title: Cloning, characterization, and inactivation of the Bacillus brevis lon gene.
abstract: A gene of Bacillus brevis HPD31 analogous to the Escherichia coli lon gene has been cloned and characterized. The cloned gene (B. brevis lon gene) encodes a polypeptide of 779 amino acids with a molecular weight of 87,400 which resembles E. coli protease La, the lon gene product. Fifty-two percent of the amino acid residues of the two polypeptides were identical. The ATP-binding sequences found in E. coli protease La were highly conserved. The promoter of the B. brevis lon gene resembled that recognized by the major RNA polymerase of Bacillus subtilis and did not contain sequences homologous to the E. coli heat shock promoters. The B. brevis lon gene was inactivated by insertion of the neomycin resistance gene. A mutant B. brevis carrying the inactivated lon gene showed diminished ability for the degradation of abnormal polypeptides synthesized in the presence of puromycin.
authors.affiliation: Department of Food Science and Technology, Faculty of Agriculture, Nagoya University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ito
authors.forename: S
authors.initials: S
authors.lastname: Udaka
authors.forename: H
authors.initials: H
authors.lastname: Yamagata
mesh_terms: D049069:ATP-Dependent Proteases; D000595:Amino Acid Sequence; D001407:Bacillus / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics; D001483:Base Sequence; D003001:Cloning, Molecular; D004252:DNA Mutational Analysis; D004269:DNA, Bacterial / Q000235:genetics; D029968:Escherichia coli Proteins; D005798:Genes, Bacterial; D006360:Heat-Shock Proteins; D008969:Molecular Sequence Data; D009838:Oligodeoxyribonucleotides / Q000737:chemistry; D011401:Promoter Regions, Genetic; D049070:Protease La; D014176:Protein Biosynthesis; D012045:Regulatory Sequences, Nucleic Acid; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid; D012697:Serine Endopeptidases / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D029968:Escherichia coli Proteins; D006360:Heat-Shock Proteins; D009838:Oligodeoxyribonucleotides; D049069:ATP-Dependent Proteases; D012697:Serine Endopeptidases; C483567:Lon protein, E coli; D049070:Protease La