E3结合酶适配器的目标是C端的循环胺降解
Saki Ichikawa1, Hope A Flaxman1, Wenqing Xu1
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
Nature
|October 19, 2022
概括
C终端循环 imides 是由大脑 (CRBN) 识别的新发现的生理降解物. 这一发现揭示了蛋白质降解的自然机制,
科学领域:
- 生物化学
- 分子生物学
- 蛋白质组学
背景情况:
- Cereblon (CRBN) 是thalidomide和lenalidomide的关键E3连接基质适配剂.
- 这些药物用于血液恶性瘤和向蛋白质降解策略.
- 通过CRBN的thalidomide-binding域识别的精确结构图案仍然难以捉摸.
研究的目的:
- 通过cereblon (CRBN) 结合域识别的自然降解基因.
- 研究C端循环胺作为CRBN生理基质的作用.
主要方法:
- 研究的翻译后修饰,特别是由谷氨酸或阿斯巴拉金形成的C端循环胺.
- 合成含有C端循环胺基基因的二,并将其纳入双功能化学降解剂中.
- 在实验室和细胞模型中评估了CRBN依赖的无化和蛋白质降解.
主要成果:
- 已确定C端循环胺为CRBN的生理降解物.
- 证明这些循环化物可以替代化学降解剂中的thalidomide.
- 显示将这种降解物添加到蛋白质C末端驱动了CRBN介导的无所不在和降解.
- 证实C端循环胺自发形成,并被内源CRBN识别.
结论:
- 这种C端循环胺代表了新发现的大脑细胞的生理降解 (CRBN).
- 这一发现阐明了由CRBN降解蛋白质的自然调节机制.
- 这一发现对了解CRBN的生理作用和优化涉及向蛋白质降解的治疗策略有意义.
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