title: Carbamoyl phosphate synthetase (CPSase) in the PYR1-3 multigene of Dictyostelium discoideum.
abstract: We have isolated and sequenced the genomic DNA from the slime-mould Dictyostelium discoideum multi-gene (PYR1-3) encoding the carbamoyl phosphate synthetase II domain (CPSase, EC.6.3.5.5). We describe sequencing by oligo-walking directly on PCR product in the solid-phase, avoiding subcloning procedures. The 2.4 kb fragment completes the sequence of the PYR1-3 gene, has no introns, and has the same structure as the rudimentary gene of Drosophila melanogaster. Comparison with the carbamoyl phosphate synthetases (CPSase I and CPSase II) of other species supports the hypothesis that this gene has arisen by tandem duplication from a smaller common ancestral gene in the progenote.
authors.affiliation: MRC Molecular Genetics Unit, MRC Centre, Cambridge.
authors.forename: G
authors.initials: G
authors.lastname: Elgar
authors.forename: J P
authors.initials: JP
authors.lastname: Schofield
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing) / Q000235:genetics*; D016386:Chromosome Walking; D004271:DNA, Fungal / Q000235:genetics; D016054:DNA, Protozoan / Q000235:genetics; D004023:Dictyostelium / Q000201:enzymology / Q000235:genetics*; D008969:Molecular Sequence Data; D005810:Multigene Family; D016133:Polymerase Chain Reaction; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004271:DNA, Fungal; D016054:DNA, Protozoan; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)