Component of the retromer complex which acts in conjunction with wingless (wg) and clathrin-mediated endocytosis to sustain a wntless (wls) traffic loop. This loop encompasses the Golgi, the cell surface, an endocytic compartment and a retrograde route leading back to the Golgi, thereby enabling wls to direct wg secretion. The hh and dpp signaling pathways do not require the retromer complex suggesting that it does not play a general role in exocytosis. Component of the retromer complex, composed of Vps26 and Vps35. Accumulation of wg in the Golgi, preventing wg from being secreted from the cells. Belongs to the VPS26 family.