Media Formulation using Complex Organic Nutrients for Improved Activity, Productivity, and Yield of Candida rugosa Lipase and Esterase Enzymes

摘要

Candida rugosa is an excellent source of multiple lipase and esterase enzymes; therefore, it is of technological importance to formulate the medium that provides high activity for each enzyme. In this work, the cultivation medium comprising complex nutrients that provided the highest activity, productivity, and yield of C. rugosa enzymes individually was formulated. Time courses of the extracellular and intracellular lipase and esterase activities of C. rugosa were represented and the role of protease in the cultivation progress was discussed. Urea, soy-peptone, yeast extract, a mixture of soy-peptone and yeast extract, cheese whey, and wheat mill bran were tested for their lipolytic and esterasic activities. Urea provided considerably higher extracellular lipase activity when compared to other nitrogen sources; however, soy-peptone provided the highest extracellular esterase activity. Hazelnut, olive, sesame, soybean, and flax seed oils affected the enzyme activities to different extents related to their fatty acid compositions. Hazelnut oil and olive oil provided the highest extracellular lipase and esterase activities, respectively, whereas sesame oil produced the highest biomass. High C18 and C16 ester contents of vegetable oils promoted high lipase and esterase productions, respectively. A temperature of 30C yielded the highest extracellular and intracellular lipase and esterase activities; however, 35C produced the highest biomass.