Novel delta-12 desaturase and methods of using it for synthesis of polyunsaturated fatty acids
First Claim
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1. A purified desaturase protein, comprising an amino acid sequence selected from the group consisting of:
- (a) an amino acid sequence as shown in SEQ. ID NO. 2;
(b) an amino acid sequence that differs from that specified in (a) by one or more conservative amino acid substitutions;
(c) an amino acid sequences having at least 60% sequence identity to the sequences specified in (a) or (b); and
(d) fragments of (a), (b), or (c), wherein the purified protein has desaturase activity.
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Abstract
Desaturase enzymes, and especially animal Δ12-desaturases, and the use of such enzymes to alter fatty acid saturation, especially fatty acid saturation in oilseeds, are disclosed. Also disclosed are nucleic acid sequences encoding animal Δ12-desaturase enzymes.
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Citations
32 Claims
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1. A purified desaturase protein, comprising an amino acid sequence selected from the group consisting of:
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(a) an amino acid sequence as shown in SEQ. ID NO. 2;
(b) an amino acid sequence that differs from that specified in (a) by one or more conservative amino acid substitutions;
(c) an amino acid sequences having at least 60% sequence identity to the sequences specified in (a) or (b); and
(d) fragments of (a), (b), or (c), wherein the purified protein has desaturase activity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 29, 30, 31, 32)
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11. An isolated nucleic acid molecule that:
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(a) hybridizes under low-stringency conditions with a nucleic acid probe, the probe comprising a sequence as shown in SEQ ID NO;
1, and fragments thereof, and(b) encodes a protein having desaturase activity. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An isolated nucleic acid molecule that:
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(a) has at least 60% sequence identity with a nucleic acid sequence as shown in SEQ ID NO;
1; and
(b) encodes a protein having desaturase activity.
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22. A method for identifying a nucleic acid sequence, comprising:
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(a) hybridizing the nucleic acid sequence to at least 10 contiguous nucleotides of a sequence as shown in SEQ ID NO;
1; and
(b) identifying the nucleic acid sequence as corresponding to a nucleic acid encoding a desaturase. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification