Lipase Propeptide Modification for Active Yield
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Solution Overview
Problem
Current methods for producing lipases face challenges in achieving high yields of active lipase protein suitable for use in cleaning compositions, as existing lipase preparations often have a low percentage of active enzyme, limiting their industrial application due to harsh environmental conditions in detergents.
Innovation Solution
The modification of polynucleotides encoding lipases by altering nucleotides in the propeptide sequence, specifically through substitutions, insertions, or deletions, to enhance the production and stability of lipases, resulting in increased lipolytic activity and improved wash performance in detergent compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional polynucleotides encoding lipase are used, then production cost is reduced, but the yield of active lipase protein is low
Solution Approach 1:
The patent applies parameter changes by modifying the polynucleotide sequence encoding the propeptide region of lipase. Specific amino acid substitutions (e.g., L57V, L14V, V67A, S65A) are introduced to alter the propeptide structure, which enhances the yield of active lipase protein without requiring complex manufacturing processes. This sequence optimization allows standard production methods to achieve higher yields.
2Adaptability or versatility
If lipase preparations are produced for detergent use, then industrial application potential increases, but the percentage of active enzyme is low due to harsh environmental conditions
Solution Approach 1:
The patent applies local quality by specifically modifying the propeptide region of the lipase molecule while leaving the catalytic domain unchanged. The modified propeptide (with substitutions like L57V, L14V, V67A, S65A) provides enhanced stability and activity under detergent conditions, while the mature lipase region maintains its natural catalytic function. This localized modification strategy improves detergent compatibility without altering the core enzyme function.
3Productivity
If propeptide modifications are introduced to increase active lipase yield, then lipolytic activity increases, but the complexity of polynucleotide modification increases
Solution Approach 1:
The patent applies segmentation by dividing the lipase gene into two functional regions: the propeptide coding region and the mature lipase coding region. Modifications are introduced only in the propeptide segment (e.g., codon changes for L57V, L14V, V67A, S65A substitutions) while keeping the mature lipase segment unchanged. This segmented approach allows targeted optimization of lipolytic activity through relatively simple propeptide modifications without requiring complex entire-gene redesign.
Data Source
AI summary
The invention relates to a method for generating a preparation of lipase with increased lipolytic activity comprising a step of altering one or more nucleotides in a polynucleotide comprising a first polynucleotide encoding a propeptide operationally linked to a second polynucleotide encoding a lipase, wherein the alteration of one or more nucleotides are made in the first polynucleotide and the alteration independently results in a substitution, an insertion or a deletion in the encoded propeptide amino acid sequence.