deltaTE: Detection of Translationally Regulated Genes by Integrative Analysis of Ribo‐seq and RNA‐seq Data

Ribosome profiling quantifies the genome‐wide ribosome occupancy of transcripts. With the integration of matched RNA sequencing data, the translation efficiency (TE) of genes can be calculated to reveal translational regulation. This layer of gene‐expression regulation is otherwise difficult to assess on a global scale and generally not well understood in the context of human disease. Current statistical methods to calculate differences in TE have low accuracy, cannot accommodate complex experimental designs or confounding factors, and do not categorize genes into buffered, intensified, or exclusively translationally regulated genes. This article outlines a method [referred to as deltaTE (ΔTE), standing for change in TE] to identify translationally regulated genes, which addresses the shortcomings of previous methods. In an extensive benchmarking analysis, ΔTE outperforms all methods tested. Furthermore, applying ΔTE on data from human primary cells allows detection of substantially more translationally regulated genes, providing a clearer understanding of translational regulation in pathogenic processes. In this article, we describe protocols for data preparation, normalization, analysis, and visualization, starting from raw sequencing files. © 2019 The Authors.

[1]  Martin Vingron,et al.  Translational regulation shapes the molecular landscape of complex disease phenotypes , 2015, Nature Communications.

[2]  Xuerui Yang,et al.  Genome-wide assessment of differential translations with ribosome profiling data , 2016, Nature Communications.

[3]  Xinnian Dong,et al.  Global translational reprogramming is a fundamental layer of immune regulation in plants , 2017, Nature.

[4]  Fei Ji,et al.  RNA‐seq: Basic Bioinformatics Analysis , 2018, Current protocols in molecular biology.

[5]  Eleni G. Christodoulou,et al.  Widespread Translational Control of Fibrosis in the Human Heart by RNA-Binding Proteins , 2019, Circulation.

[6]  David M. Simcha,et al.  Tackling the widespread and critical impact of batch effects in high-throughput data , 2010, Nature Reviews Genetics.

[7]  W. Huber,et al.  Moderated estimation of fold change and dispersion for RNA-seq data with DESeq2 , 2014, Genome Biology.

[8]  Mark D. Robinson,et al.  edgeR: a Bioconductor package for differential expression analysis of digital gene expression data , 2009, Bioinform..

[9]  Nicholas T Ingolia,et al.  Genome-wide annotation and quantitation of translation by ribosome profiling. , 2013, Current protocols in molecular biology.

[10]  Weili Wang,et al.  Riborex: fast and flexible identification of differential translation from Ribo‐seq data , 2017, Bioinform..

[11]  Nicholas T. Ingolia,et al.  Genome-Wide Analysis in Vivo of Translation with Nucleotide Resolution Using Ribosome Profiling , 2009, Science.

[12]  Davis J. McCarthy,et al.  Count-based differential expression analysis of RNA sequencing data using R and Bioconductor , 2013, Nature Protocols.

[13]  O. Larsson,et al.  Generally applicable transcriptome-wide analysis of translation using anota2seq , 2019, Nucleic acids research.

[14]  Gunnar Rätsch,et al.  RiboDiff: detecting changes of mRNA translation efficiency from ribosome footprints , 2015, bioRxiv.