Required for DNA double-strand breaks (DSBs) formation in unsynapsed regions during meiotic recombination. Probably acts by forming a complex with IHO1 and REC114, which activates DSBs formation in unsynapsed regions, an essential step to ensure completion of synapsis. Interacts with REC114 (PubMed:31704776). Part of the MCD recombinosome complex, at least composed of IHO1, REC114 and MEI4. Specifically localizes to unsynapsed chromosomal regions during meiosis. Located in discrete foci on the axes of meiotic chromosomes. The number of foci is highest at leptonema, decreases at zygonema and is strongly reduced in pachynema and subsequent stages. Belongs to the MEI4L family.