WO1997042331A1 - Verfahren zur herstellung transgener, inulin erzeugender pflanzen - Google Patents
Verfahren zur herstellung transgener, inulin erzeugender pflanzen Download PDFInfo
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- WO1997042331A1 WO1997042331A1 PCT/EP1997/002195 EP9702195W WO9742331A1 WO 1997042331 A1 WO1997042331 A1 WO 1997042331A1 EP 9702195 W EP9702195 W EP 9702195W WO 9742331 A1 WO9742331 A1 WO 9742331A1
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
- C12N9/1051—Hexosyltransferases (2.4.1)
- C12N9/1055—Levansucrase (2.4.1.10)
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8216—Methods for controlling, regulating or enhancing expression of transgenes in plant cells
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8242—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits
- C12N15/8243—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine, caffeine
- C12N15/8245—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine, caffeine involving modified carbohydrate or sugar alcohol metabolism, e.g. starch biosynthesis
- C12N15/8246—Non-starch polysaccharides, e.g. cellulose, fructans, levans
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
Definitions
- the present invention relates to a method for producing genetically modified, high-molecular inulin-producing plants, agents for carrying out this method and the plants obtainable with the aid of these agents and the method, and also the high-molecular inulin contained therein.
- High molecular weight, water-soluble, linear polymers for example polyacrylates and polymethylacrylates. These are used, for example, to increase the viscosity of aqueous systems, as a suspending agent, to accelerate sedimentation and complexation, and in superabsorbers for binding water and lacquers which can be diluted in water. It proves to be disadvantageous that these products are not biodegradable. Derivatized, highly polymeric polysaccharides can be used instead. Such polysaccharides can hitherto be obtained biotechnologically by fermentation and transglycosylation. However, due to economic considerations, polymers produced by fermentation are not suitable for applications on a larger scale.
- inulin a ⁇ -2-1 linked polyfructan
- inulin a ⁇ -2-1 linked polyfructan
- a number of gram-positive and gram-negative types of bacteria are also known among the bacteria, which synthesize a related fructan polymer, the ⁇ -2-6-linked levan, using so-called levan sucrases.
- Bacterially formed polyfructans have considerably higher molecular weights of up to 2000 kD.
- Streptococcus mutans which uses a ftf (fructosyltransferase) gene to form inulin on the basis of sucrose (Shiroza and Kuramitsu, J. Bacteriology (1988) 170, 810 to 816) .
- PCT / EP93 / 02110 discloses a process for the production of transgenic plants which produce polyfructose and which contain the lsc gene for a levan sucrase from a gram-negative bacterium.
- PCT / NL93 / 00279 discloses the transformation of plants with chimeric genes which contain the sacB gene from Bacillus subtilis or the ftf gene from Streptococus mutans. In the case of the sacB gene, a modification of the 5'-untranslated region of the bacterial gene is also recommended in order to increase the expression level in transformed plants. No sequence modifications to improve expression are described for the fructosyltransferase gene from Streptococcus mutans. The level of expression of fructosyltransferase is therefore comparatively low.
- the present invention is therefore based on the technical problem of providing a method and means for the production of high molecular weight inulin in plants which enable simple and inexpensive production of the inulin in large quantities in plants.
- the solution to this technical problem lies in the provision of a modified fructosyl transferase gene, in particular a gene in which one, preferably the amino terminal, region of a known fructosyl transferase gene is replaced by a region of a patatin gene and / or another gene .
- the preferred modification of the sequence of the known fructosyltransferase gene according to the invention thus consists in an exchange of the coding region of the amino terminal region of a fructosyltransferase gene for the amino terminal region of a patatin gene and / or other gene.
- the other gene can be, for example, the carboxypeptidase Y gene (cpy gene) or the lacZ gene.
- fructosyltrans- ferasegens is only replaced by a region of the patatin gene.
- a fructosyltransferase gene modified in this way can be efficiently expressed in higher plants, high-molecular inulin being obtained in large quantities.
- no extensive sequence modification or new synthesis of the original fructosyl transferase gene is necessary.
- a fructosyl transferase gene is understood to mean the coding DNA sequence of a gene whose gene product has a sucrose: ⁇ -D-fructosyl transferase activity.
- a gene can be of vegetable, animal, microbial or synthetic origin.
- modified fructosyltransferase genes are understood to mean the coding DNA sequences of modified genes whose gene products have a sucrose: ⁇ -D-fructosyltransferase activity and are capable of ⁇ -2-1 linked polyfructans, in particular inulins, to build.
