Enzymatic Retinyl Ester Production via Acyltransferase
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Solution Overview
Problem
Current chemical production methods for retinoids, including vitamin A, are inefficient due to high energy consumption, complex purification steps, and the production of undesirable by-products, while biological systems produce retinoids at low levels and with instability, making commercial-scale isolation impractical.
Innovation Solution
A novel enzymatic process using acyltransferase enzymes to convert retinol into retinyl esters, particularly long chain retinyl esters, in a carotenoid-producing host cell, such as a fungal host cell, which enhances productivity and specificity by expressing heterologous acyltransferases like DGATs and ARATs, optimizing the conversion rate to at least 20% long chain retinyl esters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical production methods are used for retinoids, then production capacity is sufficient, but energy consumption is high and purification steps are complicated
Solution Approach 1:
The patent replaces chemical production methods with a biological system (microorganism-based enzymatic conversion) to produce retinyl esters. This substitution eliminates the need for high-energy chemical reactions and complex purification steps while maintaining production capacity, directly resolving the contradiction between productivity and energy consumption.
2Productivity
If chemical production methods are used for retinoids, then production capacity is sufficient, but purification steps are complicated
Solution Approach 1:
The patent replaces chemical production methods with a biological system that naturally produces retinyl esters with high specificity. The microorganism-based system converts beta-carotene to retinol and then to retinyl esters through endogenous enzymes, eliminating the need for complex chemical purification steps while maintaining production capacity.
3Use of energy by stationary object
If biological systems are used for retinoid production, then energy consumption is reduced, but production levels are low and instability occurs
Solution Approach 1:
The patent optimizes multiple parameters of the biological system including: selecting specific microorganism strains with high retinoid production capability, optimizing culture conditions (temperature, pH, nutrients), enhancing enzyme activity through genetic modification, and controlling the conversion pathway from beta-carotene to retinyl esters. These parameter changes collectively increase production levels while maintaining low energy consumption and high stability.
4Use of energy by stationary object
If biological systems are used for retinoid production, then energy consumption is reduced, but product specificity is low and by-products are high
Solution Approach 1:
The patent enhances product specificity by optimizing the enzymatic conversion pathway parameters. Specific enzymes are selected and optimized to catalyze the conversion of retinol to retinyl esters with high specificity, minimizing by-product formation. The culture conditions and substrate composition are adjusted to favor the desired reaction pathway, achieving high manufacturing precision while maintaining low energy consumption.
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
This process improves the productivity and specificity of retinyl ester production, reducing by-product formation and energy consumption, enabling more economical and ecological production of vitamin A and its precursors, with a high percentage of trans-isoforms, thus addressing the limitations of existing methods.
Implementation Method 1
a novel enzymatic process using acyltransferase enzymes to convert retinol into retinyl esters
Implementation Method 2
conversion of retinol into retinyl long chain esters via conversion of retinol
Data Source
AI summary
The present invention is related to a novel enzymatic process for production of retinyl esters, such as in particular retinyl long chain esters, via conversion of retinol, which process includes the use of enzymes having acyltransferase activity. Said process might be used for biotechnological production of vitamin A.