Related Experiment Video

Updated: Apr 30, 2026

RNAi-mediated Control of Aflatoxins in Peanut: Method to Analyze Mycotoxin Production and Transgene Expression in the Peanut/Aspergillus Pathosystem
09:44

RNAi-mediated Control of Aflatoxins in Peanut: Method to Analyze Mycotoxin Production and Transgene Expression in the Peanut/Aspergillus Pathosystem

Published on: December 21, 2015

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Transcriptome Sequencing Revealed an Inhibitory Mechanism of Recombinant Puroindoline B Protein on Aspergillus flavus

Pingping Tian1, Cuixiang Li2, Yangyong Lv2

  • 1College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China.

Foods (Basel, Switzerland)
|June 13, 2025
PubMed

Insights

Recombinant Puroindoline B protein (rPINB) inhibits Aspergillus flavus growth by affecting cell wall and membrane functions. Two specific MFS transporter genes, mfs1 and mfs2, were identified as critical for rPINB

Area of Science:

  • Mycology
  • Molecular Biology
  • Food Safety

Background:

  • Aspergillus flavus is a significant food contaminant causing health and economic losses.
  • Recombinant Puroindoline B protein (rPINB) previously demonstrated inhibitory effects on A. flavus.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying rPINB's inhibition of A. flavus using transcriptome analysis.
  • To identify specific genes responsible for A. flavus sensitivity to rPINB.

Main Methods:

  • Transcriptome sequencing (RNA-Seq) to identify differentially expressed genes (DEGs) in A. flavus treated with rPINB.
  • Construction and analysis of gene deletion strains for key identified genes (mfs1 and mfs2).

Main Results:

  • RNA-Seq revealed DEGs involved in cell wall synthesis, membrane transport, oxidative stress, sporulation, and aflatoxin production.
  • Deletion mutants of mfs1 and mfs2 showed reduced sensitivity to rPINB, with impaired growth, altered morphology, and decreased AFB1 production.
  • Mutants exhibited reduced tolerance to cell membrane, osmotic, and oxidative stress agents.

Conclusions:

  • The MFS transporter genes mfs1 and mfs2 are essential for rPINB's inhibitory action against A. flavus.
  • Understanding these mechanisms provides a basis for developing novel mold control strategies using plant-derived proteins.
Keywords:
Aspergillus flavusPuroindoline B proteinRNA-seqmajor facilitator superfamily transporters

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