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RNA Stability

RNA Stability

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...

RNA Stability

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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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The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
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Related Experiment Video

Updated: Mar 20, 2026

Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts

Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts

Published on: January 2, 2018

Genome stability versus transcript diversity.

Brian Magnuson¹, Karan Bedi², Mats Ljungman¹

¹Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, and Translational Oncology Program, University of Michigan, Ann Arbor, USA; Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, USA.

|June 2, 2016

Summary

This summary is machine-generated.

Our genome uses DNA repair to prevent mutations, but RNA processing allows for greater genetic diversity. This study explores mechanisms balancing genome protection with the generation of diverse transcripts and proteins.

Keywords:

DNA damage response DNA repair Polymerase fidelity Post-transcriptional RNA processing Protein translation Proteomic diversity RNA splicing RNA transcription

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Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms

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Published on: September 13, 2018

Area of Science:

Genetics
Molecular Biology
Genomics

Background:

The genome is protected by high-fidelity replication and DNA repair mechanisms.
Gene expression, including RNA and protein synthesis, introduces genetic diversity.
Evolutionary changes in splicing have increased transcript diversity.

Purpose of the Study:

To describe mechanisms that safeguard the genome.
To explain how translational diversity is promoted.
To emphasize the role of post-transcriptional RNA processing.

Main Methods:

Review of existing literature on genome stability.
Analysis of gene expression regulation pathways.
Focus on post-transcriptional RNA modification processes.

Main Results:

The genome balances mutation prevention with the generation of diverse transcripts.
Post-transcriptional RNA processing significantly contributes to proteome diversity.
Increased transcript diversity offers selective advantages.

Conclusions:

Mechanisms exist to protect the genome while promoting diversity.
Post-transcriptional RNA processing is key to generating a diverse transcriptome and proteome.
This balance is crucial for evolutionary adaptation.