title: Nucleotide sequence of bovine prolactin messenger RNA. Evidence for sequence polymorphism.
abstract: Hybrid molecules containing DNA sequences complementary to bovine pituitary mRNA were constructed in the Pst I site of pBR322 by the dC . dG tailing technique. Recombinant plasmids containing bovine prolactin (bPRL) sequences were amplified in bacteria and identified by hybridization to purified [32P]bPRL cDNA sequences. Nucleotide sequence analysis was performed on the inserts from two of the positive clones. One clone, pBPRL72, contained a 982-base pair insert that included 67 nucleotides of the 5'-untranslated region, the complete coding region of the preprolactin protein (690 nucleotides), and the entire 3'-untranslated region (150 nucleotides) of bPRL mRNA. The nucleotide sequence analysis of clone pBPRL72 predicted the sequence of a 30-amino acid signal peptide and confirmed the published amino acid sequence of the protein with one exception. A comparison of the pBPRL72 cDNA sequence with a second bPRL clone, pBPRL4, revealed four silent nucleotide differences. Three of the base changes occurred in the third position of amino acid codons, and one occurred in the 3'-noncoding region. The sequence polymorphism suggests the existence of alleles or multiple loci for bPRL that do not alter the protein structure.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002417:Cattle; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant; D010903:Pituitary Gland, Anterior / Q000378:metabolism; D011110:Polymorphism, Genetic; D011388:Prolactin / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics*
chemical_list: D004274:DNA, Recombinant; D012333:RNA, Messenger; D011388:Prolactin; D004262:DNA Restriction Enzymes