Expression cassettes for transgenic expression of nucleic acids
The invention relates to expression cassettes and vectors which contain constitutive promoters of plants and to the use of these expression cassettes or vectors for transgenic expression of nucleic acid sequences, preferably selection markers, in organisms, preferably in plants. The invention further relates to transgenic plants which have been transformed with the expression cassettes or vectors, to cultures, parts or propagation material derived from these plants, and to the use of these plants for the production of food and animal feedstuffs, seed, pharmaceuticals, or fine chemicals.
1. An expression cassette for transgenic expression of nucleic acids, comprising:
i) a promoter; and
ii) a nucleic acid sequence to be expressed transgenically which is operably linked to and heterologous in relation to said promoter;
wherein the promoter comprises the sequence of SEQ ID NO: 1, or a fragment thereof, or a sequence having at least 99% identity to the sequence of SEQ ID NO: 1 or 4,
wherein said promoter or fragment thereof has constitutive promoter activity.
2. The expression cassette of claim 1 , wherein the fragment comprises the sequence of SEQ ID NO: 4.
3. The expression cassette of claim 1 , wherein: the nucleic acid sequence to be expressed is further operably linked to one or more genetic control sequences, or the expression cassette comprises one or more additional functional elements.
4. The expression cassette of claim 1 , wherein the nucleic acid sequence to be expressed transgenically enables: expression of a protein encoded by said nucleic acid sequence, or expression of a sense RNA, antisense RNA, or ribozyme encoded by said nucleic acid sequence.
5. The expression cassette of claim 1 , wherein the nucleic acid sequence to be expressed transgenically is selected from the group consisting of nucleic acids coding for selection markers, reporter genes, cellulases, chitinases, glucanases, ribosome-inactivating proteins, lysozymes, Bacillus thuringiensis endotoxin, α-amylase inhibitor, protease inhibitors, lectins, RNAases, ribozymes, acetyl-CoA carboxylases, phytases, 2S albumin from Bertholletia excelsa , antifreeze proteins, trehalose phosphate synthase, trehalose phosphate phosphatase, trehalase, DREB 1A factor, farnesyl transferases, ferritin, oxalate oxidase, calcium-dependent protein kinases, calcineurins, glutamate dehydrogenases, N-hydroxylating multifunctional cytochrome P450, transcriptional activator CBF1, phytoene desaturases, polygalacturonases, flavonoid 3′-hydroxylases, dihydroflavanol 4-reductases, chalcone isomerases, chalcone synthases, flavanone 3-beta-hydroxylases, flavone synthase II, branching enzyme Q, starch branching enzyme, and combinations thereof.
6. The expression cassette of claim 1 , wherein the nucleic acid sequence to be expressed transgenically comprises a nucleic acid sequence selected from the group consisting of the nucleic acid sequence of SEQ ID NO: 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, and 64; or a nucleic acid sequence encoding a polypeptide comprising an amino acid sequence selected from the group consisting of the amino acid sequence of SEQ ID NO: 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, and 63.
7. The expression cassette of claim 1 , wherein the nucleic acid sequence to be expressed transgenically is selected from the group consisting of positive selection markers, negative selection markers, factors that provide a growth advantage and combinations thereof.
8. The expression cassette of claim 7 , wherein the positive or negative selection marker is selected from the group consisting of proteins that impart a resistance to antibiotics, metabolism inhibitors, herbicides, biocides and combinations thereof.
9. The expression cassette of claim 7 , wherein the positive or negative selection marker is selected from the group consisting of proteins that impart a resistance to phosphinothricin, glyphosate, bromoxynil, dalapon, 2-deoxyglucose 6-phosphate, tetracyclines, ampicillin, kanamycin, G418, neomycin, paromomycin, bleomycin, zeocin, hygromycin, chloramphenicol, sulfonyl urea herbicides, imidazolinone herbicides and combinations thereof.