- the gene products of the modified genes therefore have the biological activity of an inulin sucrase defined above.
- the term modification means all manipulations on a DNA sequence, for example nucleotide substitutions, deletions, inversions or additions.
- the amino terminal region of a gene is understood to mean the region of the coding DNA sequence which codes the amino terminal region of the gene product, wherein the amino terminal region of a gene can comprise many or a few codons, but also only the start codon alone.
- a patatin gene is understood to mean a gene belonging to the family of the patatin genes, which is for example a patatin gene can be class I or II (Rocha-Sosa et al., EMBO J (1989) 8, 23-29).
- a patatin gene is also understood to mean patatin-analogous genes which have sequence homology and / or functionality similar to the patatin genes.
- the patatin gene used according to the invention preferably originates from the potato, but can also be of synthetic or other origin.
- high-molecular inulin is understood to mean an inulin with a molecular weight of more than 1.5 million daltons.
- the invention relates to a modified fructosyltransferase gene in which the amino-terminal region of a fructosyltransferase gene is at least partially replaced by the region of a further gene, namely a patatin gene.
- a further gene namely a patatin gene.
- the fructosyltransferase gene can of course also have further modifications and / or be produced entirely synthetically.
- the invention also relates to all other modifications of a fructosyl transferase gene if the gene product formed can produce high molecular weight inulin in plants.
- the amino-terminal region of the fructosyltransferase gene by segregating from plant or bacterial genes or genes from yeast, in particular the patatin gene from preferably the potato and optionally another gene, for example the cpy Gene from yeast or the lacZ gene from Escherichia coli.
- the vegetable gene is the patatin B33 gene from the potato.
- the invention provides for the amino terminal region of the fructosyltransferase gene to be replaced by signal sequences of the patatin gene which encode signal peptides.
- the invention thus relates to modified fructosyltransferase genes in which the modification of the fructosyltransferase gene can consist in that the amino-terminal region of the fructosyltransferase gene is replaced by signal sequences of plant genes, such as, for example, the patatin gene from potato.
- the invention also includes modified fructosyltransferase genes in which the amino-terminal region of the fructosyltransferase gene is replaced by regions, in particular amino-terminal regions, of different genes, for example the amino-terminal area of the patatin gene and the lacZ gene.
- the amino-terminal region of the lacZ gene encodes the amino-terminal amino acids 21 to 30 of the ⁇ -galactosidase.
- the invention also includes modified fructosyltransferase genes, in which the amino-terminal region of the modified fructosyltransferase gene is provided by regions of various plant genes and genes from yeast, for example the cpy gene (carboxypeptidase Y) and the patatin gene from potato.
- the signal sequence coding for the signal peptide from the patatin gene is preferably arranged upstream (5 ') from the sequence of the cpy gene or the lacZ gene.
- the fructosyl transferase comes from Streptococcus mutans.
- the invention also relates to the use of other fructosyltransferases, as long as they can produce inulins in the modified form specified according to the invention.
- the amino-terminal region of the fructosyltransferase gene to be replaced represents a region coding for its signal peptide.
- the region coding for a signal peptide is the region between the start of translation and the beginning of the mature, processed protein coding Understand DNA sequence. 31 PC17EP97 / 02195
- the invention relates to a modified fructosyltransferase gene which has a signal sequence which codes a signal peptide for incorporating the modified gene into the endoplasmic reticulum of a eukaryotic cell.
- the invention therefore provides that a modified gene of the invention can be provided with signal sequences which allow the gene product to be localized in certain compartments of the cell.
- the signal sequence of a patatin gene in particular the patatin gene B33, preferably from potato, is particularly preferred.
- the signal sequence can be fused to the modified fructosyltransferase gene, or the signal sequence is fused directly to the fructosyltransferase gene that is shortened in its amino-terminal region.
- the amino-terminal region of the fructosyltransferase gene is replaced by at least part of the patatin gene and, if appropriate, additionally sequences from other genes, for example the lacZ gene or the cpy gene, in the amino-terminal region of the modified fructosyltransferase gene are present.
- the signal sequence encoding the signal peptide for inclusion in the endoplasmic reticulum is used from the amino-terminal area of the patatin B33 gene, the gene product is translocated into the apoplastic space. Consequently, the synthesis of the high molecular weight inulin is carried out there, so that specific changes in the carbohydrate composition of the transgenic plant can be achieved.
- other Si signal sequences can be used.
