Abstract
Glycosaminoglycans (GAGs) are sulfated glycans of complex structure and multiple biological actions. They are composed of disaccharide repeating units of alternating uronic acid/galactose and hexosamine. Sulfation patterns are an additional structural variation of these polymers. Nuclear magnetic resonance (NMR) spectroscopy is one of the most powerful analytical techniques employed in structural analysis of GAGs. 1D and 2D NMR spectra, both homonuclear 1H and heteronuclear 1H-13C, are the commonest NMR methods used. This chapter describes the overall experimental methods and materials necessary for adequate preparation of GAG samples for NMR investigations aimed to unveil the main structural characteristics of these biomacromolecules. The NMR methods discussed here cover all three isotopes (1H, 13C, and 15N) that can be exploited in structural analysis of GAGs. These NMR methods are described from an overall standpoint, to be applied to any GAG family, extracted from either natural or synthetic sources and destined to either basic research or pharmaceutical applications.
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Acknowledgments
This publication was supported by funds from the startup package provided from the University of Mississippi and the American Association of Colleges of Pharmacy 2019 New Investigator Award, all nominated to V.H.P. We acknowledge the invitation of Dr. Kuberan Balagurunathan, editor of the “Glycosaminoglycans—Chemistry & Biology” for the kind invitation to contribute a chapter to the book. NMR spectra shown in the figures were recorded at the National Institute for Biological Standards and Control, UK or at the Francis Crick Institute through provision of access to the MRC Biomedical NMR Centre. The Francis Crick Institute receives its core funding from Cancer Research UK (FC001029), the UK Medical Research Council (FC001029), and the Wellcome Trust (FC001029). This work was supported, in part, by Wellcome Trust Grant WT108430.
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Pomin, V.H., Mulloy, B. (2022). Nuclear Magnetic Resonance Methods in Structural Characterization of Glycosaminoglycans. In: Balagurunathan, K., Nakato, H., Desai, U., Saijoh, Y. (eds) Glycosaminoglycans. Methods in Molecular Biology, vol 2303. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-1398-6_16
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