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PMID:20693328
| Citation |
Lyell, NL, Dunn, AK, Bose, JL and Stabb, EV (2010) Bright mutants of Vibrio fischeri ES114 reveal conditions and regulators that control bioluminescence and expression of the lux operon. J. Bacteriol. 192:5103-14 |
|---|---|
| Abstract |
Vibrio fischeri ES114, an isolate from the Euprymna scolopes light organ, produces little bioluminescence in culture but is ∼1,000-fold brighter when colonizing the host. Cell-density-dependent regulation alone cannot explain this phenomenon, because cells within colonies on solid medium are much dimmer than symbiotic cells despite their similar cell densities. To better understand this low luminescence in culture, we screened ∼20,000 mini-Tn5 mutants of ES114 for increased luminescence and identified 28 independent "luminescence-up" mutants with insertions in 14 loci. Mutations affecting the Pst phosphate uptake system led to the discovery that luminescence is upregulated under low-phosphate conditions by PhoB, and we also found that ainS, which encodes an autoinducer synthase, mediates repression of luminescence during growth on plates. Other novel luminescence-up mutants had insertions in acnB, topA, tfoY, phoQ, guaB, and two specific tRNA genes. Two loci, hns and lonA, were previously described as repressors of bioluminescence in transgenic Escherichia coli carrying the light-generating lux genes, and mutations in arcA and arcB were consistent with our report that Arc represses lux. Our results reveal a complex regulatory web governing luminescence and show how certain environmental conditions are integrated into regulation of the pheromone-dependent lux system. |
| Links |
PubMed PMC2944500 Online version:10.1128/JB.00524-10 |
| Keywords |
Aliivibrio fischeri/genetics; Aliivibrio fischeri/metabolism; Bacterial Proteins/genetics; Bacterial Proteins/metabolism; DNA Transposable Elements/genetics; DNA Transposable Elements/physiology; Genetic Complementation Test; Guanine/metabolism; Luminescence; Magnesium/metabolism; Models, Biological; Mutation/genetics; Operon/genetics; Operon/physiology; Phosphates/metabolism |
| edit table |
Significance
Annotations
| Gene product | Qualifier | GO Term | Evidence Code | with/from | Aspect | Extension | Notes | Status |
|---|---|---|---|---|---|---|---|---|
| GO:0008218: bioluminescence |
ECO:0000315: |
P |
Table 1 |
complete | ||||
| GO:0050790: regulation of catalytic activity |
ECO:0000315: |
P |
figure 4 |
complete | ||||
|
involved_in |
GO:0008218: bioluminescence |
ECO:0000315: mutant phenotype evidence used in manual assertion |
P |
Seeded From UniProt |
complete | |||
| GO:0006355: regulation of transcription, DNA-dependent |
ECO:0000255: |
|
P |
Figure 1 |
complete | |||
| GO:0016740: transferase activity |
ECO:0000255: |
|
F |
figure 1 |
complete | |||
See also
References
See Help:References for how to manage references in GONUTS.
- ↑ Engebrecht, J & Silverman, M (1984) Identification of genes and gene products necessary for bacterial bioluminescence. Proc. Natl. Acad. Sci. U.S.A. 81 4154-8 PubMed GONUTS page
- ↑ Boylan, M et al. (1989) Lux C, D and E genes of the Vibrio fischeri luminescence operon code for the reductase, transferase, and synthetase enzymes involved in aldehyde biosynthesis. Photochem. Photobiol. 49 681-8 PubMed GONUTS page
