Identification of a Drosophila G protein α subunit (dGqα-3) expressed in chemosensory cells and central neurons

Subha Talluri, Anand Bhatt, Dean P. Smith

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


We have identified another Drosophila GTP-binding protein (G protein) α subunit, dGqα-3. Transcripts encoding dGqα-3 are derived from alternative splicing of the dGqα locus previously shown to encode two visual-system-specific transcripts [Lee, Y.-J., Dobbs, M.B., Verardi, M.L. & Hyde, D.R. (1990) Neuron 5, 889-898]. Immunolocalization studies using dGqα-3 isoform-specific antibodies and LacZ fusion genes show that dGqα-3 is expressed in chemosensory cells of the olfactory and taste structures, including a subset of olfactory and gustatory neurons, and in cells of the central nervous system, including neurons in the lamina ganglionaris. These data are consistent with a variety of roles for dGqα-3, including mediating a subset of olfactory and gustatory responses in Drosophila, and supports the idea that some chemosensory responses use G protein-coupled receptors and the second messenger inositol 1,4,5-trisphosphate.

Original languageEnglish (US)
Pages (from-to)11475-11479
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number25
StatePublished - Dec 5 1995


  • GTP-binding protein
  • Olfaction
  • RNA
  • Signal transduction

ASJC Scopus subject areas

  • General


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