Figure 1.

Alignment of the turnover element-containing region of RpoS with the corresponding region of RpoD. Partial amino acid sequences of RpoS and RpoD between the positions indicated are given. Amino acids at positions that were mutated in the present study are given in larger and bold capital letters. Regions important for transcription initiation as well as RpoD residues that are included in a partial crystal structure (34) are indicated. Amino acids in RpoD with a direct role in promoter recognition are indicated by ∗. Arrows indicate fusion joints of translational rpoS∷lacZ fusions (5, 8). In addition, the position of an in-frame deletion that interferes with RpoS proteolysis is shown (8).