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• W2081556594 abstract "Arginine methylation is a common posttranslational modification with reported functions in transcription, RNA processing and translation, and DNA repair. Trypanosomes encode five protein arginine methyltransferases, suggesting that arginine methylation exerts widespread impacts on the biology of these organisms. Here, we performed a global proteomic analysis of Trypanosoma brucei to identify arginine methylated proteins and their sites of modification. Using an approach entailing two-dimensional chromatographic separation and alternating electron transfer dissociation and collision induced dissociation, we identified 1332 methylarginines in 676 proteins. The resulting data set represents the largest compilation of arginine methylated proteins in any organism to date. Functional classification revealed numerous arginine methylated proteins involved in flagellar function, RNA metabolism, DNA replication and repair, and intracellular protein trafficking. Thus, arginine methylation has the potential to impact aspects of T. brucei gene expression, cell biology, and pathogenesis. Interestingly, pathways with known methylated proteins in higher eukaryotes were identified in this study, but often different components of the pathway were methylated in trypanosomes. Methylarginines were often identified in glycine rich contexts, although exceptions to this rule were detected. Collectively, these data inform on a multitude of aspects of trypanosome biology and serve as a guide for the identification of homologous arginine methylated proteins in higher eukaryotes.T. brucei is a protozoan parasite that causes lethal African sleeping sickness in humans and nagana in livestock, thereby imposing a significant medical and economic burden on sub-Saharan Africa. The parasite encounters very different environments as it cycles between mammalian and insect hosts, and must exert cellular responses to these varying milieus. One mechanism by which all cells respond to changing environments is through posttranslational modification of proteins. Arginine methylation is one such modification that can dramatically impact protein-protein and protein-nucleic acid interactions and subcellular localization of proteins. To define the breadth of arginine methylation in trypanosomes and identify target proteins, we performed a global proteomic analysis of arginine methylated proteins in insect stage T. brucei. We identified 1332 methylarginines in 676 proteins, generating the largest compilation of methylarginine containing proteins in any organism to date. Numerous arginine methylated proteins function in RNA and DNA related processes, suggesting this modification can impact T. brucei genome integrity and gene regulation at numerous points. Other processes that appear to be strongly influenced by arginine methylation are intracellular protein trafficking, signaling, protein folding and degradation, and flagellar function. The widespread nature of arginine methylation in trypanosomes highlights its potential to greatly affect parasite biology and pathogenesis." @default.
• W2081556594 created "2016-06-24" @default.
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• W2081556594 date "2013-10-01" @default.
• W2081556594 modified "2023-09-25" @default.
• W2081556594 title "Global proteomic analysis in trypanosomes reveals unique proteins and conserved cellular processes impacted by arginine methylation" @default.
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• W2081556594 doi "https://doi.org/10.1016/j.jprot.2013.07.010" @default.
• W2081556594 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3935770" @default.
• W2081556594 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23872088" @default.
• W2081556594 hasPublicationYear "2013" @default.
• W2081556594 type Work @default.

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