Exocytosis of post-Golgi vesicles is regulated by components of the endocytic machinery.
Exocytosis of post-Golgi vesicles is regulated by components of the endocytic machinery.
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DOI:
10.1016/j.cell.2009.04.064
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发表时间:
2009-06-26
期刊:
影响因子:
64.5
通讯作者:
Simon SM
中科院分区:
文献类型:
--
作者:
Jaiswal JK;Rivera VM;Simon SM
Post-Golgi vesicles target and deliver most biosynthetic cargoes to the cell surface. However, the molecules and mechanism involved in fusion of these vesicles is not well understood in mammalian cells. We have employed a system to simultaneously monitor release of luminal and membrane biosynthetic cargoes from individual post-Golgi vesicles. Exocytosis of these vesicles is not calcium-triggered and can result in complete, partial or no release of membrane cargo. Partial or no release of membrane cargo of a fusing vesicle are fates associated with kiss-and-run exocytosis and are the predominant mode of post-Golgi vesicle exocytosis. Partial cargo release by post-Golgi vesicles occurs due to premature closure of the fusion pore and is modulated by the activity of clathrin, actin and dynamin. Our results demonstrate that the components of the endocytic machinery modulate the nature and extent of secretion of biosynthetic cargo by affecting fusion of post-Golgi vesicles to the cell membrane.
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