Abstract
The performance of traditional heterologous protein production by Pichia pastoris with methanol induction at 30 °C is poor, characterized by low ATP regeneration rate and weak operation stability. A low temperature induction strategy at 20 °C was thus adopted for efficient porcine interferon-α production in a 10 L fermentor. With the strategy, maximal methanol tolerance level could reach about 40 g/L to effectively deal with methanol concentration variations, so that the complicated on-line methanol measurement system could be eliminated. Moreover, metabolic analysis based on multiple state-variables measurements indicated that pIFN-α antiviral activity enhancement profited from the formation of an efficient ATP regeneration system at 20 °C induction. Compared to the induction strategy at 30 °C, the proposed strategy increased the ATP regeneration rate by 49–66%, the maximal pIFN-α antiviral activity was enhanced about 20-fold and reached a higher level of 1.5×106 IU/mL.
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Gao, M., Dong, S., Yu, R. et al. Improvement of ATP regeneration efficiency and operation stability in porcine interferon-α production by Pichia pastoris under lower induction temperature. Korean J. Chem. Eng. 28, 1412–1419 (2011). https://doi.org/10.1007/s11814-010-0527-6
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DOI: https://doi.org/10.1007/s11814-010-0527-6