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Indexed by:Journal Papers

Date of Publication:2020-03-01

Journal:ANALYTICAL AND BIOANALYTICAL CHEMISTRY

Included Journals:PubMed、EI、SCIE

Volume:412

Issue:7,SI

Page Number:1497-1508

ISSN No.:1618-2642

Key Words:Mesoporous poly-melamine-formaldehyde (mPMF); Glycopeptide enrichment; Mass spectrometry; Hydrophilic interaction liquid chromatography (HILIC); Sialylated glycopeptide

Abstract:Analysis of glycoprotein sialylation is challenging due to the relatively low abundance of sialylated glycopeptides (SGPs) in complex biosamples and low signals of SGPs in mass spectrometry. In this study, a mesoporous poly-melamine-formaldehyde (mPMF) polymer was prepared and utilized as the high-efficiency sorbent for SGPs. The mPMF polymer featured high surface area (755.4 m(2) g(-1)) and high density of amine and triazine functional groups. This polymer demonstrated high enrichment selectivity (resistant to 100 molar fold interference of BSA) and superior adsorption capacity (560 mg g(-1)) for SGPs. The high performance of mPMF toward SGPs ascribes to the unique physicochemical properties of mPMF and high density of accessible binding sites for glycopeptides. Further application of mPMF to HeLa S3 cell lysate resulted in 576 characterized glycopeptides with 218 unique glycosylation sites. This finding provides a new choice of promising extraction approach for characterization of protein glycosylation.
   Graphical abstract A mesoporous poly-melamine-formaldehyde (mPMF) polymer was prepared and utilized as the high-efficiency enrichment sorbent for sialylated glycopeptides (SGPs).