Ambuic acid inhibits the biosynthesis of cyclic peptide quormones in gram-positive bacteria

Jiro Nakayama, Yumi Uemura, Kenzo Nishiguchi, Norito Yoshimura, Yasuhiro Igarashi, Kenji Sonomoto

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)


Quorum sensing is a cell-density-dependent regulatory system in gram-positive bacteria and is often regulated by cyclic peptides called "quormones," which function as extracellular communication signals. With an aim to discover an antipathogenic agent targeting quorum sensing in gram-positive bacteria, we screened 153 samples of fungal butanol extracts with the guidance of the inhibition of quorum-sensing-mediated gelatinase production in Enterococcus faecalis. Following the screenings, we found that ambuic acid, a known secondary fungal metabolite, inhibited the quorum-sensing-mediated gelatinase production without influencing the growth of E. faecalis. We further demonstrated that ambuic acid targeted the biosynthesis of a cyclic peptide quormone called gelatinase biosynthesis-activating pheromone. Furthermore, ambuic acid also inhibited the biosynthesis of the cyclic peptide quormones of Staphylococcus aureus and Listeria innocua. These results suggest the potential use of ambuic acid as a lead compound of antipathogenic drugs that target the quorum-sensing-mediated virulence expression of gram-positive bacteria.

Original languageEnglish
Pages (from-to)580-586
Number of pages7
JournalAntimicrobial Agents and Chemotherapy
Issue number2
Publication statusPublished - Feb 2009

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases


Dive into the research topics of 'Ambuic acid inhibits the biosynthesis of cyclic peptide quormones in gram-positive bacteria'. Together they form a unique fingerprint.

Cite this