Predicted to enable co-receptor binding activity; low-density lipoprotein particle receptor binding activity; and receptor antagonist activity. Involved in negative regulation of ossification and positive regulation of neuron death. Located in extracellular space. Used to study visual epilepsy. Human ortholog(s) of this gene implicated in anodontia. Orthologous to human DKK1 (dickkopf WNT signaling pathway inhibitor 1). [provided by Alliance of Genome Resources, Apr 2022]