5TKD

CRYSTAL STRUCTURE OF TYROSINE KINASE 2 JH2 (PSEUDO KINASE DOMAIN) COMPLEXED WITH 6-[(3,5-DIMETHYLPHE NYL)AMINO]-8- (METHYLAMINO)IMIDAZO[1,2-B]PYRIDAZINE-3-CARBO XAMIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Identification of imidazo[1,2-b]pyridazine TYK2 pseudokinase ligands as potent and selective allosteric inhibitors of TYK2 signalling.

Moslin, R.Gardner, D.Santella, J.Zhang, Y.Duncia, J.V.Liu, C.Lin, J.Tokarski, J.S.Strnad, J.Pedicord, D.Chen, J.Blat, Y.Zupa-Fernandez, A.Cheng, L.Sun, H.Chaudhry, C.Huang, C.D'Arienzo, C.Sack, J.S.Muckelbauer, J.K.Chang, C.Tredup, J.Xie, D.Aranibar, N.Burke, J.R.Carter, P.H.Weinstein, D.S.

(2017) Medchemcomm 8: 700-712

  • DOI: 10.1039/c6md00560h
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • As a member of the Janus (JAK) family of non-receptor tyrosine kinases, TYK2 mediates the signaling of pro-inflammatory cytokines including IL-12, IL-23 and type 1 interferon (IFN), and therefore represents an attractive potential target for treating ...

    As a member of the Janus (JAK) family of non-receptor tyrosine kinases, TYK2 mediates the signaling of pro-inflammatory cytokines including IL-12, IL-23 and type 1 interferon (IFN), and therefore represents an attractive potential target for treating the various immuno-inflammatory diseases in which these cytokines have been shown to play a role. Following up on our previous report that ligands to the pseudokinase domain (JH2) of TYK2 suppress cytokine-mediated receptor activation of the catalytic (JH1) domain, the imidazo[1,2- b ]pyridazine (IZP) 7 was identified as a promising hit compound. Through iterative modification of each of the substituents of the IZP scaffold, the cellular potency was improved while maintaining selectivity over the JH1 domain. These studies led to the discovery of the JH2-selective TYK2 inhibitor 29 , which provided encouraging systemic exposures after oral dosing in mice. Phosphodiesterase 4 (PDE4) was identified as an off-target and potential liability of the IZP ligands, and selectivity for TYK2 JH2 over this enzyme was obtained by elaborating along selectivity vectors determined from analyses of X-ray co-crystal structures of representative ligands of the IZP class bound to both proteins.


    Organizational Affiliation

    Bristol-Myers Squibb Research , Princeton , New Jersey , USA . Email: ryan.moslin@bms.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Non-receptor tyrosine-protein kinase TYK2
A, B
298Homo sapiensMutation(s): 0 
Gene Names: TYK2
EC: 2.7.10.2
Find proteins for P29597 (Homo sapiens)
Go to Gene View: TYK2
Go to UniProtKB:  P29597
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
7GL
Query on 7GL

Download SDF File 
Download CCD File 
A, B
6-[(3,5-dimethylphenyl)amino]-8-(methylamino)imidazo[1,2-b]pyridazine-3-carboxamide
C16 H18 N6 O
SNVFFECYFQEWTL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 69.599α = 90.00
b = 65.702β = 112.42
c = 74.702γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PDB_EXTRACTdata extraction
SCALAdata scaling
PHASERphasing
BUSTER-TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-10-06 
  • Released Date: 2016-12-28 
  • Deposition Author(s): Muckelbauer, J.K.

Revision History 

  • Version 1.0: 2016-12-28
    Type: Initial release
  • Version 1.1: 2018-08-29
    Type: Data collection, Database references