Cited by 61Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismBacterial Genetics and Biotechnology

gamma-Aminobutyric acid uptake by a bacterial system with neurotransmitter binding characteristics.

Open access
Guthrie, G D, Nicholson-Guthrie, C S·1989·Proceedings of the National Academy of Sciences

Abstract

gamma-Aminobutyric acid (GABA), an amino acid, has been found in every class of living organisms. In higher organisms, GABA is a neurotransmitter and binds with high affinity and specificity to GABA receptors on neurons in a sodium-independent reaction that is saturable. The role of GABA in organisms lacking nervous tissue is not known. This report describes, in a strain of Pseudomonas fluorescens, a GABA uptake system with binding characteristics like those of the GABA (type A) brain receptor. The binding was saturable and specific for GABA, was sodium-independent, was of high affinity (Km = 65 nM), and was inhibited competitively by muscimol, a potent GABA analogue. The bacterial GABA system included a homogeneous binding site, and no cooperative interaction was found between sites. To our knowledge, such a system for GABA, or other neurotransmitters, in a bacterium has not been reported.

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Crossref · 10.1073/pnas.86.19.7378

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13 of 13 references verified0 citation errors · 0 not checkable

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  • Bacteria express receptors capable of sensing extracellular GABA.

    “bacteria express receptors capable of sensing extracellular, GABA (Guthrie and Nicholson-Guthrie, 1989).”

    From The Microbiota-Gut-Brain Axis (2019) · cites this paper as Guthrie and Nicholson-Guthrie, 1989

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Authors
Guthrie, G. D., & Nicholson-Guthrie, C. S.
Affiliations
Indiana University School of Medicine (US)
Venue
Proceedings of the National Academy of Sciences
Published
1989-10
Volume
86
Issue
19
Pages
7378-7381
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2088304943
Cited by
61
References
13
Citations by year
2026: 3 · 2025: 4 · 2024: 3 · 2023: 2 · 2022: 7 · 2021: 3 · 2020: 3 · 2019: 6 · 2018: 3 · 2016: 3 · 2015: 1 · 2014: 2 · 2013: 1 · 2012: 4
FWCI
0.27
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (2s07rr005371-30)
  • National Center for Research Resources (5 S07 RR5371)
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 › Genetics › Bacterial Genetics and Biotechnology
Keywords
GABA, GABA uptake, Pseudomonas fluorescens, neurotransmitter binding, GABA receptors, muscimol, sodium-independent transport, saturable binding, competitive inhibition
MeSH terms
Binding, Competitive, gamma-Aminobutyric Acid, Kinetics, Muscimol, Pseudomonas fluorescens, Receptors, GABA-A

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