1XKK

EGFR kinase domain complexed with a quinazoline inhibitor- GW572016


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

A unique structure for epidermal growth factor receptor bound to GW572016 (Lapatinib): relationships among protein conformation, inhibitor off-rate, and receptor activity in tumor cells.

Wood, E.R.Truesdale, A.T.McDonald, O.B.Yuan, D.Hassell, A.Dickerson, S.H.Ellis, B.Pennisi, C.Horne, E.Lackey, K.Alligood, K.J.Rusnak, D.W.Gilmer, T.M.Shewchuk, L.

(2004) Cancer Res 64: 6652-6659

  • DOI: https://doi.org/10.1158/0008-5472.CAN-04-1168
  • Primary Citation of Related Structures:  
    1XKK

  • PubMed Abstract: 

    GW572016 (Lapatinib) is a tyrosine kinase inhibitor in clinical development for cancer that is a potent dual inhibitor of epidermal growth factor receptor (EGFR, ErbB-1) and ErbB-2. We determined the crystal structure of EGFR bound to GW572016. The compound is bound to an inactive-like conformation of EGFR that is very different from the active-like structure bound by the selective EGFR inhibitor OSI-774 (Tarceva) described previously. Surprisingly, we found that GW572016 has a very slow off-rate from the purified intracellular domains of EGFR and ErbB-2 compared with OSI-774 and another EGFR selective inhibitor, ZD-1839 (Iressa). Treatment of tumor cells with these inhibitors results in down-regulation of receptor tyrosine phosphorylation. We evaluated the duration of the drug effect after washing away free compound and found that the rate of recovery of receptor phosphorylation in the tumor cells reflected the inhibitor off-rate from the purified intracellular domain. The slow off-rate of GW572016 correlates with a prolonged down-regulation of receptor tyrosine phosphorylation in tumor cells. The differences in the off-rates of these drugs and the ability of GW572016 to inhibit ErbB-2 can be explained by the enzyme-inhibitor structures.


  • Organizational Affiliation

    Department of Computational, Analytical and Structural Sciences, GlaxoSmithKline, Inc., Research Triangle Park, North Carolina 27709, USA. ew39216@gsk.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Epidermal growth factor receptor352Homo sapiensMutation(s): 0 
Gene Names: EGFRERBB1
EC: 2.7.1.112 (PDB Primary Data), 2.7.10.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P00533 (Homo sapiens)
Explore P00533 
Go to UniProtKB:  P00533
PHAROS:  P00533
GTEx:  ENSG00000146648 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00533
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
FMM PDBBind:  1XKK Ki: 3 (nM) from 1 assay(s)
BindingDB:  1XKK Ki: 3 (nM) from 1 assay(s)
Kd: min: 0.92, max: 2800 (nM) from 15 assay(s)
IC50: min: 0.06, max: 433 (nM) from 36 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.653α = 90
b = 67.144β = 90
c = 102.88γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2004-12-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description