The abstract is read at the publisher; the summary is JClub's.
Long-read telomere-to-telomere sequencing shows the human 5S rDNA array is zoned, with each unit displaying bimodal methylation and a stable average count of low-methylation units.
- Why it matters: The positional organization and epigenetic states of 5S rDNA units along complete arrays have been unclear, limiting understanding of how array structure relates to chromatin regulation.
- What they did: The authors resolved flank-to-flank 5S rDNA arrays on single molecules and tracked unit methylation states; they also used Fiber-seq plus ATAC-seq and ChIP-seq to assess chromatin accessibility and nucleosome occupancy.
- The result: Low-methylation units are more accessible, have lower nucleosome occupancy, and show more frequent TFIIIB-binding-site footprints, a pattern shared among apes and linked to zone-specific chromatin architecture.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.