Structural Basis of Inhibition of ER alpha-Coactivator Interaction by High-Affinity N-Terminus Isoaspartic Acid Tethered Helical PeptidesXie, M., Zhao, H., Liu, Q., Zhu, Y., Yin, F., Liang, Y., Jiang, Y., Wang, D., Hu, K., Qin, X., Wang, Z., Wu, Y., Xu, N., Ye, X., Wang, T., Li, Z.
(2017) J. Med. Chem. 60: 8731-8740
- PubMed: 29045135
- DOI: 10.1021/acs.jmedchem.7b00732
- Primary Citation of Related Structures:
- PubMed Abstract:
Direct inhibition of the protein-protein interaction of ERα and its endogenous coactivators with a cell permeable stabilized peptide may offer a novel, promising strategy for combating ERα positive breast cancers. Here, we report the co-crystal struc ...
Direct inhibition of the protein-protein interaction of ERα and its endogenous coactivators with a cell permeable stabilized peptide may offer a novel, promising strategy for combating ERα positive breast cancers. Here, we report the co-crystal structure of a helical peptide stabilized by a N-terminal unnatural cross-linked aspartic acid (TD) in complex with the ERα ligand binding domain (LBD). We designed a series of peptides and peptide 6 that showed direct and high-affinity binding to ERα with selective antiproliferative activity in ERα positive breast cancer cells. The co-crystal structure of the TD-stabilized peptide 6 in complex with ERα LBD further demonstrates that it forms an α helical conformation and directly binds at the coactivator binding site of ERα. Further studies showed that peptide 6 W could potently inhibit cellular ERα's transcriptional activity. This approach demonstrates the potential of TD stabilized peptides to modulate various intracellular protein-protein interactions involved in a range of disorders.
Department of Gynecology, Shenzhen People's Hospital , Shenzhen 518020, China.,Key Lab in Healthy Science and Technology, Division of Life Science, Shenzhen Graduate School of Tsinghua University , Shenzhen 518055, China.,School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University , Shenzhen 518055, China.,Shenzhen Key Lab of Tissue Engineering, The Second People's Hospital of Shenzhen , Shenzhen 518035, China.,Department of Biology, Southern University of Science and Technology , Shenzhen 518055, China.,Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center , Guangzhou 510060, Guangdong, China.,Shenzhen Middle School , Shenzhen 518001, China.