通过光亲和标记进行小分子相互作用映射,揭示了NSAIDs的结合点热点
Jinxu Gao1, Adelphe Mfuh1, Yuka Amako1
1Department of Chemistry and Chemical Biology , Harvard University , 12 Oxford St. , Cambridge , Massachusetts 02138 , United States.
Journal of the American Chemical Society
|March 16, 2018
概括
研究人员开发了一种新的方法,即通过光亲和标记 (SIM-PAL) 绘制小分子相互作用图. 这项技术确定了1000多种与非类固醇抗炎药物 (NSAID) 相互作用的蛋白质,揭示了直接结合部位和潜在的新疗法机制.
科学领域:
- 化学生物学
- 蛋白质组学
- 药理学
背景情况:
- 单一药物影响多个点的多药性对于非类固醇抗炎药 (NSAIDs) 等治疗药物来说是常见的.
- 对细胞内的小分子绘制完整的分子相互作用 (相互作用体) 是一个挑战.
- 了解这些相互作用对于阐明药物机制和发现新的治疗应用至关重要.
研究的目的:
- 开发和应用一个新的平台,通过光亲和标记 (SIM-PAL) 绘制小分子相互作用图,用于直接,小分子结合部位的细胞内特征.
- 在整个细胞中识别NSAID的直接蛋白相互作用体和结合部位.
- 探索NSAID在已知点之外的更广泛的蛋白质相互作用.
主要方法:
- 开发SIM-PAL,一个涉及NSAID衍生物与蛋白质组的光化学结合的平台.
- 用于敏感检测的结合的丰富和同位素重编.
- 基于质谱的NSAID蛋白直接结合点的定位.
主要成果:
- 鉴定了一种包含1000多种显著丰富蛋白质的NSAID相互作用体.
- 直接描述近200个结合,从细胞表面到细胞核的NSAID结合部位.
- 在H2A和H2B基因组上发现光NSAID的特定结合点,并通过NSAID结合稳定COX-2和基因组H2A.
- 已知 (例如NF-κB) 和新 (例如AP-2,蛋白酶体) 蛋白质复合物相互作用的识别.
结论:
- SIM-PAL是一个有效的平台,用于绘制小分子互动体,并在细胞环境中表征直接结合点.
- 无抗炎药物具有超出其标准目标范围的广泛蛋白质相互作用,并可能通过这些更广泛的相互作用影响生物过程.
- SIM-PAL平台可用于绘制各种小分子的全球结合点,为药物发现和机制研究提供了强大的工具.
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