X-ray Structure of c-Met with triazolopyridazine Inhibitor.

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.236 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Discovery and Optimization of Triazolopyridazines as Potent and Selective Inhibitors of the c-Met Kinase.

Albrecht, B.K.Harmange, J.C.Bauer, D.Berry, L.Bode, C.Boezio, A.A.Chen, A.Choquette, D.Dussault, I.Fridrich, C.Hirai, S.Hoffman, D.Larrow, J.F.Kaplan-Lefko, P.Lin, J.Lohman, J.Long, A.M.Moriguchi, J.O'Connor, A.Potashman, M.H.Reese, M.Rex, K.Siegmund, A.Shah, K.Shimanovich, R.Springer, S.K.Teffera, Y.Yang, Y.Zhang, Y.Bellon, S.F.

(2008) J Med Chem 51: 2879-2882

  • DOI: https://doi.org/10.1021/jm800043g
  • Primary Citation of Related Structures:  
    3CCN, 3CD8

  • PubMed Abstract: 

    Tumorigenesis is a multistep process in which oncogenes play a key role in tumor formation, growth, and maintenance. MET was discovered as an oncogene that is activated by its ligand, hepatocyte growth factor. Deregulated signaling in the c-Met pathway has been observed in multiple tumor types. Herein we report the discovery of potent and selective triazolopyridazine small molecules that inhibit c-Met activity.

  • Organizational Affiliation

    Amgen Inc., Cambridge, MA 02139, USA. brian.albrecht@amgen.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hepatocyte growth factor receptor310Homo sapiensMutation(s): 1 
Gene Names: MET
UniProt & NIH Common Fund Data Resources
Find proteins for P08581 (Homo sapiens)
Explore P08581 
Go to UniProtKB:  P08581
GTEx:  ENSG00000105976 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08581
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on L5G

Download Ideal Coordinates CCD File 
B [auth A]7-methoxy-4-[(6-phenyl[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methoxy]quinoline
C22 H17 N5 O2
Binding Affinity Annotations 
IDSourceBinding Affinity
L5G PDBBind:  3CD8 IC50: 9 (nM) from 1 assay(s)
BindingDB:  3CD8 IC50: min: 9, max: 90 (nM) from 5 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.236 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.008α = 90
b = 43.208β = 90
c = 158.219γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
DENZOdata 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: 2008-04-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description