
The molecular organization of presynaptic active zones during calcium influx–triggered neurotransmitter release is the focus of intense investigation. The Drosophila coiled-coil domain protein Bruchpilot (BRP) was observed in donut-shaped structures centered at active zones of neuromuscular synapses by using subdiffraction resolution STED (stimulated emission depletion) fluorescence microscopy. At brp mutant active zones, electron-dense projections (T-bars) were entirely lost, Ca 2+ channels were reduced in density, evoked vesicle release was depressed, and short-term plasticity was altered. BRP-like proteins seem to establish proximity between Ca 2+ channels and vesicles to allow efficient transmitter release and patterned synaptic plasticity.
Male, ddc:610, Models, Neurological, Presynaptic Terminals, Action Potentials, Nerve Tissue Proteins, Larva, Mutation, Synapses, Animals, Drosophila Proteins, Drosophila, Female, Calcium Channels, Synaptic Vesicles
Male, ddc:610, Models, Neurological, Presynaptic Terminals, Action Potentials, Nerve Tissue Proteins, Larva, Mutation, Synapses, Animals, Drosophila Proteins, Drosophila, Female, Calcium Channels, Synaptic Vesicles
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