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Skip to Search Results- 9Chen, Guanqun
- 6Ozga, Jocelyn
- 6Weselake, Randall J.
- 6Xu, Yang
- 5Mietkiewska, Elzbieta
- 4Caldo, Kristian Mark P.
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Arabidopsis GPAT9 contributes to synthesis of intracellular glycerolipids but not surface lipids
Download2016
Jayawardhane, Kethmi, Tomasi, Pernell, Dyer, John M., Weselake, Randall J., Mietkiewska, Elzbieta, Singer, Stacy D., Chen, Guanqun
GLYCEROL-3-PHOSPHATE ACYLTRANSFERASE (GPAT) genes encode enzymes involved in glycerolipid biosynthesis in plants. Ten GPAT homologues have been identified in Arabidopsis. GPATs 4–8 have been shown to be involved in the production of extracellular lipid barrier polyesters. Recently, GPAT9 was...
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Engineering Arabidopsis long-chain acyl-CoA synthetase 9 variants with enhanced enzyme activity
Download2018-12-17
Xu, Yang, Caldo, Kristian Mark P., Holic, Roman, Mietkiewska, Elzbieta, Ozga, Jocelyn, Rizvi, Syed Masood, Chen, Guanqun, Weselake, Randall
Long-chain acyl-CoA synthetase (LACS, EC 6.2.1.3) catalyzes the ATP-dependent activation of free fatty acid to form acyl-CoA, which in turn serves as the major acyl donor for various lipid metabolic pathways. Increasing the size of acyl-CoA pool by enhancing LACS activity appears to be a useful...
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Enhancement of total lipid production in vegetative tissues of alfalfa and sainfoin using chemical mutagenesis
Download2019-12-31
Wijekoon, Champa P., Singer, Stacy D., Weselake, Randall J., Petrie, James R., Singh, Surinder, Jayawardhane, Kethmi N., Shah, Saleh, Chen, Guanqun, Eastmond, Peter J., Acharya, Surya N.
Alfalfa (Medicago sativa L.) and sainfoin (Onobrychis viciifoila Scop.) are two key forage legumes for the western Canadian cattle industry. Despite the high protein content, drawbacks to their use exists, including inefficient protein digestibility and energy use efficiency in the ruminant...
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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...
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Physaria fendleri and Ricinus communis LCAT-like phospholipases selectively cleave hydroxy acyl chains from phosphatidylcholine
Download2020-10-27
Xu, Yang, Caldo, Kristian Mark P., Singer, Stacy D., Mietkiewska, Elzbieta, Greer, Michael S., Tian, Bo, Dyer, John M., Smith, Mark, Zhou, Xue-Rong, Qiu, Xiao, Weselake, Randall J., Chen, Guanqun
Producing hydroxy fatty acids (HFAs) in transgenic crops represents a promising strategy to meet our demands for specialized plant oils with industrial applications. The expression of Ricinus communis (castor) OLEATE 12-HYDROXYLASE (RcFAH12) in Arabidopsis has resulted in only...
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Plant acyl-CoA:lysophosphatidylcholine acyltransferases (LPCATs) have different specificities in their forward and reverse reactions
Download2013
Heinz, Ernst, Zhou, Xue-Rong, Banas, Antoni, Green, Allan, Jasieniecka, Katarzyna, Weselake, Randall, Smith, Mark A., Stymne, Sten, Bayon, Shen, Zou, Jitao, Lager, Ida, Dyer, John M., Shockey, Jay M., Yilmaz, Jenny L., Wang, Peng, Kazachkov, Michael
Acyl-CoA:lysophosphatidylcholine acyltransferase (LPCAT) enzymes have central roles in acyl editing of phosphatidylcholine (PC). Plant LPCAT genes were expressed in yeast and characterized biochemically in microsomal preparations of the cells. Specificities for different acyl-CoAs were similar...
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Properties and Biotechnological Applications of Acyl‐CoA:diacylglycerol Acyltransferase and Phospholipid:diacylglycerol Acyltransferase from Terrestrial Plants and Microalgae
Download2018-07-30
Xu, Yang, Caldo, Kristian Mark P., Pal‐Nath, Dipasmita, Ozga, Jocelyn, Lemieux, M. Joanne, Weselake, Randall J., Chen, Guanqun
Triacylglycerol (TAG) is the major storage lipid in most terrestrial plants and microalgae, and has great nutritional and industrial value. Since the demand for vegetable oil is consistently increasing, numerous studies have been focused on improving the TAG content and modifying the fatty‐acid...
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Substrate preferences of long-chain acyl-CoA synthetase and diacylglycerol acyltransferase contribute to enrichment of flax seed oil with a-linolenic acid
Download2018-04-01
Xu, Yang, Holic, Roman, Li, Darren, Pan, Xue, Mietkiewska, Elzbieta, Chen, Guanqun, Ozga, Jocelyn, Weselake, Randall J.
Seed oil from flax (Linum usitatissimum) is enriched in a-linolenic acid (ALA; 18:3?9cis,12cis,15cis), but the biochemical processes underlying the enrichment of flax seed oil with this polyunsaturated fatty acid are not fully elucidated. Here, a potential process involving the catalytic actions...
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Substrate preferences of long-chain acyl-CoA synthetase and diacylglycerol acyltransferase contribute to enrichment of flax seed oil with α -linolenic acid
Download2018-01-01
Xu, Yang, Holic, Roman, Li, Darren, Mietkiewska, Elzbieta, Chen, Guanqun, Ozga, Jocelyn, Weselake, Randall
Seed oil from flax ( Linum usitatissimum ) is enriched in α -linolenic acid (ALA; 18:3 Δ 9 cis ,12 cis ,15 cis) but the biochemical processes underlying the enrichment of flax seed oil with this polyunsaturated fatty acid are not fully elucidated. Here, a potential process involving the catalytic...
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The potential of genome editing for improving seed oil content and fatty acid composition in oilseed crops
Download2020-08-27
Subedi, Udaya, Jayawardhane, Kethmi N., Pan, Xue, Ozga, Jocelyn, Chen, Guanqun, Foroud, Nora A., Singer, Stacy D.
A continuous rise in demand for vegetable oils, which comprise mainly the storage lipid triacylglycerol, is fueling a surge in research efforts to increase seed oil content and improve fatty acid composition in oilseed crops. Progress in this area has been achieved using both conventional...