Production of steviol glycosides in recombinant hosts
First Claim
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1. A method of producing one or more steviol glycosides or a steviol glycoside composition in a cell culture, comprising culturing a recombinant host cell comprising:
- (a) a recombinant gene encoding a polypeptide capable of synthesizing uridine 5′
-triphosphate (UTP) from uridine diphosphate (UDP);
wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in SEQ ID NO;
123;
(b) a recombinant gene encoding a polypeptide capable of converting glucose-6-phosphate to glucose-1-phosphate;
wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NOs;
2, 119, 141, 143, 145, or 147; and
/or(c) a recombinant gene encoding a polypeptide capable of synthesizing uridine diphosphate glucose (UDP-glucose) from UTP and glucose-1 phosphate;
wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NOs;
121, 125, 127, 129, 131, 133, 135, 137, or 139,in the cell culture, under conditions in which the recombinant genes are expressed, and wherein the one or more steviol glycosides or the steviol glycoside composition is produced by the recombinant host cell.
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Abstract
The invention relates to recombinant microorganisms and methods for producing steviol glycosides and steviol glycoside precursors.
102 Citations
22 Claims
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1. A method of producing one or more steviol glycosides or a steviol glycoside composition in a cell culture, comprising culturing a recombinant host cell comprising:
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(a) a recombinant gene encoding a polypeptide capable of synthesizing uridine 5′
-triphosphate (UTP) from uridine diphosphate (UDP);wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in SEQ ID NO;
123;(b) a recombinant gene encoding a polypeptide capable of converting glucose-6-phosphate to glucose-1-phosphate; wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NOs;
2, 119, 141, 143, 145, or 147; and
/or(c) a recombinant gene encoding a polypeptide capable of synthesizing uridine diphosphate glucose (UDP-glucose) from UTP and glucose-1 phosphate; wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NOs;
121, 125, 127, 129, 131, 133, 135, 137, or 139,in the cell culture, under conditions in which the recombinant genes are expressed, and wherein the one or more steviol glycosides or the steviol glycoside composition is produced by the recombinant host cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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13. A method for producing one or more steviol glycosides or a steviol glycoside composition, comprising whole-cell bioconversion of plant-derived or synthetic steviol and/or steviol glycosides in a cell culture medium of a recombinant host cell using:
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(a) a recombinant gene encoding a polypeptide capable of synthesizing uridine 5′
-triphosphate (UTP) from uridine diphosphate (UDP);wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in SEQ ID NO;
123;(b) a recombinant gene encoding a polypeptide capable of converting glucose-6-phosphate to glucose-1-phosphate; wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NOs;
2, 119, 141, 143, 145, or 147; and
/or(c) a recombinant gene encoding a polypeptide capable of synthesizing uridine diphosphate glucose (UDP-glucose) from UTP and glucose-1 phosphate; wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NOs;
121, 125, 127, 129, 131, 133, 135, 137, or 139, andone or more of; (d) a gene encoding a polypeptide capable of glycosylating steviol or a steviol glycoside at its C-13 hydroxyl group thereof; wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in SEQ ID NO;
7;(e) a gene encoding a polypeptide capable of beta 1,3 glycosylation of the C3′
of the 13-O-glucose, 19-O-glucose, or both 13-O-glucose and 19-O-glucose of a steviol glycoside;wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in SEQ ID NO;
9;(f) a gene encoding a polypeptide capable of glycosylating steviol or a steviol glycoside at its C-19 carboxyl group thereof; wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in SEQ ID NO;
4; and
/or(g) a gene encoding a polypeptide capable of beta 1,2 glycosylation of the C2′
of the 13-O-glucose, 19-O-glucose, or both 13-O-glucose and 19-O-glucose of a steviol glycoside;wherein the polypeptide comprises a polypeptide having at least 90% sequence identity to the amino acid sequence set forth in any one of SEQ ID NO;
11, 13, or 16;wherein at least one of the polypeptides is a recombinant polypeptide expressed in the recombinant host cell; and
producing the one or more steviol glycosides or the steviol glycoside composition thereby.
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Specification