WO2002031164A1 - Proteine de farnesyl-pyrophosphate-synthase, acide nucleique et region promoteur de cette proteine - Google Patents
Proteine de farnesyl-pyrophosphate-synthase, acide nucleique et region promoteur de cette proteine Download PDFInfo
- Publication number
- WO2002031164A1 WO2002031164A1 PCT/JP2001/008816 JP0108816W WO0231164A1 WO 2002031164 A1 WO2002031164 A1 WO 2002031164A1 JP 0108816 W JP0108816 W JP 0108816W WO 0231164 A1 WO0231164 A1 WO 0231164A1
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- Prior art keywords
- nucleic acid
- seq
- sequence
- pyrophosphate synthase
- gene
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Classifications
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- C12N9/10—Transferases (2.)
- C12N9/1085—Transferases (2.) transferring alkyl or aryl groups other than methyl groups (2.5)
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- C—CHEMISTRY; METALLURGY
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- 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
- C12N15/8222—Developmentally regulated expression systems, tissue, organ specific, temporal or spatial regulation
- C12N15/8223—Vegetative tissue-specific promoters
- C12N15/8225—Leaf-specific, e.g. including petioles, stomata
-
- C—CHEMISTRY; METALLURGY
- 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
- C12N15/8222—Developmentally regulated expression systems, tissue, organ specific, temporal or spatial regulation
- C12N15/823—Reproductive tissue-specific promoters
- C12N15/8233—Female-specific, e.g. pistil, ovule
-
- C—CHEMISTRY; METALLURGY
- 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
Definitions
- the present invention relates to a hop farnesyl pyrophosphate (FPP) synthase gene and a promoter region of the gene.
- FPP hop farnesyl pyrophosphate
- Plants produce and accumulate a huge variety of low-molecular-weight organic compounds, such as tenorenoids, alkaloids, phenolics, and sapoyun. Initially, these compounds were referred to as secondary metabolites because they were not directly involved in the life support of living organisms, but merely as secondary functions.
- Farnesinolepyrophosphate synthase is known as an enzyme involved in the cascade of secondary metabolites in plants.
- Pharnesyl pyrophosphate synthase is an enzyme involved in the metabolism of isoprenide, which is the backbone of various substances such as pigments, fragrances, plant hormones, phytoalexins, and protective substances against pests in plants (Plant Biochemistrv).
- hops are the main ingredient that gives the refreshing bitterness and aroma of beer, but also in this hop, a large amount of secondary metabolites are secreted in lupulin gland hair contained in cones, and this secondary metabolite is It has been clarified that it greatly contributes to the bitterness and aroma of rice. Furthermore, in recent years, secondary metabolites of this hop have been shown to have pharmacological effects (eg, Biosci. Biotech. Biochem., 61 (1), 158, 1997). Due to this background, various breeds have been improved in hops, focusing on secondary metabolites such as bitterness and essential oil components accumulated in lupulin glands.
- hops are dioecious plants, and especially male strains have not been studied much because they do not bear cones, which are the raw materials for building, and are not regarded as commercially important. Little has been said about. For this reason, the conventional breeding method based on crossing relies heavily on experience and intuition, and in particular, the brewing quality cannot be predicted at all until cones actually grow. Therefore, in hops, it is strongly desired to isolate the above-mentioned funesyl pyrophosphate synthase gene, and to control secondary metabolites in hops and establish a synthesis method in vitro using a genetic engineering approach. It is rare.
- the transformation technique is a technique in which a foreign gene is directly introduced into a plant cell by expressing and expressing the foreign gene, but the foreign gene is expressed in a plant cell that controls the expression of the transgene.
- a functional promoter is linked to a structural gene of interest and a terminator operable in a plant cell, and this is introduced into a plant cell. When you enter, the method you take is adopted.
- promoters often used at the experimental level include the CaMV 35S promoter, a nopaline synthase gene promoter (Sanders PR et al.), which is capable of expressing a transgene in a relatively large number of plants regardless of tissues. al. Nucleic Acid Res, 15 (1987) 1543-1558).
- the exogenous gene is expressed in the target tissue because some of the transgene may harm plant growth and the like. It has been strongly desired to isolate such a tissue-specific promoter gene.
- the present invention has been made in view of the above-mentioned problems of the prior art, and includes a gene involved in the biosynthesis of a secondary metabolite in hops and a promoter gene that functions in a tissue-specific manner in hop lupulin gland hair.
- the purpose of this study is to elucidate the nucleotide sequence and to enable the transformation of hops by genetic engineering techniques and the synthesis of secondary metabolites of hops in vitro.
