title: Design, synthesis, and antibacterial properties of dual-ligand inhibitors of acetyl-CoA carboxylase.
abstract: There is an urgent demand for the development of new antibiotics due to the increase in drug-resistant pathogenic bacteria. A novel target is the multifunctional enzyme acetyl-CoA carboxylase (ACC), which catalyzes the first committed step in fatty acid synthesis and consists of two enzymes: biotin carboxylase and carboxyltransferase. Covalently attaching known inhibitors against these enzymes with saturated hydrocarbon linkers of different lengths generated dual-ligand inhibitors. Kinetic results revealed that the dual-ligands inhibited the ACC complex in the nanomolar range. Microbiology assays showed that the dual-ligand with a 15-carbon linker did not exhibit any antibacterial activity, while the dual-ligand with a 7-carbon linker displayed broad-spectrum antibacterial activity as well as a decreased susceptibility in the development of bacterial resistance. These results suggest that the properties of the linker are vital for antibacterial activity and show how inhibiting two different enzymes with the same compound increases the overall potency while also impeding the development of resistance.
authors.affiliation: Division of Biochemistry and Molecular Biology, Louisiana State University , Baton Rouge, Louisiana 70803, United States.
authors.forename: Molly A
authors.initials: MA
authors.lastname: Silvers
authors.forename: Gregory T
authors.initials: GT
authors.lastname: Robertson
authors.forename: Carol M
authors.initials: CM
authors.lastname: Taylor
authors.forename: Grover L
authors.initials: GL
authors.lastname: Waldrop
mesh_terms: D000103:Acetyl-CoA Carboxylase / Q000037:antagonists & inhibitors*; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D019878:Carboxyl and Carbamoyl Transferases; D004791:Enzyme Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D010080:Oxazoles / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: C000595651:2-amino-N,N-dibenzyloxazole-5-carboxamide; D000900:Anti-Bacterial Agents; D004791:Enzyme Inhibitors; D010080:Oxazoles; D019878:Carboxyl and Carbamoyl Transferases; D000103:Acetyl-CoA Carboxylase