Journal
FEMS MICROBIOLOGY LETTERS
Volume 304, Issue 2, Pages 131-139Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1574-6968.2009.01889.x
Keywords
quorum sensing; quorum quenching; acylhomoserine lactone; Cytophaga-Flavobacterium-Bacteroides
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Funding
- Conselleria de Innovacion e Industria, Xunta de Galicia, Spain [PGI-DIT06PXIB200045PR]
- Spanish Ministry of Science and Education
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Tenacibaculum maritimum (formerly Flexibacter maritimus) is a filamentous, biofilm-forming member of the Cytophaga-Flavobacterium-Bacteroides group (or Bacteroidetes), which causes the widely distributed marine fish disease tenacibaculosis. A search for N-acylhomoserine lactones (AHLs) quorum-sensing (QS) signals in the culture media of nine representative strains of this species using different biosensor strains revealed the presence of short-type AHL activity in all of them. N-butyryl-l-homoserine lactone (C4-HSL) was identified in T. maritimum NCIMB2154T by LC-MS. A degradation activity for long-acyl AHLs (C10-HSL) was subsequently demonstrated in T. maritimum NCIMB2154T. The acidification of the culture medium after degradation did not allow the recovery of C10-HSL, which indicates a possible acylase-type degradation activity. Even though the physiological processes under the control of AHL-mediated QS in T. maritimum need to be further characterized, this discovery extends the paradigm of AHL-mediated QS signalling beyond the Proteobacteria and reinforces its ecological significance.
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