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Developing Pantetheinase-Resistant Pantothenamide Antibacterials: Structural Modification Impacts on PanK Interaction and Mode of Action

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    Developing Pantetheinase-Resistant Pantothenamide Antibacterials: Structural Modification Impacts on PanK Interaction and Mode of Action
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    ACS Infectious Diseases

    Cite this: ACS Infect. Dis. 2018, 4, 5, 736–743
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    https://doi.org/10.1021/acsinfecdis.7b00240
    Published January 14, 2018
    Copyright © 2018 American Chemical Society
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    Abstract

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    Pantothenamides (PanAms) are analogues of pantothenate, the biosynthetic precursor of coenzyme A (CoA), and show potent antimicrobial activity against several bacteria and the malaria parasite in vitro. However, pantetheinase enzymes that normally degrade pantetheine in human serum also act on the PanAms, thereby reducing their potency. In this study, we designed analogues of the known antibacterial PanAm N-heptylpantothenamide (N7-Pan) to be resistant to pantetheinase by using three complementary structural modification strategies. We show that, while two of these are effective in imparting resistance, the introduced modifications have an impact on the analogues’ interaction with pantothenate kinase (PanK, the first CoA biosynthetic enzyme), which acts as a metabolic activator and/or target of the PanAms. This, in turn, directly affects their mode of action. Importantly, we discover that the phosphorylated version of N7-Pan shows pantetheinase resistance and antistaphylococcal activity, providing a lead for future studies in the ongoing search of PanAm analogues that show in vivo efficacy.

    Copyright © 2018 American Chemical Society

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsinfecdis.7b00240.

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    ACS Infectious Diseases

    Cite this: ACS Infect. Dis. 2018, 4, 5, 736–743
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsinfecdis.7b00240
    Published January 14, 2018
    Copyright © 2018 American Chemical Society
    Request reuse permissions

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