Predicted to enable cullin family protein binding activity; histone deacetylase binding activity; and identical protein binding activity. Predicted to be involved in negative regulation of smoothened signaling pathway and ubiquitin-dependent protein catabolic process. Predicted to act upstream of or within regulation of growth. Orthologous to human KCTD21 (potassium channel tetramerization domain containing 21). [provided by Alliance of Genome Resources, Apr 2022]