Genetic modification of potassium channels in Drosophila Shaker mutants

Lawrence Salkoff, Robert Wyman

Research output: Contribution to journalArticlepeer-review

131 Scopus citations

Abstract

Previous research in Drosophila has implied that a variety of mutations affect ion channels1-4. In one of these studies it was suggested that mutations mapping at the X-linked Shaker locus of D. melanogaster might cause defects in some type of potassium channel in larval motoneurones2. We show here, by voltage-clamp analysis, that mutations at the Shaker locus affect one of the two types of voltage-sensitive potassium channels present in the Drosophila dorsal longitudinal flight muscle (DLM). Initial voltage-clamp studies5,6 revealed that one set of channels carries a fast, transient outward current, similar to the molluscan A current7-9, that is altered by mutations at the Shaker locus. The other set of channels carries a slower activating current, similar to delayed rectification 10,11, that is not affected by the Shaker mutation.

Original languageEnglish
Pages (from-to)228-230
Number of pages3
JournalNature
Volume293
Issue number5829
DOIs
StatePublished - 1981

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