ArticleThe New phytologist2024
FIGL1 attenuates meiotic interhomolog repair and is counteracted by the RAD51 paralog XRCC2 and the chromosome axis protein ASY1 during meiosis.
Article in The New phytologist, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- The HORMA-domain protein ASY1 recruits the plant-specific cyclin SDS to promote DMC1-mediated meiotic recombination.The Plant cell · 2026Article
- Structure and function of the synaptonemal complex.The Journal of cell biology · 2026Review
- RECQ4 restricts non-interfering crossover formation to fine-tune meiotic recombination rates in rice.Plant biotechnology journal · 2025Article
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9 authors.
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Abstract
Two recombinases, RAD51 and DMC1, catalyze meiotic break repair to ensure crossovers (COs) between homologous chromosomes (interhomolog) rather than between sisters (intersister). FIDGETIN-LIKE-1 (FIGL1) downregulates both recombinases. However, the understanding of how FIGL1 functions in meiotic repair remains limited. Here, we discover new genetic interactions of Arabidopsis thaliana FIGL1 that are important in vivo determinants of meiotic repair outcome. In figl1 mutants, compromising RAD51-dependent repair, either through the loss of RAD51 paralogs (RAD51B or XRCC2) or RAD54 or by inhibiting RAD51 catalytic activity, results in either unrepaired breaks or meiotic CO defects. Further, XRCC2 physically interacts with FIGL1 and partially counteracts FIGL1 activity for RAD51 focus formation. Our data indicate that RAD51-mediated repair mechanisms compensate FIGL1 dysfunction. FIGL1 is not necessary for intersister repair in dmc1 but is essential for the completion of meiotic repair in mutants such as asy1 that have impaired DMC1 functions and interhomolog bias. We show that FIGL1 attenuates interhomolog repair, and ASY1 counteracts FIGL1 to promote interhomolog recombination. Altogether, this study underlines that multiple factors can counteract FIGL1 activity to promote accurate meiotic repair.
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