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Engineering and fermenter production of fungi GLA in Pichia pastoris GS115 using oil waste

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Abstract

γ-Linolenic acid (GLA) is an essential n-6 polyunsaturated fatty acid (PUFA) that has received considerable attention in human and animal feed. GLA is used in many nutritional and medicinal applications, such as the treatment of cancer, inflammatory disorders, and diabetes. Currently, plant seed is the primary dietary source of GLA that is not enough to utilize on an industrial scale. To generate a sustainable novel source of GLA, the gene of delta-6 desaturase, one of the essential enzymes in the GLA production pathway, was isolated from Mucor rouxii DSM1194 and expressed in P. pastoris GS115 by pPICZC vector. The recombinant yeast expressed the GLA up to 19.2% (72 mg/g) of total fatty acids. GLA production of recombinant yeast was studied in a fermenter by oil waste for 5 days, and results detected 6.3 g/l lipid, and 103 mg/g GLA was produced in 72 h. The present study may provide an opportunity to develop an alternative host for manufacturing GLA on an industrial scale.

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Acknowledgements

The authors would like to thank Dr. Rahman Emamzadeh, Dr. Maryam Fanaei, Zahra fanaei, Dr. Gholamreza Ghezelbash, and Dr. Hossein Ghanavati for their guidance.

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MMSFcarried out the experiment and supervised the project, HA helped supervise the project and wrote the manuscript.

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Correspondence to Maryam Sadat Mirbagheri Firoozabad.

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Communicated by Erko Stackebrandt.

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Mirbagheri Firoozabad, M.S., Akhbariyoon, H. Engineering and fermenter production of fungi GLA in Pichia pastoris GS115 using oil waste. Arch Microbiol 204, 635 (2022). https://doi.org/10.1007/s00203-022-03182-4

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  • DOI: https://doi.org/10.1007/s00203-022-03182-4

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