Abstract: Transgenic soybean seed having increased total fatty acid content of at least 10% and altered fatty acid profiles when compared to the total fatty acid content of non-transgenic, null segregant soybean seed are described. DGAT genes from Yarrowia Lipolytica are used to achieve the increase in seed storage lipids.

Abstract: Recombinant microbial cells are disclosed herein that produce an oil comprising at least 28 percent eicosapentaenoic acid (EPA) measured as a weight percent of dry cell weight. These cells may comprise a polynucleotide sequence encoding an active acyl-CoA:lysophosphatidylcholine acyltransferase (LPCAT) comprising at least one amino acid mutation in a membrane-bound O-acyltransferase motif. In addition, the cells may comprise a down-regulation of an endogenous polynucleotide sequence encoding Sou2 sorbitol utilization protein, and/or one or more polynucleotides encoding phospholipid:diacylglycerol acyltransferase (PDAT), delta-12 desaturase, a dihomo-gamma-linolenic acid (DGLA) synthase multizyme, delta-8 desaturase, malonyl-CoA synthetase (MCS), or acyl-CoA:lysophosphatidic acid acyltransferase (LPAAT). Also disclosed are methods of using the recombinant microbial cells to produce oil containing omega-3 polyunsaturated fatty acids such as EPA.

Abstract: Methods of increasing the amount of polyunsaturated fatty acids (PUFAs) in the total lipid fraction and in the oil fraction of PUFA-producing, oleaginous eukaryotes, accomplished by modifying the activity of peroxisome biogenesis factor (Pex) proteins. Disruptions of a chromosomal Pex3 gene, Pex10p gene or Pex16p gene in a PUFA-producing, oleaginous eukaryotic strain resulted in an increased amount of PUFAs, as a percent of total fatty acids and as a percent of dry cell weight, in the total lipid fraction and in the oil fraction of the strain, as compared to the parental strain whose native Pex protein was not disrupted.

Abstract: Provided herein are recombinant yeast host cells and methods for their use for production of fermentation products from an engineered pyruvate utilizing pathway. The yeast host cells provided herein comprise an altered lipid profile, which confers resistance to butanol.

Abstract: Acyl-CoA:lysophosphatidylcholine acyltransferase [“LPCAT”] having the ability to convert acyl-CoA+1-acyl-sn-glycero-3-phosphocholine to CoA+1,2-diacyl-sn-glycero-3-phosphocholine (EC 2.3.1.23) is disclosed herein to be over-expressed along with the over-expression of phospholipid:diacylglycerol acyltransferase [“PDAT”] having the ability to transfer a fatty acyl group from the sn-2 position of a phospholipid (e.g., phosphatidylcholine) to the sn-3 position of 1,2-diacylglycerol [E.C.2.3.1.158], thus resulting in a lysophospholipid and TAG. Co-expression of these enzymes in a recombinant microbial host cell resulted in increased production of long chain polyunsaturated fatty acids [“PUFAs”].

Abstract: Compositions and methods are provided which employ a chemical-gene switch which may comprise at least three components. The first component comprises a polynucleotide encoding a chemically-regulated transcriptional repressor; the second component comprises a repressible promoter operably linked to a polynucleotide of interest, and the third component comprises a gene silencing construct operably linked to a second repressible promoter, wherein the gene silencing construct encodes a silencing element that decreases the level of mRNA encoding the chemically-regulated transcriptional repressor. Expression of the polynucleotide of interest and the silencing construct is controlled by providing the appropriate chemical ligand. Transient induction from the chemical ligand leads to the production of the silencing element, and the destruction of the mRNA encoding the chemically-regulated transcriptional repressor.

Abstract: Mutant acyl-CoA:lysophosphatidylcholine acyltransferases [“LPCATs”] having the ability to convert acyl-CoA+1-acyl-sn-glycero-3-phosphocholine to CoA+1,2-diacyl-sn-glycero-3-phosphocholine (EC 2.3.1.23) are disclosed herein. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding mutant LPCATs, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”] using these mutant LPCATs in oleaginous yeast, are also disclosed.

Abstract: The present invention relates to fungal ?-15 fatty acid desaturases that are able to catalyze the conversion of linoleic acid (18:2, LA) to alpha-linolenic acid (18:3, ALA). Nucleic acid sequences encoding the desaturases, nucleic acid sequences which hybridize thereto, DNA constructs comprising the desaturase genes, and recombinant host plants and microorganisms expressing increased levels of the desaturases are described. Methods of increasing production of specific omega-3 and omega-6 fatty acids by over-expression of the ?-15 fatty acid desaturases are also described herein.

Abstract: The present invention relates to methods for the production of ?-3 and/or ?-6 fatty acids in oleaginous yeast. Thus, desaturases and elongases able to catalyze the conversion of linoleic acid (LA) to ?-linolenic acid (GLA); ?-linoleic acid (ALA) to stearidonic acid (STA); GLA to dihomo-?-linoleic acid (DGLA); STA to eicosatetraenoic acid (ETA); DGLA to arachidonic acid (ARA); ETA to eicosapentaenoic acid (EPA); DGLA to ETA; EPA to docosapentaenoic acid (DPA); and ARA to EPA have been introduced into the genome of Yarrowia for synthesis of ARA and EPA.

