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Plasma membrane-derived extracellular microvesicles mediate non-canonical intercellular NOTCH signaling
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Plasma membrane-derived extracellular microvesicles mediate non-canonical intercellular NOTCH signaling
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Journal Article
Plasma membrane-derived extracellular microvesicles mediate non-canonical intercellular NOTCH signaling
2017
Overview
ARMMs (arrestin domain-containing protein 1 (ARRDC1)-mediated microvesicles) are extracellular vesicles that bud directly at the plasma membrane; however, little is known about the molecular composition and physiological function of these vesicles. Here we report that ARMMs contain active NOTCH receptors and mediate a non-canonical intercellular NOTCH signaling. We identify over 100 proteins that are significantly enriched in ARMMs, including ARRDC1, TSG101 and multiple ESCRT complex proteins. About a third of ARMMs-enriched proteins are plasma membrane proteins, including the NOTCH2 receptor. The incorporation of NOTCH2 into ARMMs is facilitated by the ITCH E3 ligase and the metalloprotease ADAM10, both of which are also secreted into ARMMs. NOTCH2 in ARMMs can be delivered into recipient cells, and upon activation by γ-secretase cleavage, induces NOTCH-specific gene expression. Together, our findings reveal a role for ARMMs in a novel NOTCH signaling pathway that acts in distance and is independent of direct cell–cell contact.
ARMMs are extracellular vesicles that bud directly at the plasma membrane; their function is poorly understood. Here the authors purify and carryout a proteomics analysis of the protein components of ARMMs, and show that NOTCH receptors are recruited into ARMMs and can be transferred to recipient cells to mediate NOTCH signaling.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ Amyloid Precursor Protein Secretases - metabolism
/ Arrestin
/ Cell Membrane - ultrastructure
/ Extracellular Vesicles - physiology
/ Humanities and Social Sciences
/ Humans
/ Membrane Proteins - metabolism
/ Proteins
/ Receptor, Notch2 - metabolism
/ Receptors, Notch - physiology
/ Science
/ Ubiquitin-Protein Ligases - metabolism
/ Vesicles
