Munc18-1 mutations that strongly impair SNARE-complex binding support normal synaptic transmission
Munc18-1 mutations that strongly impair SNARE-complex binding support normal synaptic transmission
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DOI:
10.1038/emboj.2012.72
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发表时间:
2012-05-02
期刊:
影响因子:
11.4
通讯作者:
Verhage, Matthijs
中科院分区:
文献类型:
--
作者:
Meijer, Marieke;Burkhardt, Pawel;Verhage, Matthijs
Synaptic transmission depends critically on the Sec1p/Munc18 protein Munc18-1, but it is unclear whether Munc18-1 primarily operates as a integral part of the fusion machinery or has a more upstream role in fusion complex assembly. Here, we show that point mutations in Munc18-1 that interfere with binding to the free Syntaxin1a N-terminus and strongly impair binding to assembled SNARE complexes all support normal docking, priming and fusion of synaptic vesicles, and normal synaptic plasticity in munc18-1 null mutant neurons. These data support a prevailing role of Munc18-1 before/during SNARE-complex assembly, while its continued association to assembled SNARE complexes is dispensable for synaptic transmission. The EMBO Journal (2012) 31, 2156-2168. doi:10.1038/emboj.2012.72; Published online 23 March 2012