Growth-phase-dependent expression of the osmotically inducible gene osmC of Escherichia coli K-12.

The transcription of the osmotically inducible gene osmC of Escherichia coli is initiated by two overlapping promoters, osmCp1 and osmCp2. The existence of these two promoters was confirmed by site-directed mutagenesis. osmC transcription is regulated by the growth phase. In a medium of low osmotic pressure, expression of osmC is induced at the onset of… (More)