Sensitive and fast characterization of site-specific protein glycosylation with capillary electrophoresis coupled to mass spectrometry.

ABSTRACT: Glycoproteomic analysis requires efficient separation and sensitive detection to enable the comprehensive characterization of glycan heterogeneity. Here, we report the use of capillary zone electrophoresis-electrospray ionization-mass spectrometry (CZE-ESI-MS) with an electrokinetically-pumped nanospray interface for the study of protein glycosylation microheterogeneity. A fast separation was developed that resolved intact glycopeptides generated from standard proteins within ~9min. Differentially terminal-galactosylated and sialylated species with the same glycosylation sites were well resolved. The concentration detection limits for CZE were three times higher than for nanoLC methods; however, a 200-fold smaller injection volume was used in CZE, which reflects the use of an extremely eff

SUBMITTER: Qu Y 

PROVIDER: S-EPMC5763510 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature