keyword
MENU ▼
Read by QxMD icon Read
search

DGAT

keyword
https://www.readbyqxmd.com/read/28103313/mycobacterium-marinum-degrades-both-triacylglycerols-and-phospholipids-from-its-dictyostelium-host-to-synthesise-its-own-triacylglycerols-and-generate-lipid-inclusions
#1
Caroline Barisch, Thierry Soldati
During a tuberculosis infection and inside lipid-laden foamy macrophages, fatty acids (FAs) and sterols are the major energy and carbon source for Mycobacterium tuberculosis. Mycobacteria can be found both inside a vacuole and the cytosol, but how this impacts their access to lipids is not well appreciated. Lipid droplets (LDs) store FAs in form of triacylglycerols (TAGs) and are energy reservoirs of prokaryotes and eukaryotes. Using the Dictyostelium discoideum/Mycobacterium marinum infection model we showed that M...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28078675/overexpression-of-a-diacylglycerol-acyltransferase-gene-in-phaeodactylum-tricornutum-directs-carbon-towards-lipid-biosynthesis
#2
Jorge Dinamarca, Orly Levitan, G K Kumaraswamy, Desmond S Lun, Paul Falkowski
Under nutrient deplete conditions, diatoms accumulate between 15 to 25% of their dry weight as lipids, primarily as triacylglycerols (TAGs). As in most eukaryotes, these organisms produce TAGs via the acyl-CoA dependent Kennedy pathway. The last step in this pathway is catalyzed by diacylglycerol acyltransferase (DGAT) that acylates diacylglycerol (DAG) to produce TAG. To test our hypothesis that DGAT plays a major role in controlling the flux of carbon towards lipids, we overexpressed a specific type II DGAT gene, DGAT2D, in the model diatom Phaeodactylum tricornutum...
January 12, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28070221/nannochloropsis-a-rich-source-of-diacylglycerol-acyltransferases-for-engineering-of-triacylglycerol-content-in-different-hosts
#3
Krzysztof Zienkiewicz, Agnieszka Zienkiewicz, Eric Poliner, Zhi-Yan Du, Katharina Vollheyde, Cornelia Herrfurth, Sofia Marmon, Eva M Farré, Ivo Feussner, Christoph Benning
BACKGROUND: Photosynthetic microalgae are considered a viable and sustainable resource for biofuel feedstocks, because they can produce higher biomass per land area than plants and can be grown on non-arable land. Among many microalgae considered for biofuel production, Nannochloropsis oceanica (CCMP1779) is particularly promising, because following nutrient deprivation it produces very high amounts of triacylglycerols (TAG). The committed step in TAG synthesis is catalyzed by acyl-CoA:diacylglycerol acyltransferase (DGAT)...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/27881664/lipid-disequilibrium-disrupts-er-proteostasis-by-impairing-erad-substrate-glycan-trimming-and-dislocation
#4
Milton To, Clark W H Peterson, Melissa A Roberts, Jessica L Counihan, Tiffany T Wu, Mercedes S Forster, Daniel K Nomura, James A Olzmann
The endoplasmic reticulum (ER) mediates the folding, maturation, and deployment of the secretory proteome. Proteins that fail to achieve their native conformation are retained in the ER and targeted for clearance by ER-associated degradation (ERAD), a sophisticated process that mediates the ubiquitin-dependent delivery of substrates to the 26S proteasome for proteolysis. Recent findings indicate that inhibition of long-chain acyl-CoA synthetases with triacsin C, a fatty acid analogue, impairs lipid droplet (LD) biogenesis and ERAD, suggesting a role for LDs in ERAD...
January 15, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/27788579/inhibition-of-diacylglycerol-transferase-1-has-potent-antiviral-effect-on-hepatitis-c-virus-in-vitro-but-not-in-patients-in-a-randomized-trial
#5
Edward Gane, Catherine Stedman, Kiran Dole, Jin Chen, Charles Daniel Meyers, Brigitte Wiedmann, Jin Zhang, Prakash Raman, Richard A Colvin
Hepatitis C virus (HCV) infection is a significant cause of liver disease affecting 80-150 million people globally. Diacylglycerol transferase-1 (DGAT-1), a triglyceride synthesis enzyme, is important for the HCV life-cycle in vitro. Pradigastat, a potent DGAT-1 inhibitor found to lower triglycerides and HgbA1c in patients, was investigated for safety and efficacy in patients with HCV. This was a two-part study. In the in vitro study, the effect of pradigastat on virus production was evaluated in infected cells in culture...
