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  Functional and molecular distinction between recombinant rat GABAA receptor subtypes by Zn2+

Draguhn, A., Verdoorn, T. A., Ewert, M., Seeburg, P. H., & Sakmann, B. (1990). Functional and molecular distinction between recombinant rat GABAA receptor subtypes by Zn2+. Neuron, 5(6), 781-788. doi:10.1016/0896-6273(90)90337-F.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0019-AD34-3 Version Permalink: https://hdl.handle.net/21.11116/0000-0000-7FC3-6
Genre: Journal Article

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 Creators:
Draguhn, Andreas1, Author           
Verdoorn, Todd A., Author
Ewert, Markus2, Author           
Seeburg, Peter H.2, Author           
Sakmann, Bert1, Author           
Affiliations:
1Department of Cell Physiology, Max Planck Institute for Medical Research, Max Planck Society, ou_1497701              
2Department of Molecular Neurobiology, Max Planck Institute for Medical Research, Max Planck Society, ou_1497704              

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 Abstract: gamma-Aminobutyric acid receptor (GABAAR) channels in different neurons display heterogeneous functional properties. Molecular cloning revealed a large number of GABAAR subunits that assemble into GABAAR subtypes with different functional properties, suggesting that the subunit combination determines the functional properties of the receptor. In this study, the subunit composition of GABAARs is related to a functional distinction between Zn2(+)-sensitive and Zn2(+)-insensitive receptor subtypes. GABAARs reconstituted in transiently transfected fibroblasts from combinations of cDNAs encoding alpha and beta subunits are potently blocked by Zn2+. The presence of a gamma subunit in any combination with the other subunits leads to the formation of GABAARs that are almost insensitive to Zn2+. These data provide a structural correlate to the functional heterogeneity of the action of Zn2+ on GABAARs in native membranes and show that Zn2+ insensitivity of GABA-activated currents indicates the presence of a gamma-subunit in the assembled GABAAR channel.

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Language(s): eng - English
 Dates: 1990-09-051990-10-101990-12
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0896-6273(90)90337-F
URI: https://www.ncbi.nlm.nih.gov/pubmed/1702644
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Title: Neuron
Source Genre: Journal
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Publ. Info: Cambridge, Mass. : Cell Press
Pages: - Volume / Issue: 5 (6) Sequence Number: - Start / End Page: 781 - 788 Identifier: ISSN: 0896-6273
CoNE: https://pure.mpg.de/cone/journals/resource/954925560565