Meta-Biol

• Pathways

RAB5 has roles at early endosomal compartments including fusion of vesicles originating from the plasma membrane with early endosomes, and is implicated in clathrin-mediated endocytosis (Chavrier et al, 1990; Bucci et al, 1992; Gorvel et al, 1991; Hoffenberg et al, 2000; Zeigerer et al, 2012; Taylor et al, 2011). RAB5 activation is mediated by a number of GEFs including members of the RIN (RAS and RAB interactor) and ALS2 families and GAPVD1, all of which belong to the VPS9-domain containing group (Horiuchi et al, 1997; Tall et al, 2001; Saito et al, 2002; Kajiho et al, 2003; Kajiho et al, 2011; Kunita et al, 2004; Hadano et al, 2004; Hunker et al, 2006; Suzuki-Utsunomiya et al, 2007; reviewed in Ishida et al, 2016). Interaction of RAB5 with its GEFs promotes release of GDP, allowing GTP to bind, and precludes the interaction of RAB5 with GDI and CHM proteins.