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Brain Res Mol Brain Res. 1994 Nov;27(1):37-44.

Isolation of a novel cDNA encoding a putative membrane receptor with high homology to the cloned mu, delta, and kappa opioid receptors.

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1
Department of Pharmacology, University of Minnesota Medical School, Minneapolis 55455.

Abstract

A rat brain cDNA library was screened for clones homologous to the recently cloned mouse delta-opioid receptor (DOR-1). Among the clones isolated was Hyp 8-1, a clone with a unique nucleotide sequence capable of encoding a putative protein which is 57-58% identical to the amino acid sequences of the cloned delta, mu and kappa opioid receptors, indicating a close relationship of Hyp 8-1 with the opioid receptor family. Several cDNAs representing possible splice variants of Hyp 8-1 were also isolated. Binding studies of COS-7 cells transfected with clone Hyp 8-1 failed to demonstrate specific binding with several 3H-opioid ligands. In situ hybridization studies indicate that the mRNA for Hyp 8-1 is distributed discretely throughout the rat brain, in an overall pattern which is different from that of several other G-protein-coupled seven transmembrane receptors. Thus, it is likely that the Hyp 8-1 cDNA encodes a novel peptide receptor.

PMID:
7877452
[Indexed for MEDLINE]
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