A 53-base-pair inverted repeat negatively regulates expression of the adjacent and divergently oriented cytochrome P450(BM-1) gene and its regulatory gene, bm1P1, in Bacillus megaterium.
To study the role of the cis-acting element(s) in controlling the expression of the cytochrome P450(BM-1) gene and its upstream regulatory gene, bm1P1, in Bacillus megaterium, various deletion derivatives were constructed. A 53-bp inverted repeat located midway between the P450(BM-1) gene and bm1P1 gene was found in vivo to negatively regulate the expression of both genes, the regulation of which may occur at the transcriptional level. The promoter of the P450(BM-1), gene was also identified and found to be similar to those recognized by the sigmaA RNA polymerase of Bacillus subtilis. Possible mechanisms by which the 53-bp inverted repeat regulates the gene expression are discussed.
Shaw
G C
GC
Institute of Biochemistry, School of Life Science, National Yang-Ming University, Taipei, Taiwan, Republic of China.
Sung
C C
CC
Liu
C H
CH
Kao
H S
HS
D001410:Bacillus megaterium / Q000235:genetics*; D001412:Bacillus subtilis / Q000201:enzymology; D001426:Bacterial Proteins; D001483:Base Sequence; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics*; D012321:DNA-Directed RNA Polymerases; D015964:Gene Expression Regulation, Bacterial / Q000235:genetics*; D005798:Genes, Bacterial / Q000235:genetics; D005809:Genes, Regulator / Q000235:genetics; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic / Q000235:genetics; D012329:RNA, Bacterial / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D011993:Recombinant Fusion Proteins; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics*; D012808:Sigma Factor; D014157:Transcription Factors / Q000235:genetics*; D014158:Transcription, Genetic / Q000235:genetics
C094974:BM1P1 protein, Bacillus megaterium; D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D012329:RNA, Bacterial; D012333:RNA, Messenger; D011993:Recombinant Fusion Proteins; D012808:Sigma Factor; D014157:Transcription Factors; D003577:Cytochrome P-450 Enzyme System; C063505:RNA polymerase sigma A; D012321:DNA-Directed RNA Polymerases