Adapter protein for the cul3 E3 ubiquitin-protein ligase complex (By similarity). Involved in late neuronal development and muscle formation (By similarity). {ECO:0000250|UniProtKB:A9JRD8, ECO:0000250|UniProtKB:Q2LE78}. This is the function of Ensembl gene identifier ENSG00000184887 (BTBD6, BTB domain containing 6).