Functional and structural basis of E. coli enolase inhibition by SF2312: A mimic of the carbanion intermediate

College

College of Science

Department/Unit

Chemistry

Document Type

Article

Source Title

Scientific Reports

Volume

9

First Page

1

Last Page

14

Publication Date

2019

Abstract

Many years ago, the natural secondary metabolite SF2312, produced by the actinomycete Micromonospora, was reported to display broad spectrum antibacterial properties against both Gram-positive and Gram-negative bacteria. Recent studies have revealed that SF2312, a natural phosphonic acid, functions as a potent inhibitor of human enolase. The mechanism of SF2312 inhibition of bacterial enolase and its role in bacterial growth and reproduction, however, have remained elusive. In this work, we detail a structural analysis of E. coli enolase bound to both SF2312 and its oxidized imide-form. Our studies support a model in which SF2312 acts as an analog of a high energy intermediate formed during the catalytic process. Biochemical, biophysical, computational and kinetic characterization of these compounds confirm that altering features characteristic of a putative carbanion (enolate) intermediate significantly reduces the potency of enzyme inhibition. When SF2312 is combined with fosfomycin in the presence of glucose-6 phosphate, significant synergy is observed. This suggests the two agents could be used as a potent combination, targeting distinct cellular mechanism for the treatment of bacterial infections. Together, our studies rationalize the structure-activity relationships for these phosphonates and validate enolase as a promising target for antibiotic discovery.

html

Digitial Object Identifier (DOI)

https://doi.org/10.1038/s41598-019-53301-3

Disciplines

Chemistry

Keywords

Escherichia coli; Enolase; Metabolites; Carbanions

Upload File

wf_no

This document is currently not available here.

Share

COinS