Diatom Ovothiol Biosynthesis via Enzymatic Engineering
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Solution Overview
Problem
Current methods for producing ovothiols are cumbersome, expensive, and environmentally unfriendly, with chemical synthesis procedures being time-consuming and sea urchins being an unsustainable source for large-scale production.
Innovation Solution
Development of a protocol for enzymatic engineering of the diatom species Phaeodactylum tricornutum to overexpress the biosynthetic enzyme for ovothiol production, using bacterial conjugation or biolistic methods to introduce the 5-histidylcysteine sulfoxide synthase OvoA enzyme, enabling eco-sustainable and cost-effective production of ovothiols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis procedures are used to produce ovothiols, then the production process can be controlled, but the process becomes time-consuming and expensive
Solution Approach 1:
The patent uses genetically modified diatoms that autonomously produce ovothiols through their own metabolic pathways. The microalgae cells serve as living factories that self-regulate the biosynthesis process, eliminating the need for manual chemical synthesis steps and significantly reducing production time while maintaining control over the production process.
Solution Approach 2:
The patent replaces mechanical/chemical synthesis systems with a biological system. Instead of using chemical reagents and multi-step synthesis protocols, the invention employs genetically engineered microorganisms that naturally produce ovothiols through enzymatic reactions, thereby reducing both time and complexity of the production process.
2Reliability
If sea urchins are used as a source for ovothiol extraction, then natural ovothiols can be obtained, but the method is unsustainable for large-scale production
Solution Approach 1:
The patent creates a copy of the ovothiol production capability by transferring the biosynthetic genes into diatom cells. Instead of extracting ovothiols from sea urchins, the invention replicates the production mechanism in a more scalable host organism, maintaining the reliability of natural ovothiol production while enabling large-scale cultivation through controlled diatom growth.
Solution Approach 2:
The patent changes the biological parameters of the production system by switching from sea urchin extraction to diatom cultivation. This parameter change includes using organisms with faster reproduction rates and higher biomass yield, thereby increasing productivity and scalability while maintaining the quality and reliability of natural ovothiol production.
3Object-affected harmful factors
If enzymatic engineering of diatoms is implemented, then eco-sustainable production is achieved, but the genetic modification process adds complexity
Solution Approach 1:
The patent extracts and isolates the specific biosynthetic genes responsible for ovothiol production and transfers them into diatoms. By taking out only the essential genetic elements needed for ovothiol synthesis, the invention achieves eco-sustainable production without requiring complex whole-organism genetic改造工程, thereby reducing overall system complexity while eliminating toxic side compounds associated with chemical synthesis.
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 approach results in higher productivity and scalability of ovothiol production, avoiding toxic side compounds and preserving natural populations, making ovothiols more accessible for pharmaceutical, nutraceutical, and cosmeceutical applications.
Implementation Method 1
The key enzyme involved in ovothiol biosynthesis is a bifunctional enzyme, which catalyzes the formation of the oxidative C-S bond, which results in the net sulfur transfer from cysteine to position 5 of histidine. In detail, the enzyme 5-histidylcysteine sulfoxide synthase (OvoA) catalyzes the formation of the 5-histidyl-cysteine sulfoxide conjugate from cysteine and histidine
Implementation Method 2
Subsequently, a pyridoxal phosphate (PLP)-dependent lyase (OvoB) cleaves this intermediate product to generate 5-thiohistidine
Implementation Method 3
Then, OvoA catalyzes the methylation at the imidazole ring to produce ovothiol A
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5G
AI summary
The present invention relates to the field of biotechnology, in particular it relates to the set-up of a protocol of enzymatic engineering of the diatom species Phaeodactylum tricornutum to overexpress the biosynthetic enzyme leading to ovothiol production. This protocol is eco-sustainable because it uses cells and nutrients for biosynthesis and does not produce toxic side-compounds. Microalgal biomass moreover can be exploited for additional uses after ovothiol extraction, making the production process more cost-effective. The production of ovothiols is relevant for the pharmaceutical, nutraceutical, and cosmeceutical sectors.