title: Aminergic receptors in Drosophila melanogaster: responsiveness of adenylate cyclase to putative neurotransmitters.
abstract: Adenylate cyclase in Drosophila melanogaster heads is stimulated 5-6-fold by low concentrations of octopamine. The octopamine stimulation is inhibited by low concentrations of the alpha-adrenergic ligands phentolamine and dihydroergotamine and of chlorpromazine, but not by low concentrations of the beta-antagonist propranolol and by the alpha-antagonist yohimbine. d-Tubocurarine enhances the octopamine effect. Tyramine, norepinephrine, and epinephrine also stimulate the cyclase, probably via the octopamine receptor. Serotonin and dopamine stimulate Drosophila adenylate cyclase 1.3-1.4-fold; at least the latter putative neurotransmitter seems to interact with a receptor distinct from the octopamine receptor. Prolonged incubation with dopamine in vitro abolishes adenylate cyclase basal activity as well as responsiveness to guanyl nucleotides, NaF, and putative neurotransmitters.
mesh_terms: D000262:Adenylyl Cyclases / Q000378:metabolism*; D000818:Animals; D004331:Drosophila melanogaster / Q000378:metabolism*; D006160:Guanosine Triphosphate / Q000494:pharmacology; D006165:Guanylyl Imidodiphosphate / Q000494:pharmacology; D007700:Kinetics; D009154:Mutation; D018377:Neurotransmitter Agents / Q000494:pharmacology*; D009655:Octopamine / Q000494:pharmacology; D011954:Receptors, Dopamine / Q000378:metabolism*; D011985:Receptors, Serotonin / Q000378:metabolism*; D012969:Sodium Fluoride / Q000494:pharmacology
chemical_list: D018377:Neurotransmitter Agents; D011954:Receptors, Dopamine; D011985:Receptors, Serotonin; D009655:Octopamine; D006165:Guanylyl Imidodiphosphate; D006160:Guanosine Triphosphate; D012969:Sodium Fluoride; D000262:Adenylyl Cyclases