WO2001011946A1 - Orge obtenue par construction presentant une teneur reduite en proteines gels - Google Patents
Orge obtenue par construction presentant une teneur reduite en proteines gels Download PDFInfo
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- WO2001011946A1 WO2001011946A1 PCT/JP2000/005476 JP0005476W WO0111946A1 WO 2001011946 A1 WO2001011946 A1 WO 2001011946A1 JP 0005476 W JP0005476 W JP 0005476W WO 0111946 A1 WO0111946 A1 WO 0111946A1
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- expression
- foldin
- hordin
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- nucleic acid
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/415—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from plants
-
- 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
- C12N15/8251—Amino acid content, e.g. synthetic storage proteins, altering amino acid biosynthesis
Definitions
- the present invention relates to producing rye with reduced gel protein in rye seeds.
- Seeds of wheat contain a large amount of seed-specific expressed proteins (seed storage proteins), of which 35-55% are alcohol-soluble hordin (Shewry 1993, Barley Chemistry and Technology. Ppl64: American Association of Cereal Chemistrys).
- hordins are classified into four types, B, C, D, and a, based on their locus and amino acid composition.
- the content ratio of B to C is 70 to 80%, C is 10 to 20%, and D is 5% or less.
- hordins have been reported to play a very important role as a source of amino acids in yeast in beer brewing, as well as to influence beer chromaticity and the formation of cold turbidity. These reports examine the impact of hordin on beer quality and the beer manufacturing process, rather than on individual hordin classes.
- the present invention is intended to reduce the amount of gel protein in barley by suppressing the production of D-form, which is contained in trace amounts in hordin, that is, D-hordin.
- D-hordin accounts for only about 5% of all hordins.However, according to the present invention, it is possible to reduce the amount of gel protein more unexpectedly by suppressing the production of D-hordin. According to what they found.
- the present invention relates to a method for producing rye with a reduced amount of gel protein that can be aggregated in a gel form during protein extraction from rye, comprising D foldin expression capable of suppressing the production of endogenous D-foldin protein of rye.
- An inhibitory nucleic acid is introduced into wheat, and the introduction of the D-hordin expression-inhibiting nucleic acid suppresses the production of the D-hordin protein and reduces the amount of gel protein.
- the D-foldin expression-suppressing nucleic acid is introduced into barley to suppress the production of the D-foldin protein, thereby making it possible to reduce the D-foldin protein fraction from the gel protein. Furthermore, although this D-hordin protein constitutes only a very small part of the gel protein, the reduction of the D-foldin protein that occupies this very small part results in the reduction of other proteins that constitute the gel protein. The quality can also be eliminated or reduced from the gel protein. As a result, according to the present invention, the total gel protein amount can be reduced more than expected.
- the D-foldin expression-suppressing nucleic acid can express an antisense RNA that is complementary to endogenous D-foldin RNA of wheat. And
- antisense D-foldin RNA is expressed in barley, which complements the endogenous D-foldin RNA, inhibits protein translation, and suppresses the production of D-foldin protein.
- the present invention relates to a D-foldin expression-suppressing nucleic acid that produces an antisense RNA that can be complementary to endogenous D-foldin RNA produced in wheat, which produces the antisense RNA downstream of a promoter that operates in the wheat.
- the D-hordin coding sequence encoding the D-hordin is characterized in that it is connected in the reverse direction.
- antisense D-foldin RNA is transcribed from the promoter, and this antisense D-foldin RNA binds complementarily to endogenous D-foldin RNA to bind D-foldin RNA. It can inhibit the translation of the underlying D-foldin protein.
- the D-hordin coding sequence is (1) the nucleotide sequence of SEQ ID NO: 1, (2) the nucleotide sequence of SEQ ID NO: 2, (3) the nucleotide sequence of SEQ ID NO: 1.
- the present invention relates to a vector containing the above-mentioned D-hordin expression-suppressing nucleic acid.
- the present invention is characterized in that a selectable marker expression cassette capable of expressing a selectable marker is provided near the D-foldin expression-suppressing nucleic acid.
- the provision of the selectable marker-one expression cassette makes it possible to select a strain into which the D-foldin expression-inhibiting nucleic acid has been introduced, using the selectable marker as a clue, and suppresses the expression of D-foldin.
- Strain ie, a gel protein reduced strain, can be quickly identified.
- a kit for producing a reduced germ protein of the present invention comprises the nucleic acid for suppressing D-foldin expression or the vector, wherein the nucleic acid for suppressing D-foldin expression or the vector is introduced into rye to reduce rye gel protein.
