Identification of PDE6D as a potential target of sorafenib via PROTAC technology
Li, Y.; Meng, Q.; Wang, P.; Liu, X.; Fu, Q.; Xie, Y.; Zhou, Y.; Qi, X.; Huang, N.
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The identification of unknown target of a multi-kinase inhibitor sorafenib is important to better understand the mechanism of action of this drug in anti-cancer and anti-fibrotic treatments. Here, we report the combination of PROTAC technique with quantitative proteomic analysis to identify the unknown cellular targets of sorafenib. Sorafenib-based PROTAC can strongly degrade a non-kinase target PDE{delta} in different types of cells. We also confirmed the direct binding interaction of PDE{delta} with sorafenib by CETSA and SPR assays. Together, our research suggests that PDE{delta} is a new potential target of sorafenib, and PROTAC technology may be a promising approach for cellular target identification of bioactive compounds of interest.
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