Abstract
N-Linked protein glycosylation is conserved throughout the three domains of life and influences protein function, stability, and protein complex formation. N-Linked glycosylation is an essential process in Eukaryotes; however, although N-glycosylation affects multiple cellular processes in Archaea and Bacteria, it is not needed for cell survival. Methods for the analyses of N-glycosylation in eukaryotes are well established, but comparable techniques for the analyses of the pathways in Bacteria and Archaea are needed. In this chapter we describe new methods for the detection and analyses of N-linked, and the recently discovered free oligosaccharides (fOS), from whole cell lysates of Campylobacter jejuni using non-specific pronase E digestion and permethylation followed by mass spectrometry. We also describe the expression and immunodetection of the model N-glycoprotein, AcrA, fused to a hexa-histidine tag to follow protein glycosylation in C. jejuni. This chapter concludes with the recent demonstration that high-resolution magic angle spinning NMR of intact bacterial cells provides a rapid, non-invasive method for analyzing fOS in C. jejuni in vivo. This combination of techniques provides a powerful tool for the exploration, quantification, and structural analyses of N-linked and free oligosaccharides in the bacterial system.
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Acknowledgments
We would like to dedicate this chapter to our fantastic mentors and colleagues at the National Research Council – Institute for Biological Sciences who are always pushing forward the boundaries in glycomics. In particular, for these studies, we thank Jean-Robert Brisson, Harold Jarrell and Jianjun Li. This work was funded by the NRC Genomics and Health Initiative.
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Nothaft, H., Liu, X., McNally, D.J., Szymanski, C.M. (2010). N-Linked Protein Glycosylation in a Bacterial System. In: Li, J. (eds) Functional Glycomics. Methods in Molecular Biology, vol 600. Humana Press. https://doi.org/10.1007/978-1-60761-454-8_16
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