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Optimization of medium composition for enhanced chitin deacetylase production by mutant Penicillium oxalicum SAEM-51 using response surface methodology under submerged fermentation

Paper ID Volume ID Publish Year Pages File Format Full-Text
35268 45083 2011 5 PDF Available
Title
Optimization of medium composition for enhanced chitin deacetylase production by mutant Penicillium oxalicum SAEM-51 using response surface methodology under submerged fermentation
Abstract

Nutritional requirement for maximum production of chitin deacetylase (CDA), an enzyme used for bioconversion of chitin to chitosan, under submerged condition by mutant Penicillium oxalicum SAEM-51 was optimized using response surface methodology (RSM). Among the eight nutritional elements studied, yeast-extract, peptone, (NH4)2SO4 and MgSO4 were identified as the most critical variables for CDA production by Plackett–Burman design first. Further optimization of these variables was done by using a four factor central composite design (CCD). The model came out to be significant and statistical analysis (analysis of variance, ANOVA) of the results showed that yeast extract had contributed significantly (quadratic effect) to the response and its interaction with magnesium sulfate was strong. Peptone was also found to be another important component in the medium that influence the CDA production. Optimum concentration of the variables for enhanced CDA production determined by CCD were—yeast extract (X1) 3.165 g l−1, peptone (X2) 4.754 g l−1, (NH4)2SO4 (X4) 0.255 g l−1 and MgSO4 (X5) 0.535 g l−1. 2.0 fold enhancement in CDA titres was attained in shake flasks, when the variables were used at their optimum levels. CDA production (414.7 ± 6.32 U l−1) in the optimized medium was in good agreement with the values predicted by the quadratic model (399.08 U l−1), confirming the validity of the model. Employment of optimal growth medium would result into large scale production of microbial deacetylase, which further heighten its potential for biological production of chitosan.

Keywords
Chitin deacetylase; Penicillium oxalicum; Optimization; Plackett–Burman design; Central composite design
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Optimization of medium composition for enhanced chitin deacetylase production by mutant Penicillium oxalicum SAEM-51 using response surface methodology under submerged fermentation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 46, Issue 8, August 2011, Pages 1693–1697
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us