ArticleNature communications2026
TONSOKU prevents the formation of large tandem duplications and restrains ATR-WEE1 checkpoint activation.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- TONSL emerges as a key barrier to prevent large tandem duplications.Nature structural & molecular biology · 2026Article
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6 authors.
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Abstract
Copy number variation (CNV) plays a fundamental role in modulating plant agronomic traits and tumorigenesis in animals. While frequently linked to replication stress, the mechanisms giving rise to CNVs are not fully elucidated. Here we characterize the mutational consequences associated with losing the conserved TONSOKU (TSK/TONSL) pathway (CAF-1-H3.1-TSK), which is required to resolve impaired DNA replication forks. Using Arabidopsis thaliana, we demonstrate that tsk mutants rapidly accumulate large, heritable tandem duplications within their genomes that are consistent with DNA Polymerase θ (Pol θ) activity. These duplications are associated with late replicating heterochromatin enriched in sources of replication stress. We also show that stochastic developmental phenotypes in tsk plants are the result of the DNA Damage Response (DDR), with phenotype suppression occurring when ATR-WEE1 checkpoint signaling is removed. We thus describe a previously uncharacterized source of large tandem duplications that are relevant to understanding genome stability in diverse eukaryotes, and in disease contexts.
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