Cellobiohydrolase Variants for Thermal Stability in Biomass Saccharification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for cellobiohydrolase variants with improved properties to enhance the efficiency of saccharification of lignocellulosic feedstocks, which are essential for converting lignocellulosic biomass into ethanol efficiently.
Innovation Solution
The development of cellobiohydrolase variants with specific substitutions at positions corresponding to positions 8, 17, 113, 157, 159, 184, 199, 240, 250, 274, 318, 325, 328, 347, 349, 358, 360, 391, 393, 394, and 430, which maintain cellobiohydrolase activity and potentially improve thermal stability and activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellobiohydrolase variants with specific substitutions are developed, then thermal stability and activity are improved, but the complexity of enzyme production increases
Solution Approach 1:
The patent applies parameter changes by modifying specific amino acid positions (8, 17, 113, 157, 159, 184, 199, 240, 250, 274, 318, 325, 328, 347, 349, 358, 360, 391, 393, 394, 430) in the cellobiohydrolase sequence to improve thermal stability and activity. This targeted substitution approach resolves the contradiction by achieving reliability improvement through controlled parameter modification rather than complete enzyme redesign.
Solution Approach 2:
The patent applies local quality by making specific substitutions at defined positions in the enzyme sequence while maintaining the rest of the structure intact. This localized modification approach allows thermal stability improvement without requiring complete redesign of the enzyme production system, thus managing complexity while achieving the desired reliability enhancement.
2Productivity
If cellobiohydrolase variants with specific substitutions are developed, then saccharification efficiency is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent improves saccharification efficiency by changing specific parameters (amino acid substitutions at defined positions) in the cellobiohydrolase variants. This targeted approach enhances productivity while keeping manufacturing relatively simple by only modifying specific residues rather than requiring complete process redesign.
Solution Approach 2:
The patent creates cellobiohydrolase variants that can function effectively across different saccharification conditions, providing multi-functionality. The variants maintain broad substrate specificity and activity under varying conditions, improving overall saccharification efficiency without requiring separate optimized processes for different scenarios.
3Temperature
If cellobiohydrolase variants with improved thermal stability are produced, then enzyme activity at high temperature is enhanced, but the cost of enzyme development increases
Solution Approach 1:
The patent enhances thermal activity by making targeted parameter changes (amino acid substitutions) at specific positions in the enzyme sequence. This approach improves high-temperature performance while minimizing development resources by focusing on key positions rather than conducting exhaustive screening of all possible mutations.
Solution Approach 2:
The patent applies preliminary action by pre-identifying and targeting specific amino acid positions for substitution based on structural and functional analysis. This preliminary identification of key positions reduces the need for extensive trial-and-error experimentation, thereby enhancing thermal activity while controlling development costs.
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
These variants improve the efficiency of saccharification processes by enhancing the thermal stability and activity of cellobiohydrolases, leading to more effective conversion of lignocellulosic materials into fermentable sugars, thereby improving ethanol production from biomass.
Implementation Method 1
Cellobiohydrolases sequentially release molecules of cellobiose from the ends of the cellulose polymer
Data Source
AI summary
The present invention relates to cellobiohydrolase variants, polynucleotides encoding the variants; nucleic acid constructs, vectors, and host cells comprising the polynucleotides; and methods of using the variants.