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 

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

  • 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 com ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase ITK/TSK
A
267Homo sapiensMutation(s): 2 
Gene Names: ITK (EMT, LYK)
EC: 2.7.10.2
Find proteins for Q08881 (Homo sapiens)
Go to Gene View: ITK
Go to UniProtKB:  Q08881
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
IAQ
Query on IAQ

Download SDF File 
Download 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
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IAQIC50: 1.93 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 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 46.340α = 90.00
b = 69.350β = 115.70
c = 47.270γ = 90.00
Software Package:
Software NamePurpose
AutoPROCdata scaling
REFMACrefinement
AutoPROCdata collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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