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Pathway Description
De Novo Triacylglycerol Biosynthesis TG(18:0/18:2(9Z,12Z)/18:2(9Z,12Z))
Drosophila melanogaster
Category:
Metabolite Pathway
Sub-Category:
Metabolic
Created: 2018-08-19
Last Updated: 2019-12-10
A triglyceride (TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids. Triglycerides are the main constituents of body fat in humans and other animals, as well as vegetable fat (Wikipedia). De novo biosynthesis of triglycerides is also known as the phosphatidic acid pathway. All membrane-localized enzymes are coloured dark green in the image. First, dihydroxyacetone phosphate (or glycerone phosphate) from glycolysis is used by the cytoplasmic enzyme glycerol-3-phosphate dehydrogenase [NAD(+)] to synthesize sn-glycerol 3-phosphate. Second, the mitochondrial outer membrane enzyme glycerol-3-phosphate acyltransferase esterifies an acyl-group to the sn-1 position of sn-glycerol 3-phosphate to form 1-acyl-sn-glycerol 3-phosphate (lysophosphatidic acid or LPA). The next three steps are localized to the endoplasmic reticulum membrane. The enzyme 1-acyl-sn-glycerol-3-phosphate acyltransferase converts LPA into phosphatidic acid (1,2-diacyl-sn-glycerol 3-phosphate) by esterifying an acyl-group to the sn-2 position of the glycerol backbone. Next, phosphatidate phosphatase catalyzes the conversion of phosphatidic acid into diacylglycerol. Last, the enzyme diacylglycerol O-acyltransferase synthesizes triacylglycerol from diacylglycerol and a fatty acyl-CoA.
References
De Novo Triacylglycerol Biosynthesis TG(18:0/18:2(9Z,12Z)/18:2(9Z,12Z)) References
Lehner R, Kuksis A: Biosynthesis of triacylglycerols. Prog Lipid Res. 1996;35(2):169-201.
Pubmed: 8944226
Parisi M, Li R, Oliver B: Lipid profiles of female and male Drosophila. BMC Res Notes. 2011 Jun 15;4:198. doi: 10.1186/1756-0500-4-198.
Pubmed: 21676256
Yang Y, Hou ZC, Qian YH, Kang H, Zeng QT: Increasing the data size to accurately reconstruct the phylogenetic relationships between nine subgroups of the Drosophila melanogaster species group (Drosophilidae, Diptera). Mol Phylogenet Evol. 2012 Jan;62(1):214-23. doi: 10.1016/j.ympev.2011.09.018. Epub 2011 Sep 29.
Pubmed: 21985965
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Pubmed: 10731132
Celniker SE, Wheeler DA, Kronmiller B, Carlson JW, Halpern A, Patel S, Adams M, Champe M, Dugan SP, Frise E, Hodgson A, George RA, Hoskins RA, Laverty T, Muzny DM, Nelson CR, Pacleb JM, Park S, Pfeiffer BD, Richards S, Sodergren EJ, Svirskas R, Tabor PE, Wan K, Stapleton M, Sutton GG, Venter C, Weinstock G, Scherer SE, Myers EW, Gibbs RA, Rubin GM: Finishing a whole-genome shotgun: release 3 of the Drosophila melanogaster euchromatic genome sequence. Genome Biol. 2002;3(12):RESEARCH0079. doi: 10.1186/gb-2002-3-12-research0079. Epub 2002 Dec 23.
Pubmed: 12537568
Misra S, Crosby MA, Mungall CJ, Matthews BB, Campbell KS, Hradecky P, Huang Y, Kaminker JS, Millburn GH, Prochnik SE, Smith CD, Tupy JL, Whitfied EJ, Bayraktaroglu L, Berman BP, Bettencourt BR, Celniker SE, de Grey AD, Drysdale RA, Harris NL, Richter J, Russo S, Schroeder AJ, Shu SQ, Stapleton M, Yamada C, Ashburner M, Gelbart WM, Rubin GM, Lewis SE: Annotation of the Drosophila melanogaster euchromatic genome: a systematic review. Genome Biol. 2002;3(12):RESEARCH0083. doi: 10.1186/gb-2002-3-12-research0083. Epub 2002 Dec 31.
Pubmed: 12537572
Zhang N, Zhang J, Purcell KJ, Cheng Y, Howard K: The Drosophila protein Wunen repels migrating germ cells. Nature. 1997 Jan 2;385(6611):64-7. doi: 10.1038/385064a0.
Pubmed: 8985246
This pathway was generated using PathWhiz -
Pon, A. et al. Pathways with PathWhiz (2015) Nucleic Acids Res. 43(Web Server issue): W552–W559.
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