Defective Proboscis Extension Response (DPR), a Member of the Ig Superfamily Required for the Gustatory Response to Salt

Makoto Nakamura, David Baldwin, Susannah Hannaford, John Palka, Craig Montell

Research output: Contribution to journalArticlepeer-review

Abstract

Gustatory stimuli, such as sugar, induce a behavioral response in Drosophila that involves extension of the proboscis and consumption of the sugar-containing solution. Addition of salt to the sugar solution inhibits this behavioral response. However, the mechanisms and gene products involved in the salt aversion response have not been described. Here, we report the identification of a locus, defective proboscis extension response (dpr), that is required for salt aversion. dpr was expressed in a subset of primary neurons in the gustatory organs and encoded a protein with two Ig-like domains, a single putative transmembrane domain, and a short region C terminal to the transmembrane segment. In addition, DPR defines a large previously unknown group of ≥20 highly related Ig-containing proteins.

Original languageEnglish (US)
Pages (from-to)3463-3472
Number of pages10
JournalJournal of Neuroscience
Volume22
Issue number9
StatePublished - May 1 2002

Keywords

  • Chemoreceptors
  • Drosophila
  • Gustatory response
  • Immunoglobulin repeats
  • Salt aversion
  • Taste

ASJC Scopus subject areas

  • Neuroscience(all)

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