Method of producing polyunsaturated fatty acids, novel biosynthesis genes, and novel plant expression constructs
First Claim
1. A method for the production of fatty acid esters with an increased content of polyunsaturated fatty acids with at least two double bonds, which comprises introducing, into a fatty-acid-ester-producing organism, at least one nucleic acid sequence selected from the group consisting ofa) a nucleic acid sequence with the sequence shown in SEQ ID NO:
- 1,b) a nucleic acid sequence encoding the amino acid sequence shown in SEQ ID NO;
2,c) a derivative of the nucleic acid sequence shown in SEQ ID NO;
1, which encodes a polypeptide having at least 90% homology with the amino acid sequence shown in SEQ ID NO;
2, and having Δ
5-desaturase activity,growing the organism, and isolating the fatty acid esters present in the organism, wherein the organism is a microorganism, a yeast, or a plant or plant cell.
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Abstract
The present invention relates to a method for the production of unsaturated fatty acids with at least two double bonds. The invention further relates to the use of the nucleic acid sequence of SEQ ID NO: 1 encoding a polypeptide having delta-5 desaturase activity in the method and for generating a transgenic organism, preferably a transgenic plant or microorganism with an increased content of fatty acids, oil or lipids with unsaturated long chain fatty acids, to their homologs or derivatives, and to gene constructs encompassing these genes. The invention also relates to the use of the nucleic acid sequences alone or in combination with further desaturases and/or elongase genes in the method and for generating transgenic organisms.
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13 Claims
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1. A method for the production of fatty acid esters with an increased content of polyunsaturated fatty acids with at least two double bonds, which comprises introducing, into a fatty-acid-ester-producing organism, at least one nucleic acid sequence selected from the group consisting of
a) a nucleic acid sequence with the sequence shown in SEQ ID NO: - 1,
b) a nucleic acid sequence encoding the amino acid sequence shown in SEQ ID NO;
2,c) a derivative of the nucleic acid sequence shown in SEQ ID NO;
1, which encodes a polypeptide having at least 90% homology with the amino acid sequence shown in SEQ ID NO;
2, and having Δ
5-desaturase activity,growing the organism, and isolating the fatty acid esters present in the organism, wherein the organism is a microorganism, a yeast, or a plant or plant cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 1,
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9. An isolated nucleic acid sequence encoding a polypeptide with desaturase activity, selected from the group consisting of:
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a) a nucleic acid sequence with the sequence shown in SEQ ID NO;
1,b) a nucleic acid sequence encoding the amino acid sequence shown in SEQ ID NO;
2,c) a derivative of the nucleic acid sequence shown in SEQ ID NO;
1, which encodes a polypeptide having at least 90% homology with the amino acid sequence shown in SEQ ID NO;
2, and having Δ
5-desaturase activity. - View Dependent Claims (10, 11, 13)
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12. An isolated nucleic acid sequence encoding a polypeptide comprising a sequence having at least 90% homology with the amino acid sequence shown in SEQ ID NO:
- 2.
Specification