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. 1988 Jun;170(6):2742–2748. doi: 10.1128/jb.170.6.2742-2748.1988

Transcriptional regulation of a promoter in the men gene cluster of Bacillus subtilis.

P Miller 1, J Mueller 1, K Hill 1, H Taber 1
PMCID: PMC211197  PMID: 3131310

Abstract

The control of men gene expression during growth and sporulation of Bacillus subtilis was examined at the transcriptional level. Two different approaches were used. (i) Steady-state levels of men-specific mRNA were measured directly. (ii) A men'-lacZ gene fusion was constructed. In both cases, it was observed that men promoter activity was maximal at the onset of sporulation and declined soon thereafter. These kinetics were similar to the pattern of menaquinone accumulation previously observed. Expression from the men promoter was independent of the presence of the products of the spo0A and spo0H genes and was enhanced by addition of glucose and glutamine to the culture medium. DNA sequence analysis of the promoter region revealed a potential recognition site for the principal vegetative form of RNA polymerase but not for any of the known minor polymerase forms. The functionality in vivo of the promoter sequence was confirmed by high-resolution S1 nuclease mapping of the transcript start site. An additional sequence element was identified that is shared by the sdhA, citG, and ctaA promoters and may indicate a common regulatory mechanism in the expression of these genes.

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Selected References

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