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. 1989 Oct;55(10):2601–2606. doi: 10.1128/aem.55.10.2601-2606.1989

Growth and luminescence of the bacterium Xenorhabdus luminescens from a human wound.

P Colepicolo 1, K W Cho 1, G O Poinar 1, J W Hastings 1
PMCID: PMC203130  PMID: 2604398

Abstract

Xenorhabdus luminescens, a newly isolated luminous bacterium collected from a human wound, was characterized. The effects of ionic strength, temperature, oxygen, and iron on growth and development of the bioluminescent system were studied. The bacteria grew and emitted light best at 33 degrees C in a medium with low salt, and the medium after growth of cells to a high density was found to have antibiotic activity. The emission spectrum peaked at 482 nm in vivo and at 490 nm in vitro. Both growth and the development of luminescence in X. luminescens required oxygen and iron. The isolated luciferase itself exhibited a temperature optimum at about 40 degrees C; after purification by affinity chromatography, it showed two bands (52 and 41 kilodaltons) on sodium dodecyl sulfate-polyacrylamide gel electrophoresis, indicative of an alpha and beta subunit structure. Reduced flavin mononucleotide (Km of 1.4 microM) and tetradecanal (Km of 2.1 microM) were the best substrates for the luciferase, and the first-order decay constant under these conditions at 37 degrees C was 0.79 s-1.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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