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Published on: April 18, 2014
Intron location and sequence modulate gene expression in Yarrowia lipolytica.
Qi Qi1,2, Pedro Tomaz da Silva3,4, Vasileios Vangalis1,2
1Centre of Microbial and Plant Genetics (CMPG), Department of Microbial and Molecular Systems (M2S), KU Leuven, Leuven 3000, Belgium.
Nucleic Acids Research
|June 27, 2026
Summary
Researchers identified key intron features that regulate gene expression in Yarrowia lipolytica. These findings enable precise control of gene expression for microbial cell factories.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- Introns are prevalent in eukaryotic genomes and often correlate with higher gene expression.
- The specific intron features that influence gene expression are not well understood.
- Yarrowia lipolytica is a valuable oleaginous yeast for industrial applications.
Purpose of the Study:
- To systematically characterize the intron landscape of Yarrowia lipolytica.
- To identify intron features that impact splicing efficiency and gene expression.
- To explore the potential of introns as regulatory elements in microbial cell factories.
Main Methods:
- Transcriptome analysis across 12 diverse environments.
- Identification and annotation of introns and intron-containing genes.
- Linear regression modeling to correlate intron features with gene expression levels.
- Reporter gene assays to test the regulatory effects of selected introns.
Main Results:
- 2421 introns identified in 1430 genes, including 1302 novel introns.
- Intron-containing genes showed higher and more stable expression across conditions.
- Six key intron features (splice motifs, branch point, GC content, size) were found to influence expression.
- A predictive model demonstrated introns can modulate reporter gene expression up to 200-fold.
- A novel intron (I3) was identified that significantly enhances gene expression and protein production.
Conclusions:
- Intron features significantly influence splicing efficiency and gene expression.
- Introns can be effectively utilized as tunable regulatory elements in Yarrowia lipolytica.
- These findings offer new strategies for optimizing gene expression in microbial cell factories.
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