Production of fatty acids esters
First Claim
1. A microbial cell for producing at least one fatty acid ester, wherein the cell comprises:
- (i) a first genetic mutation that enables the cell to produce at least one fatty acyl coenzyme A (CoA) intermediate by an increase in the expression of at least one enzyme selected from the group consisting of acetoacetyl-CoA synthase, ketoacyl-CoA synthase (or elongase), ketoacyl-CoA thiolase, enoyl-CoA reductase, ketoacyl-CoA reductase and 3-hydroxyacyl-CoA dehydratase relative to a wild type cell; and
(ii) a second genetic mutation that increases the activity of at least one wax ester synthase in the cell relative to the wild type cell, wherein the wax ester synthase has sequence identity of at least 80% to a polypeptide set forth in SEQ ID NO;
1, at least 80% to a polypeptide set forth in SEQ ID NO;
2, at least 85% to a polypeptide as set forth in SEQ ID NO;
3, at least 85% to a polypeptide as set forth in SEQ ID NO;
4, at least 90% to a polypeptide as set forth in SEQ ID NO;
5, at least 95% to a polypeptide as set forth in SEQ ID NO;
7, or at least 98% to a polypeptide as set forth in SEQ ID NO;
8, and combinations thereof or to a functional fragment of any of the polypeptides for catalyzing the conversion of the fatty acyl coenzyme A intermediate to a fatty acid ester.
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Abstract
A microbial cell is used for producing at least one fatty acid ester, wherein the cell is genetically modified to contain (i) at least one first genetic mutation that enables the cell to produce at least one fatty acid and/or acyl coenzyme A (CoA) thereof by increased enzymatic activity in the cell relative to the wild type cell of malonyl-CoA dependent and malonyl-ACP independent fatty acyl-CoA metabolic pathway, wherein the fatty acid contains at least 5 carbon atoms; and (ii) a second genetic mutation that increases the activity of at least one wax ester synthase in the cell relative to the wild type cell and the wax ester synthase has sequence identity of at least 50% to a polypeptide of SEQ ID NO: 1-8 and combinations thereof or to a functional fragment of any of the polypeptides for catalyzing the conversion of fatty acid and/or acyl coenzyme A thereof to the fatty acid ester.
253 Citations
18 Claims
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1. A microbial cell for producing at least one fatty acid ester, wherein the cell comprises:
- (i) a first genetic mutation that enables the cell to produce at least one fatty acyl coenzyme A (CoA) intermediate by an increase in the expression of at least one enzyme selected from the group consisting of acetoacetyl-CoA synthase, ketoacyl-CoA synthase (or elongase), ketoacyl-CoA thiolase, enoyl-CoA reductase, ketoacyl-CoA reductase and 3-hydroxyacyl-CoA dehydratase relative to a wild type cell; and
(ii) a second genetic mutation that increases the activity of at least one wax ester synthase in the cell relative to the wild type cell, wherein the wax ester synthase has sequence identity of at least 80% to a polypeptide set forth in SEQ ID NO;
1, at least 80% to a polypeptide set forth in SEQ ID NO;
2, at least 85% to a polypeptide as set forth in SEQ ID NO;
3, at least 85% to a polypeptide as set forth in SEQ ID NO;
4, at least 90% to a polypeptide as set forth in SEQ ID NO;
5, at least 95% to a polypeptide as set forth in SEQ ID NO;
7, or at least 98% to a polypeptide as set forth in SEQ ID NO;
8, and combinations thereof or to a functional fragment of any of the polypeptides for catalyzing the conversion of the fatty acyl coenzyme A intermediate to a fatty acid ester. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- (i) a first genetic mutation that enables the cell to produce at least one fatty acyl coenzyme A (CoA) intermediate by an increase in the expression of at least one enzyme selected from the group consisting of acetoacetyl-CoA synthase, ketoacyl-CoA synthase (or elongase), ketoacyl-CoA thiolase, enoyl-CoA reductase, ketoacyl-CoA reductase and 3-hydroxyacyl-CoA dehydratase relative to a wild type cell; and
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15. A method for producing fatty acid ester, the method comprising:
- contacting at least one fatty acyl coenzyme A (CoA) intermediate with an isolated wax ester synthase that has sequence identity of at least 80% to a polypeptide set forth in SEQ ID NO;
1, at least 85% to a polypeptide as set forth in SEQ ID NO;
3, at least 85% to a polypeptide as set forth in SEQ ID NO;
4, at least 90% to a polypeptide as set forth in SEQ ID NO;
5, at least 95% to a polypeptide as set forth in SEQ ID NO;
7, or at least 98% to a polypeptide as set forth in SEQ ID NO;
8.
- contacting at least one fatty acyl coenzyme A (CoA) intermediate with an isolated wax ester synthase that has sequence identity of at least 80% to a polypeptide set forth in SEQ ID NO;
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16. A method for producing at least one fatty acid ester, the method comprising culturing a microbial cell which comprises:
- (i) a first genetic mutation that enables the cell to produce at least one fatty acyl coenzyme A (CoA) intermediate by an increase in the expression of at least one enzyme selected from the group consisting of acetoacetyl-CoA synthase, ketoacyl-CoA synthase (or elongase), ketoacyl-CoA thiolase, enoyl-CoA reductase, ketoacyl-CoA reductase and 3-hydroxyacyl-CoA dehydratase relative to a wild type cell; and
(ii) a second genetic mutation that increases the activity of at least one wax ester synthase in the cell relative to the wild type cell, wherein the wax ester synthase has sequence identity of at least 80% to a polypeptide set forth in SEQ ID NO;
1, at least 80% to a polypeptide set forth in SEQ ID NO;
2, at least 85% to a polypeptide as set forth in SEQ ID NO;
3, at least 85% to a polypeptide as set forth in SEQ ID NO;
4, at least 90% to a polypeptide as set forth in SEQ ID NO;
5, at least 95% to a polypeptide as set forth in SEQ ID NO;
7, or at least 98% to a polypeptide as set forth in SEQ ID NO;
8, and combinations thereof or to a functional fragment of any of the polypeptides for catalyzing the conversion of the fatty acyl coenzyme A intermediate to a fatty acid ester. - View Dependent Claims (17, 18)
- (i) a first genetic mutation that enables the cell to produce at least one fatty acyl coenzyme A (CoA) intermediate by an increase in the expression of at least one enzyme selected from the group consisting of acetoacetyl-CoA synthase, ketoacyl-CoA synthase (or elongase), ketoacyl-CoA thiolase, enoyl-CoA reductase, ketoacyl-CoA reductase and 3-hydroxyacyl-CoA dehydratase relative to a wild type cell; and
Specification