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A Novel Genetic Engineering Approach for DON Detoxification Using a Yeast-Based Multi-Enzyme System.

Rong Li1,2, Jia Song2, Bo Sun2

  • 1Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China.

Biology
|April 27, 2026
PubMed
Summary
This summary is machine-generated.

A genetically engineered yeast strain was developed to detoxify deoxynivalenol (DON), a harmful mycotoxin found in food. The engineered yeast successfully reduced DON levels by 13.98%, offering a promising biological solution for food safety.

Keywords:
Saccharomyces cerevisiaegenetically engineered yeastpyrroloquinoline quinone (PQQ)toxin detoxification

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Area of Science:

  • Biotechnology
  • Food Safety
  • Microbiology

Background:

  • Deoxynivalenol (DON) is a carcinogenic mycotoxin prevalent in cereals and food products, posing significant health risks.
  • Effective detoxification strategies are crucial for ensuring food and feed safety.

Purpose of the Study:

  • To develop a genetically engineered *Saccharomyces cerevisiae* strain for deoxynivalenol (DON) detoxification.
  • To establish a proof-of-concept yeast cell factory for mycotoxin bioremediation.

Main Methods:

  • Engineered *Saccharomyces cerevisiae* to co-express *YTDepA* and *YTDepB* detoxification genes from *Youhaiella tibetensis*.
  • Integrated the pyrroloquinoline quinone (PQQ) biosynthesis gene cluster from *Klebsiella pneumoniae* for cofactor supply.
  • Verified gene expression using qRT-PCR and Western blot; confirmed DON detoxification via HPLC-MS.

Main Results:

  • The recombinant yeast strain achieved a significant 13.98% detoxification of DON after 72 hours of fermentation (p < 0.05).
  • The strain expressing only the PQQ cluster showed no DON detoxification activity, confirming the efficacy of the introduced detoxification genes.
  • Successful co-expression of detoxification genes and PQQ biosynthesis pathway was validated.

Conclusions:

  • An integrated yeast cell factory was successfully established for DON detoxification.
  • This study provides a foundation for future optimization of yeast-based mycotoxin bioremediation strategies.
  • Highlights limitations and future research directions for enhanced detoxification efficiency.