FIG. 3.
Amino acid sequence alignment of SkgA with known transcriptional regulators. Asterisks designate putative helix-turn-helix DNA binding motifs in TipAL from S. lividans and NolA from Bradyrhizobium sp. Identities with SkgA are indicated by vertical lines. TipAS, lacking the amino-terminal DNA binding domain and containing the carboxyl-terminal ligand binding domain, corresponds to residues 110 to 253 of TipAL. The Tn5 insertion in skgA occurs within the codon for the Ala residue designated by the arrowhead. The amino terminus of SkgA was located by homology and may be Val-1 or Val-5.