Microbial Taurine Production via Lipid Bilayer Encapsulation
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Solution Overview
Problem
There is a need for an effective and economical method to produce taurine in aquaculture that prevents its dissolution in water, avoiding the use of plant-based biosynthesis or live feeds, and ensuring taurine is available as a stable feedstock for larval fish.
Innovation Solution
Non-naturally occurring microorganisms are engineered to produce taurine by expressing specific exogenous enzymes, which are then encapsulated in a natural lipid bilayer to form a stable feed for aquaculture, ensuring taurine is protected from water dissolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If chemically synthesized taurine in crystalline form is used in aquaculture feed, then taurine can be provided as a feed supplement, but it dissolves in water and is lost due to dissipation
Solution Approach 1:
The patent encapsulates taurine within microbial cell membranes, which act as flexible lipid bilayer shells. This encapsulation prevents taurine from dissolving in water while maintaining its biological availability to aquatic organisms, directly resolving the contradiction between providing taurine supplementation and preventing its dissipation.
Solution Approach 2:
The microbial cell membrane serves as an intermediary carrier that protects taurine from direct contact with water. The engineered microorganisms incorporate taurine into their cellular structure, and when consumed by aquatic organisms, the taurine is released through natural cellular processes, preventing water-based dissipation.
2Ease of manufacture
If plant-based production systems are used to produce taurine, then taurine can be produced biologically, but anti-nutritional factors in plant-based feeds reduce effectiveness
Solution Approach 1:
The patent uses microorganisms as temporary, disposable production systems. The engineered microbes are grown, produce taurine, and then the entire microbial biomass is fed to aquatic organisms. This eliminates the need for long-term plant cultivation and avoids plant-based anti-nutritional factors, while maintaining economical biological production.
Solution Approach 2:
The invention changes the biological production system from plant-based to microorganism-based. By switching the producer organism type, the patent eliminates anti-nutritional factors while maintaining the advantages of biological production, thereby improving feed effectiveness without sacrificing manufacturing ease.
3Quantity of substance
If live feeds enriched with taurine are used, then taurine can be provided to larval fish, but live feeds are expensive
Solution Approach 1:
The patent extracts the essential function of live feeds (taurine delivery) and separates it from the expensive live feed matrix. By producing taurine in microorganisms and using the entire microbial biomass as feed, the system delivers taurine without requiring costly live feed organisms, achieving cost-effective taurine supplementation.
Solution Approach 2:
The engineered microorganisms serve multiple functions: they produce taurine, provide protein nutrition, and act as the feed vehicle itself. This multi-functionality eliminates the need for separate expensive live feed systems while maintaining effective taurine delivery to larval fish.
4Productivity
If microbial organisms are engineered to produce taurine, then taurine can be produced economically, but requiring exogenous enzyme expression increases system complexity
Solution Approach 1:
The patent divides the taurine biosynthesis pathway into discrete enzymatic steps and introduces specific genes encoding these enzymes into the microbial host. This segmentation allows for targeted genetic modification to achieve taurine production, balancing productivity enhancement with manageable engineering complexity.
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 method provides a stable and cost-effective taurine feed for aquaculture, enhancing taurine availability and preventing loss, thereby supporting healthy growth and reducing the reliance on expensive live feeds or chemical synthesis.
Implementation Method 1
expressing exogenous enzyme(s) for production of taurine
Implementation Method 2
encapsulated in a natural lipid bilayer to form a stable feed for aquaculture, ensuring taurine is protected from water dissolution
Data Source
AI summary
Non-naturally occurring microorganisms are provided that produce taurine and/or taurine precursors, e.g., hypotaurine, sulfoacetaldehyde, or cysteate, utilizing exogenously added enzyme activities. Methods of producing taurine and/or taurine precursors in microbial cultures, and feed and nutritional supplement compositions that include taurine and/or taurine precursors produced in the microbial cultures, such as taurine- and/or taurine precursor-containing biomass, are also provided.