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Recycling selectable markers via Cre/loxP system for constructing Komagataella phaffii strains co-expressing multiple proteins

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Abstract

Objective

A convenient strategy was developed to recycle selectable markers using Cre/loxP system for constructing Komagataella phaffii strains co-expressing multiple proteins.

Results

A plasmid in this strategy was generated from pPICZαA with integration of lox71-Sh ble-lox66. Firstly, the plasmid was inserted with one target protein gene and then transformed into K. phaffii KM71. Secondly, the auxiliary plasmid pPICZαA/cre/his4 containing CRE recombinase gene was further chromosomally inserted to Sh ble gene therein. Finally, methanol induction was conducted to produce CRE for Cre/loxP-mediated recombination, and consequently, the sequence between lox71 and lox66 was deleted, leading to recycling of ZeoR and His− markers. Then the resulted strain expressing the one target protein was used as the host to which another target protein gene could be inserted by the same procedures.

Conclusions

With easy manipulation, the method was effective in recycling of the selectable markers, and consequently two protein genes were sequential integrated chromosomally and successfully co-expressed in the yeast.

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Funding

This study was funded by the National Natural Science Foundation of China (Grant No. 32260012) and by Guizhou Provincial Science and Technology Foundation (Grant No. [2020]1Y148).

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Authors and Affiliations

  1. Analytical and Testing Center, Guizhou Institute of Technology, Guiyang, 550000, China

    Weixian Wang

  2. College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang, 550000, China

    Minghai Han, Guofei Zhu, Xiaohui Liu, Tianming Zhao, Xiaoyan Ma, Xun Gong & Cunbin Xu

Authors
  1. Weixian Wang
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  2. Minghai Han
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  3. Guofei Zhu
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  4. Xiaohui Liu
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  5. Tianming Zhao
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  6. Xiaoyan Ma
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  7. Xun Gong
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  8. Cunbin Xu
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Contributions

All authors contributed to the experimental design, hands on work, discussions, and commented on the manuscript.

Corresponding author

Correspondence to Minghai Han.

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Wang, W., Han, M., Zhu, G. et al. Recycling selectable markers via Cre/loxP system for constructing Komagataella phaffii strains co-expressing multiple proteins. Biotechnol Lett 46, 399–407 (2024). https://doi.org/10.1007/s10529-024-03466-3

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  • DOI: https://doi.org/10.1007/s10529-024-03466-3

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