Has a role in non-canonical Wnt/planar cell polarity (PCP) signaling; can recruit dvl/dsh and prickle from the cytoplasm to the plasma membrane. Acts in a PCP complex to regulate the polarized assembly of fibronectrin on the surface of the mesoderm during gastrulation. Regulates convergent extension in both dorsal mesoderm and neural tissue without affecting cell fate. Regulates neural fold closure during neurulation. May be required for cell surface localization of fzd3 and fzd6 in the inner ear (By similarity). Interacts with dvl/dsh (By similarity). Interacts with prickle3 (By similarity). Cell membrane localization is regulated by prickle. Belongs to the Vang family.