October 27, 2016: ACS Infectious Diseases
https://www.readbyqxmd.com/read/27780240/expression-of-soluble-forms-of-yeast-diacylglycerol-acyltransferase-2-that-integrate-a-broad-range-of-saturated-fatty-acids-in-triacylglycerols
#6
Nawel Haïli, Julien Louap, Michel Canonge, Franjo Jagic, Christelle Louis-Mondésir, Thierry Chardot, Pierre Briozzo
The membrane proteins acyl-CoA:diacylglycerol acyltransferases (DGAT) are essential actors for triglycerides (TG) biosynthesis in eukaryotic organisms. Microbial production of TG is of interest for producing biofuel and value-added novel oils. In the oleaginous yeast Yarrowia lipolytica, Dga1p enzyme from the DGAT2 family plays a major role in TG biosynthesis. Producing recombinant DGAT enzymes pure and catalytically active is difficult, hampering their detailed functional characterization. In this report, we expressed in Escherichia coli and purified two soluble and active forms of Y...
2016: PloS One
https://www.readbyqxmd.com/read/27706370/diversity-and-evolution-of-plant-diacylglycerol-acyltransferase-dgats-unveiled-by-phylogenetic-gene-structure-and-expression-analyses
#7
Andreia Carina Turchetto-Zolet, Ana Paula Christoff, Franceli Rodrigues Kulcheski, Guilherme Loss-Morais, Rogerio Margis, Marcia Margis-Pinheiro
Since the first diacylglycerol acyltransferase (DGAT) gene was characterized in plants, a number of studies have focused on understanding the role of DGAT activity in plant triacylglycerol (TAG) biosynthesis. DGAT enzyme is essential in controlling TAGs synthesis and is encoded by different genes. DGAT1 and DGAT2 are the two major types of DGATs and have been well characterized in many plants. On the other hand, the DGAT3 and WS/DGAT have received less attention. In this study, we present the first general view of the presence of putative DGAT3 and WS/DGAT in several plant species and report on the diversity and evolution of these genes and its relationships with the two main DGAT genes (DGAT1 and DGAT2)...
October 2016: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/27627966/tlr4-mutant-mice-are-resistant-to-acute-alcohol-induced-sterol-regulatory-element-binding-protein-activation-and-hepatic-lipid-accumulation
#8
Zhi-Hui Zhang, Xiao-Qian Liu, Cheng Zhang, Wei He, Hua Wang, Yuan-Hua Chen, Xiao-Jing Liu, Xi Chen, De-Xiang Xu
Previous studies demonstrated that acute alcohol intoxication caused hepatic lipid accumulation. The present study showed that acute alcohol intoxication caused hepatic lipid accumulation in Tlr4-wild-type mice but not in Tlr4-mutant mice. Hepatic sterol-regulatory element binding protein (SREBP)-1, a transcription factor regulating fatty acid and triglyceride (TG) synthesis, was activated in alcohol-treated Tlr4-wild-type mice but not in Tlr4-mutant mice. Hepatic Fas, Acc, Scd-1 and Dgat-2, the key genes for fatty acid and TG synthesis, were up-regulated in alcohol-treated Tlr4-wild-type mice but not in Tlr4-mutant mice...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27578203/a-vernonia-diacylglycerol-acyltransferase-can-increase-renewable-oil-production
#9
Tomoko Hatanaka, William Serson, Runzhi Li, Paul Armstrong, Keshun Yu, Todd Pfeiffer, Xi-Le Li, David Hildebrand
Increasing the production of plant oils such as soybean oil as a renewable resource for food and fuel is valuable. Successful breeding for higher oil levels in soybean, however, usually results in reduced protein, a second valuable seed component. This study shows that by manipulating a highly active acyl-CoA:diacylglycerol acyltransferase (DGAT) the hydrocarbon flux to oil in oilseeds can be increased without reducing the protein component. Compared to other plant DGATs, a DGAT from Vernonia galamensis (VgDGAT1A) produces much higher oil synthesis and accumulation activity in yeast, insect cells, and soybean...
September 28, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27546480/effect-of-quercetin-on-hepatitis-c-virus-life-cycle-from-viral-to-host-targets
#10
Ángela Rojas, Jose A Del Campo, Sophie Clement, Matthieu Lemasson, Marta García-Valdecasas, Antonio Gil-Gómez, Isidora Ranchal, Birke Bartosch, Juan D Bautista, Arielle R Rosenberg, Francesco Negro, Manuel Romero-Gómez
Quercetin is a natural flavonoid, which has been shown to have anti hepatitis C virus (HCV) properties. However, the exact mechanisms whereby quercetin impacts the HCV life cycle are not fully understood. We assessed the effect of quercetin on different steps of the HCV life cycle in Huh-7.5 cells and primary human hepatocytes (PHH) infected with HCVcc. In both cell types, quercetin significantly decreased i) the viral genome replication; ii) the production of infectious HCV particles and iii) the specific infectivity of the newly produced viral particles (by 85% and 92%, Huh7...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27531967/diacylglycerol-acyltransferase-2-and-monoacylglycerol-acyltransferase-2-are-ubiquitinated-proteins-that-are-degraded-by-the-26s-proteasome
#11
Curtis Brandt, Pamela J McFie, Scot J Stone
Acyl-CoA:1,2-diacylglycerol acyltransferase (DGAT)-2 is one of the two DGAT enzymes that catalyzes the synthesis of triacylglycerol, which is an important form of stored energy for eukaryotic organisms. There is currently limited information available regarding how DGAT2 and triacylglycerol synthesis are regulated. Recent studies have indicated that DGAT2 can be regulated by changes in gene expression. How DGAT2 is regulated post-transcriptionally remains less clear. In this study, we demonstrated that DGAT2 is a very unstable protein and is rapidly degraded in an ubiquitin-dependent manner via the proteasome...
