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A High Throughput Screen for Biomining Cellulase Activity from Metagenomic Libraries
Published on: February 1, 2011
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Statistical media optimization and cellulase production from marine Bacillus VITRKHB
Kunal Singh1, Kumari Richa1, Himadri Bose1
1Molecular and Microbiology Research Laboratory, Environmental Biotechnology Division, School of Bio Sciences and Technology, VIT University, Vellore, 632014, Tamil Nadu, India.
3 Biotech
|March 22, 2017
Summary
Marine Bacillus VITRKHB produces extracellular cellulase, an enzyme crucial for breaking down cellulose. Optimization using response surface methodology identified key conditions for maximizing enzyme production.
Area of Science:
- Marine microbiology
- Enzymology
- Biotechnology
Background:
- Marine Bacillus species are recognized for their ability to produce novel enzymes.
- Marine Bacillus VITRKHB exhibits significant cellulolytic activity, making it a candidate for enzyme production.
Purpose of the Study:
- To produce and partially purify extracellular cellulase from Marine Bacillus VITRKHB.
- To investigate the effects of various carbon and nitrogen sources on cellulase production.
- To optimize cellulase production using response surface methodology.
Main Methods:
- Partial purification of cellulase via ammonium sulfate precipitation, dialysis, and DEAE ion exchange chromatography.
- Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) for molecular weight determination.
- Response surface methodology (RSM) to optimize fermentation parameters.
Main Results:
- Purified cellulase has a molecular weight of approximately 33 kDa and a specific activity of 1.92 IU/mg.
- Maximum enzyme activity was achieved using xylose as the carbon source and beef extract as the nitrogen source.
- Optimized conditions for maximum cellulase production include 5.0% xylose, 6.9% beef extract, pH 7.83, 1.17% NaCl, and 25.84°C after 24 hours.
Conclusions:
- Marine Bacillus VITRKHB is a viable source for extracellular cellulase production.
- Optimization of media components and fermentation conditions significantly enhances cellulase yield.
- The identified optimal conditions provide a foundation for further scale-up and application of this enzyme.
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