Yamada K, Hyodo S, Matsuno YK, Kinoshita M, Maruyama SZ, Osaka YS, Casal E, Lee YC, Kakehi K. Rapid and sensitive analysis of mucin-type glycans using an in-line flow glycan-releasing apparatus.
Anal Biochem 2007;
371:52-61. [PMID:
17632070 DOI:
10.1016/j.ab.2007.06.013]
[Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Revised: 06/11/2007] [Accepted: 06/12/2007] [Indexed: 12/12/2022]
Abstract
Rapid and sensitive analysis of glycans is essential for glycomics. We previously reported an apparatus, the AutoGlycoCutter (AGC), for rapid release of O-linked glycans under alkaline conditions and its application to rapid analysis of glycans in proteoglycans. We now report an application of the AGC to obtain mucin-type glycans with reducing end (i.e., hemiacetal group) within only 3 min. The released oligosaccharides could be labeled with fluorescent 2-aminobenzoic acid for analysis by normal-phase high-performance liquid chromatography (NP-HPLC) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). We could detect O-glycans from as low as 5 pmol of bovine caseino glycomacropeptide (CGMP) by the proposed procedures. The validity of the current method was shown by the analyses of the released O-glycans from some standard glycoproteins: bovine submaxillary mucin, bovine fetuin, porcine stomach mucin, and human colostrum immunoglobulin A. The advantage of the current method was also demonstrated in comparative analysis of mucin-type glycans in CGMP derived from three different animal species.
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