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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
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Genetic variants affecting RNA stability influence complex traits and disease risk.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Bioinformatics

Background:

  • Gene expression is regulated by both transcription and mRNA stability.
  • The role of mRNA stability in genetic variation is often overlooked.
  • Understanding allele-specific regulation is crucial for disease research.

Purpose of the Study:

  • To identify and characterize allele-specific RNA stability (asRS) variants.
  • To explore the mechanisms underlying mRNA stability regulation.
  • To investigate the link between asRS variants and immune-related diseases.

Main Methods:

  • Utilized metabolic labeling data (Bru/BruChase-seq) and the RNAtracker computational pipeline.
  • Categorized genes into allele-specific RNA stability or transcription events.
  • Employed massively parallel screening (MapUTR) and CRISPR prime editing to identify causal asRS variants.

Main Results:

  • Identified over 5,000 asRS variants in 665 genes across 11 human cell lines.
  • Found overlap of asRS variants with microRNA target regions and RNA-binding protein sites.
  • asRS genes are significantly enriched in immune-related pathways and linked to immune disease risk.

Conclusions:

  • RNA stability is a critical mechanism linking genetic variation to disease.
  • This study highlights the underappreciated role of mRNA stability in genetic studies.
  • The findings provide a new perspective on the genetic basis of immune disorders.