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  • increased production of alkaline polygalacturonate lyase in the recombinant pichia pastoris by controlling cell concentration during continuous culture

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 655
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     recombinant alkaline polygalacturonate lyase (pgl) production by recombinant pichia pastoris gs115 was selected as a model to study as a continuous culture strategy for enhancing heterologous protein production based on controlling methanol feeding (cccm culture) or on dual carbon source feeding (cccd culture). using the cccm process with a dry cell weight of 75 g/l regulated by controlling methanol concentration in the induction media, the final pgl activity was 441.9 u/ml. the pgl productivity (qv) and the average specific enzyme production rate (qx) were 4.65 u ml−1 h−1 and 84.5 u g−1 h−1, an increase of 42.1% and 191.2%, respectively, over what was achieved with traditional fed-batch culture with high cell density. the control strategies also reduced proteolytic degradation by 84.1% in the fermentation broth and increased cell viability by 12.2%.

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