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Glutamate Release.

John T Hackett1, Tetsufumi Ueda2,3,4

  • 1Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, 22908-0736, USA.

Neurochemical Research
|May 28, 2015
PubMed
Summary
This summary is machine-generated.

Glutamate, the primary excitatory neurotransmitter, is released from synaptic vesicles. This review details the biochemical and neurophysiological processes, including vesicle filling, docking, and fusion, crucial for neurotransmission.

Keywords:
Aspartate aminotransferaseExcitatory synapseGlycolytic ATPLocal synthesisSNARESynapsin ISynatotagminVGLUT

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Cell Biology

Background:

  • Glutamate is the principal excitatory neurotransmitter in the central nervous system.
  • Synaptic vesicles are the primary storage and release sites for glutamate.
  • Understanding glutamate release mechanisms is crucial for neuroscience research.

Purpose of the Study:

  • To review the biochemical and neurophysiological processes of glutamate release.
  • To consolidate evidence supporting vesicular release of glutamate.
  • To elucidate the molecular machinery involved in synaptic vesicle exocytosis.

Main Methods:

  • Literature review of biochemical and neurophysiological studies on glutamate release.
  • Analysis of evidence for vesicular accumulation and release of glutamate.
  • Examination of molecular mechanisms including protein phosphorylation, vesicle docking, and fusion.

Main Results:

  • Glutamate is actively accumulated into synaptic vesicles.
  • Synaptic vesicles are primed for release through mechanisms like Synapsin I phosphorylation.
  • Vesicle docking and fusion involve the SNARE complex and Ca(2+)-dependent regulation by synaptotagmin.

Conclusions:

  • Synaptic vesicles play a central role in the storage and release of glutamate.
  • A multi-step process involving vesicle filling, priming, docking, and fusion mediates glutamate exocytosis.
  • Key molecular players like CaM kinase II, SNAREs, and synaptotagmin are critical for regulated glutamate release.