Abstract
Molecular characterization of myelin is a prerequisite for understanding the normal structure of the axon/myelin-unit in the healthy nervous system and abnormalities in myelin-related disorders. However, reliable molecular profiles necessitate very pure myelin membranes, in particular when considering the power of highly sensitive “omics”-data acquisition methods. Here, we recapitulate the history and recent applications of myelin purification. We then provide our laboratory protocols for the biochemical isolation of a highly pure myelin-enriched fraction from mouse brains and for its proteomic analysis. We also supply methodological modifications when investigating posttranslational modifications, RNA, or myelin from peripheral nerves. Notably, technical advancements in solubilizing myelin are beneficial for gel-based and gel-free myelin proteome analyses. We conclude this article by exemplifying the exceptional power of label-free proteomics in the mass-spectrometric quantification of myelin proteins.
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We thank K.-A. Nave for discussions and financial support made possible by an European Research Council (ERC) Advanced Grant.
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Erwig, M.S. et al. (2019). Myelin: Methods for Purification and Proteome Analysis. In: Lyons, D., Kegel, L. (eds) Oligodendrocytes. Methods in Molecular Biology, vol 1936. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-9072-6_3
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