Visualization of synaptic specializations in live C. elegans with synaptic vesicle protein-GFP fusions

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Abstract

Synaptic specializations are difficult to visualize at the light microscope level in living preparations. To circumvent this problem, synaptic vesicle proteins were fused to green fluorescent protein (GFP) and expressed in C. elegans neurons. C. elegans synaptobrevin-GFP and synaptogyrin-GFP fusion proteins were observed to target to synaptic sites. This localization allowed the visualization of synaptic specializations in living animals with light microscopy. Restricted expression of synaptobrevin-GFP fusions in subsets of neurons enables the visualization of individual presynaptic varicosities. The cell biology underlying the sorting of synaptic vesicle proteins, trafficking of vesicles to terminals, and the development of presynaptic specializations is now more amenable to forward genetic analysis using these synaptic markers. Copyright (C) 1999 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalJournal of Neuroscience Methods
Volume89
Issue number1
DOIs
StatePublished - Jul 1 1999

Keywords

  • AP180
  • Fluorescence microscopy
  • Green fluorescent protein
  • In vivo imaging
  • Synapse
  • Synaptic vesicle
  • Synaptobrevin
  • Synaptogyrin

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