4FZ7

Crystal structure of spleen tyrosine kinase complexed with 6-((1R,2S)-2-Amino-cyclohexylamino)-4-(6-ethyl-pyridin-2-ylamino)-pyridazine-3-carboxylic acid amide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Using ovality to predict nonmutagenic, orally efficacious pyridazine amides as cell specific spleen tyrosine kinase inhibitors.

Lucas, M.C.Bhagirath, N.Chiao, E.Goldstein, D.M.Hermann, J.C.Hsu, P.Y.Kirchner, S.Kennedy-Smith, J.J.Kuglstatter, A.Lukacs, C.Menke, J.Niu, L.Padilla, F.Peng, Y.Polonchuk, L.Railkar, A.Slade, M.Soth, M.Xu, D.Yadava, P.Yee, C.Zhou, M.Liao, C.

(2014) J Med Chem 57: 2683-2691

  • DOI: 10.1021/jm401982j
  • Primary Citation of Related Structures:  
    4FZ7

  • PubMed Abstract: 
  • Inhibition of spleen tyrosine kinase has attracted much attention as a mechanism for the treatment of cancers and autoimmune diseases such as asthma, rheumatoid arthritis, and systemic lupus erythematous. We report the structure-guided optimization o ...

    Inhibition of spleen tyrosine kinase has attracted much attention as a mechanism for the treatment of cancers and autoimmune diseases such as asthma, rheumatoid arthritis, and systemic lupus erythematous. We report the structure-guided optimization of pyridazine amide spleen tyrosine kinase inhibitors. Early representatives of this scaffold were highly potent and selective but mutagenic in an Ames assay. An approach that led to the successful identification of nonmutagenic examples, as well as further optimization to compounds with reduced cardiovascular liabilities is described. Select pharmacokinetic and in vivo efficacy data are presented.


    Organizational Affiliation

    Hoffmann-La Roche Inc., pRED, Pharma Research & Early Development, Small Molecule Research, 340 Kingsland Street, Nutley, New Jersey 07110, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase SYKA291Homo sapiensMutation(s): 0 
Gene Names: SYK
EC: 2.7.10.2
Find proteins for P43405 (Homo sapiens)
Explore P43405 
Go to UniProtKB:  P43405
NIH Common Fund Data Resources
PHAROS  P43405
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0VH
Query on 0VH

Download CCD File 
A
6-{[(1R,2S)-2-aminocyclohexyl]amino}-4-[(6-ethylpyridin-2-yl)amino]pyridazine-3-carboxamide
C18 H25 N7 O
WDVJRXQKCPLXTN-QWHCGFSZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0VHIC50:  79   nM  BindingDB
0VHIC50:  3.200000047683716   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.63α = 90
b = 84.977β = 90
c = 88.607γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-10
    Type: Initial release
  • Version 1.1: 2019-07-17
    Changes: Data collection, Database references, Refinement description