Evolution of mRNA Decay Mechanisms in Eukaryotes and Archaea
Author Information
Author(s): Gemma C Atkinson, Sandra L Baldauf, Vasili Hauryliuk
Primary Institution: Department of Biology, University of York
Hypothesis
We hypothesize that the last common ancestor of eukaryotes and archaea possessed Dom34p-mediated no-go decay (NGD).
Conclusion
The study suggests that mRNA decay mechanisms have evolved through gene duplications of eRF1 and eRF3, with distinct roles in translation termination and quality control.
Supporting Evidence
- Extensive BLAST searches confirm that Hbs1p and eRF3 are limited to eukaryotes.
- Dom34p and eRF1 are universal in eukaryotes and archaea.
- Ski7p appears to be restricted to a subset of Saccharomyces species.
Takeaway
This study looks at how certain proteins help cells deal with faulty messages in their genetic instructions, showing that these helpers have changed over time.
Methodology
The study used sequence similarity searching, multiple sequence alignment, and phylogenetic analysis to examine the evolution of eRF1 and eRF3 families.
Limitations
The study is limited to mechanisms involving factors derived from eukaryotic and archaeal class-1 and class-2 release factor families.
Digital Object Identifier (DOI)
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