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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lambert, J. J. Reyes, A. Chen, R. Lan, N. C. Belelli, D. Peters, J. A. |
| Description | Author Affiliation: Chen R ( CoCensys, Inc., Irvine, CA 92718.); |
| Abstract | A cDNA encoding a functional gamma-aminobutyric (GABA)-activated Cl- channel has been isolated from an adult Drosophila head cDNA library. When expressed in Xenopus laevis oocytes, the subunit functions efficiently, presumably as a homooligomeric complex and is activated by GABA or muscimol. GABA-evoked currents are highly sensitive to antagonism by picrotoxin but are insensitive to bicuculline, RU 5135, or zinc. Pentobarbitone greatly enhances GABA-evoked currents, whereas the neurosteroid 5 alpha-pregnan-3 alpha-ol-20-one demonstrates a large reduction in both the potency and maximal effect when compared with its actions upon vertebrate GABA type A receptors. Although zinc-insensitive, the subunit is also insensitive to flunitrazepam. Hence, the GABA receptors formed by this subunit exhibit a unique pharmacology when compared with vertebrate GABA type A receptors or those composed of rho subunits. Because the receptor-channel complex functions as a homooligomer, this subunit may be of value in mutagenesis studies aiming to define drug-binding sites. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 13 |
| Volume Number | 91 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1994-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Bicyclo Compounds, Heterocyclic Drosophila Melanogaster Metabolism Receptors, GABA-A Physiology Receptors, GABA Gamma-Aminobutyric Acid Pharmacology Amino Acid Sequence Animals Bicuculline Bicyclo Compounds Cloning, Molecular Convulsants DNA Primers DNA, Complementary Genetics Flunitrazepam Gene Expression Macromolecular Substances Molecular Sequence Data Muscimol Oocytes Drug Effects Pentobarbital Picrotoxin Polymerase Chain Reaction Biosynthesis Transcription, Genetic Xenopus Laevis Comparative Study Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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