Comprehensive Evaluation of Cleavable Bioorthogonal Probes for Site-Specific O-GlcNAc Proteomics.

ABSTRACT: O-linked β-N-acetylglucosamine (O-GlcNAc) modification (i.e., O-GlcNAcylation) on proteins is an essential modification in physiology and pathology. Although O-GlcNAcylation is functionally critical, its analysis has been challenging. Despite the existence of a number of methods developed in the past years, which one(s) might have the best performance is largely unclear. To that end, we conducted a rigorous comparison of several cleavable bioorthogonal biotin-alkyne probes which showed promise for sensitive O-GlcNAc proteomics. In brief, we developed chemoenzymatic labeling/click chemistry-based analytical workflows for O-GlcNAc proteomics by utilizing four cleavable bioorthogonal probes, including photocleavabe-biotin-alkyne (PC-biotin-alkyne), dialkoxydiphenylsilane-biotin-alkyne (DADPS-

SUBMITTER: Hou C 

PROVIDER: S-EPMC12506516 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature