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Artificially Constructed Quorum-Sensing Circuits Are Used for Subtle Control of Bacterial Population Density

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  • Zhaoshou Wang
  • Xin Wu
  • Jianghai Peng
  • Yidan Hu
  • Baishan Fang
  • Shiyang Huang

Abstract

Vibrio fischeri is a typical quorum-sensing bacterium for which lux box, luxR, and luxI have been identified as the key elements involved in quorum sensing. To decode the quorum-sensing mechanism, an artificially constructed cell–cell communication system has been built. In brief, the system expresses several programmed cell-death BioBricks and quorum-sensing genes driven by the promoters lux pR and PlacO-1 in Escherichia coli cells. Their transformation and expression was confirmed by gel electrophoresis and sequencing. To evaluate its performance, viable cell numbers at various time periods were investigated. Our results showed that bacteria expressing killer proteins corresponding to ribosome binding site efficiency of 0.07, 0.3, 0.6, or 1.0 successfully sensed each other in a population-dependent manner and communicated with each other to subtly control their population density. This was also validated using a proposed simple mathematical model.

Suggested Citation

  • Zhaoshou Wang & Xin Wu & Jianghai Peng & Yidan Hu & Baishan Fang & Shiyang Huang, 2014. "Artificially Constructed Quorum-Sensing Circuits Are Used for Subtle Control of Bacterial Population Density," PLOS ONE, Public Library of Science, vol. 9(8), pages 1-7, August.
    • Handle: RePEc:plo:pone00:0104578
    DOI: 10.1371/journal.pone.0104578
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    References listed on IDEAS

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    1. Eric J. Steen & Yisheng Kang & Gregory Bokinsky & Zhihao Hu & Andreas Schirmer & Amy McClure & Stephen B. del Cardayre & Jay D. Keasling, 2010. "Microbial production of fatty-acid-derived fuels and chemicals from plant biomass," Nature, Nature, vol. 463(7280), pages 559-562, January.
    2. Lingchong You & Robert Sidney Cox & Ron Weiss & Frances H. Arnold, 2004. "Programmed population control by cell–cell communication and regulated killing," Nature, Nature, vol. 428(6985), pages 868-871, April.
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