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Related Experiment Videos

Intron requirement for AFP gene expression in Trichoderma viride.

Jun Xu1, Zhen Zhen Gong1

  • 1State Key Laboratory of Molecular Biology, Box 16, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, PR China.

Microbiology (Reading, England)
|November 6, 2003
PubMed
Summary

Introns are essential for Aspergillus giganteus antifungal protein (AFP) gene expression in Trichoderma viride. This study reveals introns play a crucial role in mRNA accumulation and gene expression in filamentous fungi.

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Area of Science:

  • Molecular Biology
  • Mycology
  • Genetics

Background:

  • Gene expression regulation in filamentous fungi is not fully understood.
  • The role of introns in gene expression varies across eukaryotes.
  • Filamentous fungi possess unique splicing mechanisms.

Purpose of the Study:

  • To investigate the role of introns in the expression of the Aspergillus giganteus antifungal protein (AFP) gene in Trichoderma viride.
  • To determine if introns are required for mRNA accumulation and protein production.
  • To explore the potential novel function of introns in filamentous fungal gene expression.

Main Methods:

  • Gene fusion of the AFP gene (with and without introns) to the Aspergillus nidulans trpC promoter and terminator.
  • Transformation of the constructed vectors into Trichoderma viride.

Related Experiment Videos

  • Analysis of spliced mRNA accumulation using molecular techniques.
  • Confirmation of expression at the protein level.

    • Main Results:

    • The AFP gene with introns produced detectable levels of spliced mRNA in T. viride.
    • An intronless derivative of the AFP gene showed no mRNA accumulation.
    • Protein expression correlated with mRNA accumulation, confirming the necessity of introns.
    • This suggests a novel intron-dependent expression mechanism in filamentous fungi.

    Conclusions:

    • Introns are required for functional AFP gene expression in T. viride.
    • Small introns in filamentous fungi may significantly impact gene expression by influencing mRNA accumulation.
    • This finding offers new insights into intron function and intron-dependent evolution in fungi.