| Tissue Specificity | Plasma. Secreted by macrophages (at protein level). |
| Post Translational Modifications | N-glycosylated. Macrophage-derived PLA2G7 carries sialylated complex-type N-glycans that hinder its binding to HDL particles. |
| Function | Lipoprotein-associated calcium-independent phospholipase A2 involved in phospholipid catabolism during inflammatory and oxidative stress response. At the lipid-aqueous interface, hydrolyzes the ester bond of fatty acyl group attached at sn-2 position of phospholipids (phospholipase A2 activity). Specifically targets phospholipids with a short-chain fatty acyl group at sn-2 position. Can hydrolyze phospholipids with long fatty acyl chains, only if they carry oxidized functional groups. 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. 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. 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. Catalyzes the release from membrane phospholipids of F2-isoprostanes, lipid biomarkers of cellular oxidative damage. |
| Protein Name | Platelet-Activating Factor AcetylhydrolasePaf Acetylhydrolase1-Alkyl-2-Acetylglycerophosphocholine Esterase2-Acetyl-1-Alkylglycerophosphocholine EsteraseGroup-Viia Phospholipase A2Gviia-Pla2Ldl-Associated Phospholipase A2Ldl-Pla(2Paf 2-Acylhydrolase |
| Database Links | Reactome: R-HSA-422085 |
| Cellular Localisation | SecretedExtracellular SpaceAssociates With Both Ldl And Hdl Particles In PlasmaMainly Associates With Pro-Inflammatory Electronegative Ldl Particles |
| Alternative Protein Names | Platelet-Activating Factor Acetylhydrolase proteinPaf Acetylhydrolase protein1-Alkyl-2-Acetylglycerophosphocholine Esterase protein2-Acetyl-1-Alkylglycerophosphocholine Esterase proteinGroup-Viia Phospholipase A2 proteinGviia-Pla2 proteinLdl-Associated Phospholipase A2 proteinLdl-Pla(2 proteinPaf 2-Acylhydrolase proteinPLA2G7 proteinPAFAH protein |
Information sourced from Uniprot.org
