Binds phospholipids; exhibits strong binding to phosphatidic acid and weak binding to phosphatidylinositol 3-phosphate (By similarity). Stabilizes GTP-bound RAB7A on late endosomes/lysosomes and alters functional properties of late endocytic compartments via its interaction with RAB7A . Binds 25-hydroxycholesterol and cholesterol .
Subcellular locations: Late endosome
Colocalizes with RAB7A, RAB9A and LAMP1 in late endosomes.