Heparin-like glycosaminoglycan/amine salt-bridge interactions: a new potential tool for HLGAGs analysis using mass spectrometry.

Baiyi Xue, Sandra Alves, Coraline Desbans, Marie Souchaud, Aziz Filali-Ansary, Patrick Soubayrol, Jean-Claude Tabet

Laboratoire de Chimie Structurale Organique et Biologique - UMR 7201, University of Paris VI, Batiment F, 7éme étage, boîte 45, 4 Place Jussieu, F75252 Paris Cedex 05, France.

Journal of mass spectrometry : JMS 2011 Jul

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Characterization of glycosaminoglycans poses a challenge for current analytical techniques, as they are highly acidic, polydisperse and heterogeneous compounds. The purpose of this study is the separation and analysis of a partially depolymerized heparin-like glycosaminoglycan by on-line ion-pairing reversed-phase high-performance liquid chromatography/electrospray mass spectrometry. The gas-phase behavior of two synthesized glycosaminoglycans has been investigated. Dibutylamine was found to be the best suited ion-pairing reagents for mass spectrometry analysis. The optimized ion-pairing conditions provide reproducible and easily interpretable electrospray mass spectra in both negative and positive ESI modes. The glycosaminoglycans are detected as a non-covalent complex with amines. In fact, the observed ionic species and their gas-phase dissociation under CID conditions revealed the presence of salt bridge interactions in the gas phase. Copyright © 2011 John Wiley & Sons, Ltd.

Citation

Baiyi Xue, Sandra Alves, Coraline Desbans, Marie Souchaud, Aziz Filali-Ansary, Patrick Soubayrol, Jean-Claude Tabet. Heparin-like glycosaminoglycan/amine salt-bridge interactions: a new potential tool for HLGAGs analysis using mass spectrometry. Journal of mass spectrometry : JMS. 2011 Jul;46(7):689-95