10. The transgenic expression cassette of claim 7 , wherein the selection marker is selected from the group consisting of phosphinothricin acetyltransferases, 5-enolpyruvylshikimate 3-phosphate synthases, glyphosate oxidoreductases, dehalogenases, nitrilases, neomycin phosphotransferases, 2-desoxyglucose 6-phosphate phosphatases, acetolactate synthases, hygromycin phosphotransferases, chloramphenicol acetyltransferases, streptomycin adenylyltransferases, β-lactamases, tetA genes, tetR genes, isopentenyl transferases, thymidine kinases, diphtheria toxin A, cytosine deaminase (codA), cytochrome P450, haloalkanedehalogenases, indole acetic acid hydrolases, indole acetimide hydrolases, β-glucuronidases, mannose 6-phosphate isomerases, uridine diphosphate-galactose 4-epimerases and combinations thereof.
11. The transgenic expression cassette of claim 7 , wherein the positive or negative selection marker is encoded by a nucleic acid comprising the nucleic acid sequence of SEQ ID NO: 5, 65, 67, 69, 70, 72, 74, 75, 76, 78, 79, 80, 82, 84, 86, 88, 90, 92, 93, 94, 95, 96, 97, 98, 99, 101, 103, or 105; or a nucleic acid sequence encoding a polypeptide comprising the amino acid sequence of SEQ ID NO: 6, 66, 68, 71, 73, 77, 81, 83, 85, 87, 89, 91, 100, 102, 104, or 106.
12. A vector comprising the expression cassette of claim 1 .
13. A transgenic organism transformed with a vector comprising the expression cassette of claim 1 .
14. The transgenic organism of claim 13 , which is selected from the group of organisms consisting of bacteria, yeasts, fungi, animal, and plant organisms.
15. The transgenic organism of claim 13 , which is selected from the group of organisms consisting of Arabidopsis , tomato, tobacco, potatoes, corn, oilseed rape, wheat, barley, sunflowers, millet, beet, rye, oats, sugarbeet, bean plants and soybean.
16. A cell culture, plant or transgenic propagation material, obtained from the transgenic organism of claim 13 , wherein the cell culture, plant and transgenic propagation material comprise the expression cassette.
17. A method for transgenic expression of a nucleic acid in an organism comprising:
transgenically expressing a nucleic acid sequence in an organism, wherein said nucleic acid sequence is operably linked and heterologous to:
(i) a promoter comprising the sequence of SEQ ID NO: 1 or a fragment thereof; or
(ii) a promoter having at least 99% identity to the sequence of SEQ ID NO: 1 or 4,
wherein said promoter or said fragment thereof of part (i) and the promoter of part (ii) have constitutive promoter activity.
18. The method of claim 17 , wherein the fragment contains the sequence of SEQ ID NO: 4.
19. The method of claim 17 , wherein the nucleic acid sequence to be expressed is further operably linked to one or more genetic control sequences, and one or more additional functional elements.
20. The method of claim 17 , wherein the nucleic acid sequence to be expressed is further operably linked to one or more genetic control sequences; or one or more additional functional elements.
21. The method of claim 17 , wherein the nucleic acid sequence to be expressed transgenically enables:
expression of a protein encoded by said nucleic acid sequence, or
expression of a sense RNA, antisense RNA, or ribozyme encoded by said nucleic acid sequence.
22. The method of claim 17 , wherein the nucleic acid sequence to be expressed transgenically is selected from the group consisting of nucleic acids coding for selection markers, reporter genes, cellulases, chitinases, glucanases, ribosome-inactivating proteins, lysozymes, Bacillus thuringiensis endotoxin, α-amylase inhibitor, protease inhibitors, lectins, RNAases, ribozymes, acetyl-CoA carboxylases, phytases, 2S albumin from Bertholletia excelsa , antifreeze proteins, trehalose phosphate synthase, trehalose phosphate phosphatase, trehalase, DREB1A factor, farnesyl transferases, ferritin, oxalate oxidase, calcium-dependent protein kinases, calcineurins, glutamate dehydrogenases, N-hydroxylating multifunctional cytochrome P450, transcriptional activator CBF1, phytoene desaturases, polygalacturonases, flavonoid 3′-hydroxylases, dihydroflavanol 4-reductases, chalcone isomerases, chalcone synthases, flavanone 3-beta-hydroxylases, flavone synthase II, branching enzyme Q, starch branching enzyme, and combinations thereof.
