Enables extracellular matrix binding activity. Acts upstream of or within extracellular matrix organization; positive regulation of cell-substrate adhesion; and regulation of enamel mineralization. Located in extracellular matrix and nucleus. Is expressed in several structures, including alimentary system; genitourinary system; immune system; nervous system; and stylopod. Used to study autosomal recessive hypophosphatemic rickets. Orthologous to human DMP1 (dentin matrix acidic phosphoprotein 1). [provided by Alliance of Genome Resources, Apr 2022]