Abstract: The present invention relates to fungal ?12 desaturases (responsible for conversion of oleic acid to linoleic acid (18:2, LA)) and ?15 fatty acid desaturases (responsible for conversion of LA to ?-linolenic acid (18:3, ALA)). Amino acid motifs diagnostic of ?12 desaturases and ?15 desaturases are also provided. Methods of altering enzyme specificity towards ?12 desaturation or towards ?15 desaturation and/or increasing production of specific ?-3 and ?-6 fatty acids by over-expression of the fungal desaturases are also described.

Abstract: Methods for increasing C18 to C20 elongation conversion efficiency and/or ?4 desaturation conversion efficiency in long-chain polyunsaturated fatty acid [“LC-PUFA”]-producing recombinant oleaginous microbial host cells are provided herein, based on over-expression of acyl-CoA:lysophospholipid acyltransferases [“LPLATs”] (e.g., Ale1, LPAAT, LPCAT). Production host cells and oils produced by the methods of the invention are also claimed.

Abstract: Transgenic soybean seed having increased total fatty acid content of at least 10% and altered fatty acid profiles when compared to the total fatty acid content of non-transgenic, null segregant soybean seed are described. DGAT genes from Yarrowia Lipolytica are used to achieve the increase in seed storage lipids.

Abstract: Methods of increasing the amount of polyunsaturated fatty acids (PUFAs) in the total lipid fraction and in the oil fraction of PUFA-producing, oleaginous eukaryotes, accomplished by modifying the activity of peroxisome biogenesis factor (Pex) proteins. Disruptions of a chromosomal Pex3 gene, Pex10p gene or Pex16p gene in a PUFA-producing, oleaginous eukaryotic strain resulted in an increased amount of PUFAs, as a percent of total fatty acids and as a percent of dry cell weight, in the total lipid fraction and in the oil fraction of the strain, as compared to the parental strain whose native Pex protein was not disrupted.

Abstract: Transgenic soybean seed having increased total fatty acid content of at least 10% and altered fatty acid profiles when compared to the total fatty acid content of non-transgenic, null segregant soybean seed are described. DGAT genes from Yarrowia Lipolytica are used to achieve the increase in seed storage lipids.

Abstract: Methods of increasing the amount of polyunsaturated fatty acids (PUFAs) in the total lipid fraction and in the oil fraction of PUFA-producing, oleaginous eukaryotes, accomplished by modifying the activity of peroxisome biogenesis factor (Pex) proteins, are disclosed. Disruptions of a chromosomal Pex3 gene, Pex10p gene or Pex16p gene in a PUFA-producing, oleaginous eukaryotic strain resulted in an increased amount of PUFAs, as a percent of total fatty acids and as a percent of dry cell weight, in the total lipid fraction and in the oil fraction of the strain, as compared to the parental strain whose native Pex protein was not disrupted.

Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ?-3 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of EPA. Production host cells are claimed, as are methods for producing EPA within said host cells.

Abstract: Recombinant microbial cells are disclosed herein that produce an oil comprising at least 28 percent eicosapentaenoic acid (EPA) measured as a weight percent of dry cell weight. These cells may comprise a polynucleotide sequence encoding an active acyl-CoA:lysophosphatidylcholine acyltransferase (LPCAT) comprising at least one amino acid mutation in a membrane-bound O-acyltransferase motif. In addition, the cells may comprise a down-regulation of an endogenous polynucleotide sequence encoding Sou2 sorbitol utilization protein, and/or one or more polynucleotides encoding phospholipid:diacylglycerol acyltransferase (PDAT), delta-12 desaturase, a dihomo-gamma-linolenic acid (DGLA) synthase multizyme, delta-8 desaturase, malonyl-CoA synthetase (MCS), or acyl-CoA:lysophosphatidic acid acyltransferase (LPAAT). Also disclosed are methods of using the recombinant microbial cells to produce oil containing omega-3 polyunsaturated fatty acids such as EPA.

Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 50 weight percent of eicosapentaenoic acid in the total oil fraction are described. These strains over-express heterologous ?9 elongases, ?8 desaturases, ?5 desaturases, ?17 desaturases, ?12 desaturases and C16/18 elongases, and optionally over-express diacylglycerol cholinephosphotransferases. Gene knockouts are also described, as are methods for producing EPA within host cells, and products comprising EPA from the optimized Yarrowia lipolytica strains.

Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica are disclosed herein that are capable of producing microbial oil comprising greater than 25 weight percent of eicosapentaenoic acid [“EPA”], an omega-3 polyunsaturated fatty acid, measured as a weight percent of dry cell weight.

Abstract: Acyltransferases are provided, suitable for use in the manufacture of microbial oils enriched in omega fatty acids in oleaginous yeast (e.g., Yarrowia lipolytica). Specifically, genes encoding diacylglycerol acyltransferase (DGAT1) have been isolated from Y. lipolytica and Mortierella alpina. These genes encode enzymes that participate in the terminal step in oil biosynthesis in yeast. Each is expected to play a key role in altering the quantity of polyunsaturated fatty acids produced in oils of oleaginous yeasts.