Abstract
DNA methylation installs a methyl group to cytosine, placing an epigenetic mark that regulates gene expression. Comparative epigenomics combines epigenetic signatures with phylogenetic relationships to understand species characteristics. Haghani et al. evaluated methylation levels in highly conserved DNA sequences, profiling ~15,000 samples across 348 mammalian species (see the Perspective by de Mendoza). Phylogenetic trees suggest that the divergence of DNA methylation profiles closely mirrors genetic evolution. Species with longer maximum life spans have developed tidier methylation patterns within the genome, characterized by unique peaks and troughs of methylation. Methylation patterns associated with maximum life spans generally differ from those connected to age or interventions that affect mortality risk in mice. These data provide a rich resource of information for fields including evolutionary biology and longevity research. —Di Jiang
Original language | English |
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Article number | eabq5693 |
Number of pages | 16 |
Journal | Science |
Volume | 381 |
Issue number | 6658 |
DOIs | |
Publication status | Published - 11 Aug 2023 |