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Preparation of cellulase concoction using differential adsorption phenomenon
Sachinkumar Birhade1, Mukesh Pednekar1, Shilpa Sagwal1
1a DBT-ICT Centre of Energy Biosciences , Institute of Chemical Technology, Nathalal Parikh Marg, Matunga , Mumbai , Maharashtra , India.
Preparative Biochemistry & Biotechnology
|January 4, 2017
Summary
Controlling cellulose hydrolysis by exploiting enzyme adsorption differences allows targeted production of cellobiose or cellooligosaccharides from lignocellulosic biomass. This method enhances sugar production efficiency.
Area of Science:
- Biomass Conversion and Bioenergy
- Enzymology and Biocatalysis
- Carbohydrate Chemistry
Background:
- Enzymatic cellulose hydrolysis is key for producing valuable sugars like cellobiose and cellooligosaccharides from lignocellulosic biomass.
- Controlling the depolymerization process is challenging due to the synergistic action of multiple cellulase enzymes.
Purpose of the Study:
- To control cellulose hydrolysis by exploiting differential adsorption properties of cellulase components onto cellulosic substrates.
- To selectively produce specific sugar products, such as cellobiose or cellooligosaccharides.
Main Methods:
- Investigated cellulase component adsorption onto pretreated lignocellulosic biomass versus synthetic cellulose.
- Separated cellulase fractions based on differential adsorption (adsorbed exocellulases, unadsorbed enzymes).
- Performed hydrolysis using the separated enzyme fractions to analyze product distribution.
Main Results:
- Cellulase adsorption was significantly higher on pretreated biomass compared to synthetic cellulose.
- Exocellulases preferentially adsorbed, while β-glucosidases remained largely unadsorbed.
- The adsorbed enzyme fraction (rich in exocellulases) yielded predominantly cellobiose.
- The unadsorbed enzyme fraction (rich in endocellulases) yielded predominantly cellooligosaccharides.
Conclusions:
- Differential adsorption of cellulase components offers a viable strategy to control cellulose hydrolysis.
- This method enables targeted production of specific sugar products, enhancing the efficiency of biomass conversion.
