Glycomic analysis using glycoprotein immobilization for glycan extraction

Shuang Yang, Yan Li, Punit Shah, Hui Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Glycosylation is one of the most common protein modifications and is involved in many functions of glycoproteins. Investigating aberrant protein glycosylation associated with diseases is useful in improving disease diagnostics. Due to the nontemplate nature of glycan biosynthesis, the glycans attached to glycoproteins are enormously complex; thus, a method for comprehensive analysis of glycans from biological or clinical samples is needed. Here, we describe a novel method for glycomic analysis using glycoprotein immobilization for glycan extraction (GIG). Proteins or peptides from complex samples were first immobilized on solid support, and other nonconjugated molecules were removed. Glycans were enzymatically or chemically modified on solid phase before releasing from glycoproteins/glycopeptides for mass spectrometry analysis. The method was applied to the glycomic analysis of both N- and O-glycans.

Original languageEnglish (US)
Pages (from-to)5555-5561
Number of pages7
JournalAnalytical Chemistry
Volume85
Issue number11
DOIs
StatePublished - Jun 4 2013

ASJC Scopus subject areas

  • Analytical Chemistry

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