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Medium optimization for enhanced production of recombinant lignin peroxidase in Pichia pastoris

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Abstract

Objectives

Different cultivation conditions and parameters were evaluated to improve the production and secretion of a recombinant Phanerochaete chrysosporium lipH8 gene in Komagataella phaffii (Pichia pastoris).

Results

The recombinant lipH8 gene with its native secretion signal was successfully cloned and expressed in Komagataella phaffii (Pichia pastoris) under the control of the alcohol oxidase 1 promoter (PAOX1). The results revealed that co-feeding with sorbitol and methanol increased rLiP secretion by 5.9-fold compared to the control conditions. The addition of 1 mM FeSO4 increased LiP activity a further 6.0-fold during the induction phase. Moreover, the combination of several optimal conditions and parameters yielded an extracellular rLiP activity of 20.05 U l−1, which is more than ten-fold higher relative to standard growth conditions (BMM10 medium, pH 6 and 30 °C).

Conclusion

Extracellular activity of a recombinant LiP expressed in P. pastoris increased more than ten-fold when co-feeding sorbitol and methanol as carbon sources, together with urea as nitrogen source, FeSO4 supplementation, lower pH and lower cultivation temperature.

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

Opinions expressed and conclusions arrived at are those of the authors and are not necessarily to be attributed to the NRF.

Funding

This work was supported by the National Research Foundation (NRF) linked to the Chair of Energy Research: Biofuels and Other Clean Alternative Fuels (Grant 86423 to WHvZ) and the Competitive Programme for Rated Researchers (Grant 118528 to MVB).

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by ODB. The first draft of the manuscript was written by ODB subsequent revisions done by MVB and WHvZ. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Willem H. van Zyl.

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The authors have no relevant financial or non-financial interests to disclose.

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Biko, O.D., Viljoen-Bloom, M. & van Zyl, W.H. Medium optimization for enhanced production of recombinant lignin peroxidase in Pichia pastoris. Biotechnol Lett 45, 105–113 (2023). https://doi.org/10.1007/s10529-022-03321-3

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  • DOI: https://doi.org/10.1007/s10529-022-03321-3

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