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- W2180854259 abstract "It is currently unknown whether the molecular steps of large dense-core vesicle (LDCV) docking and priming are identical to the corresponding reactions in synaptic vesicle (SV) exocytosis. Munc13s are essential for SV docking and priming, and we systematically analyzed their role in LDCV exocytosis using chromaffin cells lacking individual isoforms. We show that particularly Munc13-2 plays a fundamental role in LDCV exocytosis, but in contrast to synapses lacking Munc13s, the corresponding chromaffin cells do not exhibit a vesicle docking defect. We further demonstrate that ubMunc13-2 and Munc13-1 confer Ca(2+)-dependent LDCV priming with similar affinities, but distinct kinetics. Using a mathematical model, we identify an early LDCV priming step that is strongly dependent upon Munc13s. Our data demonstrate that the molecular steps of SV and LDCV priming are very similar while SV and LDCV docking mechanisms are distinct." @default.
- W2180854259 created "2016-06-24" @default.
- W2180854259 creator A5018228978 @default.
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- W2180854259 creator A5068243350 @default.
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- W2180854259 date "2015-11-17" @default.
- W2180854259 modified "2023-10-01" @default.
- W2180854259 title "Identification of a Munc13-sensitive step in chromaffin cell large dense-core vesicle exocytosis" @default.
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