title: Preferential expression of the gene for a putative inositol 1,4,5-trisphosphate receptor homologue in the mushroom bodies of the brain of the worker honeybee Apis mellifera L.
abstract: A gene expressed preferentially in the mushroom bodies of the brain of the worker honeybee Apis mellifera L. was identified by the differential display method and its cDNA was isolated. The cDNA fragment of 534 bp (clone A1) contained an open reading frame encoding 177 amino acid residues having 78, 72, 70, 59 and 55% sequence identities with the inositol 1,4,5-trisphosphate (IP3) receptors of Drosophila melanogaster, Xenopus laevis and humans (types 1, 2 and 3), respectively, suggesting that it encodes a putative IP3 receptor homologue of the honeybee. In situ hybridization revealed that the gene encoding clone A1 was expressed preferentially in the mushroom bodies and not in the optic lobes, antennal lobes and central bodies; in the mushroom body, it was expressed strongly in the large type Kenyon cells and weakly in the small type Kenyon cells. Reverse transcription polymerase chain reaction analysis showed that the gene was expressed strongly in the head and weakly in the antennae, legs, thorax, and abdomen. These results suggest that the A1 gene product plays a crucial role in neural transmission in the mushroom bodies of the worker bee brain.
authors.affiliation: Faculty of Pharmaceutical Sciences, University of Tokyo, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Kamikouchi
authors.forename: H
authors.initials: H
authors.lastname: Takeuchi
authors.forename: M
authors.initials: M
authors.lastname: Sawata
authors.forename: K
authors.initials: K
authors.lastname: Ohashi
authors.forename: S
authors.initials: S
authors.lastname: Natori
authors.forename: T
authors.initials: T
authors.lastname: Kubo
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001516:Bees / Q000235:genetics*; D001522:Behavior, Animal; D001921:Brain / Q000033:anatomy & histology; D001923:Brain Chemistry / Q000235:genetics*; D015220:Calcium Channels / Q000235:genetics*; D003001:Cloning, Molecular; D003657:Decision Making; D017403:In Situ Hybridization; D053496:Inositol 1,4,5-Trisphosphate Receptors; D008568:Memory; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000302:isolation & purification; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D015220:Calcium Channels; D053496:Inositol 1,4,5-Trisphosphate Receptors; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear