E-cadherin, a transmembrane protein involved in epithelial cell-cell adhesion and signaling, is found in exosomal fractions isolated from human body fluids. A cellular mechanism for recruitment of E-cadherin into extracellular vesicles (EVs) has not yet been defined. Here, we show that E-cadherin is incorporated into the membrane of EVs with the extracellular domain exposed at the vesicle surface. This recruitment depends on the endosomal sorting complex required for transport I (ESCRT-I) component Tsg101 and a highly conserved tetrapeptide P(S/T)AP late domain motif in the cytoplasmic tail of E-cadherin that mediates interaction with Tsg101. Mutation of this motif results in a loss of interaction and a dramatic decrease in exosomal E-cadherin secretion. We conclude, that the process of late domain mediated exosomal recruitment is exerted by this endogenous non-ESCRT transmembrane protein.
CITATION STYLE
Bänfer, S., Kutscher, S., Fleck, F., Dienst, M., Preußer, C., Pogge von Strandmann, E., & Jacob, R. (2022). Late domain dependent E-cadherin recruitment into extracellular vesicles. Frontiers in Cell and Developmental Biology, 10. https://doi.org/10.3389/fcell.2022.878620
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