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- W1553913360 endingPage "6840" @default.
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- W1553913360 abstract "Bis(monoacylglycero)phosphate (BMP) has the unique stereoconfiguration of 3-acyl-sn-glycero-1-phosphoryl-1'-sn-[3'-acylglycerol] (Brotherus, J., Renkonen, O., Herrmann, J., and Fischer, W. (1974) Chem. Phys. Lipids 13, 178-182) which differs from other known mammalian phospholipids that have the sn-glycero-3-phosphoryl configuration. This stereochemistry may contribute to its physiologic function. Here we describe studies using the macrophage-like cell line RAW 264.7 designed to determined how this unique stereoconfiguration occurs. These studies show that the stereoconfiguration of BMP produced from exogenous phosphatidylglycerol (PG) by RAW 264.7 cells has the expected stereoconfiguration of 3-acyl-sn-glycero-1-phosphoryl-1'-sn-[3'-acylglycerol]. Experiments using diacyl-sn-[2-3H]glycero-3-phosphoryl-sn-1'-[2-3H]glycerol demonstrate that this unique stereoconfiguration is not produced due to an oxidation/reduction mechanism involving the sn-2-glycerol carbon. When dioleoyl-sn-[1-14C]glycero-3-phosphoryl-rac-glycerol was converted to 14C-labeled BMP, the 14C label was found esterified to the phosphate moiety. These results suggest that a stereospecific enzyme is capable of reorienting the radiolabeled glycerol backbone of this PG substrate, effectively changing the stereochemistry of the lipid. We also show that this enzyme is stereoselective with regard to the base glycerol moiety of the substrate PG used. Finally, we propose a new pathway for the synthesis of BMP from PG." @default.
- W1553913360 created "2016-06-24" @default.
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- W1553913360 date "1991-04-01" @default.
- W1553913360 modified "2023-10-17" @default.
- W1553913360 title "Glycerol reorientation during the conversion of phosphatidylglycerol to bis(monoacylglycerol)phosphate in macrophage-like RAW 264.7 cells." @default.
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- W1553913360 doi "https://doi.org/10.1016/s0021-9258(20)89576-3" @default.
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