设计的内细胞酶触发蛋白调解有针对性的降解.
Buwei Huang1,2,3, Mohamad Abedi1,2, Green Ahn4
1Department of Biochemistry, University of Washington, Seattle, WA, USA.
bioRxiv : the preprint server for biology
|October 2, 2023
概括
研究人员开发了针对蛋白质降解的新型内细胞酶触发结合蛋白 (EndoTags). 这些可遗传编码的EndoTags克服了现有方法的局限性,并为各种应用提供了治疗潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 细胞表面受体内细胞结核和溶酶体贩运是关键的生物过程.
- 现有的治疗策略,如LYTAC和KineTAC,利用修饰的配体进行向蛋白质降解,但面临着诸如配体竞争和制造复杂性等局限性.
- 对某些受体缺乏天然配体,阻碍了针对性降解疗法的开发.
研究的目的:
- 设计和开发基于蛋白质的通用内细胞酶触发结合蛋白 (EndoTags),克服当前向蛋白质降解方法的局限性.
- 为了证明EndoTags在调解 lysosomal贩运和目标蛋白质降解方面的有效性.
- 探索EndoTags在组织特定向和先进治疗应用方面的潜力.
主要方法:
- 开发了新的蛋白质设计策略,用于创建触发内细胞分裂的结合蛋白 (EndoTags).
- 为特定受体设计的EndoTags,包括IGF-2R,ASGPR,Sortilin和转移素.
- 化EndoTags对向可溶性或跨膜蛋白质的蛋白质,并评估了溶酶体的贩运和降解.
主要成果:
- 成功设计和验证了多个受体的EndoTags (IGF-2R,ASGPR,索尔蒂林,转移素).
- 证明了EndoTags与标结合蛋白诱导了溶酶体贩运和标蛋白的降解.
- 展示了由于不同受体分布的不同EndoTags的组织特异向潜力.
- 突出了EndoTags的模块化和遗传编码性,使AND门控制能够提高特异性和局部分泌.
结论:
- 基因编码的EndoTags提供了一个针对蛋白质降解的多功能和模块化平台,克服了现有的基于连接体的方法的局限性.
- EndoTags促进受体介导的内细胞分裂和溶酶体降解,为组织特异性疗法提供了潜力.
- EndoTags的可调性和设计灵活性对有针对性的降解,信号通路激活和在药物和核酸合物中增强细胞吸收具有重大前景.
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