Model-driven discovery of synergistic inhibitors against E. coli and S. enterica serovar Typhimurium targeting a novel synthetic lethal pair, aldA and prpC

Ramy K. Aziz, Valerie L. Khaw, Jonathan M. Monk, Elizabeth Brunk, Robert Lewis, Suh I. Loh, Arti Mishra, Amrita A. Nagle, Chitkala Satyanarayana, Saravanakumar Dhakshinamoorthy, Michele Luche, Douglas B. Kitchen, Kathleen A. Andrews, Bernhard Ø Palsson, Pep Charusanti

Research output: Contribution to journalJournal articleResearchpeer-review

410 Downloads (Pure)

Abstract

Mathematical models of biochemical networks form a cornerstone of bacterial systems biology. Inconsistencies between simulation output and experimental data point to gaps in knowledge about the fundamental biology of the organism. One such inconsistency centers on the gene aldA in Escherichia coli: it is essential in a computational model of E. coli metabolism, but experimentally it is not. Here, we reconcile this disparity by providing evidence that aldA and prpC form a synthetic lethal pair, as the double knockout could only be created through complementation with a plasmid-borne copy of aldA. Moreover, virtual and biological screening against the two proteins led to a set of compounds that inhibited the growth of E. coli and Salmonella enterica serovar Typhimurium synergistically at 100-200 μM individual concentrations. These results highlight the power of metabolic models to drive basic biological discovery and their potential use to discover new combination antibiotics.
Original languageEnglish
Article number958
JournalFrontiers in Microbiology
Volume6
Number of pages10
ISSN1664-302X
DOIs
Publication statusPublished - 2015

Bibliographical note

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

Keywords

  • Antibiotic development
  • Bacterial metabolism
  • Drug discovery
  • Metabolic reconstruction
  • Model-based drug target discovery
  • Pathway gap filling
  • Synthetic lethality
  • Systems biology

Fingerprint

Dive into the research topics of 'Model-driven discovery of synergistic inhibitors against E. coli and S. enterica serovar Typhimurium targeting a novel synthetic lethal pair, aldA and prpC'. Together they form a unique fingerprint.

Cite this