endosome-associated VPS9a the conserved guanine-nucleotide exchange factor activating Rab5 GTPases is required for both pre- and postinvasive immunity against a nonadapted powdery mildew fungus.
VHA-a3 targets to the tonoplast through a Rab5-mediated but Rab7-independent pathway shedding new lights on the unconventional vacuolar trafficking route in plant cells.[Rab5]
A loss of FAB1 function causes the release of late endosomal proteins Ara7 and SNX1 from the endosome membrane indicating that FAB1 or its product PtdIns(3 5)P2 mediates the maturation process of the late endosomes.
Arabidopsis SAND protein is not required for early-to-late endosomal maturation although its role in mediating Rab5-to-Rab7 conversion is conserved. Instead it is essential for the subsequent fusion of multivesicular bodies with the vacuole.
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