在E3连接器上发现未知绑定口袋导致FBW7度调节器的识别
Míriam Martínez-Cartró1,2, Álvaro Serrano-Morrás1,2, Andrea Bertran-Mostazo1,2
1Departament de Farmàcia i Tecnologia Farmacéutica, i Fisicoquímica. Facultat de Farmàcia i Ciències de l'Alimentació Universitat de Barcelona, Barcelona, 08028, Spain.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 20, 2025
概括
研究人员在E3结合酶上发现了可用药物的全囊,这对向蛋白质降解至关重要. 他们发现了针对FBW7的新型小分子, 增强了c-MYC和c-JUN蛋白的降解.
科学领域:
- 生物化学和分子生物学
- 药物发现和开发
- 化学生物学
背景情况:
- E3结合酶是泛素蛋白酶系统 (UPS) 的中央调节剂,使其成为治疗策略的关键目标.
- 向蛋白降解 (TPD) 使用E3链酶的连接体,但只有少数E3链酶具有已知的小分子调节器.
- 识别E3链酶上的新可结合位点对于扩展TPD应用至关重要.
研究的目的:
- 开发一种有效的方法来识别各种E3结合酶的可结合表面.
- 发现结合并调节E3链酶活性的新型小分子,特别针对异质口袋.
- 在TPD中证明E3酶调节剂的治疗潜力.
主要方法:
- 对22个结构上不同的E3链酶进行计算选,以确定潜在的异质结合口袋.
- 聚焦FBW7的小分子聚合和特征.
- 生物物理和结构分析 (例如,X射线晶体) 来确认结合相互作用.
- 基于细胞的功能测试,以评估小分子对蛋白质降解途径的影响 (例如c-MYC,c-JUN).
主要成果:
- 一个有效的方法确定了22种不同的E3结合酶的显著结合机会.
- 发现了FBW7中的第一个强效和可逆的小分子结合剂.
- 这些FBW7结合剂通过生物物理和结构研究得到证实.
- 功能性测试表明,一些调节剂增强了c-MYC和c-JUN的FBW7依赖性降解.
结论:
- 艾洛斯特基口袋代表了针对小分子的E3链酶的大量未开发资源.
- 在TPD领域中,发现的全FBW7调节器提供了一种新的作用机制.
- 这些分子可以作为开发新型PROTAC (蛋白质溶解向基因组) 和其他TPD疗法的潜在手柄.
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