摘要:
Promoter regions associated with the Yarrowia lipolytica diacylglycerol acyltransferase 2 (dgat2) gene are disclosed and have been found to be particularly effective for the expression of heterologous genes in yeast. These promoter regions will be useful for driving high-level expression of genes involved in the production of omega-3 and omega-6 fatty acids.
摘要:
The present invention relates to Δ17 desaturases, which have the ability to convert ω-6 fatty acids into their ω-3 counterparts (i.e., conversion of arachidonic acid [20:4, ARA] to eicosapentaenoic acid [20:5, EPA]). Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding Δ17 desaturases along with a method of making long-chain polyunsaturated fatty acids (PUFAs) using these Δ17 desaturases in oleaginous yeast are disclosed.
摘要:
The present invention relates to Δ9 elongases, which have the ability to convert linoleic acid [18:2, LA] to eicosadienoic acid [20:2, EDA]. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding Δ9 elongase along with methods of making long-chain polyunsaturated fatty acids (PUFAs) using these Δ9 elongases in plants and oleaginous yeast are disclosed.
摘要:
Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ω-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.
摘要:
Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding delta-8 desaturases along with a method of making long-chain polyunsaturated fatty acids (PUFAs) using these delta-8 desaturases in plants and oleaginous yeast.
摘要:
The promoter region associated with the Yarrowia lipolytica ammonium transporter (yat1) gene has been found to be particularly effective for the expression of heterologous genes in oleaginous yeast. The promoter regions of the instant invention have been shown to be advantageously inducible under oleaginous conditions (i.e., nitrogen limitation) and are useful to drive expression of genes involved in the production of ω-3 and ω-6 fatty acids.
摘要:
Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding a delta-8 desaturase along with a method of making long-chain polyunsaturated fatty acids (PUFAs) using this delta-8 desaturase in plants and oleaginous yeast are disclosed.
摘要:
The present invention relates to methods for the production of ω-3 and/or ω-6 fatty acids in oleaginous yeast. Thus, desaturases and elongases able to catalyze the conversion of linoleic acid (LA) to γ-linolenic acid (GLA); α-linoleic acid (ALA) to stearidonic acid (STA); GLA to dihomo-γ-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.
摘要:
An engineered strain of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 5.6% docosahexaenoic acid acid (DHA, an w-3 polyunsaturated fatty acid) in the total oil fraction is described. This strain comprises various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprises various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of DHA. Production host cells are claimed, as are methods for producing DHA within said host cells.
摘要:
Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding delta-5 desaturase along with a method of making long chain polyunsaturated fatty acids (PUFAs) using this delta-5 desaturase in plants and oleaginous yeast are disclosed.