The present invention provides photo-cleavable anionic surfactants, particularly 4-hexylphenylazosulfonate (Azo) and sodium 4-hexylphenylazosulfonate derivatives, which can be rapidly degraded upon UV irradiation, for top-down and bottom-up proteomics. These surfactants can effectively solubilize proteins and peptide fragments with performance comparable to sodium dodecyl sulfate (SDS) and are compatible with mass spectrometry analysis of the solubilized proteins and peptide fragments. Top-down proteomic studies using the present photo-cleavable anionic surfactants has allowed the detection of 100-fold more unique proteoforms as compared to controls and has enabled the solubilization of membrane proteins for comprehensive characterization of protein post-trans-modifications. In addition, the present photo-cleavable anionic surfactants are also suitable for dissolving polypeptides in bottom-up proteomic experiments including extracellular matrix proteomics, and are suitable as a substitute for SDS in gel electrophoresis.
本发明提供了光解离的阴离子表面活性剂,特别是4-
己基苯基偶氮
磺酸盐(Azo)和
钠4-
己基苯基偶氮
磺酸盐衍
生物,可以在紫外辐射下迅速降解,用于自顶向下和自底向上的蛋白质组学研究。这些表面活性剂可以有效溶解蛋白质和肽段,性能可与
十二烷基硫酸钠(
SDS)相媲美,并且与质谱分析兼容,可对溶解的蛋白质和肽段进行分析。利用本发明的光解离的阴离子表面活性剂进行自顶向下蛋白质组学研究,相比对照组,已实现了检测100倍更多独特的蛋白质形式,并实现了膜蛋白的溶解,以全面表征蛋白质后转录修饰。此外,本发明的光解离的阴离子表面活性剂还适用于溶解
多肽在自底向上的蛋白质组学实验中,包括细胞外基质蛋白质组学,并可作为凝胶电泳中
SDS的替代品。