Abstract: Disclosed are microalgal cells having an ablated or downregulated fatty acyl-ACP thioesterase (FATA) gene, wherein the cell is modified to express a heterologous lysophosphatidic acid acyltransferase (LPAAT) comprising an amino acid sequence that has at least 80% identity to an acyltransferase encoded by SEQ ID NO: 90, 89, 92, 93 or 95 and wherein the modified microalgal cell produces an oil with an elevated ratio of saturated-unsaturated-saturated triglycerides over trisaturated triglycerides as compared to a corresponding unmodified cell. Also disclosed are microalgal oils comprising at least 60% stearate-oleate-stearate (SOS) triglycerides, less than 5% trisaturates and wherein the fatty acid profile of the oil comprises at least 50% C18:0. Related methods of producing an oil are also disclosed.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.

Abstract: The present invention relates to beta-ketoacyl ACP synthase genes of the KASI/KASIV type and proteins encoded by these genes. The genes can be included in nucleic acid constructs, vectors or host cells. Expression of the gene products can alter the fatty acid profile of host cells. The KAS genes can be combined with a FATA or FATB thioesterase gene to create a cell that produces an increased amount of C8-C16 fatty acids. Suitable host cells include plastidic cells of plants or microalgae. Oleaginous microalga host cells with the new genes are disclosed.

Abstract: Novel plant acyl-ACP thioesterase genes of the FatB and FatA classes and proteins encoded by these genes are disclosed. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Expression of the novel and/or mutated FATB and FATA genes is demonstrated in oleaginous microalga host cells. Furthermore, a method for producing an oil elevated in one or more of C12:0, C14:0, C16:0, C18:0 and/or C18:1 fatty acids includes transforming a cell with novel and/or mutated FATB and/or FATA genes, e.g., having an N-terminal deletion. The cells produce triglycerides with altered and useful fatty acid profiles.

Abstract: The present invention relates to beta-ketoacyl ACP synthase genes of the KASI/KASIV type and proteins encoded by these genes. The genes can be included in nucleic acid constructs, vectors or host cells. Expression of the gene products can alter the fatty acid profile of host cells. The KAS genes can be combined with a FATA or FATB thioesterase gene to create a cell that produces an increased amount of C8-C16 fatty acids. Suitable host cells include plastidic cells of plants or microalgae. Oleaginous microalga host cells with the new genes are disclosed.

Abstract: Novel plant acyl-ACP thioesterase genes of the FatB and FatA classes and proteins encoded by these genes are disclosed. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Expression of the novel and/or mutated FATB and FATA genes is demonstrated in oleaginous microalga host cells. Furthermore, a method for producing an oil elevated in one or more of C12:0, C14:0, C16:0, C18:0 and/or C18:1 fatty acids includes transforming a cell with novel and/or mutated FATB and/or FATA genes, e.g., having an N-terminal deletion. The cells produce triglycerides with altered and useful fatty acid profiles.

Abstract: The present invention relates to beta-ketoacyl ACP synthase genes of the KASI/KASIV type and proteins encoded by these genes. The genes can be included in nucleic acid constructs, vectors or host cells. Expression of the gene products can alter the fatty acid profile of host cells. The KAS genes can be combined with a FATA or FATB thioesterase gene to create a cell that produces an increased amount of C8-C16 fatty acids. Suitable host cells include plastidic cells of plants or microalgae. Oleaginous microalga host cells with the new genes are disclosed.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.

Abstract: Recombinant nucleic acids and vector constructs encoding acyltransferases and variant thioesterases, and the acyltransferases and variant thioesterases encoded by the nucleic acids are provided. The acyltransferases and variant thioesterases are useful in fatty acid synthesis and triacylglycerol production. Host cells that express the recombinant nucleic acids as well as methods of cultivating the host cells, methods of producing oils from the host cells are provided. The recombinant host cells and the oils produced therefrom have altered fatty acid profiles and/or triacylglycerols with altered regiospecificity.

Abstract: The present invention relates to beta-ketoacyl ACP synthase genes of the KASI/KASIV type and proteins encoded by these genes. The genes can be included in nucleic acid constructs, vectors or host cells. Expression of the gene products can alter the fatty acid profile of host cells. The KAS genes can be combined with a FATA or FATB thioesterase gene to create a cell that produces an increased amount of C8-C16 fatty acids. Suitable host cells include plastidic cells of plants or microalgae. Oleaginous microalga host cells with the new genes are disclosed.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.

Abstract: Novel plant acyl-ACP thioesterase genes of the FatB and FatA classes and proteins encoded by these genes are disclosed. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Expression of the novel and/or mutated FATB and FATA genes is demonstrated in oleaginous microalga host cells. Furthermore, a method for producing an oil elevated in one or more of C12:0, C14:0, C16:0, C18:0 and/or C18:1 fatty acids includes transforming a cell with novel and/or mutated FATB and/or FATA genes, e.g., having an N-terminal deletion. The cells produce triglycerides with altered and useful fatty acid profiles.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.

Abstract: The present invention relates to beta-ketoacyl ACP synthase genes of the KASI/KASIV type and proteins encoded by these genes. The genes can be included in nucleic acid constructs, vectors or host cells. Expression of the gene products can alter the fatty acid profile of host cells. The KAS genes can be combined with a FATA or FATB thioesterase gene to create a cell that produces an increased amount of C8-C16 fatty acids. Suitable host cells include plastidic cells of plants or microalgae. Oleaginous microalga host cells with the new genes are disclosed.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.

Abstract: The invention features plant acyl-ACP thioesterase genes of the FatB class and proteins encoded by these genes. The genes are useful for constructing recombinant host cells having altered fatty acid profiles. Oleaginous microalga host cells with the new genes or previously identified FatB genes are disclosed. The microalgae cells produce triglycerides with useful fatty acid profiles.