lysosome-targeting 基因组用于细胞外蛋白质的降解
Steven M Banik1, Kayvon Pedram1, Simon Wisnovsky1
1Department of Chemistry, Stanford University, Stanford, CA, USA.
Nature
|July 31, 2020
概括
科学家开发了LYTACs (lysosome-targeting chimaeras) 来降解细胞外和膜蛋白. 这种新平台针对以前无法治疗的蛋白质, 提供治疗癌症和自身免疫疾病的潜力.
科学领域:
- 生物化学和分子生物学
- 药物发现和开发
- 细胞生物学
背景情况:
- 目前针对蛋白质的疗法通常依赖于调节蛋白质活性,但许多治疗相关的蛋白质具有未知的或无法访问的配置.
- 像PROTACs这样的现有蛋白质降解策略仅限于具有可访问的细胞域的细胞内蛋白质.
- 在主要疾病中涉及的细胞外和膜蛋白在很大程度上仍然无法被当前的降解方法所准.
研究的目的:
- 建立针对细胞外和膜相关蛋白质的总体降解策略.
- 开发一种新型的蛋白质降解平台,适用于目前治疗策略无法实现的蛋白质.
- 确定细胞外载荷内部化过程中的细胞机械的关键组成部分.
主要方法:
- 开发含有细胞表面受体和目标蛋白外细胞域的溶酶向基因组 (LYTAC).
- 使用LYTAC进行CRISPR干扰查,以阐明CI-M6PR介导的货物内部化途径.
- 通过分解特定的细胞外和膜蛋白 (例如ApoE4,EGFR,PD-L1) 来证明LYTAC的有效性.
主要成果:
- 成功建立了LYTACs作为细胞外和膜蛋白的向性解体平台.
- 确定了外囊复合体作为CI-M6PR内化途径的关键,以前未被识别的组成部分.
- 证明了治疗相关蛋白质的降解,展示了该平台的广泛适用性.
结论:
- LYTACs提供了一种新的多功能策略,用于向以前无法获得的分泌和膜蛋白进行降解.
- 这个平台有很大的潜力推进生物化学研究和开发各种疾病的新疗法.
- 发现外囊复合体的作用扩大了我们对细胞蛋白贩运和内化机制的理解.
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