Enzymes
| UniProtKB help_outline | 182 proteins |
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- Name help_outline 1-O-alkyl-2-acyl-sn-glycerol Identifier CHEBI:52595 Charge 0 Formula C4H6O4R2 SMILEShelp_outline OC[C@@H](CO[*])OC([*])=O 2D coordinates Mol file for the small molecule Search links Involved in 17 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a 1,2-diacyl-sn-glycero-3-phosphocholine Identifier CHEBI:57643 Charge 0 Formula C10H18NO8PR2 SMILEShelp_outline [C@](COC(=O)*)(OC(=O)*)([H])COP(OCC[N+](C)(C)C)([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 325 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 1-O-alkyl-2,3-diacyl-sn-glycerol Identifier CHEBI:76585 Charge 0 Formula C5H5O5R3 SMILEShelp_outline [*]OC[C@H](COC([*])=O)OC([*])=O 2D coordinates Mol file for the small molecule Search links Involved in 18 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a 1-acyl-sn-glycero-3-phosphocholine Identifier CHEBI:58168 Charge 0 Formula C9H19NO7PR SMILEShelp_outline C[N+](C)(C)CCOP([O-])(=O)OC[C@H](O)COC([*])=O 2D coordinates Mol file for the small molecule Search links Involved in 218 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:78435 | RHEA:78436 | RHEA:78437 | RHEA:78438 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Positional specificity of lysosomal phospholipase A2.
Abe A., Hiraoka M., Shayman J.A.
Lysosomal phospholipase A(2) (Lpla2) is highly expressed in alveolar macrophages and may mediate the phospholipid metabolism of surfactant. Studies on the properties of this phospholipase are consistent with the presence of both phospholipase A(1) and phospholipase A(2) activities. These activitie ... >> More
Lysosomal phospholipase A(2) (Lpla2) is highly expressed in alveolar macrophages and may mediate the phospholipid metabolism of surfactant. Studies on the properties of this phospholipase are consistent with the presence of both phospholipase A(1) and phospholipase A(2) activities. These activities were studied through the production of O-acyl compounds, produced by the transacylase activity of Lpla2. Liposomes containing POPC and N-acetylsphingosine (NAS) were incubated with the soluble fraction obtained from MDCK cells stably transfected with the mouse Lpla2 gene. Two 1-O-acyl-NASs, 1-O-palmitoyl-NAS and 1-O-oleoyl-NAS, were produced by Lpla2. The formation rate of 1-O-oleoyl-NAS was 2.5-fold that of 1-O-palmitoyl-NAS. When 1-oleoyl-2-palmitoyl-sn-glycero-3-phosphocholine (OPPC) was used, the formation rate of 1-O-oleoyl-NAS was 5-fold higher than that of 1-O-palmitoyl-NAS. Thus, Lpla2 can act on acyl groups at both sn-1 and sn-2 positions of POPC and OPPC. When 1-palmitoyl-2-unsaturated acyl-sn-glycero-3-phosphocholines were used as acyl donors, the transacylation of the acyl group from the sn-2 position to NAS was preferred to that of the palmitoyl group from the sn-1 position. An exception was observed for 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (PAPC), for which the formation rate of 1-O-palmitoyl-NAS from PAPC was 4-fold greater than that of 1-O-arachidonoyl-NAS. Thus, Lpla2 has broad positional specificity for the sn-1 and sn-2 acyl groups in phosphatidylcholine and phosphatidylethanolamine. << Less
J. Lipid Res. 47:2268-2279(2006) [PubMed] [EuropePMC]
This publication is cited by 40 other entries.
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The acylation of lipophilic alcohols by lysosomal phospholipase A2.
Abe A., Hiraoka M., Shayman J.A.
A novel lysosomal phospholipase A(2) (LPLA2) with specificity toward phosphatidylethanolamine and phosphatidylcholine was previously purified and cloned. LPLA2 transfers sn-1 or sn-2 acyl groups of phospholipids to the C1 hydroxyl of the short-chain ceramide N-acetylsphingosine (NAS) under acidic ... >> More
A novel lysosomal phospholipase A(2) (LPLA2) with specificity toward phosphatidylethanolamine and phosphatidylcholine was previously purified and cloned. LPLA2 transfers sn-1 or sn-2 acyl groups of phospholipids to the C1 hydroxyl of the short-chain ceramide N-acetylsphingosine (NAS) under acidic conditions. The common features of lipophilic alcohols serving as acceptor molecules in the transacylase reaction were examined. 1-O-Hexadecyl-2-acetyl-sn-glycerol (HAG) was acylated by LPLA2 similar to NAS. HAG competed with NAS and inhibited NAS acylation. The transacylation of 1-O-hexadecyl-glycerol (HG), 1-O-palmityl-2-O-methyl-sn-glycerol (PMG), and monoacylglycerols was also investigated. HG, PMG, 1- or 3-palmitoyl-sn-glycerol, and 2-palmitoylglycerol were converted to 1,3-alkylacylglycerol, 1,2-dialkyl-3-acylglycerol, 1,3-diacylglycerol, and 1,2- or 2,3-diacylglycerol, respectively. HG and monoacylglycerol inhibited the acylation of NAS by the enzyme with IC(50) values of 35 and 45 microM, respectively. Additionally, the enzyme acylated glycerol to produce 1- or 3-acyl-sn-glycerol but not 2-acylglycerol. Therefore, the preferred acceptor molecules for LPLA2 are primary alcohols with one long carbon chain and one small nonpolar residue linked to the C2 position of ethanol. The enzyme acylated other natural lipophilic alcohols, including anandamide and oleoylethanolamide. Thus, LPLA2 may function to remodel acyl groups and modulate the biological and pharmacological activities of some lipophilic alcohols. << Less
J. Lipid Res. 48:2255-2263(2007) [PubMed] [EuropePMC]
This publication is cited by 38 other entries.