Variant Alpha-Amylase Mutations for Thermostable Detergent Cleaning
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Solution Overview
Problem
Existing α-amylases do not effectively address the need for improved thermostability, detergent stability, and cleaning performance in various molecules and the need for robust engineered α-amylases molecules with enhanced thermostability, detergent stability, and cleaning performance compared to the parent α-amylases.
Innovation Solution
The development of recombinant variant α-amylases with specific mutations at amino acid residues, such as E187, S241, N126, Y150, F153, L171, and I203, and combinations thereof, to enhance thermostability, detergent stability, and cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mutations are introduced to improve thermostability and detergent stability, then enzyme stability is enhanced, but enzyme activity may be reduced
Solution Approach 1:
The patent applies parameter changes by systematically modifying amino acid residues at specific positions (E187, S241, N126, Y150, F153, L171, I203) to alter the enzyme's physical-chemical properties. This enables the enzyme to maintain both enhanced stability and preserved activity through precise molecular parameter optimization.
Solution Approach 2:
The patent implements local quality by introducing mutations at specific localized positions within the enzyme structure rather than throughout the entire molecule. This targeted approach allows stability enhancement at critical regions while preserving the overall catalytic function and activity of the enzyme.
2Reliability
If multiple mutations are combined to enhance performance, then thermostability and detergent stability are improved, but the complexity of enzyme engineering increases
Solution Approach 1:
The patent applies segmentation by dividing the enzyme engineering process into discrete mutation events at specific amino acid positions. Each mutation (E187, S241, N126, Y150, F153, L171, I203) represents a separate, manageable modification that can be independently designed, tested, and combined, reducing the overall complexity of the engineering process.
Solution Approach 2:
The patent implements merging by combining multiple beneficial mutations at different amino acid positions into a single engineered enzyme variant. This consolidation of multiple stability-enhancing mutations into one integrated solution simplifies the final product while achieving cumulative stability improvements.
3Productivity
If mutations are introduced to enhance cleaning performance, then cleaning effectiveness is improved, but the risk of losing other desirable properties increases
Solution Approach 1:
The patent applies universality by engineering enzyme variants that simultaneously achieve multiple desirable properties: enhanced thermostability, improved detergent stability, and maintained or improved cleaning performance. The multi-functional design ensures that no single property is sacrificed for another, creating a robust enzyme suitable for diverse cleaning 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 variant α-amylases exhibit improved thermostability, detergent stability, and enhanced cleaning performance, making them suitable for applications in starch liquefaction, saccharification, and cleaning starchy stains.
Implementation Method 1
α-amylases hydrolyze starch, glycogen, and related polysaccharides by cleaving internal α-1,4-glucosidic bonds at random
Data Source
AI summary
Disclosed are compositions and methods relating to variant alpha-amylases. The variant alpha-amylases are useful, for example, for starch liquefaction and saccharification, for cleaning starchy stains in laundry, dishwashing, and other applications, for textile processing (e.g., desizing), in animal feed for improving digestibility, and for baking and brewing.