Enables collagen binding activity. Acts upstream of or within cell-matrix adhesion and negative regulation of platelet activation. Predicted to be located in cell surface. Is expressed in several structures, including hepatic primordium; liver; mesenchyme derived from splanchnopleure; placenta; and yolk sac. Orthologous to human GP5 (glycoprotein V platelet). [provided by Alliance of Genome Resources, Apr 2022]