Automated description from the Alliance of Genome Resources (Release 7.0.0)
Enables heparin binding activity and signaling receptor binding activity. Involved in positive regulation of canonical Wnt signaling pathway. Acts upstream of or within several processes, including male meiotic nuclear division; positive regulation of non-canonical Wnt signaling pathway; and regulation of male germ cell proliferation. Located in extracellular space and nucleus. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; integumental system; and limb. Orthologous to human RSPO1 (R-spondin 1).