title: A family of potassium channel genes related to eag in Drosophila and mammals.
abstract: We have identified a conserved family of genes related to Drosophila eag, which encodes a distinct type of voltage-activated K+ channel. Three related genes were recovered in screens of cDNA libraries from Drosophila, mouse, and human tissues. One gene is the mouse counterpart of eag; the other two represent additional subfamilies. The human gene maps to chromosome 7. Family members share at least 47% amino acid identity in their hydrophobic cores and all contain a segment homologous to a cyclic nucleotide-binding domain. Sequence comparisons indicate that members of this family are most closely related to vertebrate cyclic nucleotide-gated cation channels and plant inward-rectifying K+ channels. The existence of another family of K+ channel structural genes further extends the known diversity of K+ channels and has important implications for the structure, function, and evolution of the superfamily of voltage-sensitive ion channels.
authors.affiliation: Laboratory of Genetics, University of Wisconsin, Madison 53706.
authors.forename: J W
authors.initials: JW
authors.lastname: Warmke
authors.forename: B
authors.initials: B
authors.lastname: Ganetzky
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D002897:Chromosomes, Human, Pair 7; D017931:DNA Primers / Q000737:chemistry; D018076:DNA, Complementary / Q000235:genetics; D029721:Drosophila Proteins; D004331:Drosophila melanogaster / Q000235:genetics; D051638:Ether-A-Go-Go Potassium Channels; D005796:Genes; D006801:Humans; D015640:Ion Channel Gating; D051379:Mice; D008969:Molecular Sequence Data; D005810:Multigene Family; D010802:Phylogeny; D015221:Potassium Channels / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D029721:Drosophila Proteins; D051638:Ether-A-Go-Go Potassium Channels; C496884:KCNH1 protein, human; C496885:Kcnh1 protein, mouse; D015221:Potassium Channels; C496883:eag protein, Drosophila