Predicted to enable LBD domain binding activity. Predicted to be involved in cell adhesion. Predicted to act upstream of or within positive regulation of protein binding activity; positive regulation of protein processing; and regulation of amyloid precursor protein catabolic process. Predicted to be located in extracellular region. Predicted to be active in extracellular matrix. Orthologous to human SPON1 (spondin 1). [provided by Alliance of Genome Resources, Apr 2022]