- the present inventors have conducted intensive studies to achieve the above-mentioned object, and as a result, have found that the gene for pharmacophorase synthase, which is strongly expressed in hop lubrinic gland hair and is involved in the biosynthesis of secondary metabolites, and its promoter. Gene was discovered, and the present invention was completed
- proteins 1 to 2 are provided. 1. A protein having the amino acid sequence of SEQ ID NO: 1 in the sequence listing.
- a protein characterized in that it has an amino acid sequence in which one or more amino acids have been deleted, substituted or added in the amino acid sequence described in SEQ ID NO: 1 of the sequence listing, and has a pharmacophoric acid synthase activity. .
- nucleic acid according to items 3 to 10.
- a nucleic acid comprising a part of the nucleotide sequence of SEQ ID NO: 3 in the sequence listing
- a nucleic acid characterized in that:
- a nucleic acid comprising a part of the base sequence described in SEQ ID NO: 2 of the Sequence Listing 9.
- base numbers 1 to 1886 A nucleic acid having a base sequence described below.
- a nucleic acid characterized in that it hybridizes with a nucleic acid having the nucleotide sequence described in the above 7 to 8 or a complementary nucleic acid under stringent conditions and has a promoter activity.
- FIG. 1 is a diagram showing a nucleic acid fragment obtained in the process of isolating the phanolenesyl pyrophosphate synthase gene of the present invention.
- FIG. 2 is a schematic diagram showing the principle of the inverse PCR method used in the present invention.
- FIG. 3 is a schematic diagram showing the principle of the casett ligation mediated PCR method used in this effort.
- FIG. 4 is a diagram showing a developed image of thin-layer mouth chromatography in which the activity of pharmacosyl pyrophosphate synthase of the present invention was measured.
- FIG. 5 shows the expression of the pharmacoprotein synthase gene of the present invention. It is a photograph of Northern analysis.
- nucleic acid in the present invention refers to, for example, a polynucleotide that can be DNA, RNA, or a derivatized active DNA or RNA, and preferably refers to DNA and / or RNA.
- examples of the form of the nucleic acid include genomic DNA (genomic DNA), cDNA, and mRNA.
- hybridizes under stringent conditions means that two nucleic acid fragments are expressed by Sambrook et al. (Sambrook, J.) in “Expression of cloned genes in Escherichia coli (E pressionofclonedgenes in E. coli). coli) ”(Molecular Cloning: A laboratory manu al (1989)) Cold Spring Laboratory Press, New York, USA, 9.47-9.62 and 1 1.45—11.61 Hybridization under the hybridization conditions described in (1).
- stringent conditions means, for example, that after hybridization at about 45 ° C with 6.0 XSSC, washing is performed at 50 ° C with 2.0 XSSC.
- the salt concentration in the washing step may be, for example, from about 2.0 XSSC, 50 ° C for low stringency to about 0.1 XSSC, 50 ° C for high stringency. You can select up to.
- the temperature of the washing step can be increased from room temperature (about 22 ° C) under low stringency conditions to about 65 ° C under high stringency conditions.
- promoter refers to a base sequence present on DNA, and a signal that plays a role in instructing initiation or termination of RNA synthesis (transcription) or regulation of the frequency thereof. Points to an array.
- promoter activity in the present invention means that the promoter functions to start, stop and regulate transcription as described above.
- the protein of the present invention is a hop huanesyl pyrophosphate synthase protein having an amino acid sequence having a 342 amino acid residue shown in SEQ ID NO: 1 in the sequence listing.
- the protein of the present invention may be a protein having farnesyl pyrophosphate synthase activity, in which one or more amino acids are deleted, substituted or added in the amino acid sequence described in SEQ ID NO: 1 in the sequence listing. It may also be a protein having a modified amino acid sequence.
- sugar chains are added to many proteins, and the addition of sugar chains can be regulated by changing one or more amino acids. Therefore, in the amino acid sequence of SEQ ID NO: 1 in the sequence listing, the protein in which the addition of the sugar chain is regulated is also included in the protein of the present invention as long as it has the above-mentioned funesyl pyrophosphate synthase activity.
- the present invention also includes a nucleic acid having a base sequence encoding the above-mentioned bulnesyl pyrophosphate synthase protein. That is, since there are a plurality of base sequences (codons) encoding one to three amino acids, there are many nucleic acids encoding the amino acid sequence shown in SEQ ID NO: 1 in the sequence listing. Therefore, such a nucleic acid is also included in the nucleic acid of the present invention.
- "encoding a protein” means that when the DNA is double-stranded, one of the complementary double strands includes a DNA having a base sequence encoding the protein.
- the nucleic acid of the present invention also includes a nucleic acid consisting of a base sequence directly encoding the amino acid sequence of SEQ ID NO: 1 in the sequence listing or a nucleic acid consisting of a complementary base sequence thereof.
