Angewandte Chemie - International Edition p. 13009 - 13013 (2019)
Update date:2022-08-11
Topics:
Friese, Alexandra
Kapoor, Shobhna
Schneidewind, Tabea
Vidadala, Srinivasa Rao
Sardana, Juhi
Brause, Alexandra
F?rster, Tim
Bischoff, Matthias
Wagner, Jessica
Janning, Petra
Ziegler, Slava
Waldmann, Herbert
Cell-based screening is a powerful approach to identify novel chemical modulators and biological components of relevant biological processes. The canonical Wnt pathway is essential for normal embryonic development and tissue homeostasis, and its deregulation plays a crucial role in carcinogenesis. Therefore, the identification of new pathway members and regulators is of significant interest. By means of a cell-based assay monitoring Wnt signaling we identified the pyrrolocoumarin Pyrcoumin as inhibitor of canonical Wnt signaling. Target identification and validation revealed that Pyrcoumin is a competitive inhibitor of dCTP pyrophosphatase 1 (dCTPP1). We demonstrate a yet unknown interaction of dCTPP1 with ubiquitin carboxyl-terminal hydrolase (USP7) that is counteracted by dCTPP1 inhibitors. These findings indicate that dCTPP1 plays a role in regulation of Wnt/β-catenin signaling most likely through a direct interaction with USP7.
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