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.
Organizational Affiliation:
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.
Download Mendeley
Download Endnote
