The study of the N-terminome and the precise identification of proteolytic processing events are key in biology. Dedicated methodologies have been developed as the comprehensive characterization of the N-terminome can hardly be achieved by standard proteomics methods. In this context, we have set up a trimethoxyphenyl phosphonium (TMPP) labeling approach that allows the characterization of both N-terminal and internal digestion peptides in a single experiment. This latter point is a major advantage of our strategy as most N-terminomics methods rely on the enrichment of N-terminal peptides and thus exclude internal peptides. We have implemented a double heavy/light TMPP labeling and an automated data validation workflow that make our doublet N-terminal oriented proteomics (dN-TOP) strategy efficient for high-throughput N-terminome analysis.
CITATION STYLE
Westermann, B., Vaca Jacome, A. S., Rompais, M., Carapito, C., & Schaeffer-Reiss, C. (2017). Doublet N-terminal oriented proteomics for N-terminomics and proteolytic processing identification. In Methods in Molecular Biology (Vol. 1574, pp. 77–90). Humana Press Inc. https://doi.org/10.1007/978-1-4939-6850-3_6
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