During meiotic DNA recombination, binds to and may help activate DNA double-strand break (DSB) hotspot sites. Component of linear elements (LinEs), which are similar to synaptonemal complexes, at least composed of rec27, rec25, rec10 and mug20 (PubMed:23395004). Interacts with rec10; the interaction is direct (PubMed:31665745). Localizes to chromosomal double-strand break (DSB) hotspot sites during the meiotic cell cycle. Present from pre-meiotic DNA replication and disappears following meiotic prophase I. Abnormal linear element formation (PubMed:33825974, PubMed:23395004). Abnormal sporulation (PubMed:33825974).