硫非尼尔亚齐里丁作为瘤转录因子MYC的立体选择性共价破坏稳定降解剂
Hannah T Rosen1,2,3,4, Kelvin Li1,4, Christian E Stieger1,2,3,4
1Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.
Angewandte Chemie (International ed. in English)
|September 26, 2025
概括
研究人员开发了一种新型的共价接体,通过利用其无序区域来向并降解致癌MYC蛋白. 这一突破为准以前"无法治疗"的癌症驱动因素 (如MYC) 提供了一种新的策略.
科学领域:
- 在瘤学瘤学.
- 化学生物学 化学生物学
- 分子生物学分子生物学
背景情况:
- MYC是驱动癌症的关键瘤转录因子.
- 直接针对MYC是具有挑战性的,因为它的结构混乱,使它成为一个挑战.
- 没有药物可以治疗.
- 针对小分子在非结构化蛋白质区域中的过渡口袋是一个持续的挑战.
研究的目的:
- 开发一种新型的共价联结体库,以准和降解MYC.
- 识别和描述可以破坏和降解MYC的小分子.
- 探索转录因子中内在无序区域的可用性.
主要方法:
- 开发一种立体化学配对的螺旋环氧二醇亚齐里丁共价库.
- 检查图书馆是否有MYC降解活动.
- 打击化合物的作用机制的表征,包括MYC/MAX参与和蛋白酶体依赖性降解.
- 在MYC残留物C203和D205.5的位点定向突变发生.
主要成果:
- 鉴定了一种共价连接体,KL2-236,与一个参与MYC的硫亚齐里丁弹头.
- KL2-236破坏MYC的稳定,抑制其转录活性,并通过向C203和D205残留物诱导蛋白酶体依赖性降解.
- KL2-236的立体同位素表现出差异性的活性,特定的同位素具有更强的活性.
- 优化导致KL4-219A,一种更强大,更有选择性和更耐用的MYC降解剂.
结论:
- MYC的内在无序区域可以被同位素独特的奇拉小分子所准.
- 这种方法导致MYC的不稳定和退化,提供了一种新的治疗策略.
- 这些发现揭示了MYC内部的一个新的可链接站点,并证实了转录因子中准无序区域的有效性.
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