DNAJ protein RME-8 (receptor-mediated endocytosis-8; Gvr2 in Arabidopsis) is involved in membrane trafficking through early endosomes and in the regulation of endosomal membrane tubulation. It regulates the dynamics of SNX1 (sorting nexin 1) on the endosomal membrane. It coordinates the function of the WASH complex and the retromer SNX dimer through its interaction with FAM21 subunit in WASH complex. This is the N-terminal domain of RME-8, which is required for membrane association and interaction with FAM21 tail domain [1]. It contains critical residues mediating phosphatidylinositol 3-phosphate (PI(3)P) binding, required for its association with endosomes [2].

1: RME-8 coordinates the activity of the WASH complex with the function of the retromer SNX dimer to control endosomal tubulation. Freeman CL, Hesketh G, Seaman MN; J Cell Sci. 2014;127:2053-2070. PMID:24643499

2: Receptor-mediated Endocytosis 8 Utilizes an N-terminal Phosphoinositide-binding Motif to Regulate Endosomal Clathrin Dynamics. Xhabija B, Vacratsis PO; J Biol Chem. 2015;290:21676-21689. PMID:26134565