Crystal structure of CLK1 in complex with furanopyrimidin VN412

Experimental Data Snapshot

  • Resolution: 1.49 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 

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Furo[3,2-b]pyridine: A Privileged Scaffold for Highly Selective Kinase Inhibitors and Effective Modulators of the Hedgehog Pathway.

Nemec, V.Hylsova, M.Maier, L.Flegel, J.Sievers, S.Ziegler, S.Schroder, M.Berger, B.T.Chaikuad, A.Valcikova, B.Uldrijan, S.Drapela, S.Soucek, K.Waldmann, H.Knapp, S.Paruch, K.

(2019) Angew Chem Int Ed Engl 58: 1062-1066

  • DOI: https://doi.org/10.1002/anie.201810312
  • Primary Citation of Related Structures:  
    6I5H, 6I5I, 6I5K, 6I5L

  • PubMed Abstract: 

    Reported is the identification of the furo[3,2-b]pyridine core as a novel scaffold for potent and highly selective inhibitors of cdc-like kinases (CLKs) and efficient modulators of the Hedgehog signaling pathway. Initially, a diverse target compound set was prepared by synthetic sequences based on chemoselective metal-mediated couplings, including assembly of the furo[3,2-b]pyridine scaffold by copper-mediated oxidative cyclization. Optimization of the subseries containing 3,5-disubstituted furo[3,2-b]pyridines afforded potent, cell-active, and highly selective inhibitors of CLKs. Profiling of the kinase-inactive subset of 3,5,7-trisubstituted furo[3,2-b]pyridines revealed sub-micromolar modulators of the Hedgehog pathway.

  • Organizational Affiliation

    Department of Chemistry, CZ-Openscreen, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dual specificity protein kinase CLK1339Homo sapiensMutation(s): 1 
Gene Names: CLK1CLK
UniProt & NIH Common Fund Data Resources
Find proteins for P49759 (Homo sapiens)
Explore P49759 
Go to UniProtKB:  P49759
PHAROS:  P49759
GTEx:  ENSG00000013441 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49759
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.49 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 
  • Space Group: I 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.219α = 90
b = 64.049β = 111.99
c = 83.535γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
Aimlessdata 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: 2019-01-16
    Type: Initial release
  • Version 1.1: 2019-01-23
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description