Cloning, characterization, and inactivation of the Bacillus brevis lon gene.

AUTOR(ES)

Ito, K

RESUMO

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.

Documentos Relacionados

• Cloning, nucleotide sequence, and expression of the Bacillus subtilis lon gene.
• Cloning, characterization, and multiple chromosomal integration of a Bacillus alkaline protease gene.
• Cloning, characterization, and sequence of the yeast DNA topoisomerase I gene.
• Molecular cloning, characterization, and expression of the Tipula iridescent virus capsid gene.
• Cloning, characterization, and expression of the spoVB gene of Bacillus subtilis.