Vacuolar membrane protein and Qc class t-SNARE; functions as a SNAP receptor; involved with Vam3p in vacuolar protein trafficking; has an N-terminal PX domain (phosphoinositide-binding module) that binds both PtdIns-3-P and phosphatidic acid, and mediates membrane binding; localizes to both the vacuolar membrane and the phagophore assembly site; SNAP-25 homolog; protein abundance increases in response to DNA replication stress