Crystal structure of VEGFR2 in complex with a 2-anilino-5-aryl-oxazole inhibitor

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

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This is version 1.4 of the entry. See complete history


Discovery and evaluation of 2-anilino-5-aryloxazoles as a novel class of VEGFR2 kinase inhibitors.

Harris, P.A.Cheung, M.Hunter, R.N.Brown, M.L.Veal, J.M.Nolte, R.T.Wang, L.Liu, W.Crosby, R.M.Johnson, J.H.Epperly, A.H.Kumar, R.Luttrell, D.K.Stafford, J.A.

(2005) J Med Chem 48: 1610-1619

  • DOI: https://doi.org/10.1021/jm049538w
  • Primary Citation of Related Structures:  
    1Y6A, 1Y6B

  • PubMed Abstract: 

    A series of derivatives of 2-anilino-5-phenyloxazole (5) has been identified as inhibitors of VEGFR2 kinase. Herein we describe the structure-activity relationship (SAR) of this novel template. Optimization of both aryl rings led to very potent inhibitors at both the enzymatic and cellular levels. Oxazole 39 had excellent solubility and good oral PK when dosed as the bis-mesylate salt and demonstrated moderate in vivo efficacy against HT29 human colon tumor xenografts. X-ray crystallography confirmed the proposed binding mode, and comparison of oxazoles 39 and 46 revealed interesting differences in orientation of 2-pyridyl and 3-pyridyl rings, respectively, attached at the meta position of the 5-phenyl ring.

  • Organizational Affiliation

    GlaxoSmithKline, Five Moore Drive, Research Triangle Park, NC 27709, USA. Philip.A.Harris@gsk.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Vascular endothelial growth factor receptor 2366Homo sapiensMutation(s): 0 
Gene Names: KDRFLK1
UniProt & NIH Common Fund Data Resources
Find proteins for P35968 (Homo sapiens)
Explore P35968 
Go to UniProtKB:  P35968
PHAROS:  P35968
GTEx:  ENSG00000128052 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35968
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on AAX

Download Ideal Coordinates CCD File 
C25 H24 N4 O4 S
Binding Affinity Annotations 
IDSourceBinding Affinity
AAX Binding MOAD:  1Y6B IC50: 38 (nM) from 1 assay(s)
PDBBind:  1Y6B IC50: 38 (nM) from 1 assay(s)
BindingDB:  1Y6B IC50: 38 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.544α = 90
b = 94.333β = 90
c = 96.767γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2005-06-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references, Derived calculations