- signal sequences come into consideration which code signal peptides which lead to the inclusion of a protein in the endoplasmic reticulum and which can be demonstrated by the fact that they can be detected in the precursor proteins, but not in processed, mature proteins. As is known, the signal peptides are proteolytically removed during the uptake into the endoplasmic reticulum.
- the invention provides that the modified fructosyl transferase gene is fused or has a signal sequence which encodes a signal peptide for inclusion in the endoplasmic reticulum of a eukaryotic cell and for forwarding to the vacuole.
- a signal peptide for the vacuolar localization of the gene product is advantageous insofar as it can also effect specific changes in the carbohydrate composition of the transgenic plants obtained.
- signal peptides can, for example, be used for the vacuolar localization of lectin from barley (Raikhel and Lerner, Dev. Tague et al., Plant cell (1990) 2,533-546) and signal sequences from a patatin gene from potato.
- a modification of the fructosyltransferase gene is preferred in which a signal sequence of the patatin B33 gene, in particular one which contains the 60 amino-terminal amino acids of the Propeptide encoded (Rosahl et al., Mol Gen Genet (1986) 203, 214-220), ie the nt 736 to 855, is used.
- This signal sequence at least partially replaces the amino-terminal region of the fructosyltransferase gene, possibly together with other genes.
- this sequence is referred to as an extended B33 signal sequence. This sequence can be obtained both as a fragment of genomic DNA of the potato and from cDNA for the transcript of the B33 gene.
- the fusion of the extended B33 signal sequence to the modified gene of the invention or to the fructosyltransferase gene to be modified leads to the uptake of its gene product into the vacuole and thus to a specific change in the carbohydrate composition of the transgenic plant obtained.
- the invention also relates to the use of this extended B33 signal sequence or the peptide encoded thereby for the transport of any other gene products into plant vacuoles.
- the invention also relates to a vector, in particular a plasmid, containing a modified fructosyltransferase gene.
- the invention relates to a vector or a plasmid containing a modified fructosyltransferase gene which is under the control of a promoter active in plants, in particular an organ-specific promoter.
- sucrose is the substrate for fructosyltransferase, so that the production of high molecular weight inulin is particularly advantageous in those plant tissues or plant organs that store large amounts of sucrose.
- the expression of the modified fructosyltransferase gene in such organs can be achieved by using tissue-specific promoters.
- tissue-specific expression in potato tubers or beet from sugar beet is possible, for example, with the B33 promoter of the B33 gene from potato.
- the invention also relates to a vector or a plasmid in which the 3 'terminus of the modified fructosyltransferase gene is fused to a transcription termination sequence, for example the polyadenylation site of the nos gene from Agrobacterium tumefaciens.
- the invention relates to the plasmids pB33cftf, that is to say a plasmid containing the B33 promoter of the patatin gene, a lacZ-ftf gene fusion and a polyadenylation signal, pB33aftf, that is to say a B33 promoter of the patatin gene, a B33 signal sequence-lacZ-ftf gene fusion and a plasmid containing a polyadenylation signal, pB33vlftf, ie a B33 promoter of the patatin gene, an extended B33 signal sequence-lacZ-ftf gene fusion and a plasmid containing polyadenylation signal and pB33v2ftf, ie a patatin gene B33 promoter, an extended B33 signal sequence-lacZ-ftf gene fusion (without intron in signal sequence) and a plasmid containing polyadenylation signal (FI
- the invention also relates to the gene fusions contained in the aforementioned plasmids without using the lacZ gene sequences located between the patatin sequences and the ftf sequences.
- the invention also relates to prokaryotic and eukaryotic cells which contain a vector, a plasmid or a DNA sequence of the invention.
- the invention relates to the vectors, plasmids or DNA sequences of cells according to the invention, for example bacterial cells or, preferably, plant cells. These can contain the modified fructosyltransferase gene of the invention either transiently or, particularly preferably, stably integrated into their genome.
- the plant cells according to the invention are understood to be those which either originated directly from the transformation event and accordingly, depending on the chosen transformation method, can be undifferentiated or differentiated or differentiating or differentiated plant cells.
- the invention also relates to plants which contain at least one, but preferably a multiplicity, of cells which contain the fructosyl transferase gene according to the invention or vectors or plasmids containing it and, as a result thereof, produce high-molecular inulin.
- the invention thus makes it possible to provide plants of the most diverse types, genera, families, orders and classes which, owing to the modified fructosyltransferase gene which has been introduced, are able to produce high molecular weight inulin. Since the known plants are not able to produce high molecular weight inulin, the successful implementation of the method according to the invention is easy, for example by antibody tests.
