Engineered Amylase Variants for Heat-Stable Detergent Cleaning
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Solution Overview
Problem
Existing amylases used in detergents lack stability at elevated temperatures and denaturing conditions, necessitating the development of new amylase enzymes that maintain activity under such conditions.
Innovation Solution
Genetically engineered amylase variants with specific amino acid substitutions at positions 4, 25, 176, 186, 251, 405, and 482, exhibiting at least 60% sequence identity with a parent amylase, provide enhanced stability and activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If genetically engineered amylase variants with specific amino acid substitutions are developed, then stability at elevated temperatures and denaturing conditions is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying specific amino acid positions (4, 25, 176, 186, 251, 405, and 482) in the amylase protein sequence to enhance thermal stability and resistance to denaturing conditions. This targeted modification approach improves enzyme reliability without requiring complete redesign of the manufacturing process.
Solution Approach 2:
The invention creates composite enzyme variants by combining multiple amino acid substitutions at specific positions within the parent amylase sequence. These composite modifications work synergistically to provide enhanced stability under harsh detergent conditions while maintaining catalytic activity.
2Reliability
If new amylase variants with enhanced stability are created through genetic engineering, then cleaning performance under harsh conditions is improved, but production cost increases
Solution Approach 1:
The patent implements local quality by introducing specific amino acid substitutions at predetermined positions (4, 25, 176, 186, 251, 405, and 482) rather than random modifications. This targeted approach ensures improved cleaning performance under harsh conditions while minimizing the scope of genetic engineering required, thereby controlling production costs.
3Reliability
If amylase variants with multiple amino acid substitutions are developed, then enzyme activity and stability are improved, but sequence complexity increases
Solution Approach 1:
The patent systematically changes specific parameters (amino acid identities) at predetermined positions in the enzyme sequence. By focusing modifications on specific positions (4, 25, 176, 186, 251, 405, and 482) rather than the entire sequence, the invention improves enzyme activity and stability while maintaining manageable sequence complexity for industrial application.
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 amylase variants demonstrate improved stability and activity, offering enhanced cleaning performance in detergents under elevated temperatures and denaturing conditions.
Implementation Method 1
Amylases are enzymes capable of hydrolyzing starch
Implementation Method 2
enzymes are implemented in washing formulations to improve cleaning efficiency
Data Source
AI summary
In the present invention new amylase enzymes are provided. More specifically, genetically engineered amylase enzymes, compositions comprising the enzymes, and methods of making and using the enzymes or compositions comprising the enzymes are provided.