Crystal structure of human tyrosine-protein kinase Fes/Fps in complex with compound 4

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Discovery of Novel Pyrido-pyridazinone Derivatives as FER Tyrosine Kinase Inhibitors with Antitumor Activity.

Taniguchi, T.Inagaki, H.Baba, D.Yasumatsu, I.Toyota, A.Kaneta, Y.Kiga, M.Iimura, S.Odagiri, T.Shibata, Y.Ueda, K.Seo, M.Shimizu, H.Imaoka, T.Nakayama, K.

(2019) ACS Med Chem Lett 10: 737-742

  • DOI: https://doi.org/10.1021/acsmedchemlett.8b00631
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    To obtain a new anticancer drug, we focused on FER tyrosine kinase. Starting with high-throughput screening with our in-house chemical library, compound 1 , which has a pyridine moiety, was found. Referring to their X-ray crystal structure with FES proto-oncogene tyrosine kinase, as a surrogate of FER followed by chemical modification including scaffold hopping of the pyridine template, we discovered pyrido-pyridazinone derivatives with potent FER kinase inhibitory activity. Here, we disclose the structure-activity relationship on the scaffold and representative compound 21 ( DS21360717 ), which showed in vivo antitumor efficacy in a subcutaneous tumor model.

  • Organizational Affiliation

    R&D Division, Daiichi Sankyo Co., Ltd., 1-2-58 Hiromachi, Shinagawa-ku, Tokyo 140-8710, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tyrosine-protein kinase Fes/Fps375Homo sapiensMutation(s): 0 
Gene Names: FESFPS
UniProt & NIH Common Fund Data Resources
Find proteins for P07332 (Homo sapiens)
Explore P07332 
Go to UniProtKB:  P07332
GTEx:  ENSG00000182511 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07332
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.79α = 90
b = 80.79β = 90
c = 131.668γ = 120
Software Package:
Software NamePurpose
HKL-2000data 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: 2019-06-12
    Type: Initial release
  • Version 1.1: 2023-11-22
    Changes: Data collection, Database references, Refinement description