Dataset Information

Synthesis and Antimicrobial Evaluation of ?-Borono Phosphonate Compounds in Escherichia coli and Mycobacterium smegmatis.

ABSTRACT: Drug resistance in bacteria is a serious threat, and drugs with novel modes of action are constantly needed. Fosmidomycin is a naturally occurring antibiotic that inhibits the nonmevalonate pathway via inhibition of the enzyme 1-deoxylulose-5-phosphate reductoisomerase (DXR). This work is the first report in which a boronic acid is evaluated as an isostere of the retrohydroxamate moiety of fosmidomycin. We report the novel synthesis of a ?-borono phosphonate analog of fosmidomycin and its corresponding prodrugs. We evaluate the inhibition of DXR and the antimicrobial activity of ?-borono phosphonate compounds against Escherichia coli wild type, E. coli ?glycerol-3-phosphate transporter, and Mycobacterium smegmatis. Despite its structural similarities, the ?-borono phosphonate compound shows antimicrobial activity against E. coli with a mechanism of action that is different from fosmidomycin. This was proven with an underutilized method for studying in vitro inhibition of the MEP pathway in E. coli via isopentenyl pyrophosphate chemical rescue. These results indicate that these compounds may serve as a promising scaffold for developing a new class of antimicrobial agents.

SUBMITTER: Mancini G

PROVIDER: S-EPMC6740193 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature

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Synthesis and Antimicrobial Evaluation of γ-Borono Phosphonate Compounds in <i>Escherichia coli</i> and <i>Mycobacterium smegmatis</i>.

Mancini Giulia G Bouda Maria M Gamrat James M JM Tomsho John W JW

ACS omega 20190823 11

Drug resistance in bacteria is a serious threat, and drugs with novel modes of action are constantly needed. Fosmidomycin is a naturally occurring antibiotic that inhibits the nonmevalonate pathway via inhibition of the enzyme 1-deoxylulose-5-phosphate reductoisomerase (DXR). This work is the first report in which a boronic acid is evaluated as an isostere of the retrohydroxamate moiety of fosmidomycin. We report the novel synthesis of a γ-borono phosphonate analog of fosmidomycin and its corres ...[more]

PMID: 31528809

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Project description:A series of structome analyses, that is, quantitative and three-dimensional structural analysis of a whole cell at the electron microscopic level, have already been achieved individually in Exophiala dermatitidis, Saccharomyces cerevisiae, Mycobacterium tuberculosis, Myojin spiral bacteria, and Escherichia coli. In these analyses, sample cells were processed through cryo-fixation and rapid freeze-substitution, resulting in the exquisite preservation of ultrastructures on the serial ultrathin sections examined by transmission electron microscopy. In this paper, structome analysis of non pathogenic Mycolicibacterium smegmatis, basonym Mycobacterium smegmatis, was performed. As M. smegmatis has often been used in molecular biological experiments and experimental tuberculosis as a substitute of highly pathogenic M. tuberculosis, it has been a task to compare two species in the same genus, Mycobacterium, by structome analysis. Seven M. smegmatis cells cut into serial ultrathin sections, and, totally, 220 serial ultrathin sections were examined by transmission electron microscopy. Cell profiles were measured, including cell length, diameter of cell and cytoplasm, surface area of outer membrane and plasma membrane, volume of whole cell, periplasm, and cytoplasm, and total ribosome number and density per 0.1 fl cytoplasm. These data are based on direct measurement and enumeration of exquisitely preserved single cell structures in the transmission electron microscopy images, and are not based on the calculation or assumptions from biochemical or molecular biological indirect data. All measurements in M. smegmatis, except cell length, are significantly higher than those of M. tuberculosis. In addition, these data may explain the more rapid growth of M. smegmatis than M. tuberculosis and contribute to the understanding of their structural properties, which are substantially different from M. tuberculosis, relating to the expression of antigenicity, acid-fastness, and the mechanism of drug resistance in relation to the ratio of the targets to the corresponding drugs. In addition, data obtained from cryo-transmission electron microscopy examination were used to support the validity of structome analysis. Finally, our data strongly support the most recent establishment of the novel genus Mycolicibacterium, into which basonym Mycobacterium smegmatis has been classified.

Dataset Information

Synthesis and Antimicrobial Evaluation of ?-Borono Phosphonate Compounds in Escherichia coli and Mycobacterium smegmatis.

Publications

Synthesis and Antimicrobial Evaluation of γ-Borono Phosphonate Compounds in <i>Escherichia coli</i> and <i>Mycobacterium smegmatis</i>.

Similar Datasets

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