23. The method of claim 17 , wherein the nucleic acid sequence to be expressed transgenically comprises a nucleic acid sequence selected from the group consisting of the nucleic acid sequence of SEQ ID NO: 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, and 64; or a nucleic acid sequence encoding a polypeptide comprising an amino acid sequence selected from the group consisting of the amino acid sequence of SEQ ID NO: 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, and 63.
24. A method for selecting a transformed organism comprising:
introducing a nucleic acid sequence coding for a selection marker to an organism, wherein said nucleic acid sequence is operably and transgenically linked to:
(i) a promoter comprising the sequence of SEQ ID NO: 1 or a fragment thereof; or
(ii) a promoter having at least 99% identity to the sequence of SEQ ID NO: 1 or 4, wherein said promoter or said fragment thereof of part (i) and the promoter of part (ii) have constitutive promoter activity;
selecting a transformed organism expressing said selection marker; and
isolating said selected transformed organism, and wherein said selected organism comprises said promoter of part (i) or part (ii).
25. The method of claim 24 , wherein the selection marker comprises a nucleic acid sequence selected from the group consisting of the nucleic acid sequence of SEQ ID NO: 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, and 64; or a nucleic acid sequence encoding a polypeptide comprising an amino acid sequence selected from the group consisting of the amino acid sequence of SEQ ID NO: 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, and 63.
26. The method of claim 24 , wherein the selection marker is selected from the group consisting of positive selection markers, negative selection markers, factors that provide a growth advantage, proteins that impart a resistance to antibiotics, metabolism inhibitors, herbicides, biocides, phosphinothricin acetyltransferases, 5-enolpyruvylshikimate 3-phosphate synthases, glyphosate oxidoreductases, dehalogenases, nitrilases, neomycin phosphotransferases, 2-desoxyglucose 6-phosphate phosphatases, acetolactate synthases, hygromycin phosphotransferases, chloramphenicol acetyltransferases, streptomycin adenylyltransferases, β-lactamases, tetA genes, tetR genes, isopentenyl transferases, thymidine kinases, diphtheria toxin A, cytosine deaminase (codA), cytochrome P450, haloalkanedehalogenases, indole acetic acid hydrolases, indole acetimide hydrolases, β-glucuronidases, mannose 6-phosphate isomerases, uridine diphosphate-galactose 4-epimerases and combinations thereof.
27. The expression cassette of claim 1 , wherein the promoter is of a plant origin.
28. A method for the production of a foodstuff, a feedstuff, or a seed comprising:
providing a transgenic organism comprising an expression cassette for transgenic expression of nucleic acids wherein said nucleic acid is operably linked and heterologous to:
(i) a promoter comprising the sequence of SEQ ID NO: 1 or a fragment thereof; or
(ii) a promoter having at least 99% identity to the sequence of SEQ ID NO: 1 or 4, wherein said promoter or fragment thereof of part (i) and the promoter of part (ii) have constitutive promoter activity;
propagating said transgenic organism or cell culture, part or transgenic propagation material obtained from said transgenic organism; and
producing a foodstuff, a feedstuff, or a seed from said transgenic organism or cell culture, part or transgenic propagation material obtained from said transgenic organism,
wherein said foodstuff, feedstuff, or seed from said transgenic organism, or cell culture, part or transgenic propagation material obtained from said transgenic organism comprise said expression cassette.
29. A plant cell, plant or part thereof, or propagation material obtained therefrom, which plant cell, plant or part thereof, or propagation material derived therefrom comprises the expression cassette of claim 1 .