five

RAB5 GEFs exchange GTP for GDP on RAB5

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reactome.org2025-01-21 收录
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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.

RAB5在早期内体小室中扮演重要角色,包括将起源于质膜的囊泡与早期内体融合,并参与网格蛋白介导的内吞作用(Chavrier 等,1990;Bucci 等,1992;Gorvel 等,1991;Hoffenberg 等,2000;Zeigerer 等,2012;Taylor 等,2011)。RAB5的激活由多种GEFs(鸟苷酸交换因子)介导,包括RIN(RAS和RAB相互作用蛋白)家族成员和ALS2家族成员,以及GAPVD1,所有这些均属于含有VPS9结构域的组别(Horiuchi 等,1997;Tall 等,2001;Saito 等,2002;Kajiho 等,2003;Kajiho 等,2011;Kunita 等,2004;Hadano 等,2004;Hunker 等,2006;Suzuki-Utsunomiya 等,2007;详见Ishida 等,2016年的综述)。RAB5与其GEFs的相互作用促进GDP的释放,使GTP得以结合,并阻止RAB5与GDI和CHM蛋白的相互作用。
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