通过使用DNA编码库发现活细胞上的膜蛋白
Yiran Huang1, Rui Hou1,2, Fong Sang Lam1
1Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China.
Journal of the American Chemical Society
|August 22, 2024
概括
研究人员开发了一种新方法, 通过活细胞上的DNA编码库 (DEL) 来发现激活膜蛋白的药物分子. 这种方法成功地发现了EGFR,TPOR和INSR等关键受体的新兴激素.
科学领域:
- 化学生物学
- 分子生物学
- 药物发现
背景情况:
- 在化学生物学中,识别膜蛋白的生物活性联体至关重要.
- 发现小分子激动剂的现有方法通常面临着直接针对活细胞上的膜蛋白的挑战.
研究的目的:
- 在活细胞上使用DNA编码库 (DEL) 直接识别小分子激动剂的新方法.
- 使用三个关键膜蛋白质验证方法:表皮生长因子受体 (EGFR),血栓形成素受体 (TPOR) 和胰岛素受体 (INSR).
主要方法:
- 使用DNA编码库 (DEL) 对活细胞进行选择,将细胞外联结与细胞内生物化学转化连接起来.
- 使用大规模的DEL选 (高达10亿个化合物) 来针对选定的膜蛋白标.
- 鉴定了结合亲和力,细胞活性和下游信号通路激活的激动剂.
主要成果:
- 对EGFR,TPOR和INSR成功发现了具有亚纳米亲和力和低微分子细胞活性的新型激动剂.
- 已识别的胰岛素受体 (INSR) 激动剂,可能通过异质部位激活受体,与胰岛素产生协同作用,并激活下游途径.
- 已证明发现的INSR激动剂不会激活高度同类的胰岛素类生长因子1受体 (IGF- 1R),从而减轻潜在的瘤进展风险.
结论:
- 开发了一种用于细胞表面标的"功能性"DNA编码库选择方法,使得直接的激动剂识别成为可能.
- 提出的方法为发现对各种膜蛋白的激动剂提供了广泛适用的策略.
- 通过提供功能查和针对膜蛋白的药物发现的强大工具, 这项工作推动了化学生物学领域的发展.
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