Crystal structure of human VEGFR2 kinase domain with Compound A.

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.247 

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.2 of the entry. See complete history


A Back-to-Front Fragment-Based Drug Design Search Strategy Targeting the DFG-Out Pocket of Protein Tyrosine Kinases.

Iwata, H.Oki, H.Okada, K.Takagi, T.Tawada, M.Miyazaki, Y.Imamura, S.Hori, A.Lawson, J.D.Hixon, M.S.Kimura, H.Miki, H.

(2012) ACS Med Chem Lett 3: 342-346

  • DOI: https://doi.org/10.1021/ml3000403
  • Primary Citation of Related Structures:  
    3VHK, 3VID

  • PubMed Abstract: 

    We present a straightforward process for the discovery of novel back pocket-binding fragment molecules against protein tyrosine kinases. The approach begins by screening against the nonphosphorylated target kinase with subsequent counterscreening of hits against the phosphorylated enzyme. Back pocket-binding fragments are inactive against the phosphorylated kinase. Fragment molecules are of insufficient size to span both regions of the ATP binding pocket; thus, the outcome is binary (back pocket-binding or hinge-binding). Next, fragments with the appropriate binding profile are assayed in combination with a known hinge-binding fragment and subsequently with a known back pocket-binding fragment. Confirmation of back pocket-binding by Yonetani-Theorell plot analysis progresses candidate fragments to crystallization trials. The method is exemplified by a fragment screening campaign against vascular endothelial growth factor receptor 2, and a novel back pocket-binding fragment is presented.

  • Organizational Affiliation

    Discovery Research Laboratories, Oncology Drug Discovery Unit, Pharmaceutical Research Division, Takeda Pharmaceutical Company Ltd. , 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Vascular endothelial growth factor receptor 2356Homo 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 4TT

Download Ideal Coordinates CCD File 
B [auth A]4,5,6,11-tetrahydro-1H-pyrazolo[4',3':6,7]cyclohepta[1,2-b]indole
C14 H13 N3
Binding Affinity Annotations 
IDSourceBinding Affinity
4TT PDBBind:  3VID IC50: 620 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.247 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.24α = 90
b = 94.62β = 90
c = 96.37γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
CrystalCleardata reduction
CrystalCleardata scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-08-15
    Type: Initial release
  • Version 1.1: 2015-04-22
    Changes: Database references
  • Version 1.2: 2024-03-20
    Changes: Data collection, Database references, Derived calculations