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Chemical Genetics Reveals a Role of dCTP Pyrophosphatase 1 in Wnt Signaling
Author(s) -
Friese Alexandra,
Kapoor Shobhna,
Schneidewind Tabea,
Vidadala Srinivasa Rao,
Sardana Juhi,
Brause Alexandra,
Förster Tim,
Bischoff Matthias,
Wagner Jessica,
Janning Petra,
Ziegler Slava,
Waldmann Herbert
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201905977
Subject(s) - wnt signaling pathway , signal transduction , biology , microbiology and biotechnology , carcinogenesis , cell , biochemistry , chemistry , gene
Abstract 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.