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Pattern of DNA methylation in daphnia : evolutionary perspective
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Kvist, Jouni, Gonçalves Athanàsio, Camila, Shams Solari, Omid, Brown, James B., Colbourne, John K., Pfrender, Michael E. and Mirbahai, Leda (2018) Pattern of DNA methylation in daphnia : evolutionary perspective. Genome Biology and Evolution, 10 (8). pp. 1988-2007. doi:10.1093/gbe/evy155
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Official URL: https://doi.org/10.1093/gbe/evy155
Abstract
DNA methylation is an evolutionary ancient epigenetic modification that is phylogenetically widespread. Comparative studies of the methylome across a diverse range of non-conventional and conventional model organisms is expected to help reveal how the landscape of DNA methylation and its functions have evolved. Here, we explore the DNA methylation profile of two species of the crustacean Daphnia using whole genome bisulfite sequencing. We then compare our data with the methylomes of two insects and two mammals to achieve a better understanding of the function of DNA methylation in Daphnia. Using RNA-sequencing data for all six species, we investigate the correlation between DNA methylation and gene expression. DNA methylation in Daphnia is mainly enriched within the coding regions of genes, with the highest methylation levels observed at exons 2-4. In contrast, vertebrate genomes are globally methylated, and increase towards the highest methylation levels observed at exon 2, and maintained across the rest of the gene body. Although DNA methylation patterns differ among all species, their methylation profiles share a bimodal distribution across the genomes. Genes with low levels of CpG methylation and gene expression are mainly enriched for species specific genes. In contrast, genes associated with high methylated CpG sites are highly transcribed and evolutionary conserved across all species. Finally, the positive correlation between internal exons and gene expression potentially points to an evolutionary conserved mechanism, whereas the negative regulation of gene expression via methylation of promoters and exon 1 is potentially a secondary mechanism that has been evolved in vertebrates.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QL Zoology | ||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences > Cell & Developmental Biology Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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| SWORD Depositor: | Library Publications Router | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Crustacea -- Genetics, DNA, Methylation | ||||||||||||
| Journal or Publication Title: | Genome Biology and Evolution | ||||||||||||
| Publisher: | Oxford University Press | ||||||||||||
| ISSN: | 1759-6653 | ||||||||||||
| Official Date: | 1 August 2018 | ||||||||||||
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| Volume: | 10 | ||||||||||||
| Number: | 8 | ||||||||||||
| Page Range: | pp. 1988-2007 | ||||||||||||
| DOI: | 10.1093/gbe/evy155 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||
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