The aminoglycerophospholipids of eukaryotic cells, phosphatidylserine (PtdSer), phosphatidylethanolamine (PtdEtn), and phosphatidylcholine (PtdCho), can be synthesized by multiple pathways. The PtdSer pathway encompasses the synthesis of PtdSer, its decarboxylation to PtdEtn and subsequent methylation reactions to form PtdCho. The Kennedy pathways consist of the synthesis of PtdEtn and PtdCho from Etn and Cho precursors via CDP-Etn and CDP-Cho intermediates. The reactions along the PtdSer pathway are spatially segregated with PtdSer synthesis occurring in the endoplasmic reticulum or mitochondria-associated membrane (MAM), PtdEtn formation occurring in the mitochondria and Golgi/vacuole compartments and PtdCho formation occurring in the endoplasmic reticulum or MAM. The organelle-specific metabolism of the different lipids in the PtdSer pathway has provided a convenient biochemical means for defining events in the interorganelle transport of the aminoglycerophospholipids in intact cells, isolated organelles and permeabilized cells. Studies with both mammalian cells and yeast demonstrate many significant similarities in lipid transport processes between the two systems. Genetic experiments in yeast now provide the tools to create new strains with mutations along the PtdSer pathway that can be conditionally rescued by the Kennedy pathway reactions. The genetic studies in yeast indicate that it is now possible to begin to define genes that participate in the interorganelle transport of the aminoglycerophospholipids.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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