De-epoxidase Enzyme Detoxifies Vomitoxin in Transgenic Plants
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Solution Overview
Problem
Current methods lack a specific gene or protein capable of efficiently detoxifying vomitoxin by removing its epoxy group, posing a challenge in food and feed safety due to the toxin's harmful effects on human and animal health.
Innovation Solution
A nucleic acid molecule encoding a de-epoxidation proteinic enzyme is introduced into plants through transgenesis, enabling the removal of epoxy groups from vomitoxin, thereby reducing its toxicity. This enzyme catalyzes a reaction between the epoxy group of vomitoxin and glutathione to produce a glutathionylated derivative, effectively detoxifying the toxin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no specific gene or protein is available for epoxy group removal, then vomitoxin detoxification cannot be achieved, but introducing transgenic methods increases device complexity
Solution Approach 1:
The patent utilizes the plant's own endogenous glutathione pool as a substrate for the introduced de-epoxidase enzyme. The enzyme catalyzes the reaction between vomitoxin epoxy groups and glutathione, producing glutathionylated derivatives. This self-service approach eliminates the need for external detoxification systems while achieving reliable vomitoxin detoxification through the plant's inherent metabolic resources.
2Object-affected harmful factors
If conventional methods are used without specific de-epoxidase enzymes, then the process remains simple, but vomitoxin toxicity cannot be effectively removed
Solution Approach 1:
The patent employs glutathione as an intermediary substance that mediates the detoxification reaction. The de-epoxidase enzyme facilitates the reaction between vomitoxin and glutathione, forming glutathionylated derivatives. This intermediary approach enables effective toxin removal through a biochemically compatible reaction pathway that occurs naturally in plant systems.
3Object-affected harmful factors
If the epoxy group is not removed from vomitoxin, then the toxin remains highly toxic, but removing it requires introducing foreign genes that may affect plant stability
Solution Approach 1:
The patent changes the chemical parameter of vomitoxin by removing its epoxy group through enzymatic catalysis. The de-epoxidase enzyme specifically targets and removes the epoxy functional group, transforming the toxin into a less toxic glutathionylated derivative. This parameter change approach effectively reduces cytotoxicity while using a single well-defined genetic intervention.
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 transgenic plants exhibit enhanced resistance to Fusarium head blight and stem base rot, and the detoxified vomitoxin reduces cytotoxicity, improving food and feed safety by minimizing the toxin's harmful effects on consumers.
Implementation Method 1
A nucleic acid molecule encoding a de-epoxidation proteinic enzyme is introduced into plants through transgenesis, enabling the removal of epoxy groups from vomitoxin, thereby reducing its toxicity. This enzyme catalyzes a reaction between the epoxy group of vomitoxin and glutathione to produce a glutathionylated derivative, effectively detoxifying the toxin.
Implementation Method 2
This enzyme catalyzes a reaction between the epoxy group of vomitoxin and glutathione to produce a glutathionylated derivative, effectively detoxifying the toxin.
Data Source
AI summary
Disclosed are a nucleic acid molecule, a polypeptide having epoxy group-removing catalytic activity and use thereof. According to the invention, by means of genetic engineering, the nucleic acid molecule encoding a de-epoxidation protein is expressed in a plant, so that an epoxy group of a trichothecene mycotoxin is removed, and the toxin amount in the plant is reduced. The polypeptide of the invention is capable of catalyzing a reaction between vomitoxin and glutathione under mild conditions to remove epoxy groups to produce a glutathionylated derivative.