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  • Title: Molecular cloning and genomic organization of a novel receptor from Drosophila melanogaster structurally related to mammalian galanin receptors.
    Author: Lenz C, Søndergaard L, Grimmelikhuijzen CJ.
    Journal: Biochem Biophys Res Commun; 2000 Mar 05; 269(1):91-6. PubMed ID: 10694483.
    Abstract:
    We screened the Berkeley "Drosophila Genome Project" database with "electronic probes" corresponding to conserved amino acid sequences from the five known rat somatostatin receptors. This yielded alignment with a Drosophila genomic clone that contained a DNA sequence coding for a protein, having amino acid sequence identities with the rat galanin receptors. Using PCR with Drosophila cDNA as a template, and oligonucleotide probes coding for the exons of the presumed Drosophila gene, we were able to clone the cDNA for this receptor. The Drosophila receptor has most amino acid sequence identity with the three mammalian galanin receptors (37% identity with the rat galanin receptor type-1, 32% identity with type-2, and 29% identity with type-3). Less sequence identity exists with the mammalian opioid/nociceptin-orphanin FQ receptors (26% identity with the rat micro opioid receptor), and mammalian somatostatin receptors (25% identity with the rat somatostatin receptor type-2). The novel Drosophila receptor gene contains ten introns and eleven exons and is located at the distal end of the X chromosome.
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