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Legend: Newly synthesized acyl-CoAs (shown in green) are exported from the plastid to the endoplasmic reticulem (ER) membrane where they join a larger acyl-CoA pool. A series of reactions adds the fatty acids to a glycerol backbone to form triacylglycerol (TAG). TAG molecules coalesce to form oildroplets that bud out of the ER membrane. Additional reactions integrate the synthesis of TAG with that of phosphatidylcholine (PC), an important membrane lipid. Fatty acids can be further desaturated when they are part of the PC pool.
Abbreviations: CCT, choline-phosphate cytidylyltransferase; CK, choline kinase; DAG, diacylglycerol; DAG-CPT, diacylglycerol cholinephosphotransferase; DAGTA, diacylglycerol transacylase; DGAT, acyl-CoA: diacylglycerol acyltransferase; DHAP, dihydroxyacetone phosphate; FAD2, oleate desaturase; FAD3, linoleate desaturase; G3P, glycerol-3-phosphate; GPAT, glycerol-3-phosphate acyltransferase; GPDH, glycerol-3-phosphate dehydrogenase; LPA, 2-lysophosphatidic acid; LPAAT, 2-lysophosphatidic acid acyltransferase; LPC, 2-lysophosphatidylcholine; LPCAT, 2-lysophosphatidylcholine acyltransferase; MAG, monoacylglycerol; MAGAT, monoacylglycerol acyltransferase; PA, phosphatidic acid; PDAT, phospholipid:diacylglycerol acyltransferase; PDCT, phosphatidylcholine:diacylglycerol cholinephosphotransferase; PLA2, phospholipase A2; PP, phosphatidate phosphatase. Triacylglycerol Biosynthesis
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Pathways- Home
- Fatty Acid Synth
- Plast FAE & Desat
- Prok Gal/Sulpho I
- Prok Gal/Sulpho II
- Euk Gal/Sulpho
- TAG Synthesis
- Euk Phospholipid
- TAG Degradation
- FA Elong & Wax
- Sphingolipid I
- Sphingolipid II
- Mito FAS & Lipoic
- Mito LipoPolSach
- Mito Phospholipid
- Trafficking
- Cutin I
- Cutin II
- Suberin I
- Suberin II
- Suberin III
- Oxylipin I
- Oxylipin II
- Signaling
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Enzyme/Protein
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& composition - Mutants
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