Class C Vps protein complex regulates vacuolar SNARE pairing and is required for vesicle docking/fusion.
Sato TK, Rehling P, Peterson MR, Emr SD, Mol Cell, 2000 Sep - link

Vac1p coordinates Rab and phosphatidylinositol 3-kinase signaling in Vps45p-dependent vesicle docking/fusion at the endosome.
Peterson MR, Burd CG, Emr SD, Curr Biol, 1999 Feb 11 - link