title: Molecular cloning and expression of mouse placental lactogen I complementary deoxyribonucleic acid.
abstract: The mouse midpregnancy lactogen or placental lactogen I (mPL-I) is encoded by a 1.0-kilobase mRNA that appears transiently during gestation, with maximal amounts accumulating in the placenta at day 10 of pregnancy. Several cDNA clones for mPL-I have been isolated from a lambda gt11 expression library constructed from day 10-placental RNA. The cDNA sequence indicates that mPL-I is synthesized as a 224 amino acid precursor, and is secreted as a 194 amino acid glycosylated hormone. The deduced amino acid sequence of mPL-I is highly homologous to the known members of the PRL family in the mouse, and hybridization analysis indicates that the mouse genome contains several mPL-I genes. Introduction of the mPL-I cDNA in an expression vector into cultured mouse cells results in the synthesis and secretion of glycosylated mPL-I protein that is recognized by anti-mPL-I antiserum and is biologically active.
authors.affiliation: Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, Evanston, Illinois 60201.
authors.forename: P
authors.initials: P
authors.lastname: Colosi
authors.forename: F
authors.initials: F
authors.lastname: Talamantes
authors.forename: D I
authors.initials: DI
authors.lastname: Linzer
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D005260:Female; D051379:Mice; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010920:Placenta / Q000737:chemistry; D010928:Placental Lactogen / Q000096:biosynthesis / Q000235:genetics*; D011233:Precipitin Tests; D011247:Pregnancy; D014176:Protein Biosynthesis / Q000502:physiology; D012333:RNA, Messenger / Q000378:metabolism; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid
chemical_list: D012333:RNA, Messenger; D004247:DNA; D010928:Placental Lactogen