title: Cloning and sequencing of the pyrG encoding cytidine 5'-triphosphate synthetase from Mycobacterium bovis BCG.
abstract: The pyrG gene encoding cytidine 5'-triphosphate (CTP) synthetase which catalyzes the terminal reaction for de novo synthesis of pyrimidine nucleotides was cloned and sequenced from Mycobacterium bovis BCG. The BCG pyrG was screened in lambda ZAPII library employing a DNA probe which was constructed from PCR based on a consensus pattern of glutamine amidotransferase type I. The BCG CTP synthetase deduced from a nucleotide sequence consisting of 586 amino acid residues with a calculated molecular weight of 63,642 daltons. Alignment of BCG CTP synthetase with all sequences available in GenBank indicates that the residues suggested as a catalytic triad for glutamine hydrolysis at the carboxyl terminal domain and an amino terminal segment are completely conserved among all CTP synthetases.
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology, Taejon.
authors.forename: J H
authors.initials: JH
authors.lastname: Kim
authors.forename: J K
authors.initials: JK
authors.lastname: Kim
authors.forename: Y K
authors.initials: YK
authors.lastname: Choe
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D001665:Binding Sites; D019731:Carbon-Nitrogen Ligases / Q000235:genetics*; D002384:Catalysis; D003001:Cloning, Molecular; D008969:Molecular Sequence Data; D009163:Mycobacterium bovis / Q000201:enzymology / Q000235:genetics*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D001426:Bacterial Proteins; D019731:Carbon-Nitrogen Ligases; C019951:CTP synthetase