5WIN

JAK2 Pseudokinase in complex with JNJ7706621

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.221 

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Literature

Discovery and Structural Characterization of ATP-Site Ligands for the Wild-Type and V617F Mutant JAK2 Pseudokinase Domain.

McNally, R., Li, Q., Li, K., Dekker, C., Vangrevelinghe, E., Jones, M., Chene, P., Machauer, R., Radimerski, T., Eck, M.J.

(2019) ACS Chem Biol 14: 587-593

  • DOI: 10.1021/acschembio.8b00722
  • Primary Citation of Related Structures:  
    5WIJ, 5WIK, 5WIL, 5WIM, 5WIN, 6D2I, 6G3C

  • PubMed Abstract: 

    • The oncogenic V617F mutation lies in the pseudokinase domain of JAK2, marking it as a potential target for development of compounds that might inhibit the pathogenic activity of the mutant protein. We used differential scanning fluorimetry to identify compounds that bind the JAK2 pseudokinase domain ...

    The oncogenic V617F mutation lies in the pseudokinase domain of JAK2, marking it as a potential target for development of compounds that might inhibit the pathogenic activity of the mutant protein. We used differential scanning fluorimetry to identify compounds that bind the JAK2 pseudokinase domain. Crystal structures of five candidate compounds with the wild-type domain reveal their modes of binding. Exploration of analogs of screening hit BI-D1870 led to the identification of compound 2, a 123 nM ligand for the pseudokinase domain. Interestingly, crystal structures of the V617F domain in complex with two unrelated compounds reveal a conformation that is characteristic of the wild-type domain, rather than that previously observed for the V617F mutant. These structures suggest that certain ATP-site ligands can modulate the V617F allosteric site, thereby providing a mechanistic rationale for targeting the pseudokinase domain and a structural foundation for development of more potent and pseudokinase-selective compounds.

    Organizational Affiliation: 

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School and Department of Cancer Biology , Dana-Farber Cancer Institute , Boston , Massachusetts 02115 , United States.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase JAK2A277Homo sapiensMutation(s): 3 
Gene Names: JAK2
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for O60674 (Homo sapiens)
Explore O60674 
Go to UniProtKB:  O60674
PHAROS:  O60674
GTEx:  ENSG00000096968 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60674
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SKE
Query on SKE
Download Ideal Coordinates CCD File 
B [auth A]4-({5-amino-1-[(2,6-difluorophenyl)carbonyl]-1H-1,2,4-triazol-3-yl}amino)benzenesulfonamide
C15 H12 F2 N6 O3 S
KDKUVYLMPJIGKA-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
SKE BindingDB:  5WIN Ki: 2.20e+5 (nM) from 1 assay(s)
Kd: min: 31, max: 800 (nM) from 8 assay(s)
IC50: min: 2960, max: 1.11e+4 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.392α = 90
b = 60.772β = 90
c = 90.637γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-01
    Type: Initial release
  • Version 1.1: 2019-03-20
    Changes: Data collection, Database references
  • Version 1.2: 2019-05-01
    Changes: Data collection, Database references