Discovery of bicyclic inhibitors against menaquinone biosynthesis

Seoung Ryoung Choi, Marilynn A. Larson, Steven H. Hinrichs, Amanda M. Bartling, Joel Frandsen, Prabagaran Narayanasamy

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Introduction: Menaquinone is used for transporting electrons and is essential for the aerobic and anaerobic respiratory systems of all pathogens and prokaryotes. Many Gram-positive bacteria use only menaquinone in the electron transport system. Thus, menaquinone biosynthesis is a potential target for the development of inhibitors against bacteria including drug-resistant pathogens. Results: After modeling, synthesis and in vitro testing, we determined that 7-methoxy-2-naphthol-based inhibitors targeted the MenA enzyme of the menaquinone biosynthesis pathway. The developmental compounds 1 and 2 were active against Mycobacterium tuberculosis and methicillin-resistant Staphylococcus aureus with a minimal inhibitory concentration of 3-5 μg/ml. Conclusion: Nontraditional bicyclic inhibitors, compounds 1 and 2 could serve as lead compounds for the development of an antimicrobial agent, with activities against M. tuberculosis and methicillin-resistant S. aureus.

Original languageEnglish (US)
Pages (from-to)11-16
Number of pages6
JournalFuture Medicinal Chemistry
Issue number1
StatePublished - Jan 2016

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology
  • Drug Discovery


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