Carrier protein for platelet (but not plasma) factor V/Va. Plays a role in the storage and stabilization of factor V in platelets. Upon release following platelet activation, may limit platelet and plasma factor Va-dependent thrombin generation. Ligand for integrin alpha-IIb/beta-3 and integrin alpha-V/beta-3 on activated platelets, and may function as an extracellular matrix or adhesive protein.
155 kDa platelet multimerin; ECM; Elastin microfibril interface located protein 4; Elastin microfibril interfacer 4; EMILIN-4; EMILIN4; Endothelial cell multimerin; glycoprotein Ia*; GPIA*; MMRN; MMRN1; Multimerin-1; p-155; p155; Platelet glycoprotein Ia*