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EMBO J. 1994 Mar 15;13(6):1325-30.

Agonist-specific coupling of a cloned Drosophila octopamine/tyramine receptor to multiple second messenger systems.

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1
AFRC Laboratory of Molecular Signalling, Department of Zoology, University of Cambridge, UK.

Abstract

A cloned seven transmembrane-spanning Drosophila octopamine/tyramine receptor, permanently expressed in a Chinese hamster ovary cell line, both inhibits adenylate cyclase activity and leads to the elevation of intracellular Ca2+ levels by separate G-protein-coupled pathways. Agonists of this receptor (octopamine and tyramine), differing by only a single hydroxyl group in their side chain, may be capable of differentially coupling it to different second messenger systems. Thus, a single receptor may have a different pharmacological profile depending on which second messenger system is used to assay its efficacy.

PMID:
8137817
PMCID:
PMC394948
[Indexed for MEDLINE]
Free PMC Article
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