Enhanced production of exocellular glucansucrase from Leuconostoc dextranicum NRRL B-1146 using response surface method |
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Authors: | Majumder Avishek Goyal Arun |
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Institution: | Department of Biotechnology, Indian Institute of Technology Guwahati, North Guwahati, Guwahati 781 039, Assam, India. |
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Abstract: | Statistically-based experimental designs were applied to optimize the fermentation for the production of glucosyltransferase by Leuconostoc dextranicum NRRL B-1146. Eleven medium components were examined for their significance on enzyme production using Plackett-Burman factorial design. Tween 80, sucrose and K2HPO4 significantly improved the enzyme production process. The combined effect of these nutrients on glucansucrase production were studied using a 2 2 full-factorial central composite design, a second-order polynomial was established to identify the relationship between the enzyme output and the three medium components. The optimal concentration of variables for maximum glucansucrase production were Tween 80 (0.55%, v/v); sucrose (5.6%, w/v) and K2HPO4 (1%, w/v). The maximum enzyme activity by predicted model was 6.53 U/ml that was in perfect agreement with the actual experimental value (6.40 U/ml). |
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