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Curr Opin Cell Biol. 2010 Aug;22(4):496-505. doi: 10.1016/j.ceb.2010.05.001. Epub 2010 Jun 3.

Cell biology of Ca2+-triggered exocytosis.

Author information

1
Department of Molecular and Cellular Physiology, Stanford University, 1050 Arastradero Rd., Palo Alto, CA 94304-5543, USA. zpang@stanford.edu

Abstract

Ca(2+) triggers many forms of exocytosis in different types of eukaryotic cells, for example synaptic vesicle exocytosis in neurons, granule exocytosis in mast cells, and hormone exocytosis in endocrine cells. Work over the past two decades has shown that synaptotagmins function as the primary Ca(2+)-sensors for most of these forms of exocytosis, and that synaptotagmins act via Ca(2+)-dependent interactions with both the fusing phospholipid membranes and the membrane fusion machinery. However, some forms of Ca(2+)-induced exocytosis may utilize other, as yet unidentified Ca(2+)-sensors, for example, slow synaptic exocytosis mediating asynchronous neurotransmitter release. In the following overview, we will discuss the synaptotagmin-based mechanism of Ca(2+)-triggered exocytosis in neurons and neuroendocrine cells, and its potential extension to other types of Ca(2+)-stimulated exocytosis for which no synaptotagmin Ca(2+)-sensor has been identified.

PMID:
20561775
PMCID:
PMC2963628
DOI:
10.1016/j.ceb.2010.05.001
[Indexed for MEDLINE]
Free PMC Article

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