Cdc42p functions at the docking stage of yeast vacuole membrane fusion.
Muller O, Johnson DI, Mayer A, EMBO J, 2001 Oct 15 - link

Ca2+/calmodulin signals the completion of docking and triggers a late step of vacuole fusion.
Peters C, Mayer A, Nature, 1998 Dec 10 - link

Docking of yeast vacuoles is catalyzed by the Ras-like GTPase Ypt7p after symmetric priming by Sec18p (NSF).
Mayer A, Wickner W, J Cell Biol, 1997 Jan 27 - link

Sec18p (NSF)-driven release of Sec17p (alpha-SNAP) can precede docking and fusion of yeast vacuoles.
Mayer A, Wickner W, Haas A, Cell, 1996 Apr 5 - link