3ITZ

Crystal Structure of p38a Mitogen-Activated Protein Kinase in Complex with a Pyrazolopyridazine Inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Part 2: Structure-activity relationship (SAR) investigations of fused pyrazoles as potent, selective and orally available inhibitors of p38alpha mitogen-activated protein kinase.

Wurz, R.P., Pettus, L.H., Henkle, B., Sherman, L., Plant, M., Miner, K., McBride, H.J., Wong, L.M., Saris, C.J., Lee, M.R., Chmait, S., Mohr, C., Hsieh, F., Tasker, A.S.

(2010) Bioorg.Med.Chem.Lett. 20: 1680-1684

  • DOI: 10.1016/j.bmcl.2010.01.059

  • PubMed Abstract: 

    • A novel class of pyrazolopyridazine p38alpha mitogen-activated protein kinase (MAPK) inhibitors is disclosed. A structure activity relationship (SAR) investigation was conducted driven by the ability of these compounds to inhibit the p38alpha enzyme, ...

    A novel class of pyrazolopyridazine p38alpha mitogen-activated protein kinase (MAPK) inhibitors is disclosed. A structure activity relationship (SAR) investigation was conducted driven by the ability of these compounds to inhibit the p38alpha enzyme, the secretion of TNFalpha in a LPS-challenged THP1 cell line and TNFalpha-induced production of IL-8 in the presence of 50% human whole blood (hWB). This study resulted in the discovery of several inhibitors with IC(50) values in the single-digit nanomolar range in hWB. Further investigation of the pharmacokinetic profiles of these lead compounds led to the identification of three potent and orally bioavailable p38alpha inhibitors 2h, 2m, and 13h. Inhibitor 2m was found to be highly selective for p38alpha/beta over a panel of 402 other kinases in Ambit screening, and was highly efficacious in vivo in the inhibition of TNFalpha production in LPS-stimulated Lewis rats with an ED(50) of ca. 0.08mg/kg.

    Organizational Affiliation: 

    Department of Chemistry Research & Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA 91320, USA. rwurz@amgen.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitogen-activated protein kinase 14
A
366Homo sapiensMutation(s): 0 
Gene Names: MAPK14 (CSBP, CSBP1, CSBP2, CSPB1, MXI2, SAPK2A)
EC: 2.7.11.24
Find proteins for Q16539 (Homo sapiens)
Go to Gene View: MAPK14
Go to UniProtKB:  Q16539
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P66
Query on P66
Download SDF File 
Download CCD File 
A
4-chloro-N-cyclopropyl-3-{[1-(2,6-difluorophenyl)-1H-pyrazolo[3,4-d]pyridazin-4-yl]amino}benzamide
C21 H15 Cl F2 N6 O
ZWVCUFJZBBAOFI-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
P66IC50: 1.4 - 4 nM (100) BINDINGDB
P66IC50: 1.4 nM BINDINGMOAD
P66IC50: 1.4 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 45.245α = 90.00
b = 87.847β = 90.00
c = 121.258γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
ADSCdata collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2009-08-28 
  • Released Date: 2010-03-02 
  • Deposition Author(s): Mohr, C., Jordan, S.

Revision History 

  • Version 1.0: 2010-03-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance