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September 10, 2025Nucleic Acids ResearchOpen Access

Rad51, Rad54, and ZMM proteins antagonize the mismatch repair system to promote fertility of budding yeast intraspecies hybrid zygotes

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Budding yeast proteins Rad51 and Rad54 antagonize mismatch repair during meiosis, suggesting enhanced hybrid fertility.

Rad51 participates in antagonizing mismatch repair, which is crucial for promoting fertility in hybrid zygotes.
Key finding shows Rad54's anti-mismatch repair activity outcompetes its pro-homologous recombination function.
Research indicates ZMM proteins are recruited to facilitate class I crossovers during hybrid meiosis.
Meiosis-related processes are essential for understanding speciation, with mismatch repair preventing interspecies hybridization.

Hung et al. (2025) studied this question.

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