3F1O

Crystal structure of the high affinity heterodimer of HIF2 alpha and ARNT C-terminal PAS domains, with an internally-bound artificial ligand


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Artificial ligand binding within the HIF2alpha PAS-B domain of the HIF2 transcription factor.

Scheuermann, T.H.Tomchick, D.R.Machius, M.Guo, Y.Bruick, R.K.Gardner, K.H.

(2009) Proc Natl Acad Sci U S A 106: 450-455

  • DOI: 10.1073/pnas.0808092106
  • Primary Citation of Related Structures:  
    3F1N, 3F1O, 3F1P

  • PubMed Abstract: 
  • The hypoxia-inducible factor (HIF) basic helix-loop-helix Per-aryl hydrocarbon receptor nuclear translocator (ARNT)-Sim (bHLH-PAS) transcription factors are master regulators of the conserved molecular mechanism by which metazoans sense and respond to reductions in local oxygen concentrations ...

    The hypoxia-inducible factor (HIF) basic helix-loop-helix Per-aryl hydrocarbon receptor nuclear translocator (ARNT)-Sim (bHLH-PAS) transcription factors are master regulators of the conserved molecular mechanism by which metazoans sense and respond to reductions in local oxygen concentrations. In humans, HIF is critically important for the sustained growth and metastasis of solid tumors. Here, we describe crystal structures of the heterodimer formed by the C-terminal PAS domains from the HIF2alpha and ARNT subunits of the HIF2 transcription factor, both in the absence and presence of an artificial ligand. Unexpectedly, the HIF2alpha PAS-B domain contains a large internal cavity that accommodates ligands identified from a small-molecule screen. Binding one of these ligands to HIF2alpha PAS-B modulates the affinity of the HIF2alpha:ARNT PAS-B heterodimer in vitro. Given the essential role of PAS domains in forming active HIF heterodimers, these results suggest a presently uncharacterized ligand-mediated mechanism for regulating HIF2 activity in endogenous and clinical settings.


    Organizational Affiliation

    Departments of Biochemistry and Pharmacology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Endothelial PAS domain-containing protein 1 A117Homo sapiensMutation(s): 1 
Gene Names: EPAS1HIF2AHypoxia Inducible Factor 2 alphaMOP2BHLHE73PASD2
Find proteins for Q99814 (Homo sapiens)
Explore Q99814 
Go to UniProtKB:  Q99814
NIH Common Fund Data Resources
PHAROS:  Q99814
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Aryl hydrocarbon receptor nuclear translocator B121Homo sapiensMutation(s): 1 
Gene Names: ARNTAryl Hydrocarbon Receptor Nuclear TranslocatorBHLHE2
Find proteins for P27540 (Homo sapiens)
Explore P27540 
Go to UniProtKB:  P27540
NIH Common Fund Data Resources
PHAROS:  P27540
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2XY
Query on 2XY

Download Ideal Coordinates CCD File 
A
N-[2-nitro-4-(trifluoromethyl)phenyl]morpholin-4-amine
C11 H12 F3 N3 O3
XUPDNGHJBHPAKD-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.168 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.761α = 90
b = 83.019β = 106.36
c = 41.553γ = 90
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description