Qinhong Luo, Yaqi Wang, Zhanfeng Hou, Huiting Liang, Licheng Tu, Yun Xing, Chuan Wan, Jianbo Liu, Rui Wang, Lizhi Zhu, Wei Han, Jianlong Wu, Fei Lu, Feng Yin and Zigang Li
Chem. Commun., 2024
DOI: 10.1039/D3CC05127G
Covalent proteolysis-targeting chimeras (PROTACs) offer enhanced selectivity, prolonged action, and increased efficacy against challenging target proteins. The conventional approach relies on covalent ligands, but our study presents an innovative method employing an N-sulfonyl pyridone warhead to selectively target tyrosine (Tyr) residues. The von Hippel–Lindau (VHL) moiety is transferred from the warhead to the exposed Tyr, allowing us to design a STING degrader (DC50 0.53 μM, Dmax 56.65%). This approach showcases the potential of nucleophilic amino acid labeling probes, particularly for proteins lacking easily accessible cysteine residues, opening new possibilities for covalent PROTAC design and targeted protein degradation therapies.
