SNARE function analyzed in synaptobrevin/VAMP knockout mice

S. Schoch, F. Deák, A. Königstorfer, M. Mozhayeva, Y. Sara, T. C. Südhof, E. T. Kavalali

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453 Scopus citations

Abstract

SNAREs (soluble NSF-attachment protein receptors) are generally acknowledged as central components of membrane fusion reactions, but their precise function has remained enigmatic. Competing hypotheses suggest roles for SNAREs in mediating the specificity of fusion, catalyzing fusion, or actually executing fusion. We generated knockout mice lacking synaptobrevin/VAMP 2, the vesicular SNARE protein responsible for synaptic vesicle fusion in forebrain synapses, to make use of the exquisite temporal resolution of electrophysiology in measuring fusion. In the absence of synaptobrevin 2, spontaneous synaptic vesicle fusion and fusion induced by hypertonic sucrose were decreased @O 10- fold, but fast Ca2+-triggered fusion was decreased more than 100-fold. Thus, synaptobrevin 2 may function in catalyzing fusion reactions and stabilizing fusion intermediates but is not absolutely required for synaptic fusion.

Original languageEnglish (US)
Pages (from-to)1117-1122
Number of pages6
JournalScience
Volume294
Issue number5544
DOIs
StatePublished - Nov 2 2001

ASJC Scopus subject areas

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    Schoch, S., Deák, F., Königstorfer, A., Mozhayeva, M., Sara, Y., Südhof, T. C., & Kavalali, E. T. (2001). SNARE function analyzed in synaptobrevin/VAMP knockout mice. Science, 294(5544), 1117-1122. https://doi.org/10.1126/science.1064335