Catalytic activity:2-lysophosphatidylcholine + H (2) O = glycerophosphocholine + a carboxylate. ,Catalytic activity:Phosphatidylcholine + H (2) O = 1-acylglycerophosphocholine + a carboxylate. ,Domain:The N-terminal C2 domain , by its association with lipid membranes , mediates the regulation of CPLA2 by presenting the active site to its substrate in response to elevations of cytosolic Ca (2+) . ,enzyme regulation:Stimulated by agonists such as ATP , EGF , thrombin and bradykinin as well as by cytosolic Ca (2+) . ,Function:Selectively hydrolyzes arachidonyl phospholipids in the sn-2 position releasing arachidonic acid. Together with its lysophospholipid activity , it is implicated in the initiation of the inflammatory response. ,PTM:Activated by phosphorylation at both Ser-505 and Ser-727. ,similarity:Contains 1 C2 domain. ,similarity:Contains 1 PLA2c domain. ,subcellular location:Translocates to membrane vesicles in a calcium-dependent fashion. ,subunit:Interacts with HTATIP. ,tissue specificity:Expressed in various tissues such as macrophages , platelets , neutrophils , fibroblasts and lung endothelium. ,
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