Structure and mode of action of microcin 7, an antibacterial peptide produced by Escherichia coli

Abstract
Microcin 7 is a small peptide produced and excreted to the culture medium by stationary-phase E. coli cells harboring the pMccC7 plasmid (formerly named pRYC7). This peptide inhibited the growth of the enterobacteria phylogenetically closer to E. coli, apparently by blocking protein biosynthesis. Microcin 7 is evidently a linear heptapeptide blocked at both ends.