BTBD6 (BTB domain containing 6) functions as an adapter protein for the CUL3 E3 ubiquitin-protein ligase complex 1, playing a conserved role in neuronal development and muscle formation. In Xenopus and Drosophila models, BTBD6/lute is essential for late neuronal development, with knockdown resulting in defects in late neural markers and disorganized axons, while early neural development remains unaffected 1. BTBD6 expression responds positively to proneural genes and negatively to neurogenic gene overexpression, indicating its role in neuronal differentiation 1. Beyond development, BTBD6 has emerged as a disease-relevant gene in cancer biology. It was identified as part of a 16-gene apoptosis and hypoxia signature predicting breast cancer prognosis and immune infiltration 2, and as a candidate susceptibility gene for pancreatic cancer through transcriptome-wide association analysis 3. BTBD6 also appears relevant to uveal melanoma prognosis as part of a six-gene glycolysis and immune response signature 4, and as a hub gene in idiopathic male infertility networks 5. Clinically, BTBD6 deletions contribute to 14q32 deletion syndrome, characterized by intellectual disability and facial dysmorphisms 6.