Xylanase Polypeptides for High Biomass Conversion Rates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current xylanases face limitations due to low conversion rates, substrate and product selectivity, and compatibility issues, particularly at high temperatures and specific pH conditions, which restrict their industrial applicability and efficiency in converting xylose-containing polysaccharides from biomass into valuable products.
Innovation Solution
Development of novel polypeptides with high xylanase activity, exhibiting at least 75% sequence identity to specific amino acid sequences, which demonstrate enhanced thermostability, pH stability, and substrate compatibility, allowing for efficient conversion of xylose-containing polysaccharides with high conversion rates and synergistic interaction with other enzymes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional xylanases are used, then the enzymatic degradation of xylan can be achieved, but the conversion rate is low and substrate selectivity is limited
Solution Approach 1:
The patent applies parameter changes by modifying the amino acid sequence of xylanase enzymes to achieve optimal catalytic parameters. Specific mutations were introduced to enhance the enzyme's ability to bind substrates and catalyze hydrolysis, resulting in improved conversion rates and substrate selectivity while maintaining stability under industrial process conditions
2Speed
If xylanases operate at high temperature, then the processing speed increases, but the enzyme stability decreases
Solution Approach 1:
The patent employs parameter changes by optimizing the thermal parameters of the enzyme through amino acid sequence modification. Mutations were introduced that enhance the enzyme's structural stability at elevated temperatures, allowing it to maintain both high processing speed and stability under industrial conditions
Solution Approach 2:
The invention creates a composite enzyme system combining multiple enzymatic activities and stabilizing elements. The engineered xylanase incorporates features from different enzyme families and structural motifs that work synergistically to provide both high temperature stability and catalytic efficiency
3Power
If xylanases are used under specific pH conditions, then the catalytic activity is optimized, but the adaptability to different process conditions is reduced
Solution Approach 1:
The patent applies universality by engineering the xylanase to perform optimal catalysis across a broad pH range rather than being restricted to a narrow optimal pH. The enzyme was designed to maintain high catalytic activity from pH 3 to pH 7, making it universally applicable to different industrial processes without requiring separate enzyme formulations for different pH conditions
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 novel polypeptides achieve high conversion rates of xylose-containing polysaccharides, maintaining activity across a wide pH range and elevated temperatures, and show improved stability against proteases, leading to increased efficiency and cost reduction in biomass conversion processes.
Implementation Method 1
Endo-xylanases (e.g. endo-β-1,4-xylanase) hydrolyze the internal β-glycosidic linkages in xylan, arabinoxylan, and/or other xylose-containing polysaccharides to produce smaller molecular weight xylo-oligomers or xylose monomers
Implementation Method 2
Xylanases (β-1,3- or β-1,4-xylan xylohydrolase; E.C. 3.2.1.8) are xylanolytic enzymes that depolymerize xylan, arabinoxylan, and/or other xylose-containing polysaccharides
Data Source
AI summary
The present application provides novel polypeptides having xylanase activity and the respective nucleic acid sequences encoding those polypeptides as well as vectors comprising these nucleic acid sequences and host cells transformed by these vectors. In addition the present invention provides a method for producing these polypeptides and a composition comprising the inventive polypeptides.