- the present invention also includes a method of producing any of the above-described gel protein-reduced rye or a rye produced by the kit for producing a gel protein-reduced rye according to any one of claims 8 to 9.
- FIG. 1 is a diagram showing the structure of the D-hordin expression suppression vector used in Example 1.
- FIG. 2 is a diagram showing a method for constructing the D-hordin expression suppression vector used in Example 1.
- FIG. 3 is a diagram showing the results of confirmation of an introduced gene by Southern blotting of the transformed barley of Example 2.
- FIG. 4 is a diagram showing SDS polyacrylamide gel electrophoresis analysis of the hordin fraction of the transformed barley seeds of Example 3.
- FIGS. 5A and 5B are diagrams showing the results of gel protein quantification of the transformed barley seeds of Example 4.
- FIG. 6 is a diagram showing a change in the composition of gel protein of the transformed barley seeds of Example 5.
- D-hordin protein is processed through the processes of transcription from chromosomal genes to RNA and translation of RNA into proteins. It can be executed by '
- methods for suppressing the expression of the D-hordin protein include the antisense method, the co-supression method, and the ribozyme method.
- its expression may be suppressed by modifying the D-hordin gene region that is the basis of the production of D-hordin protein.
- a gene targeting method can be employed.
- any method described above may be used as long as it can suppress the expression of D-hordin protein, but the method is highly reliable and specific.
- An antisense method can be suitably used as a highly reliable method.
- nucleic acid for suppressing expression of D-hordin gene The structure of the nucleic acid for suppressing the expression of D-foldin varies depending on the expression suppression method to be employed.
- the antisense method specifically binds the antisense RNA to the target D-hordin mRNA, thereby inhibiting the translation of the D-hordin mRNA into a protein. Therefore, when the antisense method is adopted, antisense D-foldin RNA can be used as an expression-suppressing nucleic acid, and the expression of D-foldin protein can be suppressed by directly supplying this antisense RNA to barley. Can be.
- an expression cassette that expresses antisense RNA can be used as the expression-suppressing nucleic acid.
- antisense RNA can be stably supplied in the transformed barley, and this property can be applied to the next-generation seed group and the like obtained from this transformant. It can be inherited.
- the above antisense D hordin expression cassette can be configured as follows.
- the homing D-hordin gene is operably linked downstream of the promoter expressed in the ripening endosperm tissue, and a transcription terminator that also functions in the ripening endosperm tissue is linked downstream. It can be created by
- the “Hordeum D hordin gene” is reversely linked downstream of the promoter so that antisense RNA can be generated. It is not necessary that the “Dwarf D hordin gene” introduced into this expression cassette has the entire region of the D hordin gene, but has a length that can inhibit translation from endogenous D hordin mRNA. If so, it may be a partial sequence of the D-hordin gene.
- the “Dwarf D-hordin gene” in the cassette may also be used if it can inhibit translation based on the endogenous D-holdin mRNA. It may be longer than mRNA, and may be one to which an arbitrary DNA fragment is added.
- sequences shown in SEQ ID NOs: 1 and 2 can be suitably used as the above-mentioned wheat D hordin gene, but sequences substantially identical to these sequences can also be used.
- This substantially identical sequence is, for example, a sequence having at least one of substitution, deletion, addition, and insertion in the above sequence and capable of suppressing the expression of the endogenous D-hordin gene.
- the transgene in the expression cassette is not limited to the “Homwort D hordin gene”, and a gene having high homology to the D hordin gene can also be used.
- a wheat macromolecule glutenin subunit gene or a rye macromolecule serine gene can be used as long as it can complementarily bind to endogenous D-hordin mRNA.
- transgene in the expression cassette used here may be genomic DNA, cDNA, or a gene obtained by manipulating these genes by synthesis or modification.
- promo evening in the expression cassette as long as it has a promoting evening activity in the ripening endosperm tissue.
- B Holdin Promoter C Holdin Promoter, A Holdin Promoter, Amylase Promo — Yuichi, Wheat Macromolecule Glutenin Subunit Promoter, Rye Macromolecule Serine Promoter, Ca 35S Promoter, Actin promo overnight.
- the transcription termination factor is not particularly limited as long as it functions in the endosperm tissue during ripening of barley, and for example, NOS 1 min, 1 min, 1 min and the like can be used.
- the D-foldin expression-suppressing nucleic acid may be, for example, a barley D-hordin gene as a transgene downstream of a promoter expressed in ripening mesendosperm tissue, and further downstream of the N0S Yuichiminator. Transcription end It can be created by connecting the factors.
