The nucleotide sequence surrounding the promoter region of colicin E1 gene.

The nucleotide sequence of 570 bp, covering the N-terminal portion of the colicin E1 gene, was determined. The sequence of the N-terminal four amino acids of the colicin E1 protein, determined by manual Edman degradation, agreed with that predicted from the nucleotide sequence. From analysis of the 5'-terminal sequences of RNAs synthesized in vitro, the promoter and operator regions of the colicin E1 gene were assigned. These data indicate the existence of two promoters, one of which is located in the coding region for colicin E1. DNA sequence homology of 16 bp was found between the putative operator regions of the colicin E1 and recA genes.