Engineered Alpha-Amylase Polypeptides for Industrial Starch Conversion
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Solution Overview
Problem
Current alpha-amylase enzymes used in industries such as starch liquefaction, textile desizing, and brewing lack optimal performance and stability, particularly in converting starch into maltodextrins and mono- and disaccharides, and have limitations in textile washing and starch modification processes.
Innovation Solution
Development of isolated polypeptides with specific sequence identities and variants that retain alpha-amylase activity, including catalytic and carbohydrate binding domains, encoded by polynucleotides, for use in starch conversion, textile washing, and brewing processes, with improved stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional alpha-amylase enzymes are used for starch conversion, then basic enzymatic activity is provided, but performance and stability are insufficient for optimal industrial processes
Solution Approach 1:
The patent applies parameter changes by modifying amino acid sequences of alpha-amylase enzymes to create variants with improved stability and activity. Specific amino acid substitutions, deletions, and insertions are introduced to optimize enzymatic performance for industrial applications while maintaining catalytic function.
Solution Approach 2:
The patent creates composite enzymatic structures by combining catalytic domains with carbohydrate-binding domains in specific configurations. This composite approach enhances both stability and activity, allowing the enzyme to maintain optimal performance under industrial processing conditions.
2Productivity
If alpha-amylase enzymes are used for textile desizing and washing, then starch removal is achieved, but performance limitations restrict process optimization
Solution Approach 1:
The patent modifies enzymatic parameters through amino acid sequence variations to enhance performance consistency across different textile processing conditions. The engineered variants demonstrate more reliable performance in textile desizing and washing applications.
3Productivity
If existing alpha-amylase variants are used for brewing and ethanol production, then starch liquefaction is performed, but conversion efficiency and process optimization are limited
Solution Approach 1:
The patent optimizes enzymatic parameters for brewing and ethanol production by introducing specific amino acid modifications that enhance both liquefaction rate and conversion consistency. The engineered alpha-amylase variants provide more reliable and efficient performance in these industrial applications.
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 polypeptides demonstrate enhanced stability and activity, enabling efficient starch conversion, improved textile washing, and optimized brewing processes, with applications in ethanol production and starch modification, addressing the limitations of existing alpha-amylase enzymes.
Implementation Method 1
Alpha-amylases (alpha-1,4-glucan-4-glucanohydrolases, EC. 3.2.1.1) constitute a group of enzymes which catalyze hydrolysis of starch and other linear and branched 1,4-glucosidic oligo- and polysaccharides
Data Source
AI summary
The present invention relates to isolated polypeptides having alpha-amylase activity, catalytic domains, carbohydrate binding domains and polynucleotides encoding the polypeptides, catalytic domains or carbohydrate binding domains. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides, catalytic domains or carbohydrate binding domains.