Post-translational add-ons mark the path in exosomal protein sorting.

Cellular and Molecular Life Sciences : CMLS
Olga Moreno-GonzaloFrancisco Sánchez-Madrid

Abstract

Extracellular vesicles (EVs) are released by cells to the extracellular environment to mediate inter-cellular communication. Proteins, lipids, nucleic acids and metabolites shuttled in these vesicles modulate specific functions in recipient cells. The enrichment of selected sets of proteins in EVs compared with global cellular levels suggests the existence of specific sorting mechanisms to specify EV loading. Diverse post-translational modifications (PTMs) of proteins participate in the loading of specific elements into EVs. In this review, we offer a perspective on PTMs found in EVs and discuss the specific role of some PTMs, specifically Ubiquitin and Ubiquitin-like modifiers, in exosomal sorting of protein components. The understanding of these mechanisms will provide new strategies for biomedical applications. Examples include the presence of defined PTM marks on EVs as novel biomarkers for the diagnosis and prognosis of certain diseases, or the specific import of immunogenic components into EVs for vaccine generation.

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Methods Mentioned

BETA
Ubiquitination
deubiquitination
nuclear translocation
acetylations
myristoylation
glycosylation
acetylation
biopsies

Software Mentioned

ESCRT

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