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Conservation of uORF repressiveness and sequence features in mouse, human and zebrafish
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Conservation of uORF repressiveness and sequence features in mouse, human and zebrafish
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Journal Article
Conservation of uORF repressiveness and sequence features in mouse, human and zebrafish
2016
Overview
Upstream open reading frames (uORFs) are ubiquitous repressive genetic elements in vertebrate mRNAs. While much is known about the regulation of individual genes by their uORFs, the range of uORF-mediated translational repression in vertebrate genomes is largely unexplored. Moreover, it is unclear whether the repressive effects of uORFs are conserved across species. To address these questions, we analyse transcript sequences and ribosome profiling data from human, mouse and zebrafish. We find that uORFs are depleted near coding sequences (CDSes) and have initiation contexts that diminish their translation. Linear modelling reveals that sequence features at both uORFs and CDSes modulate the translation of CDSes. Moreover, the ratio of translation over 5′ leaders and CDSes is conserved between human and mouse, and correlates with the number of uORFs. These observations suggest that the prevalence of vertebrate uORFs may be explained by their conserved role in repressing CDS translation.
Upstream open reading frames (uORFs) can repress gene expression. Here, Guo-Liang Chew and colleagues use bioinformatics approaches to show that conservation of uORF-mediated translational repression is mediated by sequence features in human, mouse and zebrafish genomes.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
