ArticleThe Journal of cell biology2023
The abscission checkpoint senses chromatin bridges through Top2α recruitment to DNA knots.
Article in The Journal of cell biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 16 citations in OpenAlex.
- ESCRT-III assembles around mis-segregated DNA to protect genome stability.Nature structural & molecular biology · 2026Article
- Article
- Maintaining Genome Integrity: Actin Polymerization Stabilizes Chromatin Bridges in Cytokinesis.International journal of molecular sciences · 2026Review
- Safeguarding genome integrity: Polo-like kinase Cdc5 and phosphatase Cdc14 orchestrate Topoisomerase II-mediated catenane resolution in mitosis.Nucleic acids research · 2026Article
- Roles of Srs2/PARI-family DNA helicases in NoCut checkpoint signaling and abscission regulation.The Journal of cell biology · 2025Article
- Tension-sensitive LINC-RhoA signaling prevents chromatin bridge breakage in cytokinesis.The EMBO journal · 2025Article
- Elucidation of the molecular mechanism of the breakage-fusion-bridge (BFB) cycle using a CRISPR-dCas9 cellular model.Nucleic acids research · 2024Article
- Review
- Cell cycle responses to Topoisomerase II inhibition: Molecular mechanisms and clinical implications.The Journal of cell biology · 2023Review
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In response to chromatin bridges, the abscission checkpoint delays completion of cytokinesis to prevent chromosome breakage or tetraploidization. Here, we show that spontaneous or replication stress-induced chromatin bridges exhibit "knots" of catenated and overtwisted DNA next to the midbody. Topoisomerase IIα (Top2α) forms abortive Top2-DNA cleavage complexes (Top2ccs) on DNA knots; furthermore, impaired Top2α-DNA cleavage activity correlates with chromatin bridge breakage in cytokinesis. Proteasomal degradation of Top2ccs is required for Rad17 localization to Top2-generated double-strand DNA ends on DNA knots; in turn, Rad17 promotes local recruitment of the MRN complex and downstream ATM-Chk2-INCENP signaling to delay abscission and prevent chromatin breakage. In contrast, dicentric chromosomes that do not exhibit knotted DNA fail to activate the abscission checkpoint in human cells. These findings are the first to describe a mechanism by which the abscission checkpoint detects chromatin bridges, through generation of abortive Top2ccs on DNA knots, to preserve genome integrity.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.