酶选择性蛋白亲和选择量谱法 (EAS-MS) 的应用
Xiaoyun Wang1, Jianxian Sun1,2, Shabbir Ahmad2
1Department of Chemistry, University of Toronto, Toronto, ON, Canada.
bioRxiv : the preprint server for biology
|February 3, 2025
概括
我们开发了对抗选择性蛋白质亲和性选择质谱查 (EAS-MS),以寻找具有挑战性的蛋白质标的弱结合物. 这种方法确定了16个与12个人类蛋白质结合的16个结合物,其中7个显示出对抗选择性结合.
科学领域:
- 生物化学 生物化学
- 化学生物学 化学生物学
- 药物发现 药物发现 药物发现
背景情况:
- 对于具有挑战性的蛋白质标来说,识别选择性配体仍然是药物发现中的一个重大障碍.
- 弱结合剂和酶选择性是传统查方法中经常被忽视的关键因素.
研究的目的:
- 开发和验证一种酶选择蛋白亲和性选择质谱检测 (EAS-MS) 选方法.
- 检测弱结合物,并评估对不同的人类蛋白质的连接体选择性.
- 通过直角测定和结构表征来确认绑定事件.
主要方法:
- 使用控制蛋白的方法开发.
- 使用EAS-MS.对8,210种奇拉化合物的查与31种人类蛋白质进行了查.
- 坐标测定和X射线晶体学用于验证和机械学研究.
主要成果:
- 发现了16种结合剂,向12种人类蛋白质,包括"挑战性-至-连接物"的标.
- 鉴定了7种具有3-20μM之间的解离常数 (KDs) 的酶选择性结合剂.
- 四个标结合体复合物的结构阐明,解释了酶选择性结合的机制.
结论:
- EAS-MS是一种敏感且高通量的方法,用于识别弱和抗选择性结合剂.
- 这种方法使得新型和具有挑战性的蛋白质标的配体的表征成为可能.
- EAS-MS为推进药物发现和化学生物学研究提供了一个强大的工具.
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