Methods for metabolic oligosaccharide engineering that incorporates derivatized alkyne-bearing sugar analogs as “tags” into cellular glycoconjugates are disclosed. Alkynyl derivatized Fuc and alkynyl derivatized ManNAc sugars are incorporated into cellular glycoconjugates. Chemical probes comprising an azide group and a visual or fluorogenic probe and used to label alkyne-derivatized sugar-tagged glycoconjugates are disclosed. Chemical probes bind covalently to the alkynyl group by Cu(I)-catalyzed [3+2] azide-alkyne cycloaddition and are visualized at the cell surface, intracellularly, or in a cellular extract. The labeled glycoconjugate is capable of detection by flow cytometry, SDS-PAGE, Western blot, ELISA, confocal microscopy, and mass spectrometry.
揭示了一种代表性的代谢性
寡糖工程方法,该方法将衍生的烷基
糖类类似物作为“标签”并加入到细胞糖联合物中。烷基化的Fuc和烷基化的ManNAc糖被纳入到细胞糖联合物中。揭示了一种
化学探针,包括一个偶氮基团和一个可视或荧光探针,并用于标记烷基化糖标记的糖联合物。
化学探针通过Cu(I)催化的[3+2]偶氮-烷基环加成与烷基基团共价结合,并在细胞表面、细胞内或细胞
提取物中可视化。标记的糖联合物能够通过流式细胞术、
SDS-PAGE、Western blot、ELI
SA、共聚焦显微镜和质谱检测进行检测。