Lipase Mutant Engineering for Higher Activity and Stereoselectivity
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Solution Overview
Problem
Existing wild-type lipases exhibit low catalytic efficiency, poor stereoselectivity, and weak stability, limiting their widespread use in industrial applications.
Innovation Solution
A lipase mutant with specific amino acid mutations, such as V154L, and combinations thereof, is developed to enhance enzyme activity and stability, improving solubility and catalytic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wild-type lipase is used for chiral resolution, then the enzyme can catalyze the reaction, but the catalytic efficiency is low and the stereoselectivity is poor
Solution Approach 1:
The patent applies parameter changes by mutating specific amino acid residues in the lipase sequence (e.g., V154L, Q11L, T40S, T44S, Q23L, M72A, W113A, D134H/T/N, T138R, L140V/W/M/A/I, A141I/L/Q/T/V, P143A/G/I, L144G/H/P/R/S/T/D/A, L147P, S150N, P152L, S153P/T, V154K, T186A, I189L, V190I/T/Y/A, V221A, T256A, T259A, E269D, A281P, I285M/V/L/A, G307C, C311L, T316A) to optimize both catalytic efficiency and stereoselectivity. These point mutations modify the enzyme's active site or structural properties to enhance its performance in chiral resolution reactions.
Solution Approach 2:
The patent applies local quality by introducing specific mutations at targeted positions within the lipase molecule rather than global modifications. Each mutation site is carefully selected to locally improve specific functions such as substrate binding, catalytic activity, or enantioselectivity while maintaining the overall enzyme structure and stability.
2Ease of manufacture
If wild-type lipase is used for industrial production, then the enzyme can be expressed in common engineering bacteria, but the expression level is low and the solubility is poor
Solution Approach 1:
The patent applies parameter changes by mutating amino acid residues that affect protein folding, solubility, and expression efficiency. These mutations improve the enzyme's solubility in bacterial expression systems and increase the expression level, making the lipase more suitable for industrial production through genetic engineering.
3Reliability
If wild-type lipase is used, then the enzyme can perform catalysis, but the stability is weak and the enzyme activity is low
Solution Approach 1:
The patent applies parameter changes by introducing point mutations that simultaneously enhance both the stability and enzyme activity of the lipase. The mutated residues are selected to strengthen the enzyme's structural stability while maintaining or improving its catalytic function, resulting in a more robust and efficient biocatalyst for industrial 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 mutant lipase demonstrates significantly improved enzyme activity and solubility, reducing enzyme usage and reaction volume, making it suitable for industrial production with reduced costs and simplified post-treatment processes.
Implementation Method 1
The lipase mutant has ideal solubility and catalytic activity
Implementation Method 2
catalyzing hydrolysis reaction of an ester compound by a lipase
Data Source
AI summary
Provided are a lipase mutant and use thereof. The amino acid sequence of the lipase mutant has a sequence shown in SEQ ID NO: 1, that is, sites at which amino acid mutations occur include a V154L site.