Download MendeleyRational Design of Benzobisheterocycle Metallo-beta-Lactamase Inhibitors: A Tricyclic Scaffold Enhances Potency against Target Enzymes.
Villamil, V., Rossi, M.A., Mojica, M.F., Hinchliffe, P., Martinez, V., Castillo, V., Saiz, C., Banchio, C., Macias, M.A., Spencer, J., Bonomo, R.A., Vila, A., Moreno, D.M., Mahler, G.(2024) J Med Chem 67: 3795-3812
- PubMed: 38373290
- DOI: https://doi.org/10.1021/acs.jmedchem.3c02209
- Primary Citation of Related Structures:
8R5T, 8R5U - PubMed Abstract:
Antimicrobial resistance is a global public health threat. Metallo-β-lactamases (MBLs) inactivate β-lactam antibiotics, including carbapenems, are disseminating among Gram-negative bacteria, and lack clinically useful inhibitors. The evolving bisthiazolidine (BTZ) scaffold inhibits all three MBL subclasses (B1-B3). We report design, synthesis, and evaluation of BTZ analogues. Structure-activity relationships identified the BTZ thiol as essential, while carboxylate is replaceable, with its removal enhancing potency by facilitating hydrophobic interactions within the MBL active site. While the introduction of a flexible aromatic ring is neutral or detrimental for inhibition, a rigid (fused) ring generated nM benzobisheterocycle (BBH) inhibitors that potentiated carbapenems against MBL-producing strains. Crystallography of BBH:MBL complexes identified hydrophobic interactions as the basis of potency toward B1 MBLs. These data underscore BTZs as versatile, potent broad-spectrum MBL inhibitors (with activity extending to enzymes refractory to other inhibitors) and provide a rational approach to further improve the tricyclic BBH scaffold.
Organizational Affiliation:
Laboratorio de Química Farmacéutica, Departamento de Química Orgánica, Facultad de Química, Universidad de la República (UdelaR), Avda. General Flores, 2124 Montevideo, Uruguay.