- the nucleic acid of the present invention has the nucleotide sequence of SEQ ID NO: 3 in the sequence listing,
- cDNA a nucleic acid (cDNA) encoding silpyrophosphate synthase.
- nucleic acid of the present invention may be a nucleic acid consisting of a part of the base sequence of SEQ ID NO: 3.
- the nucleic acid of the present invention hybridizes under stringent conditions with a nucleic acid having a nucleotide sequence of 109 bases as set forth in SEQ ID NO: 3, and encodes a protein having a phanesyl pyrophosphate synthase activity. It may be a nucleic acid, and its base sequence is not particularly limited as long as this condition is satisfied. Furthermore, the nucleic acid of the present invention also includes a nucleic acid having a base sequence complementary to the nucleic acid that hybridizes under the stringent conditions.
- the base sequence of SEQ ID NO: 3 Some of the bases of the nucleic acid have deletion, substitution, insertion, addition, etc., and include nucleic acids encoding proteins having farnesyl pyrophosphate synthase activity.
- the deletion, substitution, insertion, and addition include not only short deletion, substitution, insertion, and addition of 1 to 10 bases, but also long deletion, substitution, and insertion of 10 to 100 bases. , Including addition.
- the term “farnesyl pyrophosphate synthase activity” refers to an activity of promoting a reaction for synthesizing farnesinolepyrophosphate by the catalytic action of farnesyl pyrophosphate synthase.
- the substance serving as a substrate for buarnesyl pyrophosphate synthase is not particularly limited as long as funesyl pyrophosphate is finally synthesized, but, for example, isopentenyl pyrophosphate ⁇ geraleylpyrophosphate is used. No.
- the geranyl pyrophosphate ⁇ ⁇ farnesyl pyrophosphate is considered to be a precursor of essential oil components such as myrcene, humulene, caryophyllene, and ⁇ arnesene, and thus the base represented by SEQ ID NO: 3 in the above sequence listing.
- SEQ ID NO: 3 the base represented by SEQ ID NO: 3 in the above sequence listing.
- the nucleic acid of the present invention also includes a nucleic acid comprising a part of the base sequence described in SEQ ID NO: 3 in the sequence listing.
- the nucleic acid of the present invention is a nucleic acid having the nucleotide sequence of SEQ ID NO: 2 in the sequence listing. Further, the nucleic acid of the present invention may be a part of the nucleic acid having a base sequence of 4699 bases described in SEQ ID NO: 2, and a base sequence represented by base numbers 1 to 1886 It may be.
- the nucleic acid having the nucleotide sequence set forth in SEQ ID NO: 2 is genomic DNA of furnesylbiphosphate phosphate synthase, and the base sequence encoding the open methylation of phagenesinolepyrophosphate synthase has the base sequence therein.
- the number is 1887-18989. Therefore, base numbers 1 to 1886 in the base sequence described in SEQ ID NO: 2 are 5, an untranslated region, and this region includes the promoter region of the pharmacophore synthase gene. Although it is difficult to strictly specify the boundaries between both ends of the promoter region among the base numbers 1 to 1886, a sequence consisting of a part of the base numbers 1 to 1886 may be used as long as it has promoter activity.
- the nucleic acid of the present invention is a nucleic acid having the base sequence of SEQ ID NO: 2 or a base number of this nucleic acid; It may be a nucleic acid that hybridizes with a nucleic acid having a base sequence represented by 1886 under stringent conditions and has a promoter activity, and the base sequence is not particularly limited as long as this condition is satisfied. Not done. Further, the nucleic acid of the present invention also includes a nucleic acid which hybridizes under the stringent conditions and has a nucleotide sequence complementary to the nucleic acid having promoter activity.
- the deletion, substitution, insertion and addition include not only short deletion, substitution, insertion and addition of 1 to 10 bases, but also long deletion, substitution, insertion and addition of 10 to 100 bases. .
- the nucleic acid of the present invention can be isolated through the following steps (1) to (5). In the steps (6) to (7), the isolated gene is converted to funesylpyrrophosphate synthase. It is possible to confirm the activity of the enzyme or the activity of the promoter.
- Hop genomic DNA can be prepared by a known method, for example, by the method of Wagner, DB, et al. (Proc. Natl. Acad. Sci. USA 84, 2097-2100 (1987)).
- a partial fragment of the funaresyl pyrophosphate synthase gene was obtained from other known plants, such as Arabidopsis thaliana and corn.
- a primer can be designed based on the nucleotide sequence of the above and isolated using a known method such as inverse PCR (Casett-ligation mediated PCR).
