title: A gene required for nutritional repression of the Bacillus subtilis dipeptide permease operon.
abstract: An insertion mutation was isolated that resulted in derepressed expression of the Bacillus subtillis dipeptide transport operon (dpp) during the exponential growth phase in rich medium. DNA flanking the site of insertion was found to encode an operon (codVWXY) of four potential open reading frames (ORFs). The deduced product of the codV ORF is similar to members of the lambda Int family; CodW and CodX are homologous to HsIV and HsIU, two putative heat-shock proteins from Escherichia coli, and to LapC and LapA, two gene products of unknown function from Pasteurella haemolytica. CodX also shares homology with a family of ATPases, including ClpX, a regulatory subunit of the E. coli ClpP protease. CodY does not have any homologues in the data-bases. The insertion mutation and all previously isolated spontaneous cod mutations were found to map in codY. In-frame deletion mutations in each of the other cod genes revealed that only codY is required for repression of dpp in nutrient-rich medium. The codY mutations partially relieved amino acid repression of the histidine utilization (hut) operon but had no effect on regulation of certain other early stationary phase-induced genes, such as spoVG and gsiA.
authors.affiliation: Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
authors.forename: F J
authors.initials: FJ
authors.lastname: Slack
authors.forename: P
authors.initials: P
authors.lastname: Serror
authors.forename: E
authors.initials: E
authors.lastname: Joyce
authors.forename: A L
authors.initials: AL
authors.lastname: Sonenshein
mesh_terms: D000595:Amino Acid Sequence; D001412:Bacillus subtilis / Q000235:genetics* / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics* / Q000502:physiology; D001483:Base Sequence; D003001:Cloning, Molecular; D004268:DNA-Binding Proteins; D017353:Gene Deletion; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D026901:Membrane Transport Proteins / Q000096:biosynthesis* / Q000235:genetics; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D009876:Operon / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D012097:Repressor Proteins / Q000235:genetics* / Q000378:metabolism / Q000502:physiology; D015183:Restriction Mapping; D017386:Sequence Homology, Amino Acid
chemical_list: D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D026901:Membrane Transport Proteins; D011993:Recombinant Fusion Proteins; D012097:Repressor Proteins; C121793:codV protein, Bacillus subtilis; C037230:oligopeptide permease, Bacteria