5IU2

Discovery of imidazoquinolines as a novel class of potent, selective and in vivo efficacious COT kinase inhibitors


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Discovery of Imidazoquinolines as a Novel Class of Potent, Selective, and in Vivo Efficacious Cancer Osaka Thyroid (COT) Kinase Inhibitors.

Glatthar, R.Stojanovic, A.Troxler, T.Mattes, H.Mobitz, H.Beerli, R.Blanz, J.Gassmann, E.Druckes, P.Fendrich, G.Gutmann, S.Martiny-Baron, G.Spence, F.Hornfeld, J.Peel, J.E.Sparrer, H.

(2016) J.Med.Chem. 59: 7544-7560

  • DOI: 10.1021/acs.jmedchem.6b00598

  • PubMed Abstract: 
  • Cancer Osaka thyroid (COT) kinase is an important regulator of pro-inflammatory cytokines in macrophages. Thus, pharmacologic inhibition of COT should be a valid approach to therapeutically intervene in the pathogenesis of macrophage-driven inflammat ...

    Cancer Osaka thyroid (COT) kinase is an important regulator of pro-inflammatory cytokines in macrophages. Thus, pharmacologic inhibition of COT should be a valid approach to therapeutically intervene in the pathogenesis of macrophage-driven inflammatory diseases such as rheumatoid arthritis. We report the discovery and chemical optimization of a novel series of COT kinase inhibitors, with unprecedented nanomolar potency for the inhibition of TNFα. Pharmacological profiling in vivo revealed a high metabolism of these compounds in rats which was demonstrated to be predominantly attributed to aldehyde oxidase. Due to the very low activity of hepatic AO in the dog, the selected candidate 32 displayed significant blood exposure in dogs which resulted in a clear prevention of inflammation-driven lameness. Taken together, the described compounds both potently and selectively inhibit COT kinase in primary human cells and ameliorate inflammatory pathologies in vivo, supporting the notion that COT is an appropriate therapeutic target for inflammatory diseases.


    Organizational Affiliation

    Global Discovery Chemistry, ‡Analytical Sciences, §Center for Proteomic Chemistry, ∥Preclinical Safety, and ⊥Autoimmunity Transplantation Inflammation, Novartis Institutes for BioMedical Research , CH-4002 Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitogen-activated protein kinase kinase kinase 8
A, B
332Homo sapiensMutation(s): 0 
Gene Names: MAP3K8 (COT, ESTF)
EC: 2.7.11.25
Find proteins for P41279 (Homo sapiens)
Go to Gene View: MAP3K8
Go to UniProtKB:  P41279
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
6DA
Query on 6DA

Download SDF File 
Download CCD File 
A, B
N-[2-(morpholin-4-yl)ethyl]-6-(8-phenyl-1H-imidazo[4,5-c][1,7]naphthyridin-1-yl)-1,3-benzothiazol-2-amine
C28 H25 N7 O S
WJOPLUBIUOVUKG-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
6DAIC50: 16 - 2500 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.233 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.480α = 90.00
b = 87.430β = 90.00
c = 125.120γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata reduction
XSCALEdata scaling
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2016-09-07
    Type: Database references