D-Psicose 3-Epimerase Enzyme for High-Yield Psicose Production
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Solution Overview
Problem
Current methods for producing D-psicose, such as chemical methods, require complex purification processes due to high byproduct generation, and biological methods have low yields and high production costs.
Innovation Solution
Development of a novel D-psicose 3-epimerase enzyme and its associated recombinant vector and microorganism, which efficiently converts D-fructose to D-psicose with high temperature stability and rapid conversion rates, enabling high-yield production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If chemical methods are used to produce psicose from D-fructose, then psicose can be produced, but the purification process becomes complicated due to large amount of byproducts generated
Solution Approach 1:
The patent replaces chemical catalysis methods with a biological enzyme system (D-psicose 3-epimerase from Kaistia adipata) to catalyze the conversion of D-fructose to psicose. This biochemical substitution eliminates the need for complex chemical purification processes while maintaining high production efficiency, as the enzyme catalyzes the reaction with high specificity and minimal byproduct formation.
Solution Approach 2:
The patent optimizes reaction parameters including temperature (30-70°C, preferably 40-60°C), pH (6.0-8.0), and enzyme concentration to maximize psicose production yield. By adjusting these parameters, the system achieves high conversion rates while simplifying downstream purification, as the enzyme operates under mild conditions that preserve product integrity and reduce impurity formation.
2Quantity of substance
If biological methods using microorganisms producing D-psicose 3-epimerase are used, then psicose can be produced, but the yield is very low and production costs are high
Solution Approach 1:
The patent isolates and purifies the D-psicose 3-epimerase enzyme from the microorganism Kaistia adipata, separating the catalytic function from the cellular machinery. This allows the enzyme to be used in vitro under optimized conditions, achieving much higher conversion rates and productivity compared to whole-cell biocatalysis, while reducing production costs through enzyme reuse and simplified processing.
Solution Approach 2:
The patent involves cloning the gene encoding D-psicose 3-epimerase and expressing it in a recombinant system, creating multiple copies of the enzyme. This amplification of the catalytic component dramatically increases production capacity and efficiency, allowing large-scale psicose synthesis without the limitations of natural microorganism growth rates.
3Quantity of substance
If conventional D-psicose 3-epimerase is used for psicose production, then conversion can occur, but the conversion rate is slow and production yield is low
Solution Approach 1:
The patent optimizes reaction conditions including temperature (30-70°C), pH (6.0-8.0), and substrate concentration to enhance enzyme activity and conversion rate. These parameter optimizations, combined with the use of purified enzyme at controlled concentrations, dramatically reduce reaction time while maximizing psicose yield, addressing both the conversion amount and time loss issues.
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 novel enzyme significantly improves the production yield of D-psicose with high efficiency and stability, reducing production costs and simplifying the purification process.
Implementation Method 1
a biological method for producing psicose from D-fructose by using a microorganism producing D-psicose 3-epimerase
Implementation Method 2
Epimerization of ketohexoses
Data Source
AI summary
The present disclosure relates to novel D-psicose 3-epimerase and a method for producing psicose using the same.