Lipase Polypeptides Resolving Interference in Cleaning Compositions
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Solution Overview
Problem
Current cleaning and fabric care compositions often interfere with the effectiveness of lipases, making it difficult for them to efficiently remove lipid stains, as they are not adapted to the harsh conditions present in these compositions.
Innovation Solution
Development of isolated polypeptides with lipase activity that have specific sequence identities or are encoded by polynucleotides that hybridize under certain stringency conditions, allowing them to function effectively in cleaning compositions by either being variants or fragments of known lipases from Fusarium species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lipases are used in cleaning compositions, then they can hydrolyze triglycerides to generate fatty acids, but their effectiveness is interfered with by other active ingredients in the composition, reducing their ability to remove lipid stains
Solution Approach 1:
The patent applies parameter changes by modifying the amino acid sequence of lipase proteins through mutagenesis techniques. Specifically, it identifies and modifies residues in the oxyanion hole region (such as changing Serine to Threonine or Alanine to Valine) to alter the enzyme's properties. These sequence modifications enable the lipase to maintain stability and activity in the presence of other cleaning composition ingredients, thereby resolving the interference problem while preserving triglyceride hydrolysis capability
Solution Approach 2:
The patent applies local quality by making targeted modifications to specific regions of the lipase protein structure, particularly the oxyanion hole region. Instead of changing the entire protein, it focuses on modifying local amino acid residues (positions 195-215 in the sequence) that are critical for enzyme-substrate interaction and stability. This localized modification approach allows the enzyme to gain resistance to interference from other ingredients while maintaining its core catalytic function
2Productivity
If lipases are applied in cleaning compositions, then they can remove lipid stains, but they do not function effectively in the harsh environment of the compositions
Solution Approach 1:
The patent applies parameter changes by systematically modifying physical and chemical parameters of the lipase protein through amino acid substitution. The modifications include changing hydrophobicity, charge distribution, and steric properties in the oxyanion hole region. These parameter changes result in enhanced structural stability and resistance to denaturation in harsh cleaning environments, while maintaining high productivity in lipid stain removal
Solution Approach 2:
The patent employs a strategy of creating multiple variant versions of the lipase with different stability profiles. This allows selection of the most appropriate variant for specific harsh environment conditions, effectively treating each variant as an optimized solution for particular application scenarios where standard lipases would fail
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
These polypeptides enhance the ability to remove lipid stains by maintaining lipase activity in harsh cleaning environments, improving wash performance and stability within cleaning compositions.
Implementation Method 1
Lipases have been employed in compositions for the removal of lipid stains by hydrolyzing triglycerides to generate fatty acids
Data Source
AI summary
Provided are isolated polypeptides with lipase activity and polynucleotides encoding the polypeptides. Also provided are nucleic acid constructs, vectors, and host cells comprising the polynucleotides, and methods of using the polypeptides.