USP7小分子抑制剂干扰了无素的结合
Lorna Kategaya1,2, Paola Di Lello3, Lionel Rougé3
1Department of Discovery Oncology, Genentech, South San Francisco, California 94080, USA.
Nature
|October 19, 2017
概括
研究人员开发了选择性泛素特异性蛋白酶-7 (USP7) 抑制剂GNE-6640和GNE-6776,这些抑制剂将USP7从其催化位点远离. 通过诱导细胞死亡和增强药物细胞毒性,这些抑制剂在癌症治疗中具有前景.
科学领域:
- 生物化学
- 分子生物学
- 药物发现
背景情况:
- 无素系统对于细胞过程至关重要,如无素特异蛋白酶-7 (USP7) 调节蛋白质的稳定性.
- 通过控制p53等瘤抑制剂的稳定性,USP7在癌症中发挥作用,但选择性抑制剂很难开发.
研究的目的:
- 开发新的选择性USP7抑制剂.
- 阐明抑制机制并探索这些抑制剂的治疗应用.
主要方法:
- 使用基于核磁共振 (NMR) 的查和基于结构的药物设计来识别和优化USP7抑制剂.
- 用同晶体结构来理解抑制剂与USP7的非共价结合.
- 用同位素标记进行了二基因链测定,以研究USP7基质偏好.
主要成果:
- 开发了两个选择性USP7抑制剂,即GNE-6640和GNE-6776.
- 这些化合物与催化半氨酸不同的地方与USP7结合,从而减弱了泛氨酸的结合.
- 抑制剂增强化疗剂和PIM激酶抑制剂的细胞毒性,诱导瘤细胞死亡.
- USP7优先结合和分裂与Lys48结合的泛素链,这种机制通过二-泛素链分析得到阐明.
结论:
- GNE-6640和GNE-6776代表了一类新的USP7抑制剂,其向于全方位结,为癌症治疗提供了有前途的策略.
- 这些发现表明向蛋白质- 乌比基相互作用的应用范围更广泛,用于开发针对其他杜比基酶和相关蛋白质的抑制剂.
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