Beta-Glucosidase Polypeptides for Lignocellulose Degradation
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Solution Overview
Problem
There is a need to improve cellulolytic enzyme compositions for more efficient degradation of lignocellulose to enhance ethanol production from biomass, as current methods are inefficient and costly.
Innovation Solution
Development of polypeptides with beta-glucosidase activity and corresponding polynucleotides that can be used to create enzyme compositions for treating cellulosic materials, allowing for effective saccharification and fermentation of lignocellulosic feedstocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current cellulolytic enzyme compositions are used for degradation of lignocellulose, then the process can proceed, but the efficiency is low and the cost is high
Solution Approach 1:
The patent introduces a novel beta-glucosidase polypeptide with optimized amino acid sequence and structural parameters that enhances catalytic efficiency. The enzyme exhibits improved specificity toward cellobiose and cellooligosaccharides, allowing for more effective hydrolysis of cellulose to glucose at lower enzyme concentrations, thus resolving the contradiction between degradation efficiency and enzyme quantity required.
2Productivity
If more cellulolytic enzymes are added to improve degradation efficiency, then the efficiency increases, but the cost increases
Solution Approach 1:
The patent describes a beta-glucosidase polypeptide that can be produced through recombinant expression in host cells, providing a cost-effective enzyme source. The enzyme's high catalytic efficiency means lower doses are required, reducing the overall cost of enzyme composition while maintaining or improving degradation efficiency. The polypeptide coding sequence can be cloned and expressed in various host systems, enabling scalable and economical production.
3Productivity
If current enzyme compositions are used for saccharification, then the process can proceed, but the conversion efficiency to fermentable sugars is insufficient
Solution Approach 1:
The patent introduces a beta-glucosidase polypeptide with optimized catalytic parameters including improved Km and kcat values for cellobiose hydrolysis. The enzyme demonstrates enhanced ability to convert cellobiose and cellooligosaccharides into glucose, the fermentable sugar required for ethanol production. This increased conversion efficiency reduces the total enzyme composition quantity needed while improving sugar yield.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of these polypeptides and polynucleotides in enzyme compositions enhances the efficiency of lignocellulose degradation, reducing the amount of cellulolytic enzymes required and improving the conversion of biomass into ethanol, thereby making the process more cost-effective and efficient.
Implementation Method 1
Beta-glucosidases hydrolyze cellobiose to glucose. The present invention provides polypeptides having beta-glucosidase activity
Implementation Method 2
polynucleotides encoding the polypeptides. The present invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides
Data Source
AI summary
Provided are isolated polypeptides having beta-glucosidase activity and polynucleotides encoding the polypeptides. Also provided are nucleic acid constructs, vectors and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides.