Molecular cloning and functional expression of a Drosophila receptor for the neuropeptides capa-1 and -2.
The Drosophila Genome Project website contains an annotated gene (CG14575) for a G protein-coupled receptor. We cloned this receptor and found that the cloned cDNA did not correspond to the annotated gene; it partly contained different exons and additional exons located at the 5(')-end of the annotated gene. We expressed the coding part of the cloned cDNA in Chinese hamster ovary cells and found that the receptor was activated by two neuropeptides, capa-1 and -2, encoded by the Drosophila capability gene. Database searches led to the identification of a similar receptor in the genome from the malaria mosquito Anopheles gambiae (58% amino acid residue identities; 76% conserved residues; and 5 introns at identical positions within the two insect genes). Because capa-1 and -2 and related insect neuropeptides stimulate fluid secretion in insect Malpighian (renal) tubules, the identification of this first insect capa receptor will advance our knowledge on insect renal function.
Iversen
Annette
A
Department of Cell Biology, Zoological Institute, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark.
Cazzamali
Giuseppe
G
Williamson
Michael
M
Hauser
Frank
F
Grimmelikhuijzen
Cornelis J P
CJ
D000595:Amino Acid Sequence; D000818:Animals; D000852:Anopheles / Q000235:genetics; D001483:Base Sequence; D016466:CHO Cells; D003001:Cloning, Molecular; D006224:Cricetinae; D029721:Drosophila Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000502:physiology*; D008969:Molecular Sequence Data; D009479:Neuropeptides / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D016366:Open Reading Frames; D011956:Receptors, Cell Surface / Q000235:genetics / Q000378:metabolism*; D016415:Sequence Alignment
D029721:Drosophila Proteins; D009479:Neuropeptides; D011956:Receptors, Cell Surface; C455043:capa protein, Drosophila