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- W2912678697 abstract "SUMMARY Endophilins-A are conserved endocytic adaptors with membrane curvature-sensing and - inducing properties. We show here that, independently of their role in endocytosis, endophilin-A1 and endophilin-A2 regulate exocytosis of neurosecretory vesicles. The number of neurosecretory vesicles was not altered in chromaffin cells without endophilin, yet fast capacitance and amperometry measurements revealed reduced exocytosis, smaller vesicle pools and changed fusion kinetics. Both endophilin-A1 (brain-enriched) and A2 (ubiquitous) rescued exocytic defects, but endophilin-A2 was more efficient. Distribution of neurosecretory vesicles was altered in the plasma membrane proximity, but levels and distributions of main exocytic and endocytic factors were unchanged, and slow compensatory endocytosis was not robustly affected. Endophilin’s role in exocytosis is mediated through its SH3-domain and, at least in part, interaction with intersectin, a coordinator of exocytic and endocytic traffic. Altogether, we report that endophilins-A, key endocytic proteins linked to neurodegeneration, directly regulate exocytosis by controlling vesicle recruitment, priming and fusion. Abstract Figure Recruitment, priming and fusion of secretory vesicles is controlled by endophilin Lack of endophilins alters the distribution of secretory vesicles near the PM Endophilin’s role in exocytosis is mediated through its SH3-domain Endophilin regulates intersectin localization by keeping it away from the PM" @default.
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- W2912678697 date "2019-02-05" @default.
- W2912678697 modified "2023-09-27" @default.
- W2912678697 title "Endophilin-A controls recruitment, priming and fusion of neurosecretory vesicles" @default.
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- W2912678697 doi "https://doi.org/10.1101/540864" @default.
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