title: Cloning and characterization of a cDNA coding for mouse placental alkaline phosphatase.
abstract: Mouse alkaline phosphatase [ALP; orthophosphoric-monoester phosphohydrolase (alkaline optimum), EC 3.1.3.1] was partially purified from placenta. Data obtained by immunoblotting analysis suggested that the primary structure of this enzyme has a much greater homology to that of human and bovine liver ALPs than to the human placental isozyme. Therefore, a full-length cDNA encoding human liver-type ALP was used as a probe to isolate the mouse placental ALP cDNA. The cloned mouse cDNA is 2459 base pairs long and is composed of an open reading frame encoding a 524-amino acid polypeptide that contains a putative signal peptide of 17 amino acids. Homology at the amino acid level of the mouse placental ALP is 90% to the human liver isozyme but only 55% to the human placental counterpart. RNA blot hybridization results indicate that the mouse placental ALP is encoded by a gene identical to the gene expressed in mouse liver, kidney, and teratocarcinoma stem cells. This gene is therefore evolutionarily highly conserved in mouse and human.
mesh_terms: D000469:Alkaline Phosphatase; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D004247:DNA / Q000235:genetics*; D004274:DNA, Recombinant; D005260:Female; D058851:GPI-Linked Proteins; D006801:Humans; D007527:Isoenzymes / Q000235:genetics*; D051379:Mice; D008813:Mice, Inbred ICR / Q000235:genetics; D008969:Molecular Sequence Data; D010920:Placenta / Q000201:enzymology; D011247:Pregnancy; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity
chemical_list: D004274:DNA, Recombinant; D058851:GPI-Linked Proteins; D007527:Isoenzymes; D004247:DNA; D000469:Alkaline Phosphatase; C019839:alkaline phosphatase, placental