- the inulin according to the invention produced by the gene of bacterial origin according to the invention has a higher molecular weight than vegetable inulin.
- the detection of successful transformation with the sequences according to the invention can be demonstrated, for example, by compartment-specific antibody tests, optionally with quantification.
- the invention provides in particular that the plant to be transformed is a useful plant, in particular a maize, rice, wheat, barley, sugar beet, sugar cane or potato plant.
- the invention also relates to a method for producing the abovementioned plants, comprising the transformation of one or more plant cells with a vector or a plasmid of the invention, the integration of the modified fructosyltransferase gene contained in this vector or plasmid into the genome of the plant cell (s) and the regeneration of the plant cell (s) to intact, transformed, high-molecular inulin-producing plants.
- the invention relates to the high-molecular inulin produced by the plants according to the invention. Compared to inulin naturally occurring in some plants, this is particularly characterized by its high molecular weight of more than 1.5 million daltons.
- the invention also relates to a method for obtaining inulin from the transformed plants, in particular from their vacuoles.
- Figure 1 illustrates the construction of plasmid pB33cftf.
- Figure 2 shows the construction of plasmid pB33aftf.
- Figure 3 illustrates the construction of plasmid pB33vlftf.
- Figure 4 illustrates the construction of plasmid pB33v2ftf.
- FIG. 5 shows a Northern blot analysis of the gene expression, ie the ftf-mRNA content, in tubers of selected transformants with the constructs according to the invention.
- FIG. 6 shows a thin layer chromatography analysis of the inulin contents of tubers in a series of plants transformed with the plasmid pB33vlftf.
- Embodiment 1 Production of the plasmid pB33cftf and introduction of the corresponding construct into the genome of potato.
- the plasmid pB33cftf contains the three fragments A, B and C in the binary vector pBinl9-Hyg (Bevan, Nucl Acids Res (1984) 12, 8711, modified according to Becker, Nucl Acids Res (1990) 18, 203) (cf. 1) .
- Fragment A contains the B33 promoter of the potato gene B33 of the potato. It contains a Dral fragment (position: -1512 to position +14) of the patatin gene B33 (Rocha-Sosa et al., EMBO J (1989) 8, 23-29), which is located between the EcoRI and the SacI- Interface of the polylinker of pBin19-Hyg is inserted.
- Fragment B is a fusion of nt 780-3191 of the ftf gene from Streptococcus mutans (Genbank EMBL Accession M18954) to a combination of nt 724-716 and nt 759-727 of the plasmid pBluescript KS, which contain the amino terminal amino acids 21-30 which represent ß-galactoside. Due to cloning, an ATG start codon arises before this sequence, which is used for the translation of the fusion product in plants. The sequence up to fusion at nt 780 of the ftf gene is shown below:
- nt 780-3191 of the ftf gene were isolated as Earl (filled up with DNA polymerase) / BglII fragment from the plasmid pTS102 (Shiroza and Kuramitsu, J Bacteriol (1988) 170, 810-816).
- fusing this fragment of the ftf gene to the DNA Sequence is the exchange of the original N-terminus for the amino-terminal region of the ⁇ -galactosidase.
- Fragment C contains the polyadenylation signal of gene 3 (octopine synthase gene from Agrobacterium tumefaciens) of the T-DNA of the Ti plasmid pTiAch 5 (Gielen et al., EMBO J.
- the plasmid pB33cftf has a size of approximately 14 kb.
- the construct pB33cftf was introduced into potato plants. Intact plants were regenerated from transformed cells. Analysis of the tubers of a number of plants transformed with this gene clearly showed the presence of inulin, which is due to the expression of the gene according to the invention.
- the plasmid pB33aftf contains the three fragments A, B and C in the binary vector pBinl9-Hyg (Bevan, Nucl Acids Res (1984) 12, 8711, modified according to Becker, Nucl Acids Res (1990) 18, 203) (cf. 2).
- Fragment A contains the B33 promoter of the potato gene B33 of the potato. It contains a Dral fragment (position: -1512 to position +14) of the patatin gene B33 (Rocha-Sosa et al., EMBO J (1989) 8, 23-29), which is between the EcoRI and the SacI- Interface of the polylinker of pBin19-Hyg is inserted.
