This domain corresponds to the N terminal longin domain of vacuolar R-SNARE Nyv1 which contains YXXomega-like sorting motif (Y31GTI34), responsible for the AP3-dependent vacuolar localization of Nyv1 [1].

1: Identification of the yeast R-SNARE Nyv1p as a novel longin domain-containing protein. Wen W, Chen L, Wu H, Sun X, Zhang M, Banfield DK; Mol Biol Cell. 2006;17:4282-4299. PMID:16855025