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Characterizing of functional human coding RNA editing from evolutionary, structural, and dynamic perspectives.

Oz Solomon1, Lily Bazak, Erez Y Levanon

  • 1Cancer Research Center, Chaim Sheba Medical Center, Tel Hashomer, 52621, Ramat Gan, Israel; The Everard & Mina Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 52900, Israel.

Proteins
|August 20, 2014
PubMed
Summary

RNA editing modifies protein sequences, with specific amino acid changes like stop-to-tryptophan and charge alterations. Low-frequency editing sites often destabilize protein structure, while high-frequency sites can be functionally critical.

Keywords:
ADARRNA editingRNA modificationRNA-seqprotein structure analysisthermostability

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Area of Science:

  • Molecular Biology
  • Genomics
  • Bioinformatics

Background:

  • Adenosine-to-Inosine (A-to-I) RNA editing is prevalent in the human transcriptome.
  • Few known editing sites alter protein amino acid sequences.

Purpose of the Study:

  • Investigate structural and functional preferences of coding RNA editing.
  • Identify novel functional coding RNA editing sites.

Main Methods:

  • Utilized high-throughput sequencing data.
  • Employed variant prediction tools and protein structural analysis.
  • Developed a pipeline to identify and assess coding RNA editing sites.

Main Results:

  • RNA editing exhibits distinct amino acid change patterns (e.g., stop-to-tryptophan, charge changes).
  • Editing has a significant structural impact, varying with editing frequency and site conservation.
  • Identified novel potential functional coding editing sites in COPA, GIPC1, ZN358, and CCNI genes.

Conclusions:

  • Coding RNA editing influences protein structure and function in specific, predictable ways.
  • Editing site frequency correlates with its predicted impact on protein stability and conservation.
  • The study provides a framework for discovering functionally important coding RNA editing events.