Absence of Junctional Glutamate Receptor Clusters in Drosophila Mutants Lacking Spontaneous Transmitter Release

Little is known about the functional significance of spontaneous miniature synaptic potentials, which are the result of vesicular exocytosis at nerve terminals. Here, by using Drosophila mutants with specific defects in presynaptic function, we found that glutamate receptors clustered normally at ne...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2001-07, Vol.293 (5529), p.514-517
Hauptverfasser: Saitoe, Minoru, Schwarz, Thomas L., Umbach, Joy A., Gundersen, Cameron B., Kidokoro, Yoshiaki
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container_issue 5529
container_start_page 514
container_title Science (American Association for the Advancement of Science)
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creator Saitoe, Minoru
Schwarz, Thomas L.
Umbach, Joy A.
Gundersen, Cameron B.
Kidokoro, Yoshiaki
description Little is known about the functional significance of spontaneous miniature synaptic potentials, which are the result of vesicular exocytosis at nerve terminals. Here, by using Drosophila mutants with specific defects in presynaptic function, we found that glutamate receptors clustered normally at neuromuscular junctions of mutants that retained spontaneous transmitter secretion but had lost the ability to release transmitter in response to action potentials. In contrast, receptor clustering was defective in mutants in which both spontaneous and evoked vesicle exocytosis were absent. Thus, spontaneous vesicle exocytosis appears to be tightly linked to the clustering of glutamate receptors during development.
doi_str_mv 10.1126/science.1061270
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subjects Action Potentials
Anatomy
Animals
Antibodies
Behavioral neuroscience
Biological and medical sciences
Cell physiology
Drosophila
Drosophila - embryology
Drosophila - genetics
Drosophila - physiology
Embryos
Exocytosis
Fundamental and applied biological sciences. Psychology
Glutamate
Glutamic Acid - pharmacology
Insects
Larvae
Membrane Proteins - genetics
Membrane Proteins - metabolism
Membranes
Molecular and cellular biology
Mutation
Nervous system
Neural receptors
Neuromuscular Junction - embryology
Neuromuscular Junction - metabolism
Neuromuscular Junction - physiology
Neurons
Neuroscience
Neurotransmission
Presynaptic Terminals - metabolism
Presynaptic Terminals - physiology
Qa-SNARE Proteins
R-SNARE Proteins
Receptor Aggregation
Receptors
Receptors, Glutamate - metabolism
Spider Venoms - pharmacology
Synaptic Membranes - metabolism
Synaptic Membranes - physiology
Synaptic Transmission
Synaptic Vesicles - metabolism
Synaptic Vesicles - physiology
Temperature
Tetrodotoxin - pharmacology
Transgenes
title Absence of Junctional Glutamate Receptor Clusters in Drosophila Mutants Lacking Spontaneous Transmitter Release
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