FUNCTION: Lipoprotein-associated calcium-independent phospholipase A2 involved in phospholipid catabolism during inflammatory and oxidative stress response (PubMed:7700381, PubMed:8624782, PubMed:2040620, PubMed:16371369, PubMed:17090529, PubMed:10066756). At the lipid-aqueous interface, hydrolyzes ...
FUNCTION: Lipoprotein-associated calcium-independent phospholipase A2 involved in phospholipid catabolism during inflammatory and oxidative stress response (PubMed:7700381, PubMed:8624782, PubMed:2040620, PubMed:16371369, PubMed:17090529, PubMed:10066756). At the lipid-aqueous interface, hydrolyzes the ester bond of fatty acyl group attached at sn-2 position of phospholipids (phospholipase A2 activity) (PubMed:2040620, PubMed:10504265). Specifically targets phospholipids with a short-chain fatty acyl group at sn-2 position (PubMed:2040620). Can hydrolyze phospholipids with long fatty acyl chains, only if they carry oxidized functional groups (PubMed:2040620, PubMed:8624782). Hydrolyzes and inactivates platelet-activating factor (PAF, 1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine), a potent pro-inflammatory signaling lipid that acts through PTAFR on various innate immune cells (PubMed:10504265, PubMed:10066756, PubMed:7592717, PubMed:11590221, PubMed:7700381, PubMed:18434304, PubMed:16371369, PubMed:8675689, PubMed:8624782). Hydrolyzes oxidatively truncated phospholipids carrying an aldehyde group at omega position, preventing their accumulation in low-density lipoprotein (LDL) particles and uncontrolled pro-inflammatory effects (PubMed:2040620, PubMed:7700381). As part of high-density lipoprotein (HDL) particles, can hydrolyze phospholipids having long-chain fatty acyl hydroperoxides at sn-2 position and protect against potential accumulation of these oxylipins in the vascular wall (PubMed:17090529). Catalyzes the release from membrane phospholipids of F2-isoprostanes, lipid biomarkers of cellular oxidative damage (PubMed:16371369). {ECO:0000269|PubMed:10066756, ECO:0000269|PubMed:10504265, ECO:0000269|PubMed:11590221, ECO:0000269|PubMed:16371369, ECO:0000269|PubMed:17090529, ECO:0000269|PubMed:18434304, ECO:0000269|PubMed:2040620, ECO:0000269|PubMed:7592717, ECO:0000269|PubMed:7700381, ECO:0000269|PubMed:8624782, ECO:0000269|PubMed:8675689}.
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GO - Biological processes (BP):
lipid oxidation [GO:0034440]; low-density lipoprotein particle remodeling [GO:0034374]; peptide hormone processing [GO:0016486]; phosphatidylcholine catabolic process [GO:0034638]; plasma lipoprotein particle oxidation [GO:0034441]; platelet activating factor catabolic process [GO:0062234]; platelet...
lipid oxidation [GO:0034440]; low-density lipoprotein particle remodeling [GO:0034374]; peptide hormone processing [GO:0016486]; phosphatidylcholine catabolic process [GO:0034638]; plasma lipoprotein particle oxidation [GO:0034441]; platelet activating factor catabolic process [GO:0062234]; platelet activating factor metabolic process [GO:0046469]; positive regulation of inflammatory response [GO:0050729]; positive regulation of monocyte chemotaxis [GO:0090026]
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GO - Molecular function (MF):
1-alkyl-2-acetylglycerophosphocholine esterase activity [GO:0003847]; calcium-independent phospholipase A2 activity [GO:0047499]; hydrolase activity, acting on ester bonds [GO:0016788]; phospholipid binding [GO:0005543]...
1-alkyl-2-acetylglycerophosphocholine esterase activity [GO:0003847]; calcium-independent phospholipase A2 activity [GO:0047499]; hydrolase activity, acting on ester bonds [GO:0016788]; phospholipid binding [GO:0005543]
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GO - Cellular component (CC):
cytoplasm [GO:0005737]; extracellular region [GO:0005576]; high-density lipoprotein particle [GO:0034364]; low-density lipoprotein particle [GO:0034362]...
cytoplasm [GO:0005737]; extracellular region [GO:0005576]; high-density lipoprotein particle [GO:0034364]; low-density lipoprotein particle [GO:0034362]
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