Predicted to enable apolipoprotein binding activity. Predicted to act upstream of or within endocytosis. Predicted to be located in clathrin-coated pit. Predicted to be active in plasma membrane. Is expressed in axis; central nervous system; immature eye; pronephric duct; and retinal ganglion cell layer. Human ortholog(s) of this gene implicated in Alzheimer's disease; cerebellar ataxia, impaired intellectual development, and dysequilibrium syndrome 1; and dementia. Orthologous to human VLDLR (very low density lipoprotein receptor).