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Programmed Deviations of Ribosomes From Standard Decoding in Archaea.

Federica De Lise1, Andrea Strazzulli2,3, Roberta Iacono1,2

  • 1Institute of Biosciences and BioResources - National Research Council of Italy, Naples, Italy.

Frontiers in Microbiology
|June 21, 2021
PubMed
Summary
This summary is machine-generated.

Translational recoding, where ribosomes alter gene translation rules, occurs across all life domains. This review focuses on Archaea, highlighting known recoding events and the need for further research into this underexplored area.

Keywords:
alpha-fucosidasearchaeaframeshiftingpyrrolysinerecodingselenocysteine

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Genetic code decoding is not always fixed, with ribosomes programmed to deviate from standard rules.
  • This phenomenon, known as translational recoding, includes stop codon readthrough, frameshifting, and ribosome bypassing.
  • Recoding mechanisms are well-understood in viruses, bacteria, and eukaryotes.

Purpose of the Study:

  • To review the current understanding of translational recoding in Archaea.
  • To highlight known and hypothesized recoding events in archaeal species.
  • To emphasize the need for further research into archaeal recoding.

Main Methods:

  • Literature review of translational recoding in Archaea.
  • Summarization of characterized recoding events, including selenocysteine and pyrrolysine decoding.
  • Identification of potential, yet unconfirmed, recoding events.

Main Results:

  • Translational recoding is known to regulate the decoding of selenocysteine and pyrrolysine in Archaea.
  • Only one instance of programmed -1 frameshifting has been confirmed in *Saccharolobus solfataricus* P2.
  • Several other putative recoding events in archaea remain unconfirmed and underexplored.

Conclusions:

  • Translational recoding plays a role in archaeal gene expression, particularly in decoding non-standard amino acids.
  • The study of recoding in Archaea is crucial for understanding their adaptation to extreme environments.
  • Further investigation is urgently needed to characterize recoding episodes and their regulated genes in Archaea.