Wnt signaling plays important roles in embryonic development and cancer formation. Wntless (GPR177) is a putative G-protein coupled receptor that regulates Wnt's trafficking and secretion. It can regulate the expression, subcellular location, binding, and organelle-specific association of Wnt proteins. In mammals, Wntless is mainly expressed in submucosa, muscle, ganglia, and nerve cells of the large intestines. Overexpression of Wntless may activate the NF-kappaB signaling pathway in cancer cells.