP*C)-3')E, G12Homo sapiens
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Entity ID: 4
MoleculeChainsLengthOrganismImage
DNA (5'-D(*GP*GP*TP*TP*GP*CP*GP*TP*GP*AP*CP*C)-3')F, H12Homo sapiens
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.333 
  • R-Value Work: 0.292 
  • R-Value Observed: 0.294 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.321α = 90
b = 91.321β = 90
c = 464.914γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
AutoSolphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-28
    Type: Initial release
  • Version 1.1: 2017-07-19
    Changes: Database references
  • Version 2.0: 2020-02-05
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Polymer sequence, Source and taxonomy, Structure summary