Topologically associating domains are disrupted by evolutionary genome rearrangements forming species-specific enhancer connections in mice and humans

Academic Article

Abstract

  • Distinguishing between conserved and divergent regulatory mechanisms is essential for translating preclinical research from mice to humans, yet there is a lack of information about how evolutionary genome rearrangements affect the regulation of the immune response, a rapidly evolving system. The current model is topologically associating domains (TADs) are conserved between species, buffering evolutionary rearrangements and conserving long-range interactions within a TAD. However, we find that TADs frequently span evolutionary translocation and inversion breakpoints near genes with species-specific expression in immune cells, creating unique enhancer-promoter interactions exclusive to the mouse or human genomes. This includes TADs encompassing immune-related transcription factors, cytokines, and receptors. For example, we uncover an evolutionary rearrangement that created a shared LPS-inducible regulatory module between OASL and P2RX7 in human macrophages that is absent in mice. Therefore, evolutionary genome rearrangements disrupt TAD boundaries, enabling sequence-conserved enhancer elements from divergent genomic locations between species to create unique regulatory modules.
  • Published In

  • Cell Reports  Journal
  • Digital Object Identifier (doi)

    Author List

  • Gilbertson SE; Walter HC; Gardner K; Wren SN; Vahedi G; Weinmann AS
  • Volume

  • 39
  • Issue

  • 5