PRODUCTION OF DICARBOXYLIC ACIDS BY IMPROVED MUTANT STRAINS OF YARROWIA LIPOLYTICA
First Claim
Patent Images
1. A method of producing dicarboxylic acids, comprising:
- (a) a growth stage wherein a mutant strain of Yarrowia lipolytica disrupted at least for the POX2, POX3, POX4 and POX5 genes (coding for acyl-CoA oxidase) is cultured in a culture medium essentially consisting of an energetic substrate comprising at least a source of carbon and a source of nitrogen,(b) a bioconversion stage wherein said strain is subjected to a bioconversion substrate selected from among the n-alkanes having at least 10 carbon atoms, fatty acids having at least 10 carbon atoms, alkyl esters having 1 to 4 carbon atoms of these fatty acids and natural oils, in the presence of an energetic substrate, and(c) a stage of recovering the dicarboxylic acid formed.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns a method for producing dicarboxylic acids (DCA) with long hydrocarbon chains, also called diacids, which consists in culturing a mutant strain of Yarrowia lipolytica obtained by mutagenesis directed and more particularly disrupted at least for the POX2, POX3, POX4 and POX5 genes encoding acyl-CoA oxydase, in a medium consisting essentially of an energetic substrate including at least one carbon source and one nitrogen source and in subjecting said strain to a bioconversion substrate selected among n-alkanes of at least 10 carbon atoms, fatty acids of at least 10 carbon atoms, their alkyl esters and natural oils.
17 Citations
24 Claims
-
1. A method of producing dicarboxylic acids, comprising:
-
(a) a growth stage wherein a mutant strain of Yarrowia lipolytica disrupted at least for the POX2, POX3, POX4 and POX5 genes (coding for acyl-CoA oxidase) is cultured in a culture medium essentially consisting of an energetic substrate comprising at least a source of carbon and a source of nitrogen, (b) a bioconversion stage wherein said strain is subjected to a bioconversion substrate selected from among the n-alkanes having at least 10 carbon atoms, fatty acids having at least 10 carbon atoms, alkyl esters having 1 to 4 carbon atoms of these fatty acids and natural oils, in the presence of an energetic substrate, and (c) a stage of recovering the dicarboxylic acid formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of obtaining a mutant Yarrowia lipolytica auxotrophic strain MTLY66, Leu−
- Ura−
, from the prototrophic mutant MTLY37, usable for transformation with, as the selection markers, the LEU2 and URA3 genes, characterized in that the conversion operations of stages 1 to 3 of the table hereafter are carried out;Conversion operations Stage Mutant to be converted Conversion with Converted mutant 1 MTLY37, Leu+, Ura+, Fragment of PCR ura3- MTLY40, Leu+, Ura−
, Δ
5-Δ
5-PT, Δ
2-PT, Δ
3-PT,41, 5FOA selection PT, Δ
2-PT, Δ
3-PT,Δ
4-PUTΔ
4-Pura3-41T2 MTLY40, Leu+, Ura−
, Δ
5-PHTleu2 cassette, MTLY64, Leu−
, Ura−
,PT, Δ
2-PT, Δ
3-PT,hygromycin selection Hyg+, Δ
5-PT, Δ
2-PT, Δ
3-Δ
4-Pura3-41TPT, Δ
4-Pura3-41T,Leu2;
;
Hyg3 MTLY64, Leu−
, Ura−
,pRRQ2 vector, Leu+ MTLY66, Leu−
, Ura−
, Δ
5-Hyg+, Δ
5-PT, Δ
2-PT, Δ
3-selection, checking Hyg−
,PT, Δ
2-PT, Δ
3-PT,PT, Δ
4-Pura3-41T,loss of plasmid pRRQ2 Δ
4-Pura3-41T, Δ
leu2Leu2;
;
Hygon YPD, isolation of Leu−
- Ura−
-
15. A method of obtaining, from mutant MTLY66, a mutant Yarrowia lipolytica strain MTLY74 Leu+ Ura−
- that overexpresses the CPR gene coding for NADPH-cytochrome reductase under the bioconversion conditions, by conversion of the JMP21-CPR vector containing selection marker LEU2 and the expression cassette with the CPR gene under the control of promoter pPOX2 inducible by the fatty acids, fatty acid esters or natural oils.
-
16. A method of obtaining, from mutant Yarrowia lipolytica strain MTLY74, a mutant Yarrowia lipolytica strain MTLY79 that overexpresses the genes coding for NADPH-cytochrome reductase and for cytochrome P450 monooxygenase under the bioconversion conditions, by conversion of the JMP21-ALK1 vector containing selection marker URA3 and the expression cassette with the ALK1 gene under the control of promoter pPOX2 inducible by the fatty acids, fatty acid esters or natural oils.
-
17. A method of obtaining, from mutant Yarrowia lipolytica strain MTLY74, a mutant Yarrowia lipolytica strain MTLY80 that overexpresses the genes coding for NADPH-cytochrome reductase and for cytochrome P450 monooxygenase ALK2 under the bioconversion conditions, by conversion of the JMP61-ALK2 vector containing selection marker URA3 and the expression cassette with the ALK2 gene under the control of promoter pPOX2 inducible by the fatty acids, fatty acid esters or natural oils.
