ArticleThe Journal of biological chemistry2023
The MRN complex and topoisomerase IIIa-RMI1/2 synchronize DNA resection motor proteins.
Article in The Journal of biological chemistry, 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, 14 citations in OpenAlex.
- Activation of Pol theta-mediated end joining begins during mitotic commitment.bioRxiv : the preprint server for biology · 2026Article
- RMI2 knockdown suppresses ovarian cancer cell growth by impairing DNA damage repair via the ATR/CHK1 signaling pathway.In vitro cellular & developmental biology. Animal · 2026Article
- Mechanisms and regulation of DNA end resection in the maintenance of genome stability.Nature reviews. Molecular cell biology · 2025Review
- Using the safety scissors: DNA resection regulation at DNA double-strand breaks and telomeres.DNA repair · 2025Review
- Hyper-recombination in ribosomal DNA is driven by long-range resection-independent RAD51 accumulation.Nature communications · 2024Article
- Single-molecule fluorescence imaging of DNA maintenance protein binding dynamics and activities on extended DNA.Current opinion in structural biology · 2024Review
- Resection of DNA double-strand breaks activates Mre11-Rad50-Nbs1- and Rad9-Hus1-Rad1-dependent mechanisms that redundantly promote ATR checkpoint activation and end processing in Xenopus egg extracts.Nucleic acids research · 2024Article
- Variation of Structure and Cellular Functions of Type IA Topoisomerases across the Tree of Life.Cells · 2024Review
- RMI1 facilitates repair of ionizing radiation-induced DNA damage and maintenance of genomic stability.Cell death discovery · 2023Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
DNA resection-the nucleolytic processing of broken DNA ends-is the first step of homologous recombination. Resection is catalyzed by the resectosome, a multienzyme complex that includes bloom syndrome helicase (BLM), DNA2 or exonuclease 1 nucleases, and additional DNA-binding proteins. Although the molecular players have been known for over a decade, how the individual proteins work together to regulate DNA resection remains unknown. Using single-molecule imaging, we characterized the roles of the MRE11-RAD50-NBS1 complex (MRN) and topoisomerase IIIa (TOP3A)-RMI1/2 during long-range DNA resection. BLM partners with TOP3A-RMI1/2 to form the BTRR (BLM-TOP3A-RMI1/2) complex (or BLM dissolvasome). We determined that TOP3A-RMI1/2 aids BLM in initiating DNA unwinding, and along with MRN, stimulates DNA2-mediated resection. Furthermore, we found that MRN promotes the association between BTRR and DNA and synchronizes BLM and DNA2 translocation to prevent BLM from pausing during resection. Together, this work provides direct observation of how MRN and DNA2 harness the BTRR complex to resect DNA efficiently and how TOP3A-RMI1/2 regulates the helicase activity of BLM to promote efficient DNA repair.
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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.