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. 1990 Apr;172(4):1870–1876. doi: 10.1128/jb.172.4.1870-1876.1990

Transcriptional organization of a cloned chemotaxis locus of Bacillus subtilis.

A R Zuberi 1, C W Ying 1, M R Weinreich 1, G W Ordal 1
PMCID: PMC208681  PMID: 2108125

Abstract

A cloned chemotaxis operon has been characterized. Thirteen representative che mutations from different complementation groups were localized on the physical map by recombination experiments. The use of integration plasmids established that at least 10 of these complementation groups within this locus are cotranscribed. An additional three complementation groups may form part of the same transcript. The direction of transcription and the time of expression were determined from chromosomal che-lacZ gene fusions. The promoter was cloned and localized to a 3-kilobase fragment. Expression of beta-galactosidase from this promoter was observed primarily during the logarithmic phase of growth. Three-factor PBS1 cotransduction experiments were performed to order the che locus with respect to adjacent markers. The cheF141 mutation is 70 to 80% linked to pyrD1. This linkage is different from that reported previously (G. W. Ordal, D. O. Nettleton, and J. A. Hoch, J. Bacteriol. 154:1088-1097, 1983). The cheM127 mutation is 57% linked by transformation to spcB3. The gene order determined from all crosses is pyrD-cheF-cheM-spcB.

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Selected References

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