Cited by 1,213Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismAldose Reductase and Taurine

Two genes encode distinct glutamate decarboxylases

Erlander, Mark G., Tillakaratne, Niranjala J.K., Feldblum, Sophie, Patel, Neela, Tobin, Allan J.·1991·Neuron

Abstract

gamma-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 cofactor 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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Crossref · 10.1016/0896-6273(91)90077-d

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  • In the cell-type-specific networks, the authors found well-known transcription factors associated with brain development, including NEUROG1, DLGAP2, and MEF2A for excitatory neurons and GAD1, GAD2, and LHX6 for inhibitory neurons.

    “In these, we found a number of well-known TFs associated with brain development—e.g., NEUROG1, DLGAP2, and MEF2A for excitatory neurons and GAD1, GAD2, and LHX6 for inhibitory neurons (Fig. 5G) (43–46).”
  • GRIK4 displays complex chromatin interactions with multiple Glu peaks, and GAD1 is engaged in GABA peaks via chromatin interactions.

    “GRIK4, a gene that encodes an ionotropic class of glutamate receptor36, displayed complex chromatin interactions with multiple Glu peaks. In contrast, GAD1, a gene that encodes a well-known cellular marker for inhibitory neurons37, was engaged in GABA peaks via chromatin interactions (Supplementary Fig. 8c).”

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Authors
Erlander, M. G., Tillakaratne, N. J. K., Feldblum, S., Patel, N., & Tobin, A. J.
Affiliations
University of California, Los Angeles (US)
Venue
Neuron
Publisher
Elsevier BV
Published
1991-07
Volume
7
Issue
1
Pages
91-100
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2092246706
Cited by
1,213
References
64
Citations by year
2026: 13 · 2025: 23 · 2024: 24 · 2023: 26 · 2022: 11 · 2021: 61 · 2020: 26 · 2019: 30 · 2018: 21 · 2017: 26 · 2016: 36 · 2015: 36 · 2014: 36 · 2013: 28 · 2012: 35
FWCI
19.17
Type
journal article
Language
en
Open access
closed
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Neurological Disorders and Stroke
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Aldose Reductase and Taurine
Keywords
glutamic acid decarboxylase, GAD65, GAD67, GABA, GABA synthesis, pyridoxal phosphate cofactor, type 1 diabetes, autoimmunity, inhibitory neurotransmitter
MeSH terms
Amino Acid Sequence, Animals, Antigens, Bacteria, Brain, Genes, Glutamate Decarboxylase, Molecular Sequence Data, Pyridoxal Phosphate, RNA, Messenger, Subcellular Fractions, Rats

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