Rapid Assessment of Pepsin Column Activity for Reliable HDX-MS Studies

Rapid Assessment of Pepsin Column Activity for Reliable HDX-MS Studies
复制标题

快速评估胃蛋白酶柱活性以进行可靠的 HDX-MS 研究

DOI:
10.1021/jasms.1c00080
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发表时间:
2021
影响因子:
3.2
通讯作者:
Guttman, Miklos
Guttman, Miklos
中科院分区:
化学3区
文献类型:
--
作者:
Vorauer, Clint;Wrigley, Michael S.;Rincon Pabon, Juan P.;Watson, Michael J.;Mundorff, Charlie C.;Weis, David D.;Guttman, Miklos

文献摘要

相似文献

氢/氘交换质谱 (HDX-MS) 是一种广泛使用的技术,用于探测蛋白质结构动力学、跟踪构象变化和绘制蛋白质-蛋白质相互作用图谱。大多数 HDX-MS 研究采用自下而上的方法,利用酸性活性蛋白酶胃蛋白酶来消化感兴趣的蛋白质,通常利用柱形式的固定化蛋白酶。蛋白水解裂解的程度将极大地影响数据质量,并成为 HDX-MS 研究中变异的主要来源。在这里,我们提出了一种简单的常用肽混合物,这些肽是胃蛋白酶的底物,可以作为胃蛋白酶柱活性的快速检查。基于肽的测定不需要系统修改,并提供即时读数以检查和基准不同 HDX-MS 平台上的胃蛋白酶活性。
Hydrogen/deuterium exchange with mass spectrometry (HDX-MS) is a widely used technique to probe protein structural dynamics, track conformational changes, and map protein–protein interactions. Most HDX-MS studies employ a bottom-up approach utilizing the acid active protease pepsin to digest the protein of interest, often utilizing immobilized protease in a column format. The extent of proteolytic cleavage will greatly influence data quality and presents a major source of variation in HDX-MS studies. Here, we present a simple cocktail of commonly available peptides that are substrates of pepsin and can serve as a rapid check of pepsin column activity. The peptide-based assay requires no system modifications and provides an immediate readout to check and benchmark pepsin activity across different HDX-MS platforms.