3IO7

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.199 

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
  • Primary Citation of Related Structures:  

  • 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 JAK2
A
313Homo sapiensMutation(s): 0 
Gene Names: JAK2
EC: 2.7.10.2
Find proteins for O60674 (Homo sapiens)
Go to Gene View: JAK2
Go to UniProtKB:  O60674
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1P5
Query on 1P5

Download SDF File 
Download CCD File 
A
(3S)-1-[6-(2-aminopyrazolo[1,5-a]pyrimidin-3-yl)pyrimidin-4-yl]-N,N-diethylpiperidine-3-carboxamide
C20 H26 N8 O
DKQKJWFBAJGEBC-AWEZNQCLSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
A
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1P5Ki: 7 nM (100) BINDINGDB
1P5IC50: >20000 nM (100) BINDINGDB
1P5Ki: 17 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.199 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 93.922α = 90.00
b = 101.752β = 90.00
c = 67.194γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
SCALEPACKdata scaling
BOSdata collection
REFMACrefinement
DENZOdata reduction
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description