Adjacent Codons Act in Concert to Modulate Translation Efficiency in Yeast
| Autor: | Christina E. Brule, Stanley Fields, Kimberly Dean, Elizabeth J. Grayhack, Caitlin E. Gamble |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Genetics Saccharomyces cerevisiae Proteins Genes Fungal Translation (biology) RNA Fungal Saccharomyces cerevisiae Biology Ribosome General Biochemistry Genetics and Molecular Biology Stop codon Article 03 medical and health sciences Open reading frame 030104 developmental biology RNA Transfer Codon usage bias Protein Biosynthesis Transfer RNA Ribosome profiling Codon Gene Ribosomes |
| Zdroj: | Cell. 166(3) |
| ISSN: | 1097-4172 |
| Popis: | Translation elongation efficiency is largely thought of as the sum of decoding efficiencies for individual codons. Here, we find that adjacent codon pairs modulate translation efficiency. Deploying an approach in Saccharomyces cerevisiae that scored the expression of over 35,000 GFP variants in which three adjacent codons were randomized, we have identified 17 pairs of adjacent codons associated with reduced expression. For many pairs, codon order is obligatory for inhibition, implying a more complex interaction than a simple additive effect. Inhibition mediated by adjacent codons occurs during translation itself as GFP expression is restored by increased tRNA levels or by non-native tRNAs with exact-matching anticodons. Inhibition operates in endogenous genes, based on analysis of ribosome profiling data. Our findings suggest translation efficiency is modulated by an interplay between tRNAs at adjacent sites in the ribosome and that this concerted effect needs to be considered in predicting the functional consequences of codon choice. |
| Databáze: | OpenAIRE |
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