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Enhancing pIFN-α Production and Process Stability in Fed-Batch Culture of Pichia pastoris by Controlling the Methanol Concentration and Monitoring the Responses of OUR/DO Levels

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Abstract

Effective expression of porcine interferon-α (pIFN-α) with recombinant Pichia pastoris was conducted in a bench-scale fermentor using an in situ methanol electrode-based feeding process with the control level of methanol concentration linearly increased to 10 g l−1 for the first 20 h and maintained at 10 g l−1 for the rest of expression phase. With this two-stage control process, the highest pIFN-α concentration reached a level of 1.81 g l−1, which was 1.5-fold of that in the previous constant 10 g l−1 induction experiments. There is an improvement of the pIFN-α productivity from more distribution of carbon flux to protein expression. The pIFN-α expression stability could be further enhanced by a simple on-line fault diagnosis method for methanol overfeeding based on oxygen uptake rate changing patterns. By implementing corrective action of feeding glycerol after fault detection, the production yield increased to twice the amount it would have been without the diagnosis.

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Acknowledgments

This study was sponsored by the Key Agricultural Technology Program of Shanghai Science & Technology Committee (#073919108) and Major State Basic Research Development Program (#2007CB714303) of China, as well as program of Introducing Talents of Discipline to Universities (111-2-06).

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Authors and Affiliations

  1. Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China

    Min-Jie Gao, Xiao-Bei Zhan, Zhi-Yong Zheng, Jian-Rong Wu, Zhong-Ping Shi & Chi-Chung Lin

  2. Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Animal Husbandry and Veterinary Research Institute, Shanghai Academy of Agricultural Science, Shanghai, 201106, China

    Shi-Juan Dong & Zhen Li

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  1. Min-Jie Gao
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  2. Xiao-Bei Zhan
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  3. Zhi-Yong Zheng
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  4. Jian-Rong Wu
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  5. Shi-Juan Dong
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  6. Zhen Li
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  7. Zhong-Ping Shi
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  8. Chi-Chung Lin
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Correspondence to Xiao-Bei Zhan.

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Gao, MJ., Zhan, XB., Zheng, ZY. et al. Enhancing pIFN-α Production and Process Stability in Fed-Batch Culture of Pichia pastoris by Controlling the Methanol Concentration and Monitoring the Responses of OUR/DO Levels. Appl Biochem Biotechnol 171, 1262–1275 (2013). https://doi.org/10.1007/s12010-013-0221-3

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  • DOI: https://doi.org/10.1007/s12010-013-0221-3

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