Interactor of HORMAD1 protein 1 (IHO1, previously known as coiled-coil domain-containing protein 36 or DUF4700) is required for DNA double-strand breaks (DSBs) formation in unsynapsed regions during meiotic recombination. It is thought to function, in collaboration with SPO11-auxiliary proteins MEI4 and REC114, through the formation of DSB-promoting recombinosomes on chromatin at the onset of meiosis [1].

1: Meiotic DNA break formation requires the unsynapsed chromosome axis-binding protein IHO1 (CCDC36) in mice. Stanzione M, Baumann M, Papanikos F, Dereli I, Lange J, Ramlal A, Trankner D, Shibuya H, de Massy B, Watanabe Y, Jasin M, Keeney S, Toth A; Nat Cell Biol. 2016;18:1208-1220. PMID:27723721