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Filter-Aided N-Glycan Separation (FANGS): A Convenient Sample Preparation Method for Mass Spectrometric N-Glycan Profiling

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JournalJournal of Proteome Research
DateE-pub ahead of print - 22 Jan 2014
DatePublished (current) - 2014
Issue number3
Volume13
Number of pages10
Pages (from-to)1167-1176
Early online date22/01/14
Original languageEnglish

Abstract

We have developed a simple method for the release and isolation of glycoprotein N-glycans from whole-cell lysates using less than a million cells, for subsequent implementation with mass spectrometric analysis. Cellular protein extracts prepared using SDS solubilization were sequentially treated in a membrane filter device to ultimately release glycans enzymatically using PNGase F in the volatile buffer ammonium bicarbonate. The released glycans are recovered in the filtrate following centrifugation and typically permethylated prior to mass spectrometric analysis. We call our method "filter-aided N-glycan separation" and have successfully applied it to investigate N-glycan profiles of wild-type and mutant Chinese hamster ovary cells. This method is readily multiplexed and, because of the small numbers of cells needed, is compatible with the analysis of replicate samples to assess the true nature of glycan variability in tissue culture samples. © 2014 American Chemical Society.

    Research areas

  • cultured mammalian cells, filter-aided sample preparation, MALDI-MS, N -glycans, permethylation, SDS solubilization

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