Development of Stabilized Peptide-Based PROTACs against Estrogen Receptor αClick to copy article linkArticle link copied!
- Yanhong JiangYanhong JiangKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Yanhong Jiang
- Qiwen DengQiwen DengKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Qiwen Deng
- Hui Zhao
- Mingsheng XieMingsheng XieKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Mingsheng Xie
- Longjian ChenLongjian ChenKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Longjian Chen
- Feng YinFeng YinKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Feng Yin
- Xuan QinXuan QinKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Xuan Qin
- Weihao ZhengWeihao ZhengKey Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Weihao Zheng
- Yongjuan Zhao*Yongjuan Zhao*E-mail: [email protected]Key Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Yongjuan Zhao
- Zigang Li*Zigang Li*E-mail: [email protected]Key Lab of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, ChinaMore by Zigang Li
Abstract

Peptide modulators targeting protein–protein interactions (PPIs) exhibit greater potential than small-molecule drugs in several important aspects including facile modification and relative large contact surface area. Stabilized peptides constructed by variable chemistry methods exhibit improved peptide stability and cell permeability compared to that of the linears. Herein, we designed a stabilized peptide-based proteolysis-targeting chimera (PROTAC) targeting estrogen receptor α (ERα) by tethering an N-terminal aspartic acid cross-linked stabilized peptide ERα modulator (TD-PERM) with a pentapeptide that binds the Von Hippel–Lindau (VHL) E3 ubiquitin ligase complex. The resulting heterobifunctional peptide (TD-PROTAC) selectively recruits ERα to the VHL E3 ligase complex, leading to the degradation of ERα in a proteasome-dependent manner. Compared with the control peptides, TD-PROTAC shows significantly enhanced activities in reducing the transcription of the ERα-downstream genes and inhibiting the proliferation of ERα-positive breast cancer cells. In addition, in vivo experiments indicate that TD-PROTAC leads to tumor regression in the MCF-7 mouse xenograft model. This work is a successful attempt to construct PROTACs based on cell-permeable stabilized peptides, which significantly broadens the chemical space of PROTACs and stabilized peptides.
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