Lipase Sequence Variants for Higher Heterologous Expression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lipases from the Proteus/Yersinia clade face challenges in heterologous expression, limiting their industrial applicability and requiring low-cost manufacturing, despite their potential in various industrial applications due to substrate specificity variations.
Innovation Solution
Development of lipase mutants with specific amino acid substitutions at predetermined positions, enhancing heterologous expression and broadening sequence diversity for improved industrial use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lipases from Proteus/Yersinia clade are used for heterologous expression, then substrate specificity and cleansing performance are improved, but manufacturing cost increases due to low expression levels requiring chaperone co-expression
Solution Approach 1:
The patent applies parameter changes by modifying amino acid residues at specific positions (31, 32, 90, 181) in the lipase sequence to improve heterologous expression levels. These sequence modifications enable high-level expression without requiring chaperone co-expression, thereby reducing manufacturing costs while preserving the enzyme's substrate specificity and catalytic performance.
2Reliability
If chaperone co-expression is used to improve folding, then active form production is enhanced, but productivity decreases due to complex expression systems
Solution Approach 1:
The patent extracts the folding problem by directly modifying the lipase sequence to improve its intrinsic foldability and stability. This eliminates the need for chaperone co-expression systems, simplifying the expression system and improving productivity while maintaining reliable production of the active enzyme form.
Solution Approach 2:
The modified lipase sequences possess self-service capabilities for proper folding and stability without requiring external chaperone assistance. The amino acid modifications at key positions enable the enzyme to autonomously achieve its active conformation, streamlining the expression process.
3Adaptability or versatility
If sequence diversity is broadened for different applications, then application versatility is improved, but screening complexity increases
Solution Approach 1:
The patent creates universal lipase variants through targeted amino acid modifications that maintain broad substrate specificity across different applications. The modified sequences at positions 31, 32, 90, and 181 generate enzymes suitable for multiple uses including cleansing, optical resolution, biofuel manufacturing, and wastewater treatment, reducing the need for extensive screening of different lipase variants.
Data Source
AI summary
Provided is a lipase mutant with improved heterologous expression. The lipase mutant consists of an amino acid sequence obtained by substituting an amino acid residue at a predetermined position numbered according to SEQ ID NO: 2 with a predetermined amino acid residue in an amino acid sequence of a parent lipase.