Beta-Mannanase Y25H Mutation Enhances Yield and Activity
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Solution Overview
Problem
Current β-mannanases face challenges in achieving high production yield and enzymatic activity, particularly under industrial conditions, which limits their industrial applications and economic value.
Innovation Solution
Site-directed mutagenesis is employed based on structural analysis of β-mannanase, specifically substituting Tyrosine at position 25 with Histidine, to enhance the enzyme's activity and yield, resulting in a more efficient and thermotolerant β-mannanase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If site-directed mutagenesis is performed to improve enzymatic activity, then production yield and activity increase, but production complexity and cost increase
Solution Approach 1:
The patent applies parameter changes by modifying the amino acid sequence at specific positions (Y25H, Y25N, Y25A substitutions) to improve enzymatic activity and production yield. This targeted mutation approach changes the chemical parameters of the enzyme to achieve better performance without completely redesigning the production system.
Solution Approach 2:
The patent uses structural information from wild-type β-mannanase as a template to create improved variants through site-directed mutagenesis. The crystal structure serves as a copy or model that guides the rational design of mutated versions with enhanced properties.
2Productivity
If site-directed mutagenesis is performed to improve enzymatic activity, then production yield and activity increase, but manufacturing cost increases
Solution Approach 1:
The patent modifies specific amino acid parameters (tyrosine to histidine or asparagine at position 25) to enhance enzymatic activity. This targeted parameter change approach improves manufacturing efficiency by reducing the need for extensive purification and processing steps.
Solution Approach 2:
The improved β-mannanase exhibits enhanced stability and activity that reduce the need for additional processing aids, stabilizers, or complex manufacturing interventions, allowing the enzyme to perform its function more effectively with simpler manufacturing processes.
3Adaptability or versatility
If β-mannanase is modified for industrial applications, then adaptability to industrial conditions improves, but enzyme stability may be compromised
Solution Approach 1:
The patent carefully selects amino acid substitutions (Y25H, Y25N, Y25A) that improve adaptability to industrial conditions while maintaining or enhancing enzyme stability. The mutations are designed to optimize catalytic activity without disrupting the overall structural integrity of the enzyme.
Solution Approach 2:
The patent applies local quality changes by modifying only specific residues (position 25) rather than the entire enzyme structure. This localized mutation approach allows improvement of industrial adaptability while preserving the stable core structure of the β-mannanase enzyme.
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 modified β-mannanase exhibits a 1.68-fold increase in production yield and 1.5-fold increase in enzymatic activity, maintaining thermostability, thus improving its industrial competitiveness and reducing production costs.
Implementation Method 1
β-mannanase which catalyzes random hydrolysis of manno-glycosidic bonds in the main chain
Implementation Method 2
β-mannanase (EC 3.2.1.78)...catalyzes random hydrolysis of manno-glycosidic bonds
Data Source
AI summary
A β-mannanase having increased production yield and enzymatic activity is disclosed. The β-mannanase has a modified amino acid sequence of SEQ ID NO: 2, wherein the modification is a substitution of Tyrosine at position 25 with Histidine.