Anti-infective agent 12

Anti-infective agent 12 (Compound A09) is a competitive inhibitor of type I signal peptidease (SPase I), with an IC50 of 4.475 μM and a Kd of 16.3 μM. Anti-infective agent 12 has the ability to disrupt bacterial membranes and remove biofilms. Anti-infective agent 12 exhibits potent bactericidal activity against Gram-positive bacteria, with MIC values of 4, 4, 8, and 8 μg/mL for Staphylococcus aureus, Enterococcus faecalis, Enterococcus faecium, and Streptococcus suis, respectively. Anti-infective agent 12 remains effective against multi-drug resistant strains, but has weaker activity against Gram-negative bacteria (such as Escherichia coli and Salmonella), with MIC values > 64 μg/mL. Anti-infective agent 12 has low hemolytic activity and shows significant efficacy in mouse skin infection models[1].