. 2003 Apr;185(7):2387–2391. doi: 10.1128/JB.185.7.2387-2391.2003

TABLE 1.

Promoter sequences recognized by ECF σ factors

ECF σ factor	Nucleotide sequence		Reference
ECF σ factor	−35 element	−10 element	Reference
FecI	GAAAAT	TGTCCT
PA2468	GAAAAT^a	TGTCGG^a	25
PA3899	GATATT^a	TTTTTC^a	25
SigR	GGGAAT	GTT	10
SigB	GGgaac^b	cGTTa^b	10
AlgU/RpoE	GAAC	TCT	29
CarQ	GAAAC	CGT	29
SigW	TGAAAC	CGTA	29
SigX	TGTAACT	CGAC	29
PvdS	TAAAT	CGT	29

Alignment of sequences of the putative pa2466 and pa3901 promoters with that of the fecA promoter. The amino acid sequences of the PA2468 and PA3899 σ factors in the region 4.2 are very similar to that of FecI.

Lowercase letters indicate sites of lower homology.