Enables identical protein binding activity. Involved in positive regulation of phosphorylation. Located in cytoplasm. Is expressed in dorsal root ganglion; glossopharyngeal ganglion; medulla oblongata basal plate mantle layer; trigeminal ganglion; and vagus ganglion. Orthologous to human KCTD20 (potassium channel tetramerization domain containing 20). [provided by Alliance of Genome Resources, Apr 2022]