- inverse PCR Casett-ligation mediated PCR
- reverse PCR method as shown in the schematic diagram of Fig. 2, DNA as a sample is digested with a restriction enzyme, and the sample obtained by cyclizing the digestion product of the restriction enzyme before amplification is converted into a type II, and the normal PCR method is used.
- Specific examples of the inverse PCR method include the method of Liu, YG et al. (Ge noraics 25, 674-681 (1995)).
- Cassett-ligation mediated PCR is a method used when an unknown base sequence adjacent to a known base sequence is known as shown in the schematic diagram of FIG.
- a nucleic acid containing such a nucleic acid region is digested with a restriction enzyme to have the restriction enzyme recognition site.
- a region of an unknown base sequence sandwiched between regions having a known base sequence by linking one nucleic acid to the nucleic acid is amplified by PCR.
- the reverse PCR and / or Cassett-ligation mediated PCR the entire region and the entire region of the hops phnesyl pyrophosphate synthase gene can be determined.
- the promoter can be isolated.
- the nucleotide sequence of the isolated gene can be determined by a known method. For example, it can be performed according to the protocol attached to “ABI PRISM Dye Primer Cycle Sequencing Ready Reaction Kit” manufactured by PE Biosystems.
- the base sequence determined by the above method can be used for homology with a database (for example, http: // www. Ncbi. Nlm. Nih. Gov / BLAST /). By performing a search, it is possible to know the presence or absence and the degree of homology with known genes obtained from other plant species, and to determine whether the obtained genes are novel genes. It will be possible.
- total RNA can be prepared by a known method, for example, by the method of Chang, S. et al. (Plant Molecular Biology Report 11, 113-116 (1993)). Can be.
- the cDNA of the phagenesyl pyrophosphate synthase gene can be obtained simply by a known method.
- a primer is set based on the genomic DNA base sequence of the pharmacophoric acid synthase gene isolated in (2), and the cDNA synthesized from all RNAs is designated as ⁇ type.
- RT Isolated by PCR.
- a specific method in this case for example, a method described in a protocol attached to “Titan One Tube RT-PCR System” manufactured by Roche Diagnostics Inc. or the like can be used.
- the protein encoded by the farnesyl pyrophosphate synthase gene isolated in (5) is incorporated into the expression vector of the DNA of the farnesyl pyrophosphate synthase gene, and the vector is introduced into E. coli by introducing this vector into E. coli. It can be expressed in the cells of bacteria.
- the expression of the protein encoded by the pharynesyl pyrophosphate synthase and the purification of the protein can be performed, for example, by the purification described in the protocol attached to “QIAexpress Expression System” (manufactured by Qiagen). it can.
- the function of the pharmacoprotein expressed and purified in Escherichia coli can be confirmed by known methods. For example, the method of Sylvie A. et al. (Arch. Biochem. Biophys. 321, 493-500, (1995)).
- Northern hybridization analysis (hereinafter referred to as Northern analysis) In which tissues the isolated pharynesyl pyrophosphate synthase gene is expressed, or the promoter of the isolated pharynesyl pyrophosphate synthase gene is Which tissue is functioning can be analyzed by Northern analysis using the isolated phnesyl pyrophosphate synthase gene as a probe. For example, see "The DIG System User's Guide for Filter Hybridization J Soil, p. 53-55 (1995).
- nucleotide sequence disclosed in the present invention As a probe for hybridization, it is possible to detect at least the buarnesinolepirophosphate synthase gene expressed in hops.
- the distribution of gene expression can be identified by controlling gene expression in hop fibrous tissue. It is possible.
- the hybridization method itself is not particularly limited, and specifically, for example, Northern hybridization is used. Examples include hybridization, Southern hybridization, colony hybridization, dot hybridization, fluorescence insituhvbridization (FISH) insituhybridization (ISH), DNA chip method, and microarray method.
- FISH fluorescence insituhvbridization
- ISH insituhybridization
- DNA chip method DNA chip method
- microarray method microarray method.
- nucleotide sequence of the present invention When the nucleotide sequence of the present invention is used as a probe for hybridization, at least 20 nucleotides are required. Of the gene sequences of the present invention, genes having at least 20 consecutive nucleotides are required. Is preferably used. More preferably, those having a base length of 40 or more, particularly preferably 60 or more are used.
- the probe is preferably labeled so that it can be easily detected.
- the detectable label can be of any type or moiety that can be detected either visually or using an instrument. Commonly used detectable labels are, for example, radioactive labels such as 32 P, 14 C, 125 I, 3 H, 35 S.
