Toward the rational design of macrolide antibiotics to combat resistance

Pavlova, Anna; Parks, Jerry M.; Oyelere, Adegboyega K.; Gumbart, James C.

doi:10.1111/cbdd.13004

Title: Toward the rational design of macrolide antibiotics to combat resistance

Journal Article · Mon Apr 17 00:00:00 EDT 2017 · Chemical Biology & Drug Design

DOI:https://doi.org/10.1111/cbdd.13004· OSTI ID:1376364

Pavlova, Anna ^[1]; Parks, Jerry M. ^[2]; Oyelere, Adegboyega K. ^[1]; Gumbart, James C. ^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Here, macrolides, one of the most prescribed classes of antibiotics, bind in the bacterial ribosome's polypeptide exit tunnel and inhibit translation. However, mutations and other ribosomal modifications, especially to the base A2058 of the 23S rRNA, have led to a growing resistance problem. Here, we have used molecular dynamics simulations to study the macrolides erythromycin and azithromycin in wild-type, A2058G-mutated, and singly or doubly A2058-methylated Escherichia coli ribosomes. We find that the ribosomal modifications result in less favorable interactions between the base 2058 and the desosamine sugar of the macrolides, as well as greater displacement of the macrolides from their crystal structure position, illuminating the causes of resistance. We have also examined four azithromycin derivatives containing aromatic indole-analog moieties, which were previously designed based on simulations of the stalling peptide SecM in the ribosome. Surprisingly, we found that the studied moieties could adopt very different geometries when interacting with a key base in the tunnel, A751, possibly explaining their distinct activities. Based on our simulations, we propose modifications to the indole-analog moieties that should increase their interactions with A751 and, consequently, enhance the potency of future azithromycin derivatives.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1376364

Journal Information:: Chemical Biology & Drug Design, Vol. 90, Issue 5; ISSN 1747-0277

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Title: Toward the rational design of macrolide antibiotics to combat resistance

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