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- W2077201621 abstract "Recent analytical advancements allow for large-scale glycomics and glycan-biomarker research with N-glycans released from complex protein mixtures of e.g. plasma with a wide range of protein concentrations. Protein enrichment techniques to obtain samples with a better representation of low-abundance proteins are hardy applied. In this study, hexapeptide ligands previously described for enrichment of low-abundance proteins in proteomics are evaluated for glycan analysis. A repeatable on-bead glycan release strategy was developed, and glycans were analyzed using capillary sieving electrophoresis on a DNA analyzer. Binding of proteins to the hexapeptide library occurred via the protein backbone. At neutral pH no discrimination between protein glycoforms was observed. Interestingly, glycan profiles of plasma with and without hexapeptide library enrichment revealed very similar patterns, despite the vast changes in protein concentrations in the samples. The most significant differences in glycosylation profiles were ascribed to a reduction in immunoglobulin-derived glycans. These results suggest that specific and sensitive biomarkers will be hard to access on the full plasma level using protein enrichment in combination with glycan analysis. Instead, fractionation techniques or profiling strategies on the glycopeptide level after enrichment are proposed for in-depth glycoproteomics research." @default.
- W2077201621 created "2016-06-24" @default.
- W2077201621 creator A5039947825 @default.
- W2077201621 creator A5048027042 @default.
- W2077201621 creator A5065397150 @default.
- W2077201621 creator A5080379557 @default.
- W2077201621 date "2012-02-01" @default.
- W2077201621 modified "2023-09-27" @default.
- W2077201621 title "Hexapeptide library as a universal tool for sample preparation in protein glycosylation analysis" @default.
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- W2077201621 doi "https://doi.org/10.1016/j.jprot.2011.11.028" @default.
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