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Ribonucleobase Oxidation and Ribonucleases Involved in the Degradation of Oxidized RNA.

Dagoberto Grijalva-Flores1, Marino J E Resendiz1

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Oxidized RNA is linked to disease and biological processes. This review highlights ribonucleases that degrade oxidized RNA, focusing on 8-oxoG, and suggests other proteins may also be involved.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Biology

Background:

  • RNA oxidation is implicated in disease development, apoptosis, aging, and signaling.
  • Various RNA types (rRNA, tRNA, miRNA, mRNA, mtRNA) can be oxidized in vivo.
  • Reactive oxygen species (ROS) cause RNA oxidation from both internal and external sources.

Purpose of the Study:

  • To review ribonucleases involved in the enzymatic degradation of oxidized RNA.
  • To discuss the processing of oxidized RNA, including the common 8-oxoG modification.
  • To explore potential roles of other proteins in handling oxidized RNA.

Main Methods:

  • Literature review focusing on ribonucleases and oxidized RNA degradation.
  • Analysis of studies on enzymatic processing of oxidized RNA.
  • Discussion of various oxidized RNA species and modifications.

Main Results:

  • Enzymatic degradation by ribonucleases is a primary mechanism for processing oxidized RNA.
  • 8-oxo-7,8-dihydroguanosine (8-oxoG) is a prevalent oxidized RNA modification.
  • Other canonical nucleosides and natural modifications can also be oxidized.

Conclusions:

  • Enzymatic degradation is likely the main pathway for oxidized RNA processing.
  • Proteins like helicases and export proteins may play roles in oxidized RNA management.
  • The field of oxidized RNA handling presents significant opportunities for future research.