-
18. A method of obtaining a mutant Yarrowia lipolytica strain MTLY81 from mutant strain MTLY74, that overexpresses the CPR gene coding for NADPH-cytochrome reductase under the bioconversion conditions, by expressing it under the control of promoter pPOX2 induced by the bioconversion substrates, of fatty acid, fatty acid ester or natural oil type and that is prototrophic, by making mutant MTLY 74 prototrophic by transformation with the JMP61 plasmid carrying marker URA3.
-
19. A method of obtaining, from mutant Yarrowia lipolytica strain MTLY66, a mutant Yarrowia lipolytica strain FT120 Leu−
- Ura−
, characterized in that the conversion operations of stages 1 to 4 of the table hereafter are carried out;Conversion operations Stage Mutant to be converted Conversion cassette Converted mutant 1 MTLY66, Leu−
, Ura−
,POX1-PHT MTLY82, Leu−
, Ura−
,Hyg−
, Δ
5-PT, Δ
2-PT, Δ
3-Hyg+, Δ
5-PT, Δ
2-PT, Δ
3-PT, Δ
4-Pura3-41TPT, Δ
4-Pura3-41T, Δ
1-PHT 2 MTLY82, Leu−
, Ura−
,pRRQ2 vector, Leu+ MTLY85 Leu−
, Ura−
, Hyg−
,Hyg+, Δ
5-PT, Δ
2-PT, Δ
3-selection, checking Hyg−
,Δ
5-PT, Δ
2-PT, Δ
3-PT,PT, Δ
4-Pura3-41T, Δ
1-loss of plasmid pRRQ2 Δ
4-Pura3-41T, Δ
1-PTPHT on YPD, isolation of Leu− 3 MTLY85 Leu−
, Ura−
, Hyg−
,POX6-PHT MTLY92 Leu−
, Ura−
,Δ
5-PT, Δ
2-PT, Δ
3-PT,Hyg+, Δ
5-PT, Δ
2-PT, Δ
3-Δ
4-Pura3-41T, Δ
1-PTPT, Δ
4-Pura3-41T, Δ
1-PT, Δ
6-PHT4 MTLY92 Leu−
, Ura−
,pRRQ2 vector, Leu+ MTLY95 Leu−
, Ura−
, Hyg−
,Hyg+, Δ
5-PT, Δ
2-PT, Δ
3-selection, checking Hyg−
,Δ
5-PT, Δ
2-PT, Δ
3-PT,PT, Δ
4-Pura3-41T, Δ
1-loss of plasmid pRRQ2 Δ
4-Pura3-41T, Δ
1-PT,PT, Δ
6-PHTon YPD, isolation of Leu− Δ
6-PT5 MTLY95 Leu−
, Ura−
, Hyg−
,Expression cassette FT101, Leu+, Ura−
, Hyg−
,Δ
5-PT, Δ
2-PT, Δ
3-PT,pPOX2-CPR of JM21- Δ
5-PT, Δ
2-PT, Δ
3-PT,Δ
4-Pura3-41T, Δ
1-PT,LEU2ex-CPR Δ
4-Pura3-41T, Δ
1-PT,Δ
6-PTΔ
6-PT, CPR-LEU2ex6 FT101, Leu+, Ura−
, Hyg−
,pUB4-CRE vector, Hyg+ FT120, Leu−
, Ura−
, Hyg−
,Δ
5-PT, Δ
2-PT, Δ
3-PT,selection, checking Leu−
,Δ
5-PT, Δ
2-PT, Δ
3-PT,Δ
4-Pura3-41T, Δ
1-PT,loss of plasmid pUB4- Δ
4-Pura3-41T, Δ
1-PT,Δ
6-PT, CPR-LEU2exCRE on YPD, isolation of Δ
6-PT, CPRHyg− and in that construction of the mutant strain FT101 Leu+ Ura−
is performed from Yarrowia lipolytica strain MTLY95, that overexpresses the gene coding (CPR) for NADPH-cytochrome reductase under the bioconversion conditions, by conversion of the JMP21-LEU2ex-CPR vector containing the excisable selection marker LEU2 and the CPR gene under the control of promoter pPOX2 inducible by the fatty acids, fatty acid esters or natural oils, strain FT120 being obtained after excision of marker LEU2ex by conversion with the pUB4-CRE plasmid, Hyg+ selection, loss of plasmid on YPD and finally isolation of a clone Leu−
.
- Ura−
-
20. A method of obtaining from mutant Yarrowia lipolytica strain FT120, a mutant Yarrowia lipolytica strain FT130, characterized in that the following conversion stage is carried out:
Conversion operations Conversion Stage Mutant to be converted cassette Converted mutant 1 FT120, Leu−
, Ura−
,DGA1-PUT FT130, Leu−
, Ura+, Hyg−
,Hyg−
, Δ
5-PT, Δ
2-PT,Δ
5-PT, Δ
2-PT, Δ
3-PT,Δ
3-PT, Δ
4-Pura3-41T,Δ
4-Pura3-41T, Δ
1-PT,Δ
1-PT, Δ
6-PT, CPRΔ
6-PT, CPR, Δ
dga1-PUT
-
21. A new mutant Yarrowia lipolytica strain MTLY66.
-
22. A new mutant Yarrowia lipolytica strain MTLY81.
-
23. A new mutant Yarrowia lipolytica strain FT120.
-
24. A new mutant Yarrowia lipolytica strain FT130.
Specification