An integrated biophysical approach to discovering mechanisms of NDM-1 inhibition for several thiol-containing drugs
| Autor: | Ben A. Shurina, Caitlyn A. Thomas, Alexander Bergstrom, Stacey Lowery Bretz, Callie Miller, Kundi Yang, Lin-Cheng Ju, Zishuo Cheng, Sarah Fullington, Michael W. Crowder, David L. Tierney, Richard C. Page |
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| Rok vydání: | 2020 |
| Předmět: |
medicine.drug_class
Antibiotics 010402 general chemistry medicine.disease_cause 01 natural sciences Biochemistry beta-Lactamases Article Inorganic Chemistry medicine Ic50 values Humans Sulfhydryl Compounds chemistry.chemical_classification Molecular Structure biology 010405 organic chemistry Mechanism (biology) Pathogenic bacteria Isothermal titration calorimetry biology.organism_classification Enterobacteriaceae 0104 chemical sciences Molecular Docking Simulation Enzyme chemistry Thiol beta-Lactamase Inhibitors |
| Zdroj: | J Biol Inorg Chem |
| ISSN: | 1432-1327 0949-8257 |
| Popis: | Due to the rapid proliferation of antibiotic-resistant pathogenic bacteria, known as Carbapenem-Resistant Enterobacteriaceae (CRE), the efficacy of β-lactam antibiotics is threatened. β-Lactam antibiotics constitute over 50% of the available antibiotic arsenal. Recent efforts have been focused on developing inhibitors to these enzymes. In an effort to understand the mechanism of inhibition(s) of four FDA-approved thiol-containing drugs that were previously reported to be inhibitors of New Delhi Metallo-β-lactamase (NDM-1), various biochemical and spectroscopic techniques were used. Isothermal titration calorimetry demonstrated the binding affinity to NDM-1 corresponds to the reported IC(50) values of the inhibitors. Equilibrium dialyses and metal analyses demonstrated that all of these inhibitors formed ternary complexes with ZnZn-NDM-1. Spectroscopic studies on CoCo-NDM-1, revealed two distinct binding modes for the thiol containing compounds. Our findings validate the need to further investigate the mechanism of inhibition of MBL inhibitors. Further research to identify inhibition capabilities beyond reported IC(50) values is necessary for understanding the binding modes of these identified compounds and to provide the necessary foundation for developing clinically-relevant MBL inhibitors. |
| Databáze: | OpenAIRE |
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