Quorum-sensing antagonist (5Z)-4-bromo-5-(bromomethylene)-3-butyl-2(5H)- furanone influences siderophore biosynthesis in Pseudomonas putida and Pseudomonas aeruginosa

Dacheng Ren, Rongjun Zuo, Thomas K. Wood

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


Siderophore synthesis of Pseudomonas putida F1 was found to be regulated by quorum sensing since normalized siderophore production (per cell) increased 4.2-fold with cell density after the cells entered middle exponential phase; similarly, normalized siderophore concentrations in Pseudomonas aeruginosa JB2 increased 28-fold, and a 5.5-fold increase was seen for P. aeruginosa PAO1. Further evidence of the link between quorum sensing and siderophore synthesis of P. putida F1 was that the quorum-sensing-disrupter (5Z)-4-bromo-5- (bromomethylene)-3-butyl-2(5H)-furanone (furanone) from the marine red alga Delisea pulchra was found to inhibit the formation of the siderophore produced by P. putida F1 in a concentration-dependent manner, with 57% siderophore synthesis repressed by 100 μg/ml furanone. In contrast, this furanone did not affect the siderophore synthesis of Burkholderia cepacia G4 at 20-40 μg/ml, and stimulated siderophore synthesis of P. aeruginosa JB2 2.5- to 3.7-fold at 20-100 μg/ml. Similarly, 100 μg/ml furanone stimulated siderophore synthesis in P. aeruginosa PAO1 about 3.5-fold. The furanone appears to interact with the quorum-sensing machinery of P. aeruginosa PAO1 since it stimulates less siderophore synthesis in the P. aeruginosa qscR quorum-sensing mutant (QscR is a negative regulator of LasI, an acylated homoserine lactone synthase).

Original languageEnglish (US)
Pages (from-to)689-695
Number of pages7
JournalApplied Microbiology and Biotechnology
Issue number6
StatePublished - Mar 2005
Externally publishedYes

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology


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