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- 12Phosphatidylcholine
- 10Triacylglycerol
- 7Triacylglycerol biosynthesis
- 4Linum usitatissimum
- 3Brassica napus
- 14Chen, Guanqun
- 12Xu, Yang
- 9Weselake, Randall J.
- 7Caldo, Kristian Mark P.
- 5Mietkiewska, Elzbieta
- 5Pan, Xue
- 19Agricultural, Food and Nutritional Science, Department of
- 19Agricultural, Food and Nutritional Science, Department of/Journal Articles (Agricultural, Food and Nutritional Science)
- 12Graduate and Postdoctoral Studies (GPS), Faculty of
- 12Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 1Biological Sciences, Department of
- 1Biological Sciences, Department of/Journal Articles (Biological Sciences)
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Functional Characterization of Plant Patatin-like Phospholipase A III in Transgenic Arabidopsis thaliana Producing 18 Carbon Hydroxy Fatty Acids
DownloadFall 2016
Hydroxy fatty acid (HFA)-enriched oils are valuable in many oleo-chemical industries. The major natural source of HFA, however, is castor (Ricinus communis) seed, which is poisonous to human beings and animals. Although over-expressing a castor OLEATE 12-HYDROXYLASE (RcFAH12) in Arabiodpsis...
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High-performance variants of plant diacylglycerol acyltransferase 1 generated by directed evolution provide insights into structure function
Download2017-09-10
Chen, Guanqun, Vanhercke, Thomas, Chen, Yongyan, Mietkiewska, Elzbieta, Siloto, Rodrigo M. P., Niesner, Nathalie, Xu, Yang, Caldo, Kristian Mark P., Weselake, Randall J., El Tahchy, Anna
Diacylglycerol acyltransferase 1 (DGAT1) catalyzes the acyl-CoA-dependent biosynthesis of triacylglycerol, the predominant component of seed oil. In some oil crops, including Brassica napus, the level of DGAT1 activity can have a substantial effect on triacylglycerol production....
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Identification of a pair of phospholipid:diacylglycerol acyltransferases from developing flax (Linum usitatissiumum L.) seed catalyzing the selective production of trilinolenin
Download2013
Wickramarathna, Aruna D., Siloto, Rodrigo M. P., Mietkiewska, Elzbieta, Pan, Xue, Weselake, Randall J.
The oil from flax (Linum usitatissimum L.) has high amounts of α-linolenic acid (ALA; 18:3cisΔ9,12,15) and is one of the richest sources of omega-3 polyunsaturated fatty acids (ω-3-PUFAs). To produce ∼57% ALA in triacylglycerol (TAG), it is likely that flax contains enzymes that can efficiently...
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Impaired de novo choline synthesis explains why phosphatidylethanolamine N-methyltransferase-deficient mice are protected from diet-induced obesity
Download2010
Kuo, Ming-Shang, Dyck, Jason R. B., Sletten, Torunn, Proctor, Spencer D., Jacobs, René L., Lingrell, Susanne, Cao, Guoqing, Peake, David A., Kennedy, Brian P., Zhao, Yang, Vance, Dennis E., Koonen, Debby P. Y., Su, Brian
Phosphatidylcholine (PC) is synthesized from choline via the CDP-choline pathway. Liver cells can also synthesize PC via the sequential methylation of phosphatidylethanolamine, catalyzed by phosphatidylethanolamine N-methyltransferase (PEMT). The current study investigates whether or not hepatic...
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Spring 2013
Egg yolk contains approximately 10% (w/w) phospholipids (PL), of which about 70% is phosphatidylcholine (PC). Conventional methods of PL extraction from egg yolk involve using hazardous organic solvents. Supercritical carbon dioxide (SC-CO2), as a "green" solvent, had been applied for the...
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In vivo and in vitro evidence for biochemical coupling of reactions catalyzed by lysophosphatidylcholine acyltransferase and diacyglycerol acyltransferase
Download2015
Greer, Michael S., Pan, Xue, Weselake, Randall J., Chen, Guanqun, Zou, Jitao, Caldo, Kristian Mark P., Kazachkov, Michael
Seed oils of flax (Linum usitatissimum L.) and many other plant species contain substantial amounts of polyunsaturated fatty acids (PUFAs). Phosphatidylcholine (PC) is the major site for PUFA synthesis. The exact mechanisms of how these PUFAs are channeled from PC into triacylglycerol (TAG) needs...
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Insights into the role of CTP:phosphocholine cytidylyltransferase-alpha in hepatic lipid metabolism and cellular integrity
DownloadFall 2011
Lower levels of hepatic phosphatidylcholine (PC) are suggested to play a role in the pathogenesis of non-alcoholic steatohepatitis (NASH). Mice lacking hepatic CTP:phosphocholine cytidylyltransferase-α (LCTα-/-), the regulatory enzyme in the CDP-choline pathway for PC biosynthesis, were fed a...
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Insights into the Transcriptional Regulation and Physiological Importance of Phosphatidylethanolamine N-Methyltransferase
DownloadSpring 2010
Phosphatidylcholine (PC) is made in all nucleated mammalian cells via the CDP-choline pathway. Another major pathway for PC biosynthesis in liver is catalyzed by phosphatidylethanolamine N-methyltransferase (PEMT). We have identified 3T3-L1 adipocytes as a cell culture model that expresses PEMT...
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Kinetic improvement of an algal diacylglycerol acyltransferase 1 via fusion with an acyl-CoA binding protein
Download2020-01-01
Xu, Yang, Caldo, Kristian Mark P., Falarz, Lucas, Jayawardhane, Kethmi, Chen, Guanqun
SUMMARY Microalgal oils in the form of triacylglycerols (TAGs) are broadly used as nutritional supplements and biofuels. Diacylglycerol acyltransferase (DGAT) catalyzes the final step of acyl-CoA-dependent biosynthesis of TAG and is considered a key target for manipulating oil production....
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Multiple mechanisms contribute to increased neutral lipid accumulation in yeast producing recombinant variants of plant diacylglycerol acyltransferase 1
Download2017-09-01
Shah, Saleh, Xu, Yang, Ramakrishnan, Geetha, Caldo, Kristian Mark P., Chen, Guanqun, Ozga, Jocelyn, Greer, Michael S., Lemieux, M. Joanne, Wu, Limin, Weselake, Randall J.
The apparent bottleneck in the accumulation of oil during seed development in some oleaginous plant species is the formation of triacylglycerol (TAG) by the acyl-CoA-dependent acylation of sn-1,2- diacylglycerol catalyzed by diacylglycerol acyltransferase (DGAT, EC 2.3.1.20). Improving DGAT...