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Pathway Description
Glycerol Metabolism
Saccharomyces cerevisiae
Metabolic Pathway
The glycerol metabolism begins with the reversible reaction of 3-phosphoglyceric acid to glyceric acid through a D-glycerate 3-kinase. Glyceric acid then reacts with a NADH driven aldehyde dehydrogenase resulting in the release of water and glyceraldehyde. Glyceraldehyde is then turned to glycerol through an alcohol dehydrogenase.
Glycerol can then either react in a reversible reaction with a glycerol dehydrogenase resulting in the release of dihydroxyacetone. On the other hand glycerol can be phosphorylated through a glycerol kinase resulting in the release of glycerol 3 phosphate. Both glycerol 3 phosphate and dihydroxyacetone lead to the production of 1-oleyl-2-lyso-phosphatidate. Dihydroxyacetone is then phosphorylated through a dihydroxyacetone kinase resulting in the release of glycerone phosphate. Glycerone phosphate reacts with oleoyl-CoA (an acyl-CoA) through a glycerol-3-phosphate O-acyltransferase resulting in the release of 1-oleoyl-2-lyso-glycerone phosphate.
Glycerol 3 phosphate can go back to a glycerol through a glycerol 3-phosphatase. It can also be react with a oleoyl-CoA through a glycerol-3-phosphate O-acyltransferase resulting in the release of 1-oleyl-2-lyso-phosphatidate. This compound reacts with an oleoyl-CoA through a Lysophosphatidic acid:oleoyl-CoA acyltransferase resulting in the release of a dioleoyl phosphatidate
References
Glycerol Metabolism References
Albertyn J, van Tonder A, Prior BA: Purification and characterization of glycerol-3-phosphate dehydrogenase of Saccharomyces cerevisiae. FEBS Lett. 1992 Aug 17;308(2):130-2.
Pubmed: 1499720
Athenstaedt K, Daum G: 1-Acyldihydroxyacetone-phosphate reductase (Ayr1p) of the yeast Saccharomyces cerevisiae encoded by the open reading frame YIL124w is a major component of lipid particles. J Biol Chem. 2000 Jan 7;275(1):235-40.
Pubmed: 10617610
Athenstaedt K, Daum G: Tgl4p and Tgl5p, two triacylglycerol lipases of the yeast Saccharomyces cerevisiae are localized to lipid particles. J Biol Chem. 2005 Nov 11;280(45):37301-9. doi: 10.1074/jbc.M507261200. Epub 2005 Aug 31.
Pubmed: 16135509
Athenstaedt K, Daum G: Biosynthesis of phosphatidic acid in lipid particles and endoplasmic reticulum of Saccharomyces cerevisiae. J Bacteriol. 1997 Dec;179(24):7611-6.
Pubmed: 9401016
Carman GM, Han GS: Regulation of phospholipid synthesis in the yeast Saccharomyces cerevisiae. Annu Rev Biochem. 2011;80:859-83. doi: 10.1146/annurev-biochem-060409-092229.
Pubmed: 21275641
Zheng Z, Zou J: The initial step of the glycerolipid pathway: identification of glycerol 3-phosphate/dihydroxyacetone phosphate dual substrate acyltransferases in Saccharomyces cerevisiae. J Biol Chem. 2001 Nov 9;276(45):41710-6. doi: 10.1074/jbc.M104749200. Epub 2001 Sep 5.
Pubmed: 11544256
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