Tuning activity-based probe selectivity for serine proteases by on-resin ‘click’ construction of peptide diphenyl phosphonates
作者:Sevnur Serim、Susanne V. Mayer、Steven H. L. Verhelst
DOI:10.1039/c3ob40907d
日期:——
Activity-based probes (ABPs) are powerful tools for functional proteomics studies. Their selectivity can be influenced by modification of a recognition element that interacts with pockets near the active site. For serine proteases there are a limited number of simple and efficient synthetic procedures for the development of selective probes. Here we describe a new synthetic route combining solid and solution phase chemistries to generate a small library of diphenyl phosphonate probes. Building blocks carrying a P1 recognition element and an electrophilic phosphonate warhead were prepared in solution and âclickedâ on-resin onto a tripeptide. We show the ability to modulate the activity and selectivity of diphenyl phosphonate ABPs and demonstrate activity-dependent labeling of endogenous proteases within a tissue proteome. The herein described synthetic approach therefore serves as a valuable method for rapid diversification of serine protease ABPs.
基于活性的探针(ABPs)是功能蛋白质组学研究的强大工具。对与活性位点附近口袋相互作用的识别元件进行修饰可影响探针的选择性。对于丝氨酸蛋白酶来说,用于开发选择性探针的简单而高效的合成程序数量有限。在这里,我们介绍了一种结合固相和溶相化学的新合成路线,以生成一个小型的二苯基膦酸盐探针库。我们在溶液中制备了携带 P1 识别元件和亲电性膦酸盐弹头的构建模块,并通过树脂将其粘附到三肽上。我们展示了调节二苯基膦酸盐 ABPs 活性和选择性的能力,并展示了组织蛋白质组中内源性蛋白酶的活性依赖性标记。因此,本文所述的合成方法是快速实现丝氨酸蛋白酶 ABPs 多样化的重要方法。