3T9T

Crystal structure of BTK mutant (F435T,K596R) complexed with Imidazo[1,5-a]quinoxaline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Imidazo[1,5-a]quinoxalines as irreversible BTK inhibitors for the treatment of rheumatoid arthritis.

Kim, K.H.Maderna, A.Schnute, M.E.Hegen, M.Mohan, S.Miyashiro, J.Lin, L.Li, E.Keegan, S.Lussier, J.Wrocklage, C.Nickerson-Nutter, C.L.Wittwer, A.J.Soutter, H.Caspers, N.Han, S.Kurumbail, R.Dunussi-Joannopoulos, K.Douhan, J.Wissner, A.

(2011) Bioorg Med Chem Lett 21: 6258-6263

  • DOI: 10.1016/j.bmcl.2011.09.008
  • Primary Citation of Related Structures:  
    3T9T

  • PubMed Abstract: 
  • Imidazo[1,5-a]quinoxalines were synthesized that function as irreversible Bruton's tyrosine kinase (BTK) inhibitors. The syntheses and SAR of this series of compounds are presented as well as the X-ray crystal structure of the lead compound 36 in complex with a gate-keeper variant of ITK enzyme ...

    Imidazo[1,5-a]quinoxalines were synthesized that function as irreversible Bruton's tyrosine kinase (BTK) inhibitors. The syntheses and SAR of this series of compounds are presented as well as the X-ray crystal structure of the lead compound 36 in complex with a gate-keeper variant of ITK enzyme. The lead compound showed good in vivo efficacy in preclinical RA models.


    Organizational Affiliation

    Medicinal Chemistry, Pfizer, 200 Cambridge Park Drive, Cambridge, MA 02140, United States. khkim87@hotmail.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase ITK/TSK A267Homo sapiensMutation(s): 2 
Gene Names: ITKEMTLYK
EC: 2.7.10.2
Find proteins for Q08881 (Homo sapiens)
Explore Q08881 
Go to UniProtKB:  Q08881
NIH Common Fund Data Resources
PHAROS:  Q08881
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IAQ
Query on IAQ

Download Ideal Coordinates CCD File 
A
(2Z)-4-(dimethylamino)-N-{7-fluoro-4-[(2-methylphenyl)amino]imidazo[1,5-a]quinoxalin-8-yl}-N-methylbut-2-enamide
C24 H25 F N6 O
YMSXHRWUGLAAKL-YFHOEESVSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IAQIC50 :  1.9299999475479126   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.34α = 90
b = 69.35β = 115.7
c = 47.27γ = 90
Software Package:
Software NamePurpose
AutoPROCdata collection
PHASERphasing
REFMACrefinement
AutoPROCdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2011-08-03 
  • Released Date: 2011-10-12 
  • Deposition Author(s): Han, S., Caspers, N.

Revision History  (Full details and data files)

  • Version 1.0: 2011-10-12
    Type: Initial release
  • Version 1.1: 2011-10-26
    Changes: Database references