Crystal Structure of Bruton's Tyrosine Kinase in complex with a substituted Cinnoline

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.179 

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Fragment-Based Discovery of a Small Molecule Inhibitor of Bruton's Tyrosine Kinase.

Smith, C.R.Dougan, D.R.Komandla, M.Kanouni, T.Knight, B.Lawson, J.D.Sabat, M.Taylor, E.R.Vu, P.Wyrick, C.

(2015) J Med Chem 58: 5437-5444

  • DOI: https://doi.org/10.1021/acs.jmedchem.5b00734
  • Primary Citation of Related Structures:  
    4Z3V, 4ZLY, 4ZLZ

  • PubMed Abstract: 

    The discovery and optimization of a series of 4-aminocinnoline-3-carboxamide inhibitors of Bruton's tyrosine kinase are reported. A fragment-based screening approach incorporating X-ray co-crystallography was used to identify a cinnoline fragment and characterize its binding mode in the ATP binding site of Btk. Optimization of the fragment hit resulted in the identification of a lead compound which reduced paw swelling in a dose- and exposure-dependent fashion in a rat model of collagen-induced arthritis.

  • Organizational Affiliation

    Takeda California, 10410 Science Center Drive, San Diego, California 92121, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tyrosine-protein kinase BTK270Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q06187 (Homo sapiens)
Explore Q06187 
Go to UniProtKB:  Q06187
PHAROS:  Q06187
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06187
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
4RV Binding MOAD:  4ZLZ IC50: 100 (nM) from 1 assay(s)
BindingDB:  4ZLZ IC50: 1.00e+5 (nM) from 1 assay(s)
EC50: 2.86e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.909α = 90
b = 103.788β = 90
c = 38.032γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2015-07-01 
  • Deposition Author(s): Dougan, D.R.

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2015-08-05
    Changes: Database references, Other