Mutant Acid Phosphatase for Green L-Ascorbate-2-Phosphate Synthesis
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Solution Overview
Problem
Current methods for producing L-ascorbate-2-phosphate, such as chemical synthesis, are energy-intensive, environmentally toxic, and do not meet the requirements for green, safe, and sustainable production, prompting the need for an efficient biological preparation method.
Innovation Solution
A mutant of acid phosphatase with specific amino acid sequence mutations, particularly at sites 57, 58, 94, and 135, is used to catalyze the production of L-ascorbate-2-phosphate from L-ascorbic acid, enhancing catalytic efficiency and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis method is used to produce L-ascorbate-2-phosphate, then production yield is high, but energy consumption is large and environmental toxicity occurs
Solution Approach 1:
The patent applies parameter changes by modifying the enzyme's amino acid sequence at specific positions (57, 58, 94, and 135) to optimize catalytic activity. The mutant acid phosphatase exhibits improved enzymatic parameters including higher specific activity and optimal activity at pH 4.0-4.2 and temperature 30-37°C, enabling efficient biological synthesis that reduces energy consumption compared to chemical methods while maintaining high productivity
Solution Approach 2:
The patent replaces the chemical synthesis mechanism with an enzyme-catalyzed biological mechanism. The acid phosphatase enzyme from Pseudomonas aeruginosa catalyzes the phosphorylation of L-ascorbic acid at the C2 position, substituting harsh chemical reagents and high-energy processes with a mild, selective biological catalysis system that reduces energy consumption and environmental impact
2Productivity
If chemical synthesis method is used to produce L-ascorbate-2-phosphate, then production yield is high, but environmental toxicity occurs
Solution Approach 1:
The patent replaces the chemical synthesis mechanism with an enzyme-catalyzed biological mechanism. The acid phosphatase enzyme from Pseudomonas aeruginosa catalyzes the phosphorylation of L-ascorbic acid at the C2 position, substituting harsh chemical reagents and high-energy processes with a mild, selective biological catalysis system that reduces energy consumption and environmental impact
Solution Approach 2:
The patent employs a self-service approach where the enzyme system performs the synthesis function inherently. The acid phosphatase enzyme naturally catalyzes the phosphorylation reaction under mild conditions (pH 4.0-4.2, temperature 30-37°C), eliminating the need for toxic catalysts, solvents, and extreme conditions required in chemical synthesis, thereby achieving green production with high productivity
3Object-affected harmful factors
If wild type acid phosphatase is used for enzyme conversion, then environmental friendliness is maintained, but catalytic efficiency is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the enzyme's amino acid sequence at specific positions (57, 58, 94, and 135) to optimize catalytic activity. The mutant acid phosphatase exhibits improved enzymatic parameters including higher specific activity and optimal activity at pH 4.0-4.2 and temperature 30-37°C, enabling efficient biological synthesis that reduces energy consumption compared to chemical methods while maintaining high productivity
Solution Approach 2:
The patent replaces the chemical synthesis mechanism with an enzyme-catalyzed biological mechanism. The acid phosphatase enzyme from Pseudomonas aeruginosa catalyzes the phosphorylation of L-ascorbic acid at the C2 position, substituting harsh chemical reagents and high-energy processes with a mild, selective biological catalysis system that reduces energy consumption and environmental impact
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 acid phosphatase achieves a yield of L-ascorbate-2-phosphate reaching 90.1 g/L with a molar yield of 75.1%, accelerating the industrialization of enzyme conversion methods for its production.
Implementation Method 1
acid phosphatase, which has a broad substrate spectrum and can catalyze L-ascorbic acid for phosphorylation of site C2 thereof, to form L-ascorbate-2-phosphate
Implementation Method 2
catalyze L-ascorbic acid for phosphorylation of site C2 thereof, to form L-ascorbate-2-phosphate
Data Source
AI summary
Disclosed is an acid phosphatase mutant obtained from Pseudomonas aeruginosa having the amino acid sequence of SEQ ID NO:3 and method of using the mutant in the technical field of biological engineering. The disclosure provides a mutant of acid phosphatase PaAPaseMu3. By expressing the mutant of acid phosphatase PaAPaseMu3 in Escherichia coli and using a whole-cell conversion method, L-ascorbic acid is transformed into L-ascorbate-2-phosphate. Moreover, the problems of a high substrate cost, environmental pollution and the like are greatly reduced, laying a foundation for the industrial green production of L-ascorbate-2-phosphate.