title: Primary structure of the deoxyguanosine triphosphate triphosphohydrolase-encoding gene (dgt) of Escherichia coli.
abstract: The complete nucleotide sequence has been determined for a 2027-bp region that encompasses the structural gene (dgt) encoding deoxyguanosine triphosphate triphosphohydrolase (dGTPase) from Escherichia coli. The gene resides between the htrA and dapD loci at 3.75-3.8' on the bacterial chromosome. Using homologous recombination in a recD recipient, a dgt- bacterial strain was constructed that was deficient in producing functional dGTPase. Comparison of dGTP pools in this and other strains revealed that dGTPase synthesized in vivo does to some degree modulate the level of dGTP in the bacterial cell, yet the magnitude of this modulation may be insufficient to explain the physiological function of dGTPase.
authors.affiliation: McCollum-Pratt Institute, Department of Biology, Johns Hopkins University, Baltimore, MD 21218.
authors.forename: S
authors.initials: S
authors.lastname: Quirk
authors.forename: S K
authors.initials: SK
authors.lastname: Bhatnagar
authors.forename: M J
authors.initials: MJ
authors.lastname: Bessman
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D003001:Cloning, Molecular / Q000379:methods; D003848:Deoxyguanine Nucleotides / Q000378:metabolism; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D010744:Phosphoric Monoester Hydrolases / Q000235:genetics*; D010957:Plasmids; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid
chemical_list: D003848:Deoxyguanine Nucleotides; C029603:deoxyguanosine triphosphate; D010744:Phosphoric Monoester Hydrolases