利用E3连接酶KEAP1进行向蛋白质降解
Jieli Wei1, Fanye Meng1, Kwang-Su Park1
1Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.
Journal of the American Chemical Society
|September 14, 2021
概括
这项研究引入了一种使用KEAP1 E3链酶进行向蛋白质降解的新型蛋白质分解向基因组 (PROTAC). 新的PROTAC,MS83,有效降解BRD4和BRD3蛋白质,提高耐用性和抗增殖活性.
科学领域:
- 生物化学
- 分子生物学
- 药物发现
背景情况:
- 蛋白质分解向化马体 (PROTACs) 是一种新兴的治疗策略.
- 针对蛋白质降解,PROTACs利用了全方位蛋白质酶系统 (UPS).
- 目前在PROTAC开发中使用有限的E3链酶.
研究的目的:
- 调查KEAP1 E3链酶在PROTAC中介蛋白质降解中的潜力.
- 使用KEAP1开发和描述一种针对BRD4/3/2的新型PROTAC (MS83).
- 与现有的PROTAC相比,评估MS83的疗效,耐用性和抗增殖活性.
主要方法:
- 通过将KEAP1连接到BRD4/3/2结合剂来设计和合成PROTAC (MS83).
- 基于细胞的测试以评估蛋白质降解,包括度,时间,KEAP1和UPS依赖性.
- 在降解动力学和抗增殖作用方面,MS83与CRBN招募的PROTAC (dBET1) 的比较.
- 对BRD4的异形特异性降解分析.
主要成果:
- 在依赖KEAP1和UPS的方式中,MS83有效降低了BRD4和BRD3蛋白水平.
- 与dBET1相比,MS83在MDA- MB-468细胞中显示出更持久的BRD4/3降解.
- 在MDA-MB-231细胞中观察到BRD4短异形与长异形的选择性降解.
- 与dBET1相比,MS83表现出更高的抗增殖活性.
结论:
- 可以成功利用KEAP1 E3链酶进行向蛋白质降解.
- MS83是一种强效和选择性的PROTAC,其性能比现有的药物更好.
- 这项工作扩大了PROTAC开发的E3酶库,提供了新的治疗可能性.
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