- Biotin-labeled nucleotides can be incorporated into nucleic acids by nick translation, chemical and enzymatic means, and the like. Biotin-labeled props are detected after hybridization using labeling means such as avidin / streptavidin, fluorescent labeling agents, enzymes, and colloidal gold complexes. Nucleic acids may be labeled by binding to a protein. Alternatively, a nucleic acid cross-linked to a radioactive or fluorescent histone single-stranded binding protein may be used.
- Detection of the phnesyl pyrophosphate synthase gene can also be performed by using the Polymerase Chain Reaction (PGR) method using any of the disclosed nucleotide sequences as primers.
- PGR Polymerase Chain Reaction
- RNA can be extracted from the sample to be assayed and gene expression can be measured semi-quantitatively by RT-PCR. Such methods are performed in a manner known to the parties.
- the nucleic acid of the present invention When used as a primer for PCR, it must have a length of 10 to 60 bases, and among the nucleic acids of the present invention, a nucleic acid having 10 to 60 consecutive bases is preferable. Those having 15 to 30 bases are more preferably used.
- the GC content in the primer sequence is preferably 40% to 60%.
- the primer does not anneal at the 3rd terminus and does not have a secondary structure in the primer.
- the expression distribution of the huanesyl pyrophosphate synthase gene expressed in hops can be determined. It is possible to detect.
- the distribution of gene expression can be detected by using a part or all of the nucleotide sequence disclosed in the present invention as a hybridization probe or a PCR primer.
- the distribution of the gene expression can also be detected using a DNA chip, a microarray, or the like. That is, a part or all of the nucleotide sequence disclosed by the present invention can be directly pasted on a chip or an array.
- RNA extracted from the cells can be labeled with a fluorescent substance or the like and hybridized, and it is possible to analyze in which cells the gene is highly expressed.
- the DNA to be attached to the chip or the array may be a reaction product of PCR using a part or all of the nucleotide sequence disclosed by the present invention.
- nucleotide sequence disclosed in the present invention By using a part or all of the nucleotide sequence disclosed in the present invention, it is possible to clone a gene expressed at least in hops.
- a part or all of the nucleotide sequence disclosed in the present invention is used as a Northern hybridization probe, a colony hybridization probe or a PCR primer, and the nucleotide sequence disclosed in the present invention is used. It is possible to clone genes that include some, all or all.
- hop transformation it is possible to obtain information on hops phnesyl pyrophosphate synthase using the protein or nucleic acid of the present invention, perform hop transformation, produce secondary metabolites, etc. .
- the above-mentioned pharmacophorase synthase is an enzyme involved in the metabolism of isoprenoid, which is the basis of various substances such as pigments, aromas, plant hormones, phytoalexins, and defense substances against insects in plants. is there. Therefore, for example, by utilizing the pharmacophorase synthase gene isolated as described above, the metabolic system of pigments, aromas, plant hormones, phytoalexins, protective substances against pests and the like in plants can be controlled. For the genes that control these traits It is possible to go out.
- farnesyl pyrophosphate synthase gene isolated by the present invention and using farnesyl pyrophosphate synthase produced by a genetic engineering technique, a secondary metabolite of a plant is produced in a test tube. Becomes possible.
- funasesyl pyrophosphate synthase may be involved in the metabolic system of xanthohumol (Brauwelt, 36, 1998), which is said to have anticancer activity and its resin component in hops.
- nucleic acid of the present invention it is possible to control the metabolic system of hop resin component xanthohumol, and it is possible to use it as a genetic marker for a trait related to the resin component and xanthohumol. .
- hop breeding methods that had to rely on experience and intuition in the past can now be performed by genetic engineering techniques.
- By introducing the gene into hops it becomes possible to control the composition of secondary metabolites in leupulin gland hair. Therefore, it is possible to improve and maintain the quality of foods using hops (eg, beer and low-malt beer), or to improve the quality and efficiency of drugs using secondary metabolites.
- a gene to be introduced into a target hop and a terminator that functions in the hop are linked downstream of the promoter.
- the gene By introducing the gene into the hops, the gene can be specifically expressed in lupulin gland hair.
- hop genomic DNA was prepared as follows. That is, hop leaves are frozen and ground in liquid nitrogen, and 2% CTAB solution (2% cetyltrimethylammonium bromide, 0.1 M Tris ( ⁇ 9.5), 2 OmM EDTA, 1.4 M NaCl, 5% 3 mercaptoethanol) and incubated at 65 ° C for 30 minutes. The suspension was extracted twice with Clos form Z-isoamyl alcohol (24: 1), and 3Z4 volumes of isopropanol were added to precipitate DNA and RNA. Dissolve the precipitated DNA and RNA in High Salt TE buffer (1 M sodium chloride, 1 OmM Tris (pH 8.0), 1 mM EDTA), add RNase, and incubate at 60 ° C. Only disassembled. Two times the amount of isopropanol was added thereto to precipitate DNA, and the precipitated DNA was further washed with 70% ethanol and dissolved in water to obtain a genomic DNA sample.