October 15, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27506614/overexpression-of-diacylglycerol-acyltransferase-in-yarrowia-lipolytica-affects-lipid-body-size-number-and-distribution
#12
Peter Gajdoš, Rodrigo Ledesma-Amaro, Jean-Marc Nicaud, Milan Čertík, Tristan Rossignol
In the oleaginous yeast Yarrowia lipolytica, the diacylglycerol acyltransferases (DGATs) are major factors for triacylglycerol (TAG) synthesis. The Q4 strain, in which the four acyltransferases have been deleted, is unable to accumulate lipids and to form lipid bodies (LBs). However, the expression of a single acyltransferase in this strain restores TAG accumulation and LB formation. Using this system, it becomes possible to characterize the activity and specificity of an individual DGAT. Here, we examined the effects of DGAT overexpression on lipid accumulation and LB formation in Y...
September 2016: FEMS Yeast Research
https://www.readbyqxmd.com/read/27474711/role-of-wax-ester-synthase-acyl-coenzyme-a-diacylglycerol-acyltransferase-in-oleaginous-streptomyces-sp-strain-g25
#13
Annika Röttig, Carl Simon Strittmatter, Jennifer Schauer, Sebastian Hiessl, Anja Poehlein, Rolf Daniel, Alexander Steinbüchel
UNLABELLED: Recently, we isolated a novel Streptomyces strain which can accumulate extraordinarily large amounts of triacylglycerol (TAG) and consists of 64% fatty acids (dry weight) when cultivated with glucose and 50% fatty acids (dry weight) when cultivated with cellobiose. To identify putative gene products responsible for lipid storage and cellobiose utilization, we analyzed its draft genome sequence. A single gene encoding a wax ester synthase/acyl coenzyme A (CoA):diacylglycerol acyltransferase (WS/DGAT) was identified and heterologously expressed in Escherichia coli The purified enzyme AtfG25 showed acyltransferase activity with C12- or C16-acyl-CoA, C12 to C18 alcohols, or dipalmitoyl glycerol...
October 1, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27345221/two-types-of-soybean-diacylglycerol-acyltransferases-are-differentially-involved-in-triacylglycerol-biosynthesis-and-response-to-environmental-stresses-and-hormones
#14
BeiBei Chen, Junejie Wang, Gaoyang Zhang, Jiaqi Liu, Sehrish Manan, Honghong Hu, Jian Zhao
Diacylglycerol acyltransferases (DGATs) play a key role in plant triacylglycerol (TAG) biosynthesis. Two type 1 and 2 DGATs from soybean were characterized for their functions in TAG biosynthesis and physiological roles. GmDGAT1A is highly expressed in seeds while GmDGAT2D is mainly expressed in flower tissues. They showed different expression patterns in response to biotic and abiotic stresses. GmDGAT2D was up-regulated by cold and heat stress and ABA signaling, and repressed by insect biting and jasmonate, whereas GmDGAT1A show fewer responses...
June 27, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27274009/effect-of-pradigastat-a-diacylglycerol-acyltransferase-1-inhibitor-on-the-qtcf-interval-in-humans
#15
Charles D Meyers, Adele Noe, Atish Salunke, Aishwarya Movva, Kenneth Kulmatycki, Srikanth Neelakantham, Anne Crissey, Tapan Majumdar, Jin Chen
Pradigastat, a novel diacylglycerol acyltransferase 1 inhibitor, has been studied in familial chylomicronemia syndrome. To evaluate the effects of supratherapeutic concentrations of pradigastat on the QTc interval, 2 studies were conducted. The first study assessed the safety, tolerability, and pharmacokinetics of single escalating intravenous doses of pradigastat (10, 30, 100, and 115 mg over 60 minutes) in healthy adults. Single intravenous doses were safe, well tolerated, and at the higher doses resulted in supratherapeutic pradigastat exposure...
