4H6J

Identification of Cys 255 in HIF-1 as a novel site for development of covalent inhibitors of HIF-1 /ARNT PasB domain protein-protein interaction.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.52 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Identification of Cys255 in HIF-1 alpha as a novel site for development of covalent inhibitors of HIF-1 alpha /ARNT PasB domain protein-protein interaction.

Cardoso, R.Love, R.Nilsson, C.L.Bergqvist, S.Nowlin, D.Yan, J.Liu, K.K.Zhu, J.Chen, P.Deng, Y.L.Dyson, H.J.Greig, M.J.Brooun, A.

(2012) Protein Sci 21: 1885-1896

  • DOI: 10.1002/pro.2172
  • Primary Citation of Related Structures:  
    4H6J

  • PubMed Abstract: 
  • The heterodimer HIF-1α (hypoxia inducible factor)/HIF-β (also known as ARNT-aryl hydrocarbon nuclear translocator) is a key mediator of cellular response to hypoxia. The interaction between these monomer units can be modified by the action of small molecules in the binding interface between their C-terminal heterodimerization (PasB) domains ...

    The heterodimer HIF-1α (hypoxia inducible factor)/HIF-β (also known as ARNT-aryl hydrocarbon nuclear translocator) is a key mediator of cellular response to hypoxia. The interaction between these monomer units can be modified by the action of small molecules in the binding interface between their C-terminal heterodimerization (PasB) domains. Taking advantage of the presence of several cysteine residues located in the allosteric cavity of HIF-1α PasB domain, we applied a cysteine-based reactomics "hotspot identification" strategy to locate regions of HIF-1α PasB domain critical for its interaction with ARNT. COMPOUND 5 was identified using a mass spectrometry-based primary screening strategy and was shown to react specifically with Cys255 of the HIF-1α PasB domain. Biophysical characterization of the interaction between PasB domains of HIF-1α and ARNT revealed that covalent binding of COMPOUND 5 to Cys255 reduced binding affinity between HIF-1α and ARNT PasB domains approximately 10-fold. Detailed NMR structural analysis of HIF-1α-PasB-COMPOUND 5 conjugate showed significant local conformation changes in the HIF-1α associated with key residues involved in the HIF-1α/ARNT PasB domain interaction as revealed by the crystal structure of the HIF-1α/ARNT PasB heterodimer. Our screening strategy could be applied to other targets to identify pockets surrounding reactive cysteines suitable for development of small molecule modulators of protein function.


    Organizational Affiliation

    Oncology Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HYPOXIA INDUCIBLE FACTOR 1-ALPHAA113Homo sapiensMutation(s): 1 
Gene Names: HIF-1 alphaHIF1ABHLHE78MOP1PASD8
UniProt & NIH Common Fund Data Resources
Find proteins for Q16665 (Homo sapiens)
Explore Q16665 
Go to UniProtKB:  Q16665
PHAROS:  Q16665
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ARYL HYDROCARBON NUCLEAR TRANSLOCATORB116Homo sapiensMutation(s): 1 
Gene Names: ARNTBHLHE2
UniProt & NIH Common Fund Data Resources
Find proteins for P27540 (Homo sapiens)
Explore P27540 
Go to UniProtKB:  P27540
PHAROS:  P27540
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.52 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.841α = 90
b = 44.94β = 96.54
c = 78.087γ = 90
Software Package:
Software NamePurpose
CNSrefinement
CNXrefinement
PROCESSdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-12-05
    Type: Initial release
  • Version 1.1: 2013-08-28
    Changes: Database references
  • Version 1.2: 2018-01-24
    Changes: Structure summary