Abstract
Multidrug-resistant bacteria cause immense public health concerns as once effective antibiotics no longer work against even common infections. Concomitantly, there has been a decline in the discovery of new antibiotics, and the current global clinical pipeline is woefully inadequate, especially against resistant Gram-negative bacteria. One major contribution to Gram-negative resistance is the presence of a protective outer membrane. Consequently, an appealing option for tackling resistance is to adversely affect that outer membrane. With that in mind, we define the response regulator PhoP as a target for new 2-aminoimidazole compounds and show that they affect the integrity of the outer membrane in resistant strains of Escherichia coli and Klebsiella pneumoniae. We also provide empirical evidence for the 2-aminoimidazole mechanism of action.
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