This domain is found in Vacuolar protein sorting-associated protein 27 from Saccharomyces cerevisiae (Vps27) and similar sequences predominantly found in yeast. Vps27 binds to ubiquitinated transmembrane proteins and recruits both ubiquitin ligases and deubiquitinating enzymes. Besides the GAT domain (this entry), Vps27 contains VHS (Pfam:PF00790) and FYVE domains (Pfam:PF01363). This domain forms a three-helix bundle that resemble closely the structure of a GAT domain [1].

1: The Vps27/Hse1 complex is a GAT domain-based scaffold for ubiquitin-dependent sorting. Prag G, Watson H, Kim YC, Beach BM, Ghirlando R, Hummer G, Bonifacino JS, Hurley JH; Dev Cell. 2007;12:973-986. PMID:17543868