- Fragment B is a fusion of the modified ftf gene from Streptococcus mutans (nt 780-3191, cf. Example 1) to nt 724 to 833 of the patatin gene B33 via a sequence of the nucleotides GTCGACGGTATCG.
- This sequence (designated as "a” in FIG. 2) contains the coding region for the signal peptide for inclusion in the endoplasmic reticulum (ER) (Rosahl et al., Mol Gen Genet (1986) 203, 214-220; sequence comes from pcT58). Proteins that have such a signal sequence are first included in the ER and then exported to the apoplastic space.
- Fragment C contains the polyadenylation signal of gene 3 (octopine synthase gene from Agrobacterium tumefaciens) of the T-DNA of the Ti plasmid pTiAch 5 (Gielen et al., EMBO J (1984) 3, 835-846), that is to say nucleotides 11749 -11939, which was isolated as a Pvu II-Hind III fragment from the plasmid pAGV 40 (Herrera-Estrella et al., Nature (1983) 303, 209-213) and after addition of Sph I linkers to the Pvu II site between the SphI and Hind HI sites of the polylinker from pBinl9-Hyg.
- gene 3 octopine synthase gene from Agrobacterium tumefaciens
- the plasmid pB33aftf has a size of approximately 14 kb.
- the B33aftf construct was introduced into potato plants. Intact plants were regenerated from transformed cells. Analysis of the tubers of a number of plants transformed with this gene clearly showed the presence of inulin, which is due to the expression of the gene according to the invention.
- the plasmid pB33vlftf contains the three fragments A, B and C in the binary vector pBinl9-Hyg (Bevan, Nucl Acids Res (1984) 12, 8711, modified according to Becker, Nucl Acids Res (1990) 18, 203) (cf. 3).
- Fragment A contains the B33 promoter of the potato gene B33 of the potato. It contains a Dral fragment (position: -1512 to position +14) of the patatin gene B33 (Rocha-Sosa et al., EMBO J (1989) 8, 23-29), which is between the EcoRI and the SacI- Interface of the polylinker of pBin19-Hyg is inserted.
- Fragment B is a fusion of the modified ftf gene from Streptococcus mutans (nt 780-3191, see Example 1) to nt 724 to 1399 of the patent gene B33 via a sequence of the nucleotides GTCGACGGTATCG.
- This sequence (designated as "VI” in FIG. 3) contains the coding region for the signal peptide for inclusion in the ER and the subsequent information for a signal for forwarding into the vacuole (Rosahl et al., Mol Gen Genet (1986) 203, 214-220, sequence comes from pgT5).
- An intron is inserted into the coding region of this expanded signal sequence.
- the nucleotide sequence of the intron is removed from the transcript of the chimeric gene by 'splicing'. Proteins that have such a signal peptide are first taken up in the ER and then transported into the vacuole.
- Fragment C contains the polyadenylation signal of gene 3 (octopine synthase gene from Agrobacterium tumefaciens) of the T-DNA of the Tl plasmid pTiAch 5 (Gielen et al., EMBO J (1984) 3, 835-846), that is to say nucleotides 11749 -11939, which was isolated as a Pvu II-Hind III fragment from the plasmid pAGV 40 (Herrera-Estrella et al., Nature (1983) 303, 209-213) and after addition of Sph I linkers to the Pvu II site between the SphI and Hind HI sites of the polylinker from pBinl9-Hyg.
- gene 3 octopine synthase gene from Agrobacterium tumefaciens
- the plasmid pB33vlftf has a size of approximately 14 kb.
- the construct B33vlftf was introduced into potato plants. Intact plants were regenerated from transformed cells. Analysis of the tubers of a number of plants transformed with this gene clearly showed the presence of inulin, which can be attributed to the expression of the gene according to the invention (see FIG. 6).
- the plasmid pB33v2ftf contains the three fragments A, B and C in the binary vector pBinl9-Hyg (Bevan, Nucl Acids Res (1984) 12, 8711, modified according to Becker, Nucl Acids Res (1990) 18, 203) (cf. 4).
- Fragment A contains the B33 promoter of the potato gene B33 of the potato. It contains a Dral fragment (position: -1512 to position +14) of the patatin gene B33 (Rocha-Sosa et al., EMBO J (1989) 8, 23-29), which is located between the EcoRI and the SacI- Interface of the polylinker of pBin19-Hyg is inserted.
- Fragment B is a fusion of the modified ftf gene from Streptococcus mutans (nt 780-3191, cf. Example 1) to a fragment (designated "V2" in FIG. 4) of the cDNA of the patatin gene B33.
