The role of Rab3a in secretory vesicle docking requires association/dissociation of guanidine phosphates and Munc18-1.
van Weering JR, Toonen RF, Verhage M, PLoS One, 2007 Jul 18 - link

Docking of secretory vesicles is syntaxin dependent.
de Wit H, Cornelisse LN, Toonen RF, Verhage M, PLoS One, 2006 Dec 27 - link

Dissecting docking and tethering of secretory vesicles at the target membrane.
Toonen RF, Kochubey O, de Wit H, Gulyas-Kovacs A, Konijnenburg B, Srensen JB, Klingauf J, Verhage M, EMBO J, 2006 Aug 23 - link

Munc18-1 promotes large dense-core vesicle docking.
Voets T, Toonen RF, Brian EC, de Wit H, Moser T, Rettig J, Sudhof TC, Neher E, Verhage M, Neuron, 2001 Aug 30 - link