Cloacaenodin, an Antimicrobial Lasso Peptide with Activity against Enterobacter

Drew V. Carson, Monica Patiño, Hader E. Elashal, Alexis Jaramillo Cartagena, Yi Zhang, Megan E. Whitley, Larry So, Angelo K. Kayser-Browne, Ashlee M. Earl, Roby P. Bhattacharyya, A. James Link

Research output: Contribution to journalArticlepeer-review


Using genome mining and heterologous expression, we report the discovery and production of a new antimicrobial lasso peptide from species related to the Enterobacter cloacae complex. Using NMR and mass spectrometric analysis, we show that this lasso peptide, named cloacaenodin, employs a threaded lasso fold which imparts proteolytic resistance that its unthreaded counterpart lacks. Cloacaenodin has selective, low micromolar, antimicrobial activity against species related to the E. cloacae complex, including species implicated in nosocomial infections and against clinical isolates of carbapenem-resistant Enterobacterales. We further used site-directed mutagenesis to probe the importance of specific residues to the peptide's biosynthesis, stability, and bioactivity.

Original languageEnglish (US)
JournalACS Infectious Diseases
StateAccepted/In press - 2022

All Science Journal Classification (ASJC) codes

  • Infectious Diseases


  • Enterobacter cloacae
  • RiPPs
  • antimicrobial lasso peptide
  • carbapenem-resistant Enterobacterales
  • cloacaenodin
  • genome mining


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