CRYSTAL STRUCTURE OF TYROSINE KINASE 2 JH2 (PSEUDO KINASE DOMAIN) COMPLEXED WITH Compound_40 AKA 6-cyclopropaneamido-4-[(2-methanesulfonylphenyl)amino]-N-methylpyridine-3-carboxamide

Experimental Data Snapshot

  • Resolution: 2.73 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

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This is version 1.2 of the entry. See complete history


Identification ofN-Methyl Nicotinamide andN-Methyl Pyridazine-3-Carboxamide Pseudokinase Domain Ligands as Highly Selective Allosteric Inhibitors of Tyrosine Kinase 2 (TYK2).

Moslin, R.Zhang, Y.Wrobleski, S.T.Lin, S.Mertzman, M.Spergel, S.Tokarski, J.S.Strnad, J.Gillooly, K.McIntyre, K.W.Zupa-Fernandez, A.Cheng, L.Sun, H.Chaudhry, C.Huang, C.D'Arienzo, C.Heimrich, E.Yang, X.Muckelbauer, J.K.Chang, C.Tredup, J.Mulligan, D.Xie, D.Aranibar, N.Chiney, M.Burke, J.R.Lombardo, L.Carter, P.H.Weinstein, D.S.

(2019) J Med Chem 62: 8953-8972

  • DOI: https://doi.org/10.1021/acs.jmedchem.9b00443
  • Primary Citation of Related Structures:  
    6NZE, 6NZF, 6NZH

  • PubMed Abstract: 

    As a member of the Janus (JAK) family of nonreceptor tyrosine kinases, TYK2 plays an important role in mediating the signaling of pro-inflammatory cytokines including IL-12, IL-23, and type 1 interferons. The nicotinamide 4 , identified by a SPA-based high-throughput screen targeting the TYK2 pseudokinase domain, potently inhibits IL-23 and IFNα signaling in cellular assays. The described work details the optimization of this poorly selective hit ( 4 ) to potent and selective molecules such as 47 and 48 . The discoveries described herein were critical to the eventual identification of the clinical TYK2 JH2 inhibitor (see following report in this issue). Compound 48 provided robust inhibition in a mouse IL-12-induced IFNγ pharmacodynamic model as well as efficacy in an IL-23 and IL-12-dependent mouse colitis model. These results demonstrate the ability of TYK2 JH2 domain binders to provide a highly selective alternative to conventional TYK2 orthosteric inhibitors.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Non-receptor tyrosine-protein kinase TYK2
A, B
317Homo sapiensMutation(s): 0 
Gene Names: TYK2
UniProt & NIH Common Fund Data Resources
Find proteins for P29597 (Homo sapiens)
Explore P29597 
Go to UniProtKB:  P29597
PHAROS:  P29597
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29597
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on L9A

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C18 H20 N4 O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 2.73 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.71α = 90
b = 65.53β = 112.71
c = 74.43γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-24
    Type: Initial release
  • Version 1.1: 2019-11-06
    Changes: Data collection, Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description