GH7 Endoglucanase Thermostabilization via Amino Acid Mutations
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Solution Overview
Problem
Current endoglucanases from the GH7 family are not thermostable enough for industrial applications, particularly at elevated temperatures, which limits their effectiveness in processes like saccharification and fiber modification.
Innovation Solution
Development of endoglucanase proteins with amino acid sequences showing at least 96% identity to a specific sequence (SEQ. ID NO. 2) that maintain at least 90% residual substrate conversion activity at 60°C for one hour, exhibiting active thermostabilization and improved temperature stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If endoglucanases from GH7 family are used for industrial applications, then substrate conversion activity is achieved, but thermal stability is insufficient at elevated temperatures
Solution Approach 1:
The patent applies parameter changes by modifying amino acid sequences of endoglucanases to alter their thermal stability parameters. Specific mutations in the protein structure change the enzyme's physical properties, enabling it to maintain activity at elevated temperatures while preserving catalytic function. This directly resolves the contradiction between thermal stability and enzyme activity maintenance.
2Productivity
If temperature is increased for industrial processes, then processing efficiency is improved, but enzyme stability decreases
Solution Approach 1:
The invention changes the biochemical parameters of the enzyme through amino acid mutations, allowing the enzyme to withstand higher processing temperatures. This enables industrial processes to run at elevated temperatures for improved productivity while the modified enzyme maintains its structural stability and catalytic activity under these 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 resulting endoglucanases demonstrate enhanced thermal stability and active thermostabilization, allowing them to maintain high substrate conversion activity at elevated temperatures, thus improving their performance in industrial processes such as lignocellulose saccharification and fiber modification.
Implementation Method 1
Cellulases comprise a structurally and functionally diverse class of glycohydrolases acting on cellulose. Having in common the hydrolytic cleavage activity of glycosidic bonds present in cellulose polymers or oligomers
Data Source
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AI summary
The present invention relates to thermostable endoglucanases, particularly to proteins having endoglucanase activity which comprises an amino acid sequence having at least 96% identity to SEQ. ID NO.: 2, and proteins having endoglucanase activity which belongs to the GH7 class and which shows active thermostabilization.