Collagen receptor involved in collagen-induced platelet adhesion and activation. Plays a key role in platelet procoagulant activity and subsequent thrombin and fibrin formation. This procoagulant function may contribute to arterial and venous thrombus formation. The signaling pathway involves the FcR gamma-chain, the Src kinases (likely FYN or LYN) and SYK, the adapter protein LAT and leads to the activation of PLCG2. {ECO:0000269|PubMed:10961879, ECO:0000269|PubMed:18955485}. This is the function of ENSG00000088053 (GP6, glycoprotein VI platelet).