- the cDNA contains the signal sequence mentioned in embodiment 3 for inclusion in the ER and for forwarding to the vacuole; however, the coding region is not interrupted by an intron (Rosahl et al., Mol Gen Genet (1986) 203, 214-220; nt 724-903 / 1293-1399, sequence comes from pcT58, (payment according to pgT5)). Proteins which have such a signal peptide are first taken up in the ER and then transported into the vacuole.
- Fragment C contains the polyadenylation signal of gene 3 (octopine synthase gene from Agrobacterium tumefaciens) of the T-DNA of the Ti plasmid pTiAch 5 (Gielen et al., EMBO J (1984) 3, 835-846), that is to say nucleotides 11749 11939, which has been isolated as a Pvu II-Hind III fragment from the plasmid pAGV 40 (Herrera-Estrella et al., Nature (1983) 303, 209-213) and after addition of Sph I linkers to the Pvu Il interface between the SphI and the Hind HI site of the polylinker from pBinl9-Hyg has been cloned.
- gene 3 octopine synthase gene from Agrobacterium tumefaciens
- the plasmid pB33v2ftf has a size of approximately 14 kb.
- the construct B33v2ftf was introduced into potato plants. Intact plants were regenerated from transformed cells. Analysis of the tubers of a number of plants transformed with this gene clearly showed the presence of inulin, which is due to the expression of the gene according to the invention.
- Tuber material was homogenized in 100 mM sodium acetate, pH 5.6 in the presence of insoluble polyvinylpyrrolidone (1 ml / 100 mg material), incubated for 30 min at 65 ° C. and then filtered at 65 ° C. 15 ml of homogenate were incubated with 15 ⁇ l RNAse A (1 mg / ml) and 15 ⁇ l DNAse (10 mg / ml) for 30 min at 37 ° C., then with 20 ⁇ l ProteinaseK (20 mg / ml) for 30 min at 60 ° C. . Inulin was precipitated from the homogenate by adjusting to 80% ethanol and centrifuged.
- the sediment was dissolved in 50 ⁇ l of water at 75 ° C. and precipitated again with 80% ethanol. The sediment was then dissolved in 30 ⁇ l of water at 75 ° C., 4 ⁇ l of the solution were analyzed by thin-layer chromatography or treated with an excess of endoinulinase at 56 ° C. for 15 min.
- Potato tubers are washed and then chopped with a grater (for example from Nivoba) to grater.
- the friction eggs are then passed with a water stream over hydrocyclones and divided into pulp, solid and amniotic fluid fractions.
- the solid fraction consisting essentially of inulin is cleaned by washing with water and dried.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP53949797A JP2001517930A (ja) | 1996-05-03 | 1997-04-29 | イヌリン産生性トランスジェニック植物の調製方法 |
US09/180,143 US6255562B1 (en) | 1996-05-03 | 1997-04-29 | Process for producing transgenic inulin-generating plants |
EP97921819A EP0944727A1 (de) | 1996-05-03 | 1997-04-29 | Verfahren zur herstellung transgener, inulin erzeugender pflanzen |
AU27741/97A AU718897B2 (en) | 1996-05-03 | 1997-04-29 | Process for preparing transgenic, inulin-producing plants |
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DE19617687.5 | 1996-05-03 | ||
DE19617687A DE19617687C2 (de) | 1996-05-03 | 1996-05-03 | Verfahren zur Herstellung transgener, Inulin erzeugender Pflanzen |
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WO1997042331A1 true WO1997042331A1 (de) | 1997-11-13 |
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PCT/EP1997/002195 WO1997042331A1 (de) | 1996-05-03 | 1997-04-29 | Verfahren zur herstellung transgener, inulin erzeugender pflanzen |
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Country | Link |
---|---|
US (1) | US6255562B1 (de) |
EP (1) | EP0944727A1 (de) |
JP (1) | JP2001517930A (de) |
AU (1) | AU718897B2 (de) |
DE (1) | DE19617687C2 (de) |
WO (1) | WO1997042331A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19749122A1 (de) * | 1997-11-06 | 1999-06-10 | Max Planck Gesellschaft | Nucleinsäuremoleküle codierend Enzyme, die Fructosyltransferaseaktivität besitzen |
