Reaction participants Show >> << Hide
- Name help_outline 1-hexadecanoyl-sn-glycero-3-phosphocholine Identifier CHEBI:72998 (CAS: 14863-27-5) help_outline Charge 0 Formula C24H50NO7P InChIKeyhelp_outline ASWBNKHCZGQVJV-HSZRJFAPSA-N SMILEShelp_outline [C@@H](COC(=O)CCCCCCCCCCCCCCC)(COP(OCC[N+](C)(C)C)(=O)[O-])O 2D coordinates Mol file for the small molecule Search links Involved in 77 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a 1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine Identifier CHEBI:36707 Charge 0 Formula C10H21NO7PR SMILEShelp_outline CC(=O)O[C@H](CO[*])COP([O-])(=O)OCC[N+](C)(C)C 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 1-hexadecanoyl-2-acetyl-sn-glycero-3-phosphocholine Identifier CHEBI:75219 (CAS: 84062-61-3) help_outline Charge 0 Formula C26H52NO8P InChIKeyhelp_outline XPAXRSJGGFVTFM-RUZDIDTESA-N SMILEShelp_outline CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(C)=O 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 1-O-alkyl-sn-glycero-3-phosphocholine Identifier CHEBI:30909 Charge 0 Formula C8H19NO6PR SMILEShelp_outline C[N+](C)(C)CCOP([O-])(=O)OC[C@H](O)CO[*] 2D coordinates Mol file for the small molecule Search links Involved in 42 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:53636 | RHEA:53637 | RHEA:53638 | RHEA:53639 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Hydrolysis and transesterification of platelet-activating factor by lecithin-cholesterol acyltransferase.
Liu M., Subbaiah P.V.
Purified lecithin-cholesterol acyltransferase (LCAT, EC 2.3.1.43) from human plasma was found to hydrolyze platelet-activating factor (PAF) to lyso-PAF and acetate. In addition, it catalyzed the transfer of the acetate group from PAF to lysophosphatidylcholine, forming lyso-PAF and a 1-acyl analog ... >> More
Purified lecithin-cholesterol acyltransferase (LCAT, EC 2.3.1.43) from human plasma was found to hydrolyze platelet-activating factor (PAF) to lyso-PAF and acetate. In addition, it catalyzed the transfer of the acetate group from PAF to lysophosphatidylcholine, forming lyso-PAF and a 1-acyl analog of PAF. In contrast to the cholesterol-esterification reaction carried out by the enzyme, the hydrolysis and transacetylation of PAF by LCAT did not require an apoprotein activator and were not inhibited by sulfhydryl inhibitors but were inhibited by serum albumin. When added to a proteoliposome substrate of LCAT or to whole plasma, PAF inhibited cholesterol esterification by LCAT competitively. PAF acetylhydrolase (EC 3.1.1.47), purified from human plasma, also catalyzed the transfer of acetate from PAF to lysophosphatidylcholine. However, the LCAT-catalyzed reactions of PAF were not due to contamination with PAF acetylhydrolase, since the ratio of acetyl transfer to acetyl hydrolysis was 3 times greater for LCAT, when compared with PAF acetylhydrolase under identical conditions. Furthermore, recombinant human LCAT secreted by baby hamster kidney cells also catalyzed the hydrolysis and transacetylation of PAF. These results demonstrate that LCAT can inactivate PAF in plasma by transacetylation and suggest that it may have a role in the metabolism of PAF, and possibly of oxidized phospholipids, in plasma. << Less
Proc. Natl. Acad. Sci. U.S.A. 91:6035-6039(1994) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.