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 
  • R-Value Observed: 0.193 

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:  
    5TKD, 5TKB

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Non-receptor tyrosine-protein kinase TYK2AB298Homo sapiensMutation(s): 0 
Gene Names: TYK2
EC: 2.7.10.2
Find proteins for P29597 (Homo sapiens)
Explore P29597 
Go to UniProtKB:  P29597
NIH Common Fund Data Resources
PHAROS  P29597
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
7GL
Query on 7GL

Download Ideal Coordinates 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
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 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 
  • R-Value Observed: 0.193 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.599α = 90
b = 65.702β = 112.42
c = 74.702γ = 90
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



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
    Changes: Data collection, Database references