- CTAB solution 2% cetyltrimethylammonium bro
- Primer 1 SEQ ID NO: 4
- Primer 2 SEQ ID NO: 5
- PCR was performed using hop genomic DNA as type III, and fragment 1 in FIG. 1 was obtained.
- primer 3 SEQ ID NO: 6
- primer 4 SEQ ID NO: 7
- primer 5 SEQ ID NO: 8
- primer 6 SEQ ID NO: 9
- hop genomic DNA is digested with restriction enzymes Bg1II or HindIII, and DNA digestion is performed using "DNA Ligation Kit Ver. 1" (Takara Shuzo).
- molecular ligation (Self ligation) was performed, and a part of the reaction solution after the completion of intramolecular ligation was subjected to PCR using Primer 3 and Primer ⁇ 5. .
- primers 4 and 6 shown in Table 1 to obtain fragment 2 and fragment 3 of FIG.
- primer 7 SEQ ID NO: 10
- primer 8 SEQ ID NO: 11
- primer 9 SEQ ID NO: 12
- Intramolecular ligation was performed on the hop genomic DNA digested with the restriction enzyme EcoRI, and this was used as a type II primer to perform PCR again using the above primers 7 and 9, obtaining fragment 4 in Fig. 1 and determining the nucleotide sequence. did.
- Fragment 5 in Fig. 1 is the “TaKaRa LA PCR in vitro Cloning Kit” (Takara Shuzo) )) And isolated according to the attached protocol. That is, the hop genomic DNA was digested with a restriction enzyme EcoRI, and the EcoRI adapter attached to the kit was ligated thereto. Next, PCR was performed using the primer 10 (SEQ ID NO: 13) designed based on the nucleotide sequence of the fragment 3 and the cassette primer C1 attached to the kit. Further, using this PCR reaction as a template, PCR was performed using primer 11 (SEQ ID NO: 14) designed based on the nucleotide sequence of fragment 3 and cassette primer C2 included in the kit to obtain fragment 5. The base sequence was determined.
- hop genomic DNA was subjected to PCR using primers 12 (SEQ ID NO: 15) and 13 (SEQ ID NO: 16) designed based on the nucleotide sequences of fragment 4 and fragment 5 in FIG. Fragment 6 containing the arnesyl pyrophosphate synthase gene and its promoter was obtained.
- the PCR was performed for all of the above PCRs using "Expand High-Fidelity PCR System" (Boehringer-Mannheim) according to the attached protocol.
- Both ends of the hop huanesyl pyrophosphate synthase gene and the fragment 6 containing the promoter obtained in Example 2 were blunt-ended using “TaKaRa BKL Kit” (Takara Shuzo) and subcloned into a pUC vector. .
- the blunting of both ends of fragment 6 and subcloning of the UC vector were performed according to the protocol attached to the kit.
- the nucleotide sequence was determined using “ABI PRISM Dye Terminator Cycle Sequencing Ready Reac- tion Kit” (PE Biosystems, ABI 373S) according to the attached protocol.
- the nucleotide sequence of fragment 6 is shown in SEQ ID NO: 2 in the sequence listing.
- Hop RNA leaves, stems, lupulin (1) fraction and norepurin (+) fraction were prepared as tissues for extracting total RNA.
- the lubrin (1) fraction is a fraction mainly collected from the outer bracts of sprouts with almost no lupulin gland hair
- the lupulin (+) fraction is a tissue other than lupulin gland hairs from sprouts. It is a fraction consisting mainly of lubricated glandular hair, which is removed as much as possible.
- tissue fractions were freeze-ground in liquid nitrogen, and 2% CTAB solution (2% cetyltrimethylammonium bromide, 0.1 M Tris (pH 9.5), 2 OmM EDTA, 1.4 M NaCl, 5% 3 mercaptoethanol) and kept at 65 ° C for 10 minutes.
- CTAB solution 2% cetyltrimethylammonium bromide, 0.1 M Tris (pH 9.5), 2 OmM EDTA, 1.4 M NaCl, 5% 3 mercaptoethanol
- After extracting twice with black form / isoamyl alcohol (24: 1) add 13 volumes of 10M lithium chloride, let stand, centrifuge at 15000 rpm for 10 minutes, and precipitate. Was dissolved in water.
- a DNase reaction buffer (10 OmM sodium acetate (pH 5.2), 5 mM magnesium chloride), and add DNase.
- the DNA was degraded by incubating at 37 ° C. A 1/3 volume of 10M lithium chloride was further added to the solution, left to stand, and centrifuged at 1500 rpm for 10 minutes. The precipitate was washed with 70% ethanol, dried, and dissolved again in water to obtain a total RNA sample.
