Neuron
Volume 7, Issue 1, July 1991, Pages 91-100
Journal home page for Neuron

Article
Two genes encode distinct glutamate decarboxylases

https://doi.org/10.1016/0896-6273(91)90077-DGet rights and content

Abstract

γ-Aminobutyric acid (GABA) is the most widely distributed known inhibitory neurotransmitter in the vertebrate brain. GABA also serves regulatory and trophic roles in several other organs, including the pancreas. The brain contains two forms of the GABA synthetic enzyme glutamate decarboxylase (GAD), which differ in molecular size, amino acid sequence, antigenicity, cellular and subcellular location, and interaction with the GAD co-factor pyridoxal phosphate. These forms, GAD65 and GAD67, derive from two genes. The distinctive properties of the two GADS provide a substrate for understanding not only the multiple roles of GABA in the nervous system, but also the autoimmune response to GAD in insulin-dependent diabetes mellitus.

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    Present address: Department of Molecular Biology MB-10, Scripps Clinic and Research Foundation, 10666 North Torrey Pines Road, La Jolla, California 92037.

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