Difference between revisions of "Team:ZJUT-China/Description"

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Nowadays intracellular products take up a great share o the market, and with the increase of people’s need, they will create a growing market value. But the way to extra the target products from inside of the cells has always been a problem. Chemical disruption ways will mix in new impurities which need to be separated later, and physical ways may bring high temperature leading to unstable products so they need chillers. Considering of  this problem, we came up with an idea that if cells could self-lyse under the  control of some convenient conditions provided by environment, for example, the light because light serves as an excellent trigger to achieve precise control on synthetic systems as it can regulate in wavelength, timing, intensity and location. Based on this thought, the project showed in the video just came out. In particular, we focused on Escherichia coli in the project because it’s common used and easy to operate. The project may fit other bacteria in further study.
 
Nowadays intracellular products take up a great share o the market, and with the increase of people’s need, they will create a growing market value. But the way to extra the target products from inside of the cells has always been a problem. Chemical disruption ways will mix in new impurities which need to be separated later, and physical ways may bring high temperature leading to unstable products so they need chillers. Considering of  this problem, we came up with an idea that if cells could self-lyse under the  control of some convenient conditions provided by environment, for example, the light because light serves as an excellent trigger to achieve precise control on synthetic systems as it can regulate in wavelength, timing, intensity and location. Based on this thought, the project showed in the video just came out. In particular, we focused on Escherichia coli in the project because it’s common used and easy to operate. The project may fit other bacteria in further study.
 
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<li>Why do we chose to work on this genetically engineered E.coli at first?</li>
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Separation of metabolites from cells and contamination by bacteriophage are two big challenges in the fermentation industry. Separation of metabolites needs to collect cells with centrifugation or take a long time waiting for self-precipitation. Contamination by bacteriophage is often resulted from incomplete sterilization and/or the metabolites producing bacteria escaping to the nearby environment. To address these two questions, we students came out of an idea that if we can increase the efficiency of self-precipitation by introducing a self-flocculation gene and increase the sterilization effect by inducing suicide with a cell lysis gene. We think that introducing the light-induced switch systems will largely facilitate the control of the expression of the suicide and self-flocculation genes and make it more applicable to the fermentation industry.
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<li>References and sources we used in our research.</li>
 
<li>References and sources we used in our research.</li>
 
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Revision as of 21:53, 31 October 2017

ZJUT-China

Description

Here is a clear and concise introduction of our project. It only provides the most essential information and will be re-edit later.

    Nowadays intracellular products take up a great share o the market, and with the increase of people’s need, they will create a growing market value. But the way to extra the target products from inside of the cells has always been a problem. Chemical disruption ways will mix in new impurities which need to be separated later, and physical ways may bring high temperature leading to unstable products so they need chillers. Considering of this problem, we came up with an idea that if cells could self-lyse under the control of some convenient conditions provided by environment, for example, the light because light serves as an excellent trigger to achieve precise control on synthetic systems as it can regulate in wavelength, timing, intensity and location. Based on this thought, the project showed in the video just came out. In particular, we focused on Escherichia coli in the project because it’s common used and easy to operate. The project may fit other bacteria in further study.

  • References and sources we used in our research.
  • ①Jeffrey J. Tabor,Anselm Levskaya,and Christopher A. Voigt. Multichromatic control of gene expression in Escherichia coli.J Mol Biol. 2011 January 14; 405(2): 315–324.

    ②Wu H, Wang Y, Wang Y, Cao X, Wu Y, Meng Z, Su Q, Wang Z, Yang S, Xu W, Liu S, Cheng P, Wu J, Khan MR, He L, Ma G.Quantitatively relating gene expression to light intensity via the serial connection of blue light sensor and CRISPRi.ACS Synth Biol. 2014 Dec 19;3(12):979-82. doi: 10.1021/sb500059x.

    ③Yoshihiro Ojima, Minh Hong Nguyen, Reiki Yajima, and Masahito Taya.Flocculation of Escherichia coli Cells in Association with Enhanced Production of Outer Membrane Vesicles. Appl Environ Microbiol. 2015 Sep 1;81(17):5900-6. doi: 10.1128/AEM.01011-15. Epub 2015 Jun 19.

    ④Laura Grande, Valeria Michelacci, Rosangela Tozzoli, Paola Ranieri, Antonella Maugliani, Alfredo Caprioli, and Stefano Morabito. Whole genome sequence comparison of vtx2-converting phages from Enteroaggregative Haemorrhagic Escherichia coli strains. BMC Genomics. 2014; 15(1): 574.Published online 2014 Jul 8. doi:  10.1186/1471-2164-15-574.

  • Use illustrations and other visual resources to explain your project.
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References

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Inspiration

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