EP0952222A1 (de) * | 1998-04-17 | 1999-10-27 | Centrum Voor Plantenveredelings- En Reproduktieonderzoek (Cpro-Dlo) | Transgene Pflanzen mit einem modifizierten Inulin produzierendem Profil |
DE19840028A1 (de) * | 1998-09-02 | 2000-03-09 | Max Planck Gesellschaft | Nucleinsäuremoleküle codierend Enzyme, die Fructosyltransferaseaktivität besitzen, und deren Verwendung |
WO2002050257A2 (de) * | 2000-12-21 | 2002-06-27 | Südzucker Aktiengesellschaft | Verfahren zur herstellung von polyfructanen |
DE10106163B4 (de) * | 2000-12-21 | 2007-03-29 | Südzucker AG Mannheim/Ochsenfurt | Verfahren zur Herstellung von Kohlenhydraten |
US7875763B2 (en) | 2000-10-30 | 2011-01-25 | E.I. Du Pont De Nemours And Company | Fructan biosynthetic enzymes |
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US7485715B2 (en) * | 1999-06-18 | 2009-02-03 | Ceres, Inc. | Sequence-determined DNA encoding AP2 domain polypeptides |
US7479555B2 (en) * | 1999-07-21 | 2009-01-20 | Ceres, Inc. | Polynucleotides having a nucleotide sequence that encodes a polypeptide having MOV34 family activity |
US20050257293A1 (en) * | 2002-09-17 | 2005-11-17 | Mascia Peter N | Biological containment system |
US7476777B2 (en) * | 2002-09-17 | 2009-01-13 | Ceres, Inc. | Biological containment system |
AU2003902253A0 (en) * | 2003-05-12 | 2003-05-29 | The University Of Queensland | Method for increasing product yield |
US9758790B2 (en) | 2004-12-08 | 2017-09-12 | Ceres, Inc. | Modulating the level of components within plants |
WO2006091676A2 (en) * | 2005-02-22 | 2006-08-31 | Ceres Inc. | Modulating plant alkaloids |
WO2006115575A1 (en) * | 2005-04-20 | 2006-11-02 | Ceres Inc. | Regulatory regions from papaveraceae |
US8124839B2 (en) * | 2005-06-08 | 2012-02-28 | Ceres, Inc. | Identification of terpenoid-biosynthesis related regulatory protein-regulatory region associations |
WO2007041536A2 (en) * | 2005-09-30 | 2007-04-12 | Ceres, Inc. | Modulating plant tocopherol levels |
US20090178160A1 (en) * | 2005-10-25 | 2009-07-09 | Joon-Hyun Park | Modulation of Triterpenoid Content in Plants |
US20070199090A1 (en) * | 2006-02-22 | 2007-08-23 | Nestor Apuya | Modulating alkaloid biosynthesis |
US20090222957A1 (en) * | 2006-04-07 | 2009-09-03 | Ceres Inc. | Regulatory protein-regulatory region associations related to alkaloid biosynthesis |
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DE4227061A1 (de) * | 1992-08-12 | 1994-02-17 | Inst Genbiologische Forschung | DNA-Sequenzen, die in der Pflanze die Bildung von Polyfructanen (Lävanen) hervorrufen, Plasmide enthaltend diese Sequenzen sowie Verfahren zur Herstellung transgener Pflanzen |
WO1994014970A1 (en) * | 1992-12-28 | 1994-07-07 | Stichting Scheikundig Onderzoek In Nederland | Method for obtaining transgenic plants showing a modified fructan pattern |
WO1995013389A1 (en) * | 1993-11-09 | 1995-05-18 | E.I. Du Pont De Nemours And Company | Transgenic fructan accumulating crops and methods for their production |
WO1996001904A1 (en) * | 1994-07-08 | 1996-01-25 | Stichting Scheikundig Onderzoek In Nederland | Production of oligosaccharides in transgenic plants |
Family Cites Families (1)
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AU3852089A (en) * | 1988-06-21 | 1990-01-12 | Calgene, Inc. | Methods and compositions for altering physical characteristics of fruit and fruit products |
-
1996
- 1996-05-03 DE DE19617687A patent/DE19617687C2/de not_active Expired - Fee Related
-
1997
- 1997-04-29 AU AU27741/97A patent/AU718897B2/en not_active Ceased
- 1997-04-29 US US09/180,143 patent/US6255562B1/en not_active Expired - Fee Related
- 1997-04-29 WO PCT/EP1997/002195 patent/WO1997042331A1/de not_active Application Discontinuation
- 1997-04-29 EP EP97921819A patent/EP0944727A1/de not_active Withdrawn
