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Full-length ribosome density prediction by a multi-input and multi-output model.
- Source :
-
PLoS computational biology [PLoS Comput Biol] 2021 Mar 26; Vol. 17 (3), pp. e1008842. Date of Electronic Publication: 2021 Mar 26 (Print Publication: 2021). - Publication Year :
- 2021
-
Abstract
- Translation elongation is regulated by a series of complicated mechanisms in both prokaryotes and eukaryotes. Although recent advance in ribosome profiling techniques has enabled one to capture the genome-wide ribosome footprints along transcripts at codon resolution, the regulatory codes of elongation dynamics are still not fully understood. Most of the existing computational approaches for modeling translation elongation from ribosome profiling data mainly focus on local contextual patterns, while ignoring the continuity of the elongation process and relations between ribosome densities of remote codons. Modeling the translation elongation process in full-length coding sequence (CDS) level has not been studied to the best of our knowledge. In this paper, we developed a deep learning based approach with a multi-input and multi-output framework, named RiboMIMO, for modeling the ribosome density distributions of full-length mRNA CDS regions. Through considering the underlying correlations in translation efficiency among neighboring and remote codons and extracting hidden features from the input full-length coding sequence, RiboMIMO can greatly outperform the state-of-the-art baseline approaches and accurately predict the ribosome density distributions along the whole mRNA CDS regions. In addition, RiboMIMO explores the contributions of individual input codons to the predictions of output ribosome densities, which thus can help reveal important biological factors influencing the translation elongation process. The analyses, based on our interpretable metric named codon impact score, not only identified several patterns consistent with the previously-published literatures, but also for the first time (to the best of our knowledge) revealed that the codons located at a long distance from the ribosomal A site may also have an association on the translation elongation rate. This finding of long-range impact on translation elongation velocity may shed new light on the regulatory mechanisms of protein synthesis. Overall, these results indicated that RiboMIMO can provide a useful tool for studying the regulation of translation elongation in the range of full-length CDS.<br />Competing Interests: The authors have declared that no competing interests exist.
- Subjects :
- Codon genetics
Codon metabolism
Escherichia coli genetics
RNA, Messenger chemistry
RNA, Messenger genetics
RNA, Messenger metabolism
Saccharomyces cerevisiae genetics
Computational Biology methods
Deep Learning
Models, Genetic
Peptide Chain Elongation, Translational genetics
Ribosomes genetics
Ribosomes metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1553-7358
- Volume :
- 17
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- PLoS computational biology
- Publication Type :
- Academic Journal
- Accession number :
- 33770074
- Full Text :
- https://doi.org/10.1371/journal.pcbi.1008842