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RNA-Seq Analysis Reveals Localization-Associated Alternative Splicing across 13 Cell Lines.
Chao Zeng1,2, Michiaki Hamada1,2,3,4
1AIST-Waseda University Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), Tokyo 169-8555, Japan.
Genes
|July 26, 2020
Summary
Alternative splicing impacts where RNA is located within cells. This study reveals how specific intron features and RNA-binding proteins influence RNA
Area of Science:
- Molecular Biology
- Genomics
- Cell Biology
Background:
- Alternative splicing generates biological diversity from individual genes.
- Most research focuses on alternative splicing's effect on protein synthesis.
- The impact of alternative splicing on RNA subcellular localization is understudied.
Purpose of the Study:
- To investigate the transcriptome-wide influence of alternative splicing on RNA subcellular localization.
- To identify genes and regulatory mechanisms involved in RNA localization changes due to alternative splicing.
Main Methods:
- Analysis of RNA-sequencing data from subcellular fractions across 13 human cell lines.
- Identification of genes exhibiting altered RNA localization between the nucleus and cytoplasm.
- Correlation analysis of intron characteristics (length, stability) with nuclear localization.
- Motif analysis to identify RNA-binding proteins associated with specific introns.
Main Results:
- Identified 8720 genes with altered RNA localization between the nucleus and cytoplasm.
- Confirmed enrichment of intron retention in nuclear transcript variants.
- Found a positive correlation between short, structurally stable introns and nuclear localization.
- Identified 14 RNA-binding proteins preferentially binding to these introns.
Conclusions:
- Alternative splicing plays a significant role in regulating RNA subcellular localization.
- Intron features and RNA-binding protein interactions are key determinants of RNA localization.
- This study provides the first transcriptome-wide analysis of alternative splicing's effect on RNA localization.
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