- 1997-04-29 JP JP53949797A patent/JP2001517930A/ja active Pending
Patent Citations (4)
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DE4227061A1 (de) * | 1992-08-12 | 1994-02-17 | Inst Genbiologische Forschung | DNA-Sequenzen, die in der Pflanze die Bildung von Polyfructanen (Lävanen) hervorrufen, Plasmide enthaltend diese Sequenzen sowie Verfahren zur Herstellung transgener Pflanzen |
WO1994014970A1 (en) * | 1992-12-28 | 1994-07-07 | Stichting Scheikundig Onderzoek In Nederland | Method for obtaining transgenic plants showing a modified fructan pattern |
WO1995013389A1 (en) * | 1993-11-09 | 1995-05-18 | E.I. Du Pont De Nemours And Company | Transgenic fructan accumulating crops and methods for their production |
WO1996001904A1 (en) * | 1994-07-08 | 1996-01-25 | Stichting Scheikundig Onderzoek In Nederland | Production of oligosaccharides in transgenic plants |
Non-Patent Citations (5)
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19749122A1 (de) * | 1997-11-06 | 1999-06-10 | Max Planck Gesellschaft | Nucleinsäuremoleküle codierend Enzyme, die Fructosyltransferaseaktivität besitzen |
US6664444B1 (en) | 1998-04-17 | 2003-12-16 | Tiense Suikerraffinaderij N.V. | Transgenic plants presenting a modified inulin producing profile |
EP0952222A1 (de) * | 1998-04-17 | 1999-10-27 | Centrum Voor Plantenveredelings- En Reproduktieonderzoek (Cpro-Dlo) | Transgene Pflanzen mit einem modifizierten Inulin produzierendem Profil |
WO1999054480A1 (en) * | 1998-04-17 | 1999-10-28 | De Stichting 'stichting Dienst Landbouwkundig Onderzoek' | Transgenic plants presenting a modified inulin producing profile |
DE19840028A1 (de) * | 1998-09-02 | 2000-03-09 | Max Planck Gesellschaft | Nucleinsäuremoleküle codierend Enzyme, die Fructosyltransferaseaktivität besitzen, und deren Verwendung |
US6872555B2 (en) | 1998-09-02 | 2005-03-29 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Nucleic acid molecules encoding enzymes having fructosyltransferase activity, and their use |
CZ300084B6 (cs) * | 1998-09-02 | 2009-01-28 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e. V. | Molekuly nukleové kyseliny kódující fruktosyltransferázu, vektor, hostitelská bunka, zpusob její prípravy a použití, rostlinná bunka, rostlina, zpusob prípravy rostliny, rozmnožovací materiál, skliditelné cásti rostliny, fruktosyltransferáza, zpusob |
US7588922B2 (en) | 1998-09-02 | 2009-09-15 | Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften E.V. | Nucleic acid molecules encoding enzymes having fructosyltransferase activity, and their use |
US7906707B2 (en) | 1998-09-02 | 2011-03-15 | Max-Planck-Gesellschaft zur Forderund der Wissenschaften B.V. | Nucleic acid molecules encoding enzymes having fructosyltransferase activity, and their use |
US7875763B2 (en) | 2000-10-30 | 2011-01-25 | E.I. Du Pont De Nemours And Company | Fructan biosynthetic enzymes |
US8168862B2 (en) | 2000-10-30 | 2012-05-01 | E.I. Du Pont De Nemours And Company | Fructan biosynthetic enzymes |
US8399738B2 (en) | 2000-10-30 | 2013-03-19 | E I Du Pont De Nemours And Company | Fructan biosynthetic enzymes |
WO2002050257A3 (de) * | 2000-12-21 | 2003-01-30 | Suedzucker Ag | Verfahren zur herstellung von polyfructanen |
WO2002050257A2 (de) * | 2000-12-21 | 2002-06-27 | Südzucker Aktiengesellschaft | Verfahren zur herstellung von polyfructanen |
DE10106163B4 (de) * | 2000-12-21 | 2007-03-29 | Südzucker AG Mannheim/Ochsenfurt | Verfahren zur Herstellung von Kohlenhydraten |
Also Published As
Publication number | Publication date |
---|---|
AU2774197A (en) | 1997-11-26 |
JP2001517930A (ja) | 2001-10-09 |
DE19617687A1 (de) | 1997-11-06 |
EP0944727A1 (de) | 1999-09-29 |
AU718897B2 (en) | 2000-04-20 |
US6255562B1 (en) | 2001-07-03 |
DE19617687C2 (de) | 2000-11-16 |
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