The INO80 chromatin remodeling complex is known to be related to DNA repair in yeast, mammals, and plants. In yeast, the INO80 complex is recruited to the DSBs (DNA double-strand breaks) through the direct interaction of its Nhp10 (non-histone protein 10) or Arp4 (Actin-Related Protein) subunits with phosphorylated histone H2A. However, the ortholog of yeast Nhp10 does not exist in mammals [1]. The Nhp10 module consists of Nhp10, Ies1, Ies3, and Ies5. These yeast-specific subunits cross-link to the N terminus of Ino80 and form a stable complex in-vitro, which helps high-affinity targeting of INO80 to nucleosome-binding [2].

1: The mammalian INO80 complex is recruited to DNA damage sites in an ARP8 dependent manner. Kashiwaba S, Kitahashi K, Watanabe T, Onoda F, Ohtsu M, Murakami Y; Biochem Biophys Res Commun. 2010;402:619-625. PMID:20971067

2: Structure and subunit topology of the INO80 chromatin remodeler and its nucleosome complex. Tosi A, Haas C, Herzog F, Gilmozzi A, Berninghausen O, Ungewickell C, Gerhold CB, Lakomek K, Aebersold R, Beckmann R, Hopfner KP; Cell. 2013;154:1207-1219. PMID:24034245