3DKF

Structure of MET receptor tyrosine kinase in complex with inhibitor SGX-523


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

SGX523 is an exquisitely selective, ATP-competitive inhibitor of the MET receptor tyrosine kinase with antitumor activity in vivo.

Buchanan, S.G.Hendle, J.Lee, P.S.Smith, C.R.Bounaud, P.Y.Jessen, K.A.Tang, C.M.Huser, N.H.Felce, J.D.Froning, K.J.Peterman, M.C.Aubol, B.E.Gessert, S.F.Sauder, J.M.Schwinn, K.D.Russell, M.Rooney, I.A.Adams, J.Leon, B.C.Do, T.H.Blaney, J.M.Sprengeler, P.A.Thompson, D.A.Smyth, L.Pelletier, L.A.Atwell, S.Holme, K.Wasserman, S.R.Emtage, S.Burley, S.K.Reich, S.H.

(2009) Mol.Cancer Ther. 8: 3181-3190

  • DOI: 10.1158/1535-7163.MCT-09-0477
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The MET receptor tyrosine kinase has emerged as an important target for the development of novel cancer therapeutics. Activation of MET by mutation or gene amplification has been linked to kidney, gastric, and lung cancers. In other cancers, such as ...

    The MET receptor tyrosine kinase has emerged as an important target for the development of novel cancer therapeutics. Activation of MET by mutation or gene amplification has been linked to kidney, gastric, and lung cancers. In other cancers, such as glioblastoma, autocrine activation of MET has been demonstrated. Several classes of ATP-competitive inhibitor have been described, which inhibit MET but also other kinases. Here, we describe SGX523, a novel, ATP-competitive kinase inhibitor remarkable for its exquisite selectivity for MET. SGX523 potently inhibited MET with an IC50 of 4 nmol/L and is >1,000-fold selective versus the >200-fold selectivity of other protein kinases tested in biochemical assays. Crystallographic study revealed that SGX523 stabilizes MET in a unique inactive conformation that is inaccessible to other protein kinases, suggesting an explanation for the selectivity. SGX523 inhibited MET-mediated signaling, cell proliferation, and cell migration at nanomolar concentrations but had no effect on signaling dependent on other protein kinases, including the closely related RON, even at micromolar concentrations. SGX523 inhibition of MET in vivo was associated with the dose-dependent inhibition of growth of tumor xenografts derived from human glioblastoma and lung and gastric cancers, confirming the dependence of these tumors on MET catalytic activity. Our results show that SGX523 is the most selective inhibitor of MET catalytic activity described to date and is thus a useful tool to investigate the role of MET kinase in cancer without the confounding effects of promiscuous protein kinase inhibition.


    Organizational Affiliation

    SGX Pharmaceuticals, San Diego, CA 92121, USA. buchanan_sean@lilly.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hepatocyte growth factor receptor
A
317Homo sapiensMutation(s): 3 
Gene Names: MET
EC: 2.7.10.1
Find proteins for P08581 (Homo sapiens)
Go to Gene View: MET
Go to UniProtKB:  P08581
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SX8
Query on SX8

Download SDF File 
Download CCD File 
A
6-{[6-(1-methyl-1H-pyrazol-4-yl)[1,2,4]triazolo[4,3-b]pyridazin-3-yl]sulfanyl}quinoline
C18 H13 N7 S
BCZUAADEACICHN-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SX8Kd: 0.2 - 3.9 nM (99) BINDINGDB
SX8IC50: 3.1 - <10 nM (99) BINDINGDB
SX8IC50: 4 nM BINDINGMOAD
SX8Ki: 2.7 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.089α = 90.00
b = 46.679β = 90.00
c = 158.482γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-06-24 
  • Released Date: 2009-07-07 
  • Deposition Author(s): Hendle, J.

Revision History 

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2015-04-22
    Type: Structure summary