title: mu opiate receptor: cDNA cloning and expression.
abstract: mu opiate receptors recognize morphine with high affinity. A 2.1-kb rat brain cDNA whose predicted translation product displays 63% identity with recently described delta and kappa opiate receptor sequences was identified through polymerase chain reaction and cDNA homology approaches. This cDNA recognizes a 10.5-kb mRNA that is expressed in thalamic neurons. COS-cell expression confers naloxonazine-, Na(+)-, and GTP-sensitive binding of mu but not delta or kappa opioid ligands. Expressing cells bind morphine, [D-Ala2,N-methyl-Phe4,glyol5]enkephalin (DAMGO), and [D-Ala2,D-Leu5]enkephalin (DADLE) with nanomolar or subnanomolar affinities, defining a mu opiate receptor that avidly recognizes analgesic and euphoric opiate drugs and opioid peptides.
authors.affiliation: Molecular Neurobiology Branch, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD.
authors.forename: J B
authors.initials: JB
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Imai
authors.forename: C M
authors.initials: CM
authors.lastname: Eppler
authors.forename: P
authors.initials: P
authors.lastname: Gregor
authors.forename: C E
authors.initials: CE
authors.lastname: Spivak
authors.forename: G R
authors.initials: GR
authors.lastname: Uhl
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001921:Brain / Q000378:metabolism*; D003001:Cloning, Molecular; D017931:DNA Primers; D018076:DNA, Complementary / Q000737:chemistry / Q000378:metabolism*; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; D016308:Enkephalin, Leucine-2-Alanine / Q000378:metabolism; D004745:Enkephalins / Q000378:metabolism; D004926:Escherichia coli; D015870:Gene Expression; D006801:Humans; D007700:Kinetics; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000096:biosynthesis / Q000302:isolation & purification; D051381:Rats; D017450:Receptors, Opioid, mu / Q000096:biosynthesis* / Q000302:isolation & purification / Q000378:metabolism; D011994:Recombinant Proteins / Q000378:metabolism; D017386:Sequence Homology, Amino Acid
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D004745:Enkephalins; D012333:RNA, Messenger; D017450:Receptors, Opioid, mu; D011994:Recombinant Proteins; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; D016308:Enkephalin, Leucine-2-Alanine