Abstract
Our aim was to review the processes of glutamate release from both biochemical and neurophysiological points of view. A large body of evidence now indicates that glutamate is specifically accumulated into synaptic vesicles, which provides strong support for the concept that glutamate is released from synaptic vesicles and is the major excitatory neurotransmitter. Evidence suggests the notion that synaptic vesicles, in order to sustain the neurotransmitter pool of glutamate, are endowed with an efficient mechanism for vesicular filling of glutamate. Glutamate-loaded vesicles undergo removal of Synapsin I by CaM kinase II-mediated phosphorylation, transforming to the release-ready pool. Vesicle docking to and fusion with the presynaptic plasma membrane are thought to be mediated by the SNARE complex. The Ca2+-dependent step in exocytosis is proposed to be mediated by synaptotagmin.
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Abbreviations
- AAT:
-
Aspartate aminotransferase
- CNS:
-
Central nervous system
- CaM-PK:
-
Calmodulin-dependent protein kinase
- GABA:
-
γ-Aminobutyric acid
- mepp:
-
Miniature end-plate potential
- RIM:
-
Rab3 interacting molecule
- RIM-BP:
-
RIM-binding protein
- SNARE:
-
Soluble N-ethylmaleimide-sensitive factor attachment protein receptor
- TCA:
-
Tricarboxylic acid
- VGLUT:
-
Vesicular glutamate transporter
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Special Issue: In Honor of Dr. Gerald Dienel.
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Hackett, J.T., Ueda, T. Glutamate Release. Neurochem Res 40, 2443–2460 (2015). https://doi.org/10.1007/s11064-015-1622-1
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DOI: https://doi.org/10.1007/s11064-015-1622-1