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Luminescence control in the marine bacterium Vibrio fischeri: An analysis of the dynamics of lux regulation

Författare

Summary, in English

A mathematical model has been developed based on the fundamental properties of the control system formed by the lux genes and their products in Vibrio fischeri. The model Clearly demonstrates how the components of this system work together to create two, stable metabolic states corresponding to the expression of the luminescent and non-luminescent phenotypes. It is demonstrated how the cell can "switch" between these steady states due to changes in parameters describing metabolic processes and the extracellular concentration of the signal molecule N-3-oxohexanoyl-L-homoserine lactone. Ln addition, it is shown how these parameters influence how sensitive the switch mechanism is to cellular LuxR and N-3-oxohexanoyl-L-homoserine lactone and complex concentration. While these properties could lead to the collective phenomenon known as quorum sensing, the model also predicts that under certain metabolic circumstances, basal expression of the lux genes could cause a cell to luminesce in the absence of extracellular signal molecule. Finally, the model developed in this study provides a basis for analysing the impact of other levels of control upon lux regulation. (C) 2000 Academic Press.

Publiceringsår

2000

Språk

Engelska

Sidor

1127-1137

Publikation/Tidskrift/Serie

Journal of Molecular Biology

Volym

296

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Ecology

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1089-8638