Abstract
The enzymes for luminescence in Vibrio fischeri are induced by the accumulation of a species-specific metabolite (autoinducer) in the culture medium. Tritium-labeled autoinducer was used to study the mechanism of autoinduction. When 3H-autoinducer was added to suspensions of V. fischeri or Escherichia coli, cellular concentrations equaled external concentrations. For V. fischeri, equilibration of 3H-autoinducer was rapid (within 20 s), and greater than 90% of the cellular tritium remained in unmodified autoinducer. When V. fischeri or E. coli cells containing 3H-autoinducer were transferred to autoinducer-free buffer, 85 to 99.5% of the radiotracer escaped from the cells, depending on the strain. Concentrations of autoinducer as low as 10 nM, which is equivalent to 1 or 2 molecules per cell, were sufficient for induction, and the maximal response to autoinducer occurred at about 200 nM. If external autoinducer concentrations were decreased to below 10 nM after induction had commenced, the induction response did not continue. Based on this study, a model for autoinduction is described wherein autoinducer association with cells is by simple diffusion and binding of autoinducer to its active site is reversible.
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Selected References
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- Baumann P., Baumann L., Mandel M. Taxonomy of marine bacteria: the genus Beneckea. J Bacteriol. 1971 Jul;107(1):268–294. doi: 10.1128/jb.107.1.268-294.1971. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Eberhard A., Burlingame A. L., Eberhard C., Kenyon G. L., Nealson K. H., Oppenheimer N. J. Structural identification of autoinducer of Photobacterium fischeri luciferase. Biochemistry. 1981 Apr 28;20(9):2444–2449. doi: 10.1021/bi00512a013. [DOI] [PubMed] [Google Scholar]
- Eberhard A. Inhibition and activation of bacterial luciferase synthesis. J Bacteriol. 1972 Mar;109(3):1101–1105. doi: 10.1128/jb.109.3.1101-1105.1972. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Engebrecht J., Nealson K., Silverman M. Bacterial bioluminescence: isolation and genetic analysis of functions from Vibrio fischeri. Cell. 1983 Mar;32(3):773–781. doi: 10.1016/0092-8674(83)90063-6. [DOI] [PubMed] [Google Scholar]
- Engebrecht J., Silverman M. Identification of genes and gene products necessary for bacterial bioluminescence. Proc Natl Acad Sci U S A. 1984 Jul;81(13):4154–4158. doi: 10.1073/pnas.81.13.4154. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hobbie J. E., Daley R. J., Jasper S. Use of nuclepore filters for counting bacteria by fluorescence microscopy. Appl Environ Microbiol. 1977 May;33(5):1225–1228. doi: 10.1128/aem.33.5.1225-1228.1977. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nealson K. H. Autoinduction of bacterial luciferase. Occurrence, mechanism and significance. Arch Microbiol. 1977 Feb 4;112(1):73–79. doi: 10.1007/BF00446657. [DOI] [PubMed] [Google Scholar]
- Nealson K. H., Hastings J. W. Bacterial bioluminescence: its control and ecological significance. Microbiol Rev. 1979 Dec;43(4):496–518. doi: 10.1128/mr.43.4.496-518.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nealson K. H., Platt T., Hastings J. W. Cellular control of the synthesis and activity of the bacterial luminescent system. J Bacteriol. 1970 Oct;104(1):313–322. doi: 10.1128/jb.104.1.313-322.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rottenberg H. The measurement of membrane potential and deltapH in cells, organelles, and vesicles. Methods Enzymol. 1979;55:547–569. doi: 10.1016/0076-6879(79)55066-6. [DOI] [PubMed] [Google Scholar]
- Ruby E. G., Greenberg E. P., Hastings J. W. Planktonic marine luminous bacteria: species distribution in the water column. Appl Environ Microbiol. 1980 Feb;39(2):302–306. doi: 10.1128/aem.39.2.302-306.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ruby E. G., Nealson K. H. Symbiotic association of Photobacterium fischeri with the marine luminous fish Monocentris japonica; a model of symbiosis based on bacterial studies. Biol Bull. 1976 Dec;151(3):574–586. doi: 10.2307/1540507. [DOI] [PubMed] [Google Scholar]