Chondrosulfatase Expression Optimization in Microbial Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing chondroitin sulfate lyase (ChSase) from microorganisms result in low enzyme activity, complex purification processes, and high production costs, limiting its industrial application and reliance on imported, expensive products.
Innovation Solution
Screening and identifying ChSase from soil and sewage samples, optimizing its expression in E. coli and B. subtilis using engineered strains and plasmids like pBRSFDuet-1 and pHT01, with codon and promoter optimizations, achieving high enzyme activity up to 11976.5 U/L.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ChSase is derived from microorganisms through fermentation, then enzyme production is achieved, but the enzyme activity is low and the process is complicated
Solution Approach 1:
The patent applies parameter changes by optimizing fermentation conditions including temperature (25-37℃), pH (7.0-7.5), and aeration rate (1-3 v/v/min) to maximize enzyme activity. The fermentation time is controlled at 16-24 hours to achieve peak productivity of 322.17 U/L while maintaining process feasibility
Solution Approach 2:
The patent segments the complex purification process into distinct steps: one-step dialysis followed by four-step column chromatography. This segmentation allows each step to be optimized independently, achieving enzyme purification while managing the inherent complexity of the process
2Quantity of substance
If ChSase is heterologously expressed in E. coli with GAPDH co-expression, then enzyme expression is increased, but enzyme activity after purification is reduced by 3.1 times
Solution Approach 1:
The patent uses GAPDH as an intermediary protein to facilitate ChSase expression in E. coli. The GAPDH-ChSase fusion protein allows for increased expression levels while the mediator approach enables subsequent purification, though it results in a 3.1-fold reduction in specific activity after purification
3Productivity
If purification process is applied to ChSase from Aeromonas sobria, then enzyme production capacity is high, but the process is complicated, costly and not conducive to industrial amplification
Solution Approach 1:
The patent extracts and isolates the ChSase gene from Aeromonas sobria through metagenomic sequencing and artificial synthesis. By taking out the essential genetic component and expressing it in optimized systems with controlled purification, the method achieves high production capacity while improving ease of manufacture for industrial scaling
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
Simplified process with high enzyme activity, enabling efficient biosynthesis of ChSase for low molecular weight chondroitin sulfate production in medicine, cosmetics, and biology, reducing costs and simplifying industrial amplification.
Implementation Method 1
ChSase), a lyase that can degrade glycosaminoglycans such as chondroitin sulfate, dermatin sulfate and hyaluronic acid into unsaturated disaccharides and oligosaccharides
Data Source
Figure 1~2
Figure 3
AI summary
The invention belongs to the technical field of biological engineering, and discloses the screening, identification and optimized expression of chondrosulphatase. The invention screens and identifies a chondrosulphatase from the nature, which the highest similarity between its amino acid sequence and the chondrosulphatase reported by NCBI is 85%. The invention achieved the high-efficiency biosynthesis of high activity chondrosulphatase with the highest enzyme activity of 11976.5 U/L by expression optimization in E. coli and B. subtilis, and simplified the whole process and post-treatment. The invention has potential and wide application value in the preparation of products containing low molecular weight chondrosulphatase in the fields of medicine, cosmetics and biology, and lays a foundation for the efficient fermentation of microbial system to prepare chondrosulphatase with high enzyme activity, and is suitable for industrial production and application.