- the cDNA of the huanesyl pyrophosphate synthase gene was obtained from the information of the farnesyl pyrophosphate synthase gene such as Arabidopsis thaliana whose base sequence is known. Estimating both ends of the coding region of the Kuze gene, designing a primer having a sequence obtained by adding a BamHI recognition sequence to the sequence, and using all the RNAs obtained in Example 4 as type RT as RT-PCR method was isolated. That is, the primer is primer 14 RT-PCR was performed using rTitan One Tube RT-PCR System J (Roche ⁇ Diagnostics Inc.) according to the attached protocol using (SEQ ID NO: 17) and primer 15 (SEQ ID NO: 18).
- the thus-obtained cDNA of the phagenesylpyrrophosphate synthase gene was subcloned into the pCR2.1 (manufactured by Invitroge Lio) vector to obtain pFPPS101R.
- the subcloned pharynesyl pyrophosphate synthase gene cDNA described above can be obtained from ABI PRISM Dye Terminator Cycle Sequencing Ready Reaction Kit J (manufactured by PE Biosystems) and DNA Sequencer ABI373S (manufactured by PE Biosystems)
- the nucleotide sequence of the obtained buarnesyl pyrophosphate synthase gene cDNA is shown in SEQ ID NO: 3 in the Sequence Listing, and the nucleotide sequence was determined by using the cDNA.
- the amino acid sequence of the protein is shown in SEQ ID NO: 1 in the sequence listing.
- the 660th base is different from the corresponding genomic DNA sequence (3737th base in SEQ ID NO: 2). This is considered to be a base incorporation error generated in RT-PCR performed when cDNA was isolated. However, since this error is the same as the originally encoded amino acid at the amino acid level, it does not affect the function analysis of the protein described in Example 6.
- the protein encoded by the isolated farnesyl pyrophosphate synthase gene was used.
- reaction was carried out at C for 30 minutes. Next, add 30 ⁇ l of a 10-fold concentration reaction buffer attached to alkaline phosphatase (manufactured by Wako Pure Chemical Industries), add 1 ⁇ l (10 units) of anorecaliphosphatase, and add the mixture at 37 ° C. After the reaction, the mixture was further reacted at 25 ° C. To the above reaction solution, 1 ⁇ l (4.5 nmo 1) of farnesol was added as a carrier, hexane 200 / x1 was further added and mixed, and the mixture was centrifuged at 1000 rpm for 1 minute.
- hexane layer was recovered, hexane 1001 was added again to the remaining aqueous layer, mixed and centrifuged, and the hexane layer was recovered and mixed with the previously recovered hexane layer.
- the signals from the reaction products are farnesol and gela-ol.
- Northern hybridization analysis was carried out to confirm in which tissue in the hops the amount of the isolated huanesyl pyrophosphate synthase gene was expressed and in what amount.
- the plasmid pFPPS101R prepared in Example 5 was digested with a restriction enzyme ⁇ I to obtain a linear form, which was referred to as “ ⁇ ”.
- the DIG RNA labeling kit (SP6 / T7) J ( Roche's Diagnostics Co., Ltd.) was used to prepare an RNA probe for the phenylnesyl pyrophosphate synthase gene according to the protocol attached to the kit described above.
- RNA in the leaf, stem, lubrin (1) fraction and lubrin (+) fraction prepared in Example 4 were each subjected to denaturing agarose gel (1.2% agarose, 6.2%). Electrophoresis was performed using 7% formaldehyde, 20 mM MOPS, 5 mM sodium acetate, 1 mM EDTA, pH 7.0). The gel after electrophoresis was shaken three times in distilled water for 40 minutes each to remove formaldehyde in the agarose gel, and then 20XS SC (0.3M sodium citrate, 3M sodium chloride, ⁇ > ⁇ 7.0 ) was used as a buffer to transfer the RNA in the agarose gel to a nylon membrane.
- 20XS SC 0.3M sodium citrate, 3M sodium chloride, ⁇ > ⁇ 7.0
- Hybridization was performed at 68 ° C using the nylon membrane onto which RNA was transcribed and the above probe.
- the hybridization buffer used for the hybridization was 5XSSC, 0.02% SDS, 0.1 o / oN-leuinoresanorecosin, 50% honolem amide. And 2% B locking Re agent (Roche Diagnostics).
- wash solution (0.1% SDS s 2 XSSC) twice at 68 ° C for 30 minutes, and then with a cleaning solution (0.1% SDS, 0.1 XSSC) for 30 minutes at 68 ° C. was performed twice.
- the RNA fragment to which the probe was hybridized was detected.
