title: Insect sex-pheromone signals mediated by specific combinations of olfactory receptors.
abstract: We describe two male-specific olfactory receptors (ORs) in the silk moth, Bombyx mori, that are mutually exclusively expressed in a pair of adjacent pheromone-sensitive neurons of male antennae: One is specifically tuned to bombykol, the sex pheromone, and the other to bombykal, its oxidized form. Both pheromone ORs are coexpressed with an OR from the highly conserved insect OR subfamily. This coexpression promotes the functional expression of pheromone receptors and confers ligand-stimulated nonselective cation channel activity. The same effects were also observed for general ORs. Both odorant and pheromone signaling pathways are mediated by means of a common mechanism in insects.
authors.affiliation: Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8562, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Nakagawa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sakurai
authors.forename: Takaaki
authors.initials: T
authors.lastname: Nishioka
authors.forename: Kazushige
authors.initials: K
authors.lastname: Touhara
mesh_terms: D000466:Alkadienes / Q000378:metabolism / Q000494:pharmacology*; D000818:Animals; D012831:Bombyx / Q000235:genetics / Q000502:physiology*; D002412:Cations / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005233:Fatty Alcohols / Q000378:metabolism / Q000494:pharmacology*; D005260:Female; D017344:Genes, Insect; D017403:In Situ Hybridization; D019476:Insect Proteins / Q000235:genetics / Q000502:physiology*; D007473:Ion Channels / Q000502:physiology; D008024:Ligands; D008297:Male; D008969:Molecular Sequence Data; D009812:Odorants; D018034:Olfactory Receptor Neurons / Q000502:physiology; D018408:Patch-Clamp Techniques; D018035:Receptors, Odorant / Q000235:genetics / Q000502:physiology*; D012679:Sense Organs / Q000502:physiology; D012724:Sex Attractants / Q000494:pharmacology* / Q000502:physiology*; D015398:Signal Transduction; D014982:Xenopus laevis
chemical_list: D000466:Alkadienes; D002412:Cations; D005233:Fatty Alcohols; D019476:Insect Proteins; D007473:Ion Channels; D008024:Ligands; D018035:Receptors, Odorant; D012724:Sex Attractants; C066482:bombykal; C006787:bombykol