The papain inhibitor (SPI) of Streptomyces mobaraensis inhibits bacterial cysteine proteases and is an antagonist of bacterial growth

Stephan Zindel, Wendy E Kaman, Sabrina Fröls, Felicitas Pfeifer, Anna Peters, John P Hays, Hans-Lothar Fuchsbauer

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

A novel papain inhibitory protein (SPI) from Streptomyces mobaraensis was studied to measure its inhibitory effect on bacterial cysteine protease activity (Staphylococcus aureus SspB) and culture supernatants (Porphyromonas gingivalis, Bacillus anthracis). Further, growth of Bacillus anthracis, Staphylococcus aureus, Pseudomonas aeruginosa, and Vibrio cholerae was completely inhibited by 10 μM SPI. At this concentration of SPI, no cytotoxicity was observed. We conclude that SPI inhibits bacterial virulence factors and has the potential to become a novel therapeutic treatment against a range of unrelated pathogenic bacteria.

Original languageEnglish
Pages (from-to)3388-91
Number of pages4
JournalAntimicrobial agents and chemotherapy
Volume57
Issue number7
DOIs
Publication statusPublished - Jul 2013

Keywords

  • Bacillus anthracis/drug effects
  • Bacterial Proteins/metabolism
  • Cysteine Proteases/metabolism
  • Cysteine Proteinase Inhibitors/pharmacology
  • Papain/antagonists & inhibitors
  • Porphyromonas gingivalis/drug effects
  • Pseudomonas aeruginosa/drug effects
  • Staphylococcus aureus/drug effects
  • Streptomyces/chemistry
  • Vibrio cholerae/drug effects

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