Abstract
The extracellular lipase of Yarrowia lipolytica presents numerous potentialities for biotechnological applications. This work describes the development and storage of powders obtained from supernatants containing Y. lipolytica lipase by freeze-drying as downstream process that is important in obtaining a stable lipase powder with high enzymatic activity. Lipase was produced by Y. lipolytica U6 mutant strain in 20-L bioreactor. Non-concentrated cell-free culture supernatant samples were supplemented with different concentrations (0.5–1 %) of maltodextrin and glycerol as additives to freeze-drying. Effects of additives, temperature, pH, and storage time on lipase powders were determined. After addition of additives, freeze-drying yield increased 3.5-fold compared to supernatant without additive. Maltodextrin with 0.5 % concentration gave the best protection of lipase during dehydration treatment and its freeze-drying yield (77 %) is better than other formulations. Lipase powders were stored at 4 and 25 °C for 46 weeks without loss of lipase activity. A common impediment to the production of commercial enzyme is their low-stability aqueous solutions. The present study shows that freeze-dried lipase powders of Y. lipolytica have good stability for storage and various applications.
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Authors would like to thank Annick Salve, Martine Allegaert and Robin Dubois Dauphin for their help.
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Darvishi, F., Destain, J., Nahvi, I. et al. Effect of Additives on Freeze-Drying and Storage of Yarrowia lipolytica Lipase. Appl Biochem Biotechnol 168, 1101–1107 (2012). https://doi.org/10.1007/s12010-012-9844-z
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DOI: https://doi.org/10.1007/s12010-012-9844-z