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The fitness landscapes of translation

Author

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  • Josupeit, Mario
  • Krug, Joachim

Abstract

Motivated by recent experiments on an antibiotic resistance gene, we investigate genetic interactions between synonymous mutations in the framework of exclusion models of translation. We show that the range of possible interactions is markedly different depending on whether translation efficiency is assumed to be proportional to ribosome current or ribosome speed. In the first case every mutational effect has a definite sign that is independent of genetic background, whereas in the second case the effect-sign can vary depending on the presence of other mutations. The latter result is demonstrated using configurations of multiple translational bottlenecks induced by slow codons.

Suggested Citation

  • Josupeit, Mario & Krug, Joachim, 2021. "The fitness landscapes of translation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 569(C).
    • Handle: RePEc:eee:phsmap:v:569:y:2021:i:c:s0378437121000406
    DOI: 10.1016/j.physa.2021.125768
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    References listed on IDEAS

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    1. Sophia Rudorf & Reinhard Lipowsky, 2015. "Protein Synthesis in E. coli: Dependence of Codon-Specific Elongation on tRNA Concentration and Codon Usage," PLOS ONE, Public Library of Science, vol. 10(8), pages 1-22, August.
    2. Greulich, Philip & Schadschneider, Andreas, 2008. "Phase diagram and edge effects in the ASEP with bottlenecks," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 387(8), pages 1972-1986.
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