8ARR

Small molecular stabilizer for ERalpha and 14-3-3 (1076394)

8ARR の概要

• エントリーDOI: 10.2210/pdb8arr/pdb
• 分子名称: 14-3-3 protein sigma, Estrogen receptor, MAGNESIUM ION, ... (5 entities in total)
• 機能のキーワード: 14-3-3, eralpha, stabilization, covalent, structural protein
• 由来する生物種: Homo sapiens (human); 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 27646.52

構造登録者

Visser, E.J.,Vandenboorn, E.M.F.,Ottmann, C. (登録日: 2022-08-17, 公開日: 2023-09-20, 最終更新日: 2024-11-06)

主引用文献

Konstantinidou, M.,Visser, E.J.,Vandenboorn, E.,Chen, S.,Jaishankar, P.,Overmans, M.,Dutta, S.,Neitz, R.J.,Renslo, A.R.,Ottmann, C.,Brunsveld, L.,Arkin, M.R.
Structure-Based Optimization of Covalent, Small-Molecule Stabilizers of the 14-3-3 sigma /ER alpha Protein-Protein Interaction from Nonselective Fragments.
J.Am.Chem.Soc., 145:20328-20343, 2023

PubMed Abstract: The stabilization of protein-protein interactions (PPIs) has emerged as a promising strategy in chemical biology and drug discovery. The identification of suitable starting points for stabilizing native PPIs and their subsequent elaboration into selective and potent molecular glues lacks structure-guided optimization strategies. We have previously identified a disulfide fragment that stabilized the hub protein 14-3-3σ bound to several of its clients, including ERα and C-RAF. Here, we show the structure-based optimization of the nonselective fragment toward selective and highly potent small-molecule stabilizers of the 14-3-3σ/ERα complex. The more elaborated molecular glues, for example, show no stabilization of 14-3-3σ/C-RAF up to 150 μM compound. Orthogonal biophysical assays, including mass spectrometry and fluorescence anisotropy, were used to establish structure-activity relationships. The binding modes of 37 compounds were elucidated with X-ray crystallography, which further assisted the concomitant structure-guided optimization. By targeting specific amino acids in the 14-3-3σ/ERα interface and locking the conformation with a spirocycle, the optimized covalent stabilizer achieved potency, cooperativity, and selectivity similar to the natural product Fusicoccin-A. This case study showcases the value of addressing the structure, kinetics, and cooperativity for molecular glue development.

PubMed: 37676236
DOI: 10.1021/jacs.3c05161

実験手法

X-RAY DIFFRACTION (1.35 Å)