Codon optimality is a major determinant of mRNA stability.
Codon optimality is a major determinant of mRNA stability.
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DOI:
10.1016/j.cell.2015.02.029
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发表时间:
2015-03-12
期刊:
影响因子:
64.5
通讯作者:
Coller J
中科院分区:
文献类型:
--
作者:
Presnyak V;Alhusaini N;Chen YH;Martin S;Morris N;Kline N;Olson S;Weinberg D;Baker KE;Graveley BR;Coller J
Messenger RNA degradation represents a critical regulated step in gene expression. While the major pathways in turnover have been identified, accounting for disparate half-lives has been elusive. We show that codon optimality is one feature that contributes greatly to mRNA stability. Genome-wide RNA decay analysis revealed that stable mRNAs are enriched in codons designated optimal, whereas unstable mRNAs contain predominately non-optimal codons. Substitution of optimal codons with synonymous, non-optimal codons results in dramatic mRNA destabilization, while the converse substitution significantly increases stability. Further, we demonstrate that codon optimality impacts ribosome translocation, connecting the processes of translation elongation and decay through codon optimality. Finally, we show that optimal codon content accounts for the similar stabilities observed in mRNAs encoding proteins with coordinated physiological function. This work demonstrates that codon optimization exists as an mechanism to finely tune levels of mRNAs, and ultimately, proteins.
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