- the transgene used here is a DNA fragment necessary for reducing D-hordin, and for example, the D-hordin gene can be suitably used. This transgene can then be inserted in the positive direction between the promoter and the transcription termination factor. Also, the transgene need not include the entire region expressed as mRNA, and may be a short gene fragment. Conversely, the transgene may be longer than the entire region expressed as mRNA, or may be one to which an arbitrary DNA fragment has been added.
- any gene having a high homology with the D-hordin gene can be used.
- a wheat macromolecule gluten-subunit gene or a rye macromolecule secarin gene can be used.
- the transgene used here includes genomic DNA, cDNA, and genes obtained by synthesizing, modifying and manipulating these genes.
- the “promo overnight” may be anything as long as it has promoter activity in the endosperm tissue during ripening of barley.
- the ribozyme method is a method in which D-hordin mRNA is degraded by a ribozyme (RNA enzyme) to suppress the expression of D-hordin. Therefore, the D-foldin gene expression-suppressing nucleic acid used in this method is expressed!
- a ribozyme designed gene capable of degrading foldin mRNA is prepared, and this gene is used as a promoter as described above. It can be constructed by positively linking to a transcription termination factor.
- nucleic acid for suppressing D-hordin expression requires restriction enzyme treatment. Procedures such as DNA cloning, DNA ligation, and transformation of Escherichia coli are required, which are performed using conventional techniques. For example, Molecular Cloning (Sambrook, Fritsch, aniatis. Cold Springharbor Laboratory) can be referred to.
- the cassette for suppressing the expression of a specific gene described in this section can be introduced into a plant chromosome as it is in a linear form, or incorporated into an arbitrary plasmid as described below and used as a vector for the expression of a specific gene expression suppressing gene. be able to.
- the expression-suppressing nucleic acid can be used directly as a nucleic acid fragment, but can be inserted into a vector and used as an expression-suppressing vector.
- the expression-suppressing vector can be prepared by inserting the above-described expression-suppressing nucleic acid into an arbitrary plasmid. Further, by sequentially linking a promoter, a structural gene, and a transcription termination factor to an arbitrary plasmid, an expression suppression vector can be simultaneously prepared together with the above-mentioned nucleic acid for expression suppression.
- the plasmid that can be used here for example, a commercially available one such as Plasmid ⁇ may be used, but it is preferable to select one according to the purpose. For example, when you want to collect a large number of vectors, it is desirable to select a plasmid with a large number of copies.
- the plasmid can be provided with a selection marker based on a drug (such as neomycin) or a nutritional component (eg, amino acid requirement) serving as an index when introducing the expression vector into an organism or the like. By providing this selection ability, a plant into which the expression vector has been introduced can be selected using the selection marker as an index.
- Construction of the above-mentioned D-foldin expression suppression vector requires operations related to gene cloning, such as restriction enzyme treatment, DNA ligation treatment, and transformation of Escherichia coli, which must be performed using conventional techniques. Can be. In this case, for example, Molecular Cloning (Sambrook, Fritsch, Maniatis, Cold Springharbor Laborator).
- the cell into which the expression-suppressing nucleic acid or the expression-suppressing vector containing the same is introduced is preferably a plant cell having a regeneration ability.
- Examples of such a cell include a cell derived from an immature embryo and a cell derived from an anther.
- a known method can be used. Specifically, in addition to the polyethylene glycol method, there are an election port method, a particle gun method, an agglomerator method and the like.
- the plant into which the expression-suppressing nucleic acid or the expression-suppressing vector has been introduced as foreign DNA is different from the pre-transformation property as a transformed plant. Form new varieties or breeds with reduced properties.
- the method of extracting and quantifying the gel protein from the seeds grown on the transformed barley can be performed by a known method. For example, use the method of Smith and Lister (Smith and Lister (1983), Journal of Cereal Science 1: 229-239) or Skerritt and Janes (Skerritt and Janes (1992), Journal of Cereal Science 16: 219-235) Can be. SDS polyacrylamide gel electrophoresis is effective for examining the composition of the obtained gel protein, but high performance liquid chromatography can also be used. Identification of each B, C, and D hordin can be performed based on known information based on the molecular weight. For example, Shewry (She wry (1993), Barley: Chemistry and Technology. ppl64: American Association of Cereal Chemists) is helpful.
- FIG. 1 shows the configuration of an expression suppression vector that expresses antisense RNA against D-hordin mRNA.
