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PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
Published on: July 2, 2010
The RNA binding protein Pub1 modulates the stability of transcripts containing upstream open reading frames
M J Ruiz-Echevarría1, S W Peltz
1Department of Molecular Genetics and Microbiology, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway 08854, USA. ruizeche@umdnj.edu
Cell
|July 13, 2000
Summary
Nonsense-mediated decay (NMD) targets transcripts with upstream open reading frames (uORFs). However, a stabilizer element (STE) in some mRNAs, interacting with Pub1 protein, prevents NMD, regulating gene expression.
Area of Science:
- Molecular Biology
- RNA Biology
- Gene Regulation
Background:
- The nonsense-mediated mRNA decay (NMD) pathway degrades transcripts with premature stop codons.
- Upstream open reading frames (uORFs) in the 5'-untranslated region can trigger NMD, but some transcripts evade this degradation.
- Understanding the mechanisms of NMD resistance in uORF-containing transcripts is crucial for gene regulation.
Purpose of the Study:
- To investigate the mechanisms by which certain uORF-containing mRNAs resist NMD.
- To identify factors that modulate the stability of transcripts with uORFs.
- To elucidate the role of the RNA-binding protein Pub1 in NMD regulation.
Main Methods:
- Analysis of GCN4, YAP1, and CPA1 mRNA sequences and structures.
- Investigating the interaction between the stabilizer element (STE) and the RNA-binding protein Pub1.
- Assessing the impact of STE and Pub1 on NMD pathway activity.
Main Results:
- GCN4 and YAP1 mRNAs, containing uORFs, possess a stabilizer element (STE).
- The STE interacts with the RNA-binding protein Pub1, conferring resistance to NMD.
- CPA1 mRNA, lacking an STE, is degraded by the NMD pathway, highlighting the role of STE in transcript stability.
Conclusions:
- Upstream open reading frames (uORFs) are critical regulators of both translation and mRNA turnover.
- The stabilizer element (STE) and its interaction with Pub1 are key determinants of NMD resistance in uORF-containing transcripts.
- Pub1 is a critical factor modulating the stability of uORF-containing mRNAs, impacting gene expression regulation.
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