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The link between adjacent codon pairs and mRNA stability.

Yuriko Harigaya1, Roy Parker2

  • 1Department of Chemistry and Biochemistry, Howard Hughes Medical Institute, University of Colorado Boulder, Boulder, CO, 80303, USA. yuriko.harigaya@colorado.edu.

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Summary
This summary is machine-generated.

Inhibitory codon pairs in yeast mRNA are linked to faster decay, adding complexity to gene regulation beyond individual codon optimality. This impacts mRNA stability and translation efficiency.

Keywords:
Codon pairmRNA stabilitymRNA translation

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Codon optimality influences mRNA translation and degradation across organisms.
  • In Saccharomyces cerevisiae, 17 adjacent codon pairs were found to strongly inhibit translation elongation.
  • The impact of these inhibitory codon pairs on other gene expression facets remained unclear.

Purpose of the Study:

  • To investigate the relationship between inhibitory codon pairs and gene expression in Saccharomyces cerevisiae.
  • To determine if inhibitory codon pairs affect mRNA decay, synthesis, or protein stability.

Main Methods:

  • Genome-scale analyses were performed using existing datasets in S. cerevisiae.
  • Statistical associations between inhibitory codon pairs and mRNA decay, synthesis, and protein stability were evaluated.

Main Results:

  • Inhibitory codon pairs showed a significant association with faster mRNA decay, independent of nucleotide or individual codon content.
  • These pairs did not fully account for the known link between codon optimality and mRNA stability, indicating dual roles.
  • Associations with slower mRNA synthesis and protein instability were linked to individual codon usage bias.

Conclusions:

  • Inhibitory codon pairs are associated with mRNA stability, introducing a new layer to codon-mediated gene regulation.
  • Gene expression regulation involves both individual codon properties and adjacent codon pair characteristics.