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Related Concept Videos

RNA Editing02:23

RNA Editing

RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
RNA Stability01:53

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 Stability01:53

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-seq03:21

RNA-seq

RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...

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Updated: Jun 13, 2026

A Nonsequencing Approach for the Rapid Detection of RNA Editing
08:50

A Nonsequencing Approach for the Rapid Detection of RNA Editing

Published on: April 21, 2022

Molecular diversity through RNA editing: a balancing act.

Sanaz Farajollahi1, Stefan Maas

  • 1Department of Biological Sciences, Lehigh University, Bethlehem, PA 18015, USA.

Trends in Genetics : TIG
|April 17, 2010
PubMed
Summary

RNA editing, a process involving adenosine deamination, generates diverse RNA and protein products in eukaryotes. Maintaining proper RNA editing levels is crucial, as imbalances can lead to human diseases.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Adenosine deamination is a key RNA editing mechanism in eukaryotes, particularly in higher organisms.
  • This process generates significant RNA and protein diversity through modifications in coding exons, repeat elements, and microRNAs.
  • These modifications influence amino acid sequences, alternative splicing, and gene expression.

Purpose of the Study:

  • To highlight the role of adenosine-to-inosine (A-to-I) RNA editing in generating molecular diversity.
  • To underscore the critical importance of balanced RNA editing levels for normal cellular function.
  • To establish the link between dysregulated RNA editing and human disease phenotypes.

Main Methods:

  • The study reviews existing literature on RNA editing mechanisms and their functional consequences.
  • It synthesizes findings on the prevalence and impact of adenosine-to-inosine (A-to-I) editing.
  • The review discusses the implications of transcriptome instability due to aberrant RNA editing.

Main Results:

  • Adenosine deamination (A-to-I editing) is a major source of RNA and protein diversity in eukaryotes.
  • RNA editing impacts translated exons, retrotransposons, and microRNAs, affecting protein function and gene regulation.
  • The functional consequences of many A-to-I editing events remain to be fully elucidated.

Conclusions:

  • Maintaining precise control over RNA editing levels is essential for cellular homeostasis.
  • Transcriptome instability arising from excessive, insufficient, or misdirected RNA editing is implicated in various human diseases.
  • Further research is needed to fully understand the scope and impact of A-to-I editing across the transcriptome.