- the D-foldin expression suppression vector is provided with an antisense expression cassette 10 for expressing an antisense RNA against D-foldin mRNA as a D-foldin expression suppression nucleic acid.
- D-hordin cDNA 16 (SEQ ID NO: 1 or 2) is oriented downstream of the D-hordin promoter (D-hordin P) 14 (SEQ ID NO: 3), that is, 3 ′ ⁇ 5 ′. Connected in the direction. Further, downstream of this inverted D-hordin cDNA 16, 1 ⁇ ⁇ 3 ⁇ / ⁇ / ⁇ / ⁇ is connected.
- the D-hordin expression suppression vector contains the antisense expression cassette 1
- a selection marker expression cassette 12 is provided in a form in which the upstream and the upstream face each other (head to head).
- the selection marker expression cassette 12 includes neomycin phosphotransferase (NPT II) downstream of the arf promoter 20.
- NPT II neomycin phosphotransferase
- Gene 22 is connected, and NOS / Mine / 24 are connected downstream.
- Figure 2 shows the construction of the D Holdin vector.
- This DPP3Nhe2 vector is digested with the restriction enzymes BamHI and EcoRI, and contains BamHI- containing NOS / Mine / 118 from NOS derived from pBI221 (Clonetec) as a transcription termination factor.
- the EcoRI fragment was inserted and ligated together to obtain the DPP 3Nhe T vector (S 01) o
- this DPP3NheT vector was digested with the restriction enzyme BstX1, the ends were blunted and religated to obtain the DPP3NheTBXD vector (S02).
- the DPP3NheTBXD vector obtained here has a PmaCI site and a Sacl site between D-Holdin Promote and NOS and Mines.
- DPP3NheTBXD vector was erased with SacI to prepare a blunt-ended one (SO 3).
- pDH4 or pDH6 carrying D-hordin cDNA 16 is digested with EcoRI, and the EcoRI fragment containing the entire region of D-hordin cDNA (derived from pDH4: SEQ ID NO: 1, derived from pDH6: SEQ ID NO: 2) is blunt-ended. The fragment was prepared (S04). These two fragments were ligated, and the direction of D-foldin cDNA 16 was selected in a direction opposite to the promoter 114, and these were designated as DPADH4S and DPADH6S (SO5).
- the selection marker expression cassette was adjusted from pSBG121NH.
- neomycin phosphotransferase gene (neomycin phosphotransierase, Pharmacia; hereinafter, nptll gene) is ligated downstream of the arf promoter (SEQ ID NO: 4), and further N0S ⁇ ⁇ ⁇ Consolidated. Therefore, PSBG121NH was digested with Nhel, the expression cassette containing ⁇ gene 22 was recovered (S06), and this fragment was introduced into the Nhel site of DPADH4S and DPADH6S. After the introduction, those in which the selection marker expression cassette 12 and the antisense expression cassette 10 were linked head-to-head were selected, and these were designated as DPADH4NPT and DPADH6NPT (S07).
- Transformation of barley was carried out by using the polyethylene glycol method for protoplasts obtained from a cell line derived from immature embryos of the barley cultivar Igri. (DPADH4NPT or DPADH6NPT).
- Example 1 the two types of vectors prepared in Example 1 above were purified using Qiagen columns (manufactured by Quiagen), respectively; a TE buffer (10 mM Tris) was added to a concentration of g / ⁇ 1.
- the cells were suspended in HC1 (pH 7.5), ImM EDTA).
- Protoplasts were prepared by enzymatic treatment and purification from a liquid suspension cell line of cultivar Igri.
- the introduction of the vector into this protoplast was performed basically according to the method of Funatsuki et al. (Funatsuki et al. (1995) Theoritical and Applied Genetics 91: 707-712). That is, the obtained protoplasts were mixed with 50 ⁇ g of the above vector, 100 mM CaC12, 0.6 M sorbitol, 0.1% (w / v) MES, and adjusted to pH 5.7 with 250% Ca- Suspended in S (calcium sorbitol solution).
- the liquid medium and nurse cells were removed. Furthermore, in order to select only colonies having the NPTI I gene as the primary selection, the obtained colonies were cultured in a liquid medium containing G418 (dieneticin, manufactured by Gibco) at 20 or 25 / g / ml.
- G1418 resistant colonies were cultured with shaking for about 14 days, they were transferred to a regeneration medium containing G418 at the same concentration as the primary selection as secondary selection, and cultured. Colonies that had formed callus II embryoid bodies or differentiated shoots during the secondary selection process were transplanted into a modified L3 medium without G418 as transformed cell lines derived from independent protoplasts. Promoted regeneration of the body. When the green shoots reach 1-1 cm, move the petri dish under strong light, culture, and transfer to a hormone-free medium. Rooting was promoted and potted.