November 2016: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/27261001/a-genetic-screen-for-mutants-with-supersized-lipid-droplets-in-caenorhabditis-elegans
#16
Shiwei Li, Shibin Xu, Yanli Ma, Shuang Wu, Yu Feng, Qingpo Cui, Lifeng Chen, Shuang Zhou, Yuanyuan Kong, Xiaoyu Zhang, Jialei Yu, Mengdi Wu, Shaobing O Zhang
To identify genes that regulate the dynamics of lipid droplet (LD) size, we have used the genetically tractable model organism Caenorhabditis elegans, whose wild-type LD population displays a steady state of size with an upper limit of 3 μm in diameter. From a saturated forward genetic screen of 6.7 × 10(5) mutagenized haploid genomes, we isolated 118 mutants with supersized intestinal LDs often reaching 10 μm. These mutants define nine novel complementation groups, in addition to four known genes (maoc-1, dhs-28, daf-22, and prx-10)...
2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27249207/knockdown-of-triglyceride-synthesis-does-not-enhance-palmitate-lipotoxicity-or-prevent-oleate-mediated-rescue-in-rat-hepatocytes
#17
Alexandra K Leamy, Clinton M Hasenour, Robert A Egnatchik, Irina A Trenary, Cong-Hui Yao, Gary J Patti, Masakazu Shiota, Jamey D Young
Experiments in a variety of cell types, including hepatocytes, consistently demonstrate the acutely lipotoxic effects of saturated fatty acids, such as palmitate (PA), but not unsaturated fatty acids, such as oleate (OA). PA+OA co-treatment fully prevents PA lipotoxicity through mechanisms that are not well defined but which have been previously attributed to more efficient esterification and sequestration of PA into triglycerides (TGs) when OA is abundant. However, this hypothesis has never been directly tested by experimentally modulating the relative partitioning of PA/OA between TGs and other lipid fates in hepatocytes...
September 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27223895/acyl-coa-diacylglycerol-acyltransferase-1-expression-level-in-the-hematopoietic-compartment-impacts-inflammation-in-the-vascular-plaques-of-atherosclerotic-mice
#18
Nemanja Vujic, Jess Porter Abate, Stefanie Schlager, Tovo David, Dagmar Kratky, Suneil K Koliwad
The final step of triacylglycerol synthesis is catalyzed by acyl-CoA:diacylglycerol acyltransferases (DGATs). We have previously shown that ApoE-/-Dgat1-/- mice are protected from developing atherosclerosis in association with reduced foam cell formation. However, the role of DGAT1, specifically in myeloid and other hematopoietic cell types, in determining this protective phenotype is unknown. To address this question, we reconstituted the bone marrow of irradiated Ldlr-/-mice with that from wild-type (WT→ Ldlr-/-) and Dgat1-/-(Dgat1-/-→ Ldlr-/-) donor mice...
2016: PloS One
https://www.readbyqxmd.com/read/27208257/an-improved-variant-of-soybean-type-1-diacylglycerol-acyltransferase-increases-the-oil-content-and-decreases-the-soluble-carbohydrate-content-of-soybeans
#19
Keith Roesler, Bo Shen, Ericka Bermudez, Changjiang Li, Joanne Hunt, Howard G Damude, Kevin G Ripp, John D Everard, John R Booth, Leandro Castaneda, Lizhi Feng, Knut Meyer
Kinetically improved diacylglycerol acyltransferase (DGAT) variants were created to favorably alter carbon partitioning in soybean (Glycine max) seeds. Initially, variants of a type 1 DGAT from a high-oil, high-oleic acid plant seed, Corylus americana, were screened for high oil content in Saccharomyces cerevisiae Nearly all DGAT variants examined from high-oil strains had increased affinity for oleoyl-CoA, with S0.5 values decreased as much as 4.7-fold compared with the wild-type value of 0.94 µm Improved soybean DGAT variants were then designed to include amino acid substitutions observed in promising C...
June 2016: Plant Physiology
https://www.readbyqxmd.com/read/27184406/biochemical-characterization-of-human-acyl-coenzyme-a-2-monoacylglycerol-acyltransferase-3-mgat3
#20
Curtis Brandt, Pamela J McFie, Scot J Stone
BACKGROUND: MGAT3 catalyzes the synthesis of 1,2-diacylglycerol from 2-monoacylglycerol in an acyl CoA-dependent reaction. Although initially identified as an MGAT enzyme, MGAT3 is more closely related to DGAT2 than to MGAT1 and MGAT2. Furthermore, MGAT3 possesses both DGAT and MGAT activities, in vitro. MGAT3 is almost exclusively expressed in the small intestine in humans, suggesting that it has a role in dietary fat absorption. Although identified many years ago, little information is available regarding the contribution of MGAT3 to triacylglycerol biosynthesis...
July 1, 2016: Biochemical and Biophysical Research Communications
keyword
keyword
53775
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"