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J Bacteriol. 1995 Nov;177(22):6679-83.

Expression of kinA and accumulation of sigma H at the onset of sporulation in Bacillus subtilis.

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Institute of Molecular and Cellular Biosciences, University of Tokyo, Japan.


Induction of the Bacillus subtilis kinA gene, which codes for a major kinase of the phosphorelay pathway, required the spo0H gene, coding for the sigma H protein, but not the genes spo0A, spo0B, and spo0F at the onset of sporulation. Also, the levels of sigma H in spo0A, spo0B, and spo0F mutants were increased at the onset of sporulation, though induction of spo0H transcription in all of these mutants was appreciably inhibited. In addition, kinA expression was almost completely eliminated in a medium supplemented with excess glucose and glutamine, even though the usual stationary-phase-associated increase in sigma H was observed under these conditions.

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