Gangliosides, as plasma membrane-associated sialylated glycolipids, are antigenic structures and they serve as ligands for adhesion proteins of pathogens, for toxins of bacteria, and for endogenous proteins of the host. The detectability by carbohydrate-binding proteins of glycan antigens and ligands on glycolipids can be influenced by the differing lipid moieties. To investigate glycan sequences of gangliosides as recognition structures, we have underway a program of work to develop a "gangliome" microarray consisting of isolated natural gangliosides and neoglycolipids (NGLs) derived from glycans released from them, and each linked to the same lipid molecule for arraying and comparative microarray binding analyses. Here, in the first phase of our studies, we describe a strategy for high-sensitivity assignment of the tetrasaccharide backbones and application to identification of eight of monosialylated glycans released from bovine brain gangliosides. This approach is based on negative-ion electrospray mass spectrometry with collision-induced dissociation (ESI-CID-MS/MS) of the desialylated glycans. Using this strategy, we have the data on backbone regions of four minor components among the monosialo-ganglioside-derived glycans; these are of the ganglio-, lacto-, and neolacto-series. Graphical abstract.
Assignment by Negative-Ion Electrospray Tandem Mass Spectrometry of the Tetrasaccharide Backbones of Monosialylated Glycans Released from Bovine Brain Gangliosides / W. Chai, Y. Zhang, L. Mauri, M.G. Ciampa, B. Mulloy, S. Sonnino, T. Feizi. - In: JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY. - ISSN 1044-0305. - 29:6(2018 Jun), pp. 1308-1318.
|Titolo:||Assignment by Negative-Ion Electrospray Tandem Mass Spectrometry of the Tetrasaccharide Backbones of Monosialylated Glycans Released from Bovine Brain Gangliosides|
MAURI, LAURA [Methodology]
CIAMPA, MARIA GRAZIA [Methodology]
SONNINO, SANDRO (Penultimo) [Conceptualization]
|Parole Chiave:||Backbone structures; Bovine brain; Gangliosides; Glycans; Negative-ion ESI-CID-MA/MS; Oligosaccharides; Sequence assignment|
|Settore Scientifico Disciplinare:||Settore BIO/10 - Biochimica|
|Data di pubblicazione:||giu-2018|
|Data ahead of print / Data di stampa:||11-mag-2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1007/s13361-018-1944-8|
|Appare nelle tipologie:||01 - Articolo su periodico|
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