title: Identification of the junction between the glutamine amidotransferase and carbamyl phosphate synthetase domains of the mammalian CAD protein.
abstract: The hamster CAD gene encodes a protein that catalyzes the first three steps of pyrimidine biosynthesis. We have sequenced a portion of a CAD cDNA and determined the location of the carbamyl phosphate synthetase II coding region. Subdomains coding for the glutamine hydrolyzing and carbamyl phosphate synthesizing functions have been identified through their high degree of similarity to carbamyl phosphate synthetase genes from a variety of organisms. The proline-rich junction between the glutaminase and synthetase domains, however, does not appear to be conserved among carbamyl phosphate synthetases.
mesh_terms: D000581:Amidohydrolases / Q000235:genetics*; D000595:Amino Acid Sequence; D000818:Animals; D000878:Anthranilate Synthase; D001221:Aspartate Carbamoyltransferase / Q000235:genetics*; D001483:Base Sequence; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing) / Q000235:genetics*; D006224:Cricetinae; D004247:DNA / Q000235:genetics; D004080:Dihydroorotase / Q000235:genetics*; D004331:Drosophila melanogaster / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005796:Genes; D008025:Ligases / Q000235:genetics*; D008647:Mesocricetus; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000235:genetics*; D019884:Nitrogenous Group Transferases; D009876:Operon; D010957:Plasmids; D012441:Saccharomyces cerevisiae / Q000235:genetics; D012689:Sequence Homology, Nucleic Acid; D014166:Transferases / Q000235:genetics*
chemical_list: C033626:CAD trifunctional enzyme; D009097:Multienzyme Complexes; D004247:DNA; D014166:Transferases; D001221:Aspartate Carbamoyltransferase; D019884:Nitrogenous Group Transferases; D000581:Amidohydrolases; D004080:Dihydroorotase; D000878:Anthranilate Synthase; C020655:anthranilate synthase, glutamine amidotransferase subunit; D008025:Ligases; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)