Focal Adhesion Kinase catalytic domain in complex with bis-anilino pyrimidine inhibitor

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 

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This is version 1.3 of the entry. See complete history


Crystal Structures of the Fak Kinase in Complex with Tae226 and Related Bis-Anilino Pyrimidine Inhibitors Reveal a Helical Dfg Conformation.

Lietha, D.Eck, M.J.

(2008) PLoS One 3: E3800

  • DOI: https://doi.org/10.1371/journal.pone.0003800
  • Primary Citation of Related Structures:  
    2JKK, 2JKM, 2JKO, 2JKQ

  • PubMed Abstract: 

    Focal Adhesion Kinase (FAK) is a non-receptor tyrosine kinase required for cell migration, proliferation and survival. FAK overexpression has been documented in diverse human cancers and is associated with a poor clinical outcome. Recently, a novel bis-anilino pyrimidine inhibitor, TAE226, was reported to efficiently inhibit FAK signaling, arrest tumor growth and invasion and prolong the life of mice with glioma or ovarian tumor implants. Here we describe the crystal structures of the FAK kinase bound to TAE226 and three related bis-anilino pyrimidine compounds. TAE226 induces a conformation of the N-terminal portion of the kinase activation loop that is only observed in FAK, but is distinct from the conformation in both the active and inactive states of the kinase. This conformation appears to require a glycine immediately N-terminal to the "DFG motif", which adopts a helical conformation stabilized by interactions with TAE226. The presence of a glycine residue in this position contributes to the specificity of TAE226 and related compounds for FAK. Our work highlights the fact that kinases can access conformational space that is not necessarily utilized for their native catalytic regulation, and that such conformations can explain and be exploited for inhibitor specificity.

  • Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, United States of America.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FOCAL ADHESION KINASE 1276Gallus gallusMutation(s): 0 
Find proteins for Q00944 (Gallus gallus)
Explore Q00944 
Go to UniProtKB:  Q00944
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ00944
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on BI9

Download Ideal Coordinates CCD File 
C23 H25 Cl N6 O3
Query on SO4

Download Ideal Coordinates CCD File 
O4 S
Binding Affinity Annotations 
IDSourceBinding Affinity
BI9 BindingDB:  2JKK IC50: min: 5.4, max: 7 (nM) from 7 assay(s)
Binding MOAD:  2JKK IC50: 6.24 (nM) from 1 assay(s)
PDBBind:  2JKK IC50: 6.24 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.135α = 90
b = 45.153β = 94.7
c = 67.457γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-04-03
    Changes: Data collection, Other, Source and taxonomy
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description