3IOK

2-Aminopyrazolo[1,5-a]pyrimidines as potent and selective inhibitors of JAK2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

2-Aminopyrazolo[1,5-a]pyrimidines as potent and selective inhibitors of JAK2.

Ledeboer, M.W.Pierce, A.C.Duffy, J.P.Gao, H.Messersmith, D.Salituro, F.G.Nanthakumar, S.Come, J.Zuccola, H.J.Swenson, L.Shlyakter, D.Mahajan, S.Hoock, T.Fan, B.Tsai, W.J.Kolaczkowski, E.Carrier, S.Hogan, J.K.Zessis, R.Pazhanisamy, S.Bennani, Y.L.

(2009) Bioorg Med Chem Lett 19: 6529-6533

  • DOI: 10.1016/j.bmcl.2009.10.053
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Constitutive activation of the EPO/JAK2 signaling cascade has recently been implicated in a variety of myeloproliferative disorders including polycythemia vera, essential thrombocythemia and myelofibrosis. In an effort to uncover therapeutic potentia ...

    Constitutive activation of the EPO/JAK2 signaling cascade has recently been implicated in a variety of myeloproliferative disorders including polycythemia vera, essential thrombocythemia and myelofibrosis. In an effort to uncover therapeutic potential of blocking the EPO/JAK2 signaling cascade, we sought to discover selective inhibitors that block the kinase activity of JAK2. Herein, we describe the discovery and structure based optimization of a novel series of 2-amino-pyrazolo[1,5-a]pyrimidines that exhibit potent inhibition of JAK2.


    Organizational Affiliation

    Vertex Pharmaceuticals Inc, Cambridge, MA 02139-4242, United States. mark_ledeboer@vrtx.com



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase JAK2A313Homo sapiensMutation(s): 0 
Gene Names: JAK2
EC: 2.7.10.2
Find proteins for O60674 (Homo sapiens)
Explore O60674 
Go to UniProtKB:  O60674
NIH Common Fund Data Resources
PHAROS  O60674
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1P6
Query on 1P6

Download CCD File 
A
3-(6-{[(1S)-1-(4-fluorophenyl)ethyl]amino}pyrimidin-4-yl)pyrazolo[1,5-a]pyrimidin-2-amine
C18 H16 F N7
PNFXHJHLWYEAPD-NSHDSACASA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
AL-PEPTIDE LINKINGC9 H12 N O6 PTYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1P6Ki :  11   nM  PDBBind
1P6Ki:  0.19999998807907104   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.228 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.512α = 90
b = 102.546β = 90
c = 67.602γ = 90
Software Package:
Software NamePurpose
d*TREKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
BOSdata collection
d*TREKdata reduction
REFMACphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-04-03
    Changes: Experimental preparation