Antibacterial peptide, active against enterobacteria including species of Klebsiella, Salmonella, Shigella, Yersinia and Proteus, and strains of E.coli. Inhibits protein translation by blocking aspartyl-tRNA synthetase function and inhibiting production of aminoacetylated tRNA-Asp. The peptide moiety allows entry into the bacterial cell, where it undergoes proteolytic cleavage to release the aspartyl adenylate analog, which is responsible for aspartyl-tRNA synthetase inhibition. Can be processed by the non-specific oligopeptidases PepA, PepB and PepN.