Modified DON-Degrading Polypeptide for Grain-Safe Detoxification

The patent introduces a microbial enzyme system as an intermediary agent to degrade DON. Instead of directly applying harsh chemicals to grains, the invention uses microorganisms (bacteria or fungi) that produce enzymes capable of breaking down DON into less toxic compounds. This intermediary biological system mediates the detoxification process, achieving effective DON degradation while avoiding the direct harmful effects of chemical treatments on grain quality and safety.

The patent replaces chemical treatment mechanisms with biological enzymatic mechanisms. Rather than using chemical reactions involving ozone, ammonia, chlorine, hydrogen peroxide, or sodium bisulfite, the invention employs biological enzymes produced by microorganisms to catalyze the degradation of DON. This substitution of chemical mechanisms with biological mechanisms resolves the contradiction by maintaining degradation effectiveness while eliminating safety concerns and quality adverse effects associated with chemical methods.

The patent employs microorganisms as temporary, biodegradable agents for DON degradation. Unlike persistent chemical residues from sodium metabisulfite, the microbial system operates and then naturally degrades, leaving no harmful long-term residues. The microorganisms can be applied, perform their detoxification function, and then break down naturally, providing a safe alternative that maintains effectiveness without the safety concerns and regulatory prohibitions associated with sodium metabisulfite.

The patent substitutes the chemical mechanism of sodium metabisulfite with a biological enzymatic mechanism. Instead of relying on sulfite chemistry that raises safety concerns and leads to regulatory prohibitions, the invention uses microorganisms that produce enzymes to degrade DON. This biological substitution maintains high degradation efficiency while eliminating the safety concerns that led to Europe's prohibition of sodium metabisulfite for food-use grains.

The patent applies preliminary action by treating grains with DON-degrading microorganisms after contamination occurs but before the grains are processed or consumed. Rather than relying solely on preventive measures like pesticides or breeding that may be insufficient, this approach proactively addresses existing DON contamination by introducing enzymatic degradation capacity directly to the contaminated material, ensuring effective reduction of DON levels regardless of prevention failures.

The patent converts the harmful presence of DON in grains into a beneficial situation through enzymatic degradation. The microorganisms introduced specifically target and break down DON into less toxic compounds, transforming the contaminated state into a safe state. This approach takes the harmful contamination that occurs despite preventive measures and converts it into an opportunity for effective detoxification, thereby resolving the insufficiency of prevention-only approaches.