- DPADH4NPT is present, or DPADH6NPT
- DPADH4NPT DPADH4NPT
- the Southern Hybridization was carried out according to the manual of Boehringer. After washing the membrane after hybridization, the membrane was washed twice with 2X SSC and 1% SDS at room temperature for 30 minutes and then with 0.1X SSC and 0.1% SDS at 42 ° C for 30 minutes twice. . The signal was detected according to the manual of Behringer. As a result of detecting the transgene of each line of the obtained redifferentiated plant by Southern hybridization, the redifferentiated plant obtained from the section into which the introduction of the D-foldin expression suppression vector was attempted was obtained. The transgene was detected in 12 lines, 48 individuals, and in 10 lines, 23 individuals out of the regenerated plants obtained from the plot into which DPADH6NPT was introduced.
- FIG. 3 1 shows an example of detection of a transgene by hybridization.
- the signal of the endogenous D-hordin gene was detected in the DNA obtained from a regenerated plant into which the gene used as the control had not been introduced (Fig. 3, lane 8). From the regenerated plants, it was confirmed that signals other than the endogenous gene, that is, the transgene were present (FIG. 3, lanes 1 to 7, lanes 9 to 12).
- the effect of the D-hordin expression suppression vector was confirmed by measuring the D-hordin content in the transformant seeds from the electrophoretic band intensity, as shown below.
- Proteins were extracted from seeds (hereinafter referred to as T1 seeds) that grew into transformants in which the D-hordin expression-suppressing vector was confirmed to have been introduced above.
- T1 seeds seeds that grew into transformants in which the D-hordin expression-suppressing vector was confirmed to have been introduced above.
- one seed of the above is finely ground using a hammer, USD buffer (8 M urea, 0.1 M dithiothreitol, 50.0 mM sodium carbonate) is added, and the mixture is stirred. Incubated. Then, a transparent fraction (supernatant) obtained by centrifuging the sample at 15,000 rpm for 20 minutes was collected.
- the supernatant fraction obtained here was fractionated by SDS polyacrylamide gel electrophoresis, stained with Coomassie brilliant blue R250, and analyzed.
- Figure 4 shows the analysis results.
- the black diamonds indicate the bands of D-hordin.
- Fig. 4 shows an example of the electrophoresis of a soluble fraction of USD buffer and three T1 seeds of 90113AT15-14 lines into which DPADH6NPT was introduced.
- As negative controls commercially available Igri seeds and seeds of regenerated plants not transfected were used.
- the D-hordin expression-suppressing vector constructed in the present invention has an effect of reducing D-hordin specifically in transformed barley, that is, without substantially changing other hordin contents.
- SDS-soluble fraction (or “SDS fraction”).
- the fraction precipitated in the above centrifugation was 1.53 ⁇ 4 (w / v) SDS / 10% (v / v) 2-mercaptoethanol / 16% (v / v) N, N, -dimethylformamide (hereinafter, referred to as SDM) was added, and the mixture was stirred well and incubated at 45 ° C for about 20 hours.
- the sample after the incubation was centrifuged at 40,000 ⁇ g and 20 ° C. for 1 hour, and the obtained supernatant was dialyzed using 0.2% SDS. This dialysis is repeated 2 hours 3 times, and the volume is measured after dialysis did.
- the fraction obtained here is the "gel protein fraction" (or "gel fraction").
- TDS seeds used were examined for the presence of reduced D-foldin by SDS polyacrylamide gel electrophoresis as described above, and the transgene was separated (dropped). Data for T1 seeds, for which no reduction was observed, were deleted here.
- FIG. 5A shows the amount of gel protein in the gel fraction extracted per gram of sample and the standard error.
- D-horde occurs as a result of transgene isolation in T1 seed It was investigated how the amount of gel protein changes depending on the presence or absence of thinning.
- 90113AT15 Extracted gel protein from 10 T1 seeds obtained from the same individuals in 1 to 4 lines and qualitatively examined the amount of D-hordin reduction by electrophoresis. They were divided into groups (5 grains) in which no decrease was observed. After that, using these two groups of samples, the relationship between the presence or absence of this D-hordin reduction and the amount of gel protein was investigated. The results are shown in FIG. 5B.
- Fig. 5B As shown in Fig. 5B, the amount of gel protein (Fig. 5B: Sample 2) in the seