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The determination of high-affinity protein/inhibitor binding constants by electrospray ionization hydrogen/deuterium exchange mass spectrometry

机译:电喷雾电离氢/氘交换质谱法测定高亲和力蛋白/抑制剂的结合常数

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摘要

Recently, a hydrogen/deuterium exchange method termed SUPREX (Stability of Unpurified Proteins from Rates of hydrogen/deuterium EXchange), capable of measuring protein/ligand binding constants, which utilizes matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), has been reported. Unlike more conventional approaches, SUPREX is inherently capable of measuring K-d values of tight binding ligands. Here we present a SUPREX-based method, incorporating automation and electrospray ionization (ESI)-MS, to measure K-d values for very potent inhibitors of the kinase PKC theta. The use of ESI offers an alternative to MALDI, with the advantages of improved mass measurement precision for larger proteins, and amenability to automation. K-d values generated by this method are in good agreement with those generated by a molecular protein kinase assay. Copyright (c) 2006 John Wiley & Sons, Ltd.
机译:最近,一种氢/氘交换方法被称为SUPREX(来自氢/氘交换率的未纯化蛋白的稳定性),它能够利用基质辅助激光解吸/电离质谱(MALDI-MS)来测量蛋白质/配体结合常数,已经被报告了。与更常规的方法不同,SUPREX固有地能够测量紧密结合配体的K-d值。在这里,我们介绍了一种基于SUPREX的方法,结合了自动化和电喷雾电离(ESI)-MS,以测量激酶PKC theta的强效抑制剂的K-d值。 ESI的使用提供了MALDI的替代方法,其优点是提高了对较大蛋白质的质量测量精度,并且易于自动化。通过该方法产生的K-d值与通过分子蛋白激酶测定法产生的K-d值非常一致。版权所有(c)2006 John Wiley&Sons,Ltd.

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