Volume 18 Issue 2
Apr.  2022
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XIAO Yan, WANG Lu, WANG Sen, CONG Peihu, LU Dong, FENG Yingang, CUI Qiu, SONG Xiaojin. Mutation and selection of high squalene production yeast Pseudozyma sp. induced by carbon-ions beam irradiation and its electrotransfor-mation[J]. South China Fisheries Science, 2022, 18(2): 98-104. DOI: 10.12131/20210294
Citation: XIAO Yan, WANG Lu, WANG Sen, CONG Peihu, LU Dong, FENG Yingang, CUI Qiu, SONG Xiaojin. Mutation and selection of high squalene production yeast Pseudozyma sp. induced by carbon-ions beam irradiation and its electrotransfor-mation[J]. South China Fisheries Science, 2022, 18(2): 98-104. DOI: 10.12131/20210294
shu

Mutation and selection of high squalene production yeast Pseudozyma sp. induced by carbon-ions beam irradiation and its electrotransfor-mation

  • 1.

    Key Laboratory of Biofuels, Chinese Academy of Sciences/Shandong Provincial Key Laboratory of Synthetic Biology/Shandong Energy Institute/Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China

  • 2.

    SDU-ANU Joint Science College, Shandong University, Weihai 264209, China

  • 3.

    Shandong Science and Technology Service Development and Promotion Center, Jinan 250101, China

  • 4.

    Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

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  • Received Date: October 09, 2021
  • Revised Date: January 26, 2022
  • Accepted Date: January 27, 2022
  • Available Online: February 13, 2022
    Graphical Abstract
    • Abstract
  • In order to improve the yield of squalene, using Pseudozyma sp. SD301 as the starting strain, we selected the mutant strain with high squalene yield by carbon-ions (12C6+) beam irradiation technology, and optimized the electrotransformation conditions of the mutant strain. We used 100 μmol·L−1 H2O2 as the screening pressure. When the carbon heavy ion beam irradiation dose was 120 Gy, the mutant PS120 was obtained with higher squalene yield than the original strain. After 3 days of culture, the squalene yield of the mutant reached 1.33 g·L−1 and the squalene mass reached 41.31 mg·g−1. The green fluorescent protein EGFP was used as the characterization marker to optimize the electrotransformation conditions of PS120. The results of enzyme digestion, electrophoresis and sequencing show that the gene encoding EGFP could be successfully transferred into PS120 cells under 900 V voltage. The high-level expression of EGFP protein in PS120 cells was further confirmed by laser confocal microscope.
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