Enables PDZ domain binding activity. Involved in negative regulation of convergent extension involved in axis elongation and regulation of Wnt signaling pathway. Predicted to be located in plasma membrane. Predicted to be part of protein phosphatase type 2A complex. Predicted to be active in cytoplasm. Is expressed in several structures, including brain; genitourinary system; gut; retina; and unsegmented mesenchyme. Orthologous to human NKD1 (NKD inhibitor of WNT signaling pathway 1). [provided by Alliance of Genome Resources, Apr 2022]