Microbial Polyactive Carbohydrate Production via Enzymatic Conversion
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Solution Overview
Problem
Current methods for producing chitosan are inefficient, wasteful, and costly, requiring harsh chemicals and solvents, and are not suitable for individuals with shellfish allergies or dietary restrictions.
Innovation Solution
Development of microbial cells transformed with a DNA construct containing genes for chitin synthase, chitosanase, and chitin deacetylase to produce a polyactive carbohydrate, which can be used in various industrial and medical applications without the need for harsh chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional methods are used to extract chitosan from crustacean shells, then chitosan can be produced, but the process requires harsh chemicals and solvents, is laborious, and generates hazardous waste
Solution Approach 1:
The patent replaces chemical extraction methods with a biological system. Microbial cells are transformed with genes encoding chitinase and chitin deacetylase enzymes, which naturally degrade chitin into chitosan. This biological substitution eliminates the need for harsh chemicals like sodium hydroxide and carbondisulfide, thereby removing harmful factors while maintaining production capability
Solution Approach 2:
The patent introduces microbial cells as intermediary agents between chitin substrate and chitosan product. These engineered microorganisms serve as biocatalysts that mediate the conversion process through enzymatic action, replacing direct chemical treatment and eliminating hazardous reagent requirements
2Productivity
If chitosan is extracted from shellfish, then chitosan product is obtained, but individuals with shellfish allergies, vegans, vegetarians, and people with religious prohibitions cannot use the product
Solution Approach 1:
The patent extracts only the necessary functional component (chitosan) from its traditional shellfish source by using engineered microbes to produce chitosan de novo. The microbial production system separates the production process from the allergenic source material, allowing chitosan to be produced without any shellfish involvement, thereby expanding accessibility to all consumer groups
Solution Approach 2:
The patent creates a synthetic biological copy of the chitosan production pathway. Instead of extracting chitosan from shellfish, the system uses microbial cells engineered with chitinase and chitin deacetylase genes to synthesize chitosan from chitin substrate, producing an identical functional product without the allergenic source
3Productivity
If existing separation methods are used to obtain chitosan, then chitosan can be separated from crustacean shells, but the reagents cannot easily access the polymer due to the crystalline nature of chitin
Solution Approach 1:
The patent replaces mechanical/chemical separation processes with enzymatic degradation. Engineered microbial cells produce chitinase enzymes that specifically cleave the crystalline chitin structure into soluble oligosaccharides, which are then converted to chitosan. This enzymatic approach overcomes the inaccessibility problem of crystalline chitin that plagues traditional separation methods
Solution Approach 2:
The patent changes the physical-chemical parameters of the chitin substrate through enzymatic action. Chitinase enzymes modify the molecular structure and crystallinity of chitin, converting it from an inaccessible crystalline form to a soluble, processable form that can be easily converted to chitosan, thereby improving separation efficiency
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 process allows for the production of polyactive carbohydrates that can enhance physiological properties of plants, have medical applications, and be used in construction, materials science, and personal care products, while avoiding the drawbacks of traditional chitosan production.
Implementation Method 1
a chitosanase, which produces chitosan oligosaccharides from the chitin
Implementation Method 2
a chitin deacetylase, which produces a polyactive carbohydrate from the chitosan oligosaccharides
Data Source
AI summary
Described herein are biological devices and methods for using the same to produce a polyactive carbohydrate. The biological devices include microbial cells transformed with a DNA construct containing genes for producing a chitin synthase, a chitosanase, and a chitin deacetylase. In some instances, the biological devices also include a gene for lipase. Methods for using the polyactive carbohydrate are also provided herein, including, but not limited to, enhancing the physiological properties of plants; medical applications; applications in the construction, materials science, and home goods industries; personal care, grooming, cosmetics, and oral care compositions containing the polyactive carbohydrate; methods for water decontamination; and the production of polyurethanes.