Cited by 146Protein Degradation and InhibitorsUbiquitin and proteasome pathwaysChemical Synthesis and Analysis

Highly Selective PTK2 Proteolysis Targeting Chimeras to Probe Focal Adhesion Kinase Scaffolding Functions

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Popow, Johannes, Arnhof, Heribert, Bader, Gerd, Berger, Helmut, Ciulli, Alessio, Covini, David, Dank, Christian, Gmaschitz, Teresa +16 more·2019·Journal of Medicinal Chemistry

Abstract

Focal adhesion tyrosine kinase (PTK2) is often overexpressed in human hepatocellular carcinoma (HCC), and several reports have linked PTK2 depletion and/or pharmacological inhibition to reduced tumorigenicity. However, the clinical relevance of targeting PTK2 still remains to be proven. Here, we present two highly selective and functional PTK2 proteolysis-targeting chimeras utilizing von Hippel–Lindau and cereblon ligands to hijack E3 ligases for PTK2 degradation. BI-3663 (cereblon-based) degrades PTK2 with a median DC 50 of 30 nM to >80% across a panel of 11 HCC cell lines. Despite effective PTK2 degradation, these compounds did not phenocopy the reported antiproliferative effects of PTK2 depletion in any of the cell lines tested. By disclosing these compounds, we hope to provide valuable tools for the study of PTK2 degradation across different biological systems.

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Crossref · 10.1021/acs.jmedchem.8b01826

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Authors
Popow, J., Arnhof, H., Bader, G., Berger, H., Ciulli, A., Covini, D., Dank, C., Gmaschitz, T., Greb, P., Karolyi-Özguer, J., Koegl, M., McConnell, D. B., Pearson, M., Rieger, M., Rinnenthal, J., Roessler, V., Schrenk, A., Spina, M., Steurer, S., Trainor, N., Traxler, E., Wieshofer, C., Zoephel, A., & Ettmayer, P.
Affiliations
  • Boehringer Ingelheim (Austria) (AT)
  • University of Dundee (GB)
  • Boehringer Ingelheim RCV GmbH & Co KG, 1221 Vienna, Austria
Corresponding author
Ettmayer, Peter
Venue
Journal of Medicinal Chemistry
Published
2019-02-09
Volume
62
Issue
5
Pages
2508-2520
ISSN
  • 0022-2623 (ISSN-L)
  • 1520-4804
OpenAlex
W2913179893
Cited by
138
References
49
Citations by year
2026: 8 · 2025: 14 · 2024: 17 · 2023: 15 · 2022: 25 · 2021: 31 · 2020: 22 · 2019: 6
FWCI
7.03
Type
journal article
Language
en
Open access
Locations
  • Journal of Medicinal Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (publishedVersion, other-oa)
  • DORA PSI (Paul Scherrer Institute) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
Keywords
focal adhesion kinase, PROTACs, cereblon ligands, hepatocellular carcinoma, protein degradation, antiproliferative activity
MeSH terms
Humans, Ligands, Recombinant Proteins, RNA Interference, Cell Line, Tumor, Protein Kinase Inhibitors, Cell Proliferation, Focal Adhesion Protein-Tyrosine Kinases, Focal Adhesion Kinase 1, Proteolysis

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