ArticleNucleic acids research2024
The TOPOVIBL meiotic DSB formation protein: new insights from its biochemical and structural characterization.
Article in Nucleic acids research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Controlling Meiotic Double-Strand Break Formation in Mice: A Web of Multivalent Protein-Protein Interactions.BioEssays : news and reviews in molecular, cellular and developmental biology · 2026Review
- Catalytic Tunnel Dynamics Explain Functional Divergence of FAD2 Homologs Underlying the Oleic-to-Linoleic Ratio inBiology · 2026Article
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- Reconstitution of SPO11-dependent double-strand break formation.bioRxiv : the preprint server for biology · 2024Article
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8 authors.
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Abstract
The TOPOVIL complex catalyzes the formation of DNA double strand breaks (DSB) that initiate meiotic homologous recombination, an essential step for chromosome segregation and genetic diversity during gamete production. TOPOVIL is composed of two subunits (SPO11 and TOPOVIBL) and is evolutionarily related to the archaeal TopoVI topoisomerase complex. SPO11 is the TopoVIA subunit orthologue and carries the DSB formation catalytic activity. TOPOVIBL shares homology with the TopoVIB ATPase subunit. TOPOVIBL is essential for meiotic DSB formation, but its molecular function remains elusive, partly due to the lack of biochemical studies. Here, we purified TOPOVIBLΔC25 and characterized its structure and mode of action in vitro. Our structural analysis revealed that TOPOVIBLΔC25 adopts a dynamic conformation in solution and our biochemical study showed that the protein remains monomeric upon incubation with ATP, which correlates with the absence of ATP binding. Moreover, TOPOVIBLΔC25 interacted with DNA, with a preference for some geometries, suggesting that TOPOVIBL senses specific DNA architectures. Altogether, our study identified specific TOPOVIBL features that might help to explain how TOPOVIL function evolved toward a DSB formation activity in meiosis.
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