- the detection described above was performed according to the protocol described in "User Guide for Performing Hybridization Using DIG System"(Roche's Diagnostics Co., Ltd.).
- Fig. 5 shows the obtained results.
- the ratio of mRNA derived from the pharmacophorase synthase gene It was confirmed that the glandular hair was the most abundant, followed by the stem and the outer bract, and the least occupied ratio was the leaves. In other words, it was confirmed that the buarnesyl pyrophosphate synthase gene was most strongly expressed in lupulin gland hair, and the promoter of the pharmacokines was the highest in lupulin gland hair.
- the protein and the gene for pharmacoprotein pyrophosphate synthase can be identified, the genes involved in the biosynthesis of secondary metabolites in hops and the tissue specificity of hop lupulin gland hair are obtained.
- the nucleotide sequence of the promoter gene that functions functionally becomes clear, and it becomes possible to transform hops by genetic engineering techniques and synthesize secondary metabolites of hops in vitro.
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EP01974723A EP1327686A4 (en) | 2000-10-06 | 2001-10-05 | FARNESYLPYROPHOSPHATE SYNTHASE PROTEIN, NUCLEIC ACID AND ITS PROMOTIVE REGION |
JP2002534531A JPWO2002031164A1 (ja) | 2000-10-06 | 2001-10-05 | ファルネシルピロリン酸シンターゼタンパク質、核酸及びそのプロモーター領域 |
US10/148,188 US6933374B2 (en) | 2000-10-06 | 2001-10-05 | Farnesyl pyrophosphate synthase protein, nucleic acid and promoter region thereof |
US10/958,382 US7091019B2 (en) | 2000-10-06 | 2004-10-06 | Farnesyl pyrophosphate synthase proteins, nucleic acids and promoter regions therefor |
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US9289267B2 (en) * | 2005-06-14 | 2016-03-22 | Siemens Medical Solutions Usa, Inc. | Method and apparatus for minimally invasive surgery using endoscopes |
WO2009114939A1 (en) | 2008-03-17 | 2009-09-24 | National Research Council Of Canada | Aromatic prenyltransferase from hop |
CN103243065B (zh) * | 2013-05-30 | 2014-12-03 | 武汉大学 | 一种生产法尼烯的菌株及其应用 |
CN110658292B (zh) * | 2018-06-29 | 2021-03-26 | 华中科技大学 | 一种基于异戊烯化反应检测香叶酯焦磷酸含量的方法 |
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US5443978A (en) * | 1993-03-11 | 1995-08-22 | Agridyne Technologies, Inc. | Chrysanthemyl diphosphate synthase, corresponding genes and use in pyrethrin synthesis |
EP2175025A1 (en) * | 1998-04-14 | 2010-04-14 | Kyowa Hakko Bio Co., Ltd. | Process for producing isoprenoid compounds by using microorganisms |
TWI250210B (en) * | 1998-05-06 | 2006-03-01 | Dsm Ip Assets Bv | An isolated DNA sequence coding for an enzyme involved in the mevalonate pathway or the pathway from isopentenyl pyrophosphate to farnesyl pyrophosphate |
EP0955363A3 (en) | 1998-05-06 | 2004-01-28 | F. Hoffmann-La Roche Ag | Dna sequences encoding enzymes involved in production of isoprenoids |
AR021636A1 (es) * | 1998-12-17 | 2002-07-31 | Rubicon Forests Holdings Ltd | Materiales y metodos para la modificacion del contenido, la composicion y el metabolismo de los isoprenoides |
EP1033405A3 (en) * | 1999-02-25 | 2001-08-01 | Ceres Incorporated | Sequence-determined DNA fragments and corresponding polypeptides encoded thereby |
ATE417932T1 (de) * | 1999-06-22 | 2009-01-15 | Korea Kumho Petrochem Co Ltd | Farnesylpyrophosphat-synthase (fps) aus setzlingen der sonnenblume (helianthus annus) |
CA2394414A1 (en) | 1999-12-16 | 2001-06-21 | Basf Plant Science Gmbh | Moss genes from physcomitrella patens encoding proteins involved in the synthesis of tocopherols carotenoids |
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CN102876689A (zh) * | 2012-07-11 | 2013-01-16 | 浙江大学 | 茶树fps基因及其应用 |
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US20050076405A1 (en) | 2005-04-07 |
US6933374B2 (en) | 2005-08-23 |
CN100372939C (zh) | 2008-03-05 |
EP1327686A4 (en) | 2005-01-19 |
JPWO2002031164A1 (ja) | 2004-02-19 |
US7091019B2 (en) | 2006-08-15 |
CZ20022366A3 (cs) | 2003-04-16 |
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