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Anabolic ornithine carbamoyltransferase of Pseudomonas aeruginosa: nucleotide sequence and transcriptional control of the argF structural gene. 1988

Y Itoh, and L Soldati, and V Stalon, and P Falmagne, and Y Terawaki, and T Leisinger, and D Haas
Department of Bacteriology, Shinshu University School of Medicine, Matsumoto, Japan.

In Pseudomonas aeruginosa PAO the anabolic ornithine carbamoyltransferase (OTCase, EC 2.1.3.3) is the product of the argF gene and the only arginine biosynthetic enzyme whose synthesis is repressible by arginine. We have determined the complete nucleotide sequence of the argF gene including its promoter-control region. The deduced amino acid sequence of the anabolic OTCase consists of 305 residues (Mr 33,924), and this was confirmed by the N-terminal amino acid sequence, the total amino acid composition, and the subunit Mr of the purified enzyme. The native anabolic OTCase (Mr 110,000 to 125,000) was found to be a trimer by cross-linking experiments. P. aeruginosa also has a catabolic OTCase (the arcB gene product), which catalyzes the reverse reaction of the anabolic conversion. At the nucleotide sequence level, the P. aeruginosa argF gene had 52.4% identity with the arcB gene. The Escherichia coli argF and argI genes, which code for anabolic OTCase isoenzymes, had 47.3 and 44.9% identity, respectively, with the P. aeruginosa argF sequence. This suggests that these four genes have evolved from a common ancestral gene. The arcB gene appears to be more closely related to the E. coli argF gene than to the P. aeruginosa argF gene. Two transcripts (mRNA-1, mRNA-2) of the P. aeruginosa argF gene were identified by S1 mapping. The transcription initiation site for mRNA-1 was preceded by sequences having partial homology with the E. coli -35 and -10 consensus promoter sequences. No sequence similar to consensus promoters of enteric bacteria was found upstream of the 5' end of mRNA-2. E. coli carrying a P. aeruginosa argF+ recombinant plasmid produced mRNA-1 with low efficiency but no (or very little) mRNA-2. Arginine repressed argF transcription in P. aeruginosa. In the argF promoter region no sequence homologous to the "arg box" (arginine operator module) of E. coli was found. The mechanism of arginine repression in P. aeruginosa thus appears to be different from that in E. coli.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009954 Ornithine Carbamoyltransferase A urea cycle enzyme that catalyzes the formation of orthophosphate and L-citrulline (CITRULLINE) from CARBAMOYL PHOSPHATE and L-ornithine (ORNITHINE). Deficiency of this enzyme may be transmitted as an X-linked trait. EC 2.1.3.3. Ornithine Transcarbamylase,Ornithine Carbamylphosphate Transferase,Carbamoyltransferase, Ornithine,Carbamylphosphate Transferase, Ornithine,Transcarbamylase, Ornithine,Transferase, Ornithine Carbamylphosphate
D011401 Promoter Regions, Genetic DNA sequences which are recognized (directly or indirectly) and bound by a DNA-dependent RNA polymerase during the initiation of transcription. Highly conserved sequences within the promoter include the Pribnow box in bacteria and the TATA BOX in eukaryotes. rRNA Promoter,Early Promoters, Genetic,Late Promoters, Genetic,Middle Promoters, Genetic,Promoter Regions,Promoter, Genetic,Promotor Regions,Promotor, Genetic,Pseudopromoter, Genetic,Early Promoter, Genetic,Genetic Late Promoter,Genetic Middle Promoters,Genetic Promoter,Genetic Promoter Region,Genetic Promoter Regions,Genetic Promoters,Genetic Promotor,Genetic Promotors,Genetic Pseudopromoter,Genetic Pseudopromoters,Late Promoter, Genetic,Middle Promoter, Genetic,Promoter Region,Promoter Region, Genetic,Promoter, Genetic Early,Promoter, rRNA,Promoters, Genetic,Promoters, Genetic Middle,Promoters, rRNA,Promotor Region,Promotors, Genetic,Pseudopromoters, Genetic,Region, Genetic Promoter,Region, Promoter,Region, Promotor,Regions, Genetic Promoter,Regions, Promoter,Regions, Promotor,rRNA Promoters
D011550 Pseudomonas aeruginosa A species of gram-negative, aerobic, rod-shaped bacteria commonly isolated from clinical specimens (wound, burn, and urinary tract infections). It is also found widely distributed in soil and water. P. aeruginosa is a major agent of nosocomial infection. Bacillus aeruginosus,Bacillus pyocyaneus,Bacterium aeruginosum,Bacterium pyocyaneum,Micrococcus pyocyaneus,Pseudomonas polycolor,Pseudomonas pyocyanea
D003001 Cloning, Molecular The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells. Molecular Cloning
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D005796 Genes A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms. Cistron,Gene,Genetic Materials,Cistrons,Genetic Material,Material, Genetic,Materials, Genetic
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D014158 Transcription, Genetic The biosynthesis of RNA carried out on a template of DNA. The biosynthesis of DNA from an RNA template is called REVERSE TRANSCRIPTION. Genetic Transcription

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