Clathrin-coated vesicles (CCVs) originating from the trans-Golgi network (TGN) provide a major transport pathway from the secretory system to endosomes/lysosomes. Clavesin 1 and 2 (CLVS1 and 2) are enriched on CCVs and form a complex with clathrin heavy chain (CHC) and adaptor protein-1 (AP1) complex, major coat components of TGN-derived CCVs. The complex can bind phosphatidylinositol 3,5-bisphosphate (PIP2), a phospholipid localised to late endosomes and lysosomes. This interaction is thought to assist the transport of cytosolic cargo proteins to the endosomal network (Katoh et al. 2009).