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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-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...
Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...

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Related Experiment Video

Updated: Jun 15, 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

Sequence based identification of RNA editing sites.

Eli Eisenberg1, Jin Billy Li, Erez Y Levanon

  • 1Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel Aviv, Israel.

RNA Biology
|March 11, 2010
PubMed
Summary

RNA editing expands the human transcriptome. Genomics and computational analysis identify thousands of A-to-I editing sites, primarily in genomic repeats, advancing our understanding of RNA modifications.

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Last Updated: Jun 15, 2026

A Nonsequencing Approach for the Rapid Detection of RNA Editing
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RNA Catalyst as a Reporter for Screening Drugs against RNA Editing in Trypanosomes
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Area of Science:

  • Molecular Biology
  • Genomics
  • Bioinformatics

Background:

  • RNA editing is a crucial post-transcriptional mechanism that diversifies the transcriptome.
  • The human transcriptome contains a vast array of RNA editing events, significantly expanding the proteomic and functional repertoire beyond the genome.
  • Recent advancements have highlighted the importance of RNA editing in various biological processes.

Purpose of the Study:

  • To review recent advancements in the identification and characterization of RNA editing sites in the human transcriptome.
  • To emphasize the principles underlying the computational and genomics-based methods used for RNA editing discovery.
  • To discuss potential future directions for extending these analytical methodologies.

Main Methods:

  • Genomic and computational sequence analysis strategies.
  • High-throughput transcriptome sequencing and data analysis.
  • Comparative genomics and bioinformatics approaches for site identification.

Main Results:

  • Identification of thousands of adenosine-to-inosine (A-to-I) RNA editing sites within human genomic repeats.
  • Discovery of several hundred A-to-I RNA editing sites located outside of repetitive genomic regions.
  • Characterization of RNA editing patterns and their prevalence across the human transcriptome.

Conclusions:

  • Genomics and computational sequence analysis are powerful tools for RNA editing research.
  • RNA editing, particularly A-to-I editing, significantly contributes to transcriptome diversity.
  • Further development of analytical methods will enhance the discovery and understanding of RNA editing events.