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Journal Article

Analysis of synthetic monodisperse polysaccharides by wide mass range ultrahigh-resolution MALDI mass spectrometry

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Joseph,  Abragam A. S.
Peter H. Seeberger - Automated Systems, Biomolekulare Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Pardo-Vargas,  Alonso
Peter H. Seeberger - Automated Systems, Biomolekulare Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Nicolardi, S., Joseph, A. A. S., Zhu, Q., Shen, Z., Pardo-Vargas, A., Chiodo, F., et al. (2021). Analysis of synthetic monodisperse polysaccharides by wide mass range ultrahigh-resolution MALDI mass spectrometry. Analytical Chemistry. doi:10.1021/acs.analchem.1c00239.


Cite as: https://hdl.handle.net/21.11116/0000-0008-1E22-1
Abstract
Carbohydrates, such as oligo- and polysaccharides, are highly abundant biopolymers that are involved in numerous processes. The study of their structure and functions is commonly based on a material that is isolated from complex natural sources. However, a more precise analysis requires pure compounds with well-defined structures that can be obtained from chemical or enzymatic syntheses. Novel synthetic strategies have increased the accessibility of larger monodisperse polysaccharides, posing a challenge to the analytical methods used for their molecular characterization. Here, we present wide mass range ultrahigh-resolution matrix-assisted laser desorption/ionization (MALDI) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS) as a powerful platform for the analysis of synthetic oligo- and polysaccharides. Synthetic carbohydrates 16-, 64-, 100-, and 151-mers were mass analyzed and characterized by MALDI in-source decay FT-ICR MS. Detection of fragment ions generated from glycosidic bond cleavage (or cross-ring cleavage) provided information of the monosaccharide content and the linkage type, allowing for the corroboration of the carbohydrate compositions and structures.