通过对DCAF1进行刻板选择和特定部位的电友性PROTAC进行向蛋白质降解
Yongfeng Tao1, David Remillard1, Ekaterina V Vinogradova1
1Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California 92307, United States.
Journal of the American Chemical Society
|September 28, 2022
概括
研究人员发现了针对DCAF1进行蛋白质降解的新型亚齐丁烯胺. 这种针对蛋白质降解的突破为化学探测和使用电友PROTAC的药物发现开辟了新的途径.
科学领域:
- 化学生物学
- 药物发现
- 蛋白质组学
背景情况:
- 使用异构功能化合物和分子合剂的向蛋白降解 (TPD) 是药物发现的一个有希望的策略.
- 已知少数E3链酶具有小分子链体,阻碍了TPD的全部潜力.
- 发现新型E3连接酶及其连接体对于推进基于TPD的疗法至关重要.
研究的目的:
- 识别E3连接酶的新连接体,以扩大针对蛋白质降解的工具包.
- 使用TPD策略开发新的化学探测器和潜在的药物候选物.
- 探索针对DCAF1的新型TPD药物的作用机制.
主要方法:
- 化学蛋白质组学被用来发现新型联体.
- 合成了阿兹提丁烯胺,并根据其反应性进行了鉴定.
- 使用DCAF1配体开发了向电蛋白质溶解的嵌合体 (PROTACs).
- 使用突变细胞系 (C1113A) 调查了连体结合的立体选择性和位点特异性.
主要成果:
- 鉴定出亚齐丁烯胺是DCAF1的立体选择性和位点特异性共价配体,与氨酸1113发生反应.
- 这些配体成功地发展为电友性PROTAC,诱导人体细胞的向蛋白质降解.
- 已证实降解过程是立体选择性的,并且依赖于DCAF1的C1113残留物.
- 机理学研究表明,通过电友性PROTACs有效降解蛋白质只需要DCAF1的低参与度.
结论:
- 对立体化学定义的电友化合物的化学蛋白质分析可以识别E3结合酶上的新型结合性位点.
- 对DCAF1发现的亚齐丁烯胺代表了针对蛋白质降解的新类联体.
- 这项工作扩大了利用电友PROTAC技术开发新型化学探测器和药物的可能性.
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