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broad/triacylglycerol
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Rapid triacylglycerol turnover in Chlamydomonas reinhardtii requires a lipase with broad substrate specificity.
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When deprived of nitrogen (N), the photosynthetic microalga Chlamydomonas reinhardtii accumulates large quantities of triacylglycerols (TAGs), making it a promising source of biofuel. Prominent transcriptional changes associated with the conditions leading to TAG accumulation have been found,
Expression of Soluble Forms of Yeast Diacylglycerol Acyltransferase 2 That Integrate a Broad Range of Saturated Fatty Acids in Triacylglycerols.
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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
Substrate specificity of phospholipase B from guinea pig intestine. A glycerol ester lipase with broad specificity.
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The substrate specificity of a calcium-independent, 97-kDa phospholipase B purified from guinea pig intestine was further investigated using various natural and synthetic lipids. The enzyme was equally active toward enantiomeric phosphatidylcholines under conditions allowing a strict phospholipase A
Expanding of Phospholipid:Diacylglycerol AcylTransferase (PDAT) from Saccharomyces cerevisiae as Multifunctional Biocatalyst with Broad Acyl Donor/Acceptor Selectivity.
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Triacylglycerols are considered one of the most promising feedstocks for biofuels. Phospholipid:diacylglycerol acyltransferase (PDAT), responsible for the last step of triacylglycerol synthesis in the acyl-CoA-independent pathway, has attracted much attention by catalyzing membrane lipid
A thraustochytrid diacylglycerol acyltransferase 2 with broad substrate specificity strongly increases oleic acid content in engineered Arabidopsis thaliana seeds.
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Diacylglycerol acyltransferase (DGAT) catalyses the last step in acyl-CoA-dependent triacylglycerol (TAG) biosynthesis and is an important determinant of cellular oil content and quality. In this study, a gene, designated TaDGAT2, encoding a type 2 DGAT (DGAT2)-related enzyme was identified from the
Platelet-activating factor acetylhydrolases: broad substrate specificity and lipoprotein binding does not modulate the catalytic properties of the plasma enzyme.
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Platelet-activating factor acetylhydrolases (PAF-AHs) are a group of enzymes that hydrolyze the sn-2 acetyl ester of PAF (phospholipase A(2) activity) but not phospholipids with two long fatty acyl groups. Our previous studies showed that membrane-bound human plasma PAF-AH (pPAF-AH) accesses its
5-Ethyl-2-mercaptothiazole as matrix for matrix-assisted laser desorption/ionization of a broad spectrum of analytes in positive and negative ion mode.
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A preliminary investigation of the use of 5-ethyl-2-mercaptothiazole as matrix in matrix-assisted laser desorption/ionization (MALDI) of a broad spectrum of analytes is reported. The analytes studied are substance P, insulin, beta-cyclodextrin, triacylglycerols of coconut oil and polypropylene
Conversion of a Mono- and Diacylglycerol Lipase into a Triacylglycerol Lipase by Protein Engineering.
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Despite the fact that most lipases are believed to be active against triacylglycerides, there is a small group of lipases that are active only on mono- and diacylglycerides. The reason for this difference in substrate scope is not clear. We tried to identify the reasons for this in the lipase from
Variation among extracted lines of Drosophila melanogaster in triacylglycerol and carbohydrate storage.
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Whole larvae and whole adult extracts from 26 second chromosome replacement lines of Drosophila melanogaster were analyzed to determine the amounts of stored triacylglycerols and carbohydrates as well as the activities of 13 enzymes in relevant biochemical pathways. Analysis of covariance revealed
The action of phosphatidate phosphatase on the fatty-acid composition of safflower triacylglycerol and spinach glycerolipids.
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The microsomal phosphatidate phosphatase (EC 3.1.3.4) in maturing seeds of safflower (Carthamus tinctorius L.) was specific and selective for unsaturated phosphatidates. The relative order of specificity for phosphatidate molecular species was 1,2-dilinoleoyl = 1,2-dioleoyl > 1-palmitoyl-2-oleoyl >
Acid triacylglycerol lipase from bovine thyroid gland.
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An acid lipase has been detected in bovine thyroid tissue using triolein as a substrate. The activity, probably associated with the lysosomes, displays a rather broad pH-optimum in the pH 4 to pH 6.5 range. The lipase activity can be partially purified by cosedimentation with lysosomes followed by
Phospholipid:diacylglycerol acyltransferase is a multifunctional enzyme involved in membrane lipid turnover and degradation while synthesizing triacylglycerol in the unicellular green microalga Chlamydomonas reinhardtii.
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Many unicellular microalgae produce large amounts (∼20 to 50% of cell dry weight) of triacylglycerols (TAGs) under stress (e.g., nutrient starvation and high light), but the synthesis and physiological role of TAG are poorly understood. We present detailed genetic, biochemical, functional, and
Increase in lysophosphatidate acyltransferase activity in oilseed rape (Brassica napus) increases seed triacylglycerol content despite its low intrinsic flux control coefficient.
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Lysophosphatidate acyltransferase (LPAAT) catalyses the second step of the Kennedy pathway for triacylglycerol (TAG) synthesis. In this study we expressed Trapaeolum majus LPAAT in Brassica napus (B. napus) cv 12075 to evaluate the effects on lipid synthesis and estimate the flux control coefficient
Triacylglycerol biosynthesis in human small intestinal mucosa. Acyl-CoA: monoglyceride acyltransferase.
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Acyl-CoA: monoglyceride acyltransferase (MGAT; EC 2.3.1.22) has been studied in human small intestinal mucosa by means of a spectrophotometric method based on the detection of liberated CoA employing 5,5'-dithiobis-(2-nitrobenzoic acid). With optimal assay conditions available the pH optimum was
Purification and properties of a triacylglycerol lipase from Mycobacterium phlei.
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In order to study the metabolism of triacylglycerol in mycobacteria, an intracellular particulate triacylglycerol lipase (EC 3.1.1.3) was purified 800-fold from stationary phase cells of Mycobacterium phlei. Extraction of whole cell suspensions with 5% Triton X-100, followed by ion-exchange
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