Abstract
In microbial cells surface-exposed proteins represent a physiologically important class of molecules as they enable these cells to interact with their environment both as free-living organisms and during interactions with a host. However, the characteristics of these proteins are quite divergent, which makes attempts to enrich, analyze, and quantify these molecules a challenging task. In this chapter two complementary methods for the enrichment and identification of cell surface-associated proteins, namely the biotinylation and the shaving approaches, are presented. Both protocols have been optimized for Gram-positive bacteria, and we provide a step-by-step guide for sample generation. Possible pitfalls during protein preparation are discussed.
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Acknowledgments
This work was supported by grants from the Deutsche Forschungsgemeinschaft (SFB TRR 34 and GRK 1870) and Top Institute Pharma projects T4-213 and T4-502.
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Bonn, F., Maaß, S., van Dijl, J.M. (2018). Enrichment of Cell Surface-Associated Proteins in Gram-Positive Bacteria by Biotinylation or Trypsin Shaving for Mass Spectrometry Analysis. In: Becher, D. (eds) Microbial Proteomics. Methods in Molecular Biology, vol 1841. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-8695-8_4
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DOI: https://doi.org/10.1007/978-1-4939-8695-8_4
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