A mammalian methylation array for profiling methylation levels at conserved sequences

Abstract

Infinium methylation arrays are not available for the vast majority of non-human mammals. Moreover, even if species-specific arrays were available, probe differences between them would confound cross-species comparisons. To address these challenges, we developed the mammalian methylation array, a single custom array that measures up to 36k CpGs per species that are well conserved across many mammalian species. We designed a set of probes that can tolerate specific cross-species mutations. We annotate the array in over 200 species and report CpG island status and chromatin states in select species. Calibration experiments demonstrate the high fidelity in humans, rats, and mice. The mammalian methylation array has several strengths: it applies to all mammalian species even those that have not yet been sequenced, it provides deep coverage of conserved cytosines facilitating the development of epigenetic biomarkers, and it increases the probability that biological insights gained in one species will translate to others.

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Cited by papers we hold 5

• Aging clocks based on accumulating stochastic variation · 2024
  No notice
• Universal DNA methylation age across mammalian tissues · 2023
  Corrected
• Universal annotation of the human genome through integration of over a thousand epigenomic datasets · 2022
  No notice
• DNA methylation predicts age and provides insight into exceptional longevity of bats · 2021
  Corrected
• Epigenetic age prediction · 2021
  No notice

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