Neuron
Volume 11, Issue 5, November 1993, Pages 903-913
Journal home page for Neuron

Article
Cloning and pharmacological characterization of a rat μ opioid receptor

https://doi.org/10.1016/0896-6273(93)90120-GGet rights and content

Abstract

We have isolated a rat cDNA clone that displays 75% amino acid homology with the mouse δ and rat κ opioid receptors. The cDNA (designated pRMuR-12) encodes a protein of 398 amino acids comprising, in part, seven hydrophobic domains similar to those described for other G protein-linked receptors. Data from binding assays conducted with COS-1 cells transiently transfected with a CMV mammalian expression vector containing the full coding region of pRMuR-12 demonstrated μ receptor selectivity. In situ hybridization mRNA analysis revealed an mRNA distribution in rat brain that corresponds well to the distribution of binding sites labeled with μ-selective ligands. Based upon these observations, we conclude that pRMuR-12 encodes a μ opioid receptor.

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