Characterization of autoinducer 2 signal in Eikenella corrodens and its role in biofilm formation.
J Biosci Bioeng
; 102(2): 110-7, 2006 Aug.
Article
en En
| MEDLINE
| ID: mdl-17027872
Quorum sensing (QS) is a process by which bacteria communicate using secreted chemical signaling molecules called autoinducers (AIs). By this process, many bacterial species modulate the expression of a wide variety of physiological functions in response to changes in population density. In this study, the periodontal pathogen Eikenella corrodens was observed to secrete type 2 signaling molecules. An ortholog of luxS, the gene required for AI-2 synthesis in Vibrio harveyi, was isolated from the E. corrodens genome. A V. harveyi bioassay showed luxS functionality in E. corrodens and the ability of luxS to complement the luxS-negative phenotype of Escherichia coli DH5alpha. AI activity was detected in the supernatant, and the maximum expression of AI-2 was observed during the late exponential phase. To determine the potential role of luxS in the colonization processes, an E. corrodens luxS mutant was constructed and tested for its capacity to form an in vitro biofilm on a polystyrene surface. The biofilm forming efficiency of the luxS mutant was approximately 1.3-fold greater than that of the wild type. These data suggest that a LuxS-dependent signal plays a role in the biofilm formation by E. corrodens.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Bacterias
/
Biotecnología
/
Eikenella corrodens
/
Biopelículas
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Biosci Bioeng
Asunto de la revista:
ENGENHARIA BIOMEDICA
/
MICROBIOLOGIA
Año:
2006
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Japón