Apolipoprotein H has been implicated in a variety of physiologic pathways including lipoprotein metabolism, coagulation, and the production of antiphospholipid autoantibodies. APOH may be a required cofactor for anionic phospholipid binding by the antiphospholipid autoantibodies found in sera of many patients with lupus and primary antiphospholipid syndrome, but it does not seem to be required for the reactivity of antiphospholipid autoantibodies associated with infections. [provided by RefSeq, Jul 2008],
show all
Function:
Function:Binds to various kinds of negatively charged substances such as heparin, phospholipids, and dextran sulfate. May prevent activation of the intrinsic blood coagulation cascade by binding to phospholipids on the surface of damaged cells.,miscellaneous:In addition to the conflicts shown in the feature table, PubMed:6587378 reports an N-glycosylation site at Asn-188.,online information:The Singapore human mutation and polymorphism database,similarity:Contains 4 Sushi (CCP/SCR) domains.,tissue specificity:Expressed by the liver and secreted in plasma.,