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Updated: Feb 14, 2026

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系统的囊素扫描识别了瘤性KRAS中可用药物的口袋
Laurens M van Tienen1, Shadwa Bayoumi2, Khaja Muneeruddin3
1The Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
Cell chemical biology
|February 12, 2026
概括
可访问口袋的氨酸映射 (CysMAP) 识别了蛋白质中的新药标. 这种方法在KRAS (G12D) 变体中发现了新的结合口袋,为具有挑战性的目标推进了治疗开发.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- 在缺乏传统活性位点的蛋白质中识别可用药的口袋是治疗开发中的一个主要挑战.
- 瘤性RAS突变物,如KRAS(G12D),由于其难以捉摸的性质,是很难的目标.
研究的目的:
- 开发和验证一种新的方法,即可访问口袋的氨酸映射 (CysMAP),用于识别蛋白质中的可用药物的口袋.
- 将CysMAP应用于KRAS (G12D) 变体,以发现新的结合部位和潜在的治疗策略.
主要方法:
- CysMAP使用系统的聚合氨酸 (Cys) 变体库,与多种共价化合物库进行选.
- 使用完整的液体染色体质谱法 (LC-MS) 进行了高通量查.
- 189种KRAS (G12D) 变异被选对47种共价化合物进行选,以量化可访问性和反应性.
主要成果:
- CysMAP在KRAS交换机II口袋周围发现了Cys-变体的以前未知的联体结合状态.
- 对D92C变体的结构分析揭示了一个新的结合口袋,可以容纳各种化学实体.
- 这项研究突出了KRAS蛋白区域在Switch-II和α3.3之间的形状可塑性.
结论:
- CysMAP是一种有效的方法,用于发现蛋白质中的可用药物的口袋,包括那些难以捉摸的目标.
- 这些发现为KRAS ((G12D) 蛋白质结构和药物开发的潜在结合部位提供了新的见解.
- 这种方法对推进抗癌RAS突变物和其他具有挑战性的标的药物发现具有重大前景.
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