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  Ether-a-go-go encodes a voltage-gated channel permeable to K+ and Ca2+ and modulated by cAMP

Bruggemann, A., Pardo, L. A., Stuhmer, W., & Pongs, O. (1993). Ether-a-go-go encodes a voltage-gated channel permeable to K+ and Ca2+ and modulated by cAMP. Nature, 365(6445), 445-8. doi:10.1038/365445a0.

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Bruggemann, A.1, Author
Pardo, L. A.1, Author
Stuhmer, W.1, Author
Pongs, O.1, Author
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1Max Planck Society, ou_persistent13              

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Free keywords: Animals Base Sequence Calcium/*metabolism Cloning, Molecular Cyclic AMP/*metabolism DNA Primers Drosophila melanogaster Electrophysiology Ion Channels/drug effects/*genetics Molecular Sequence Data Oocytes Permeability Potassium/*metabolism Xenopus
 Abstract: The Drosophila ether-a-go-go (eag) mutant is responsible for altered potassium currents in excitable tissue. These mutants exhibit spontaneous, repetitive firing of action potentials in the motor axons of larval neuromuscular junctions. The eag gene encodes a polypeptide that shares sequence similarities with several different ionic channel proteins, including voltage-gated potassium channels, an inward rectifier as well as cyclic-nucleotide-gated channels. These formal similarities in the derived primary sequences indicate that eag polypeptides might express a new type of ion channel. Here we report the expression by eag RNA in Xenopus oocytes of such a channel which incorporates properties of both voltage- and ligand-gated channels. The permeability of these eag channels to potassium and calcium is dependent on voltage and cyclic AMP. The ability to mediate potassium-outward and calcium-inward currents endows this channel with properties likely to be important in the modulation of synaptic efficiency in both central and peripheral nervous systems.

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 Dates: 1993-09-301993-09-30
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: Other: 7692301
DOI: 10.1038/365445a0
ISSN: 0028-0836 (Print) 0028-0836 (Linking)
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Title: Nature
Source Genre: Journal
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Pages: - Volume / Issue: 365 (6445) Sequence Number: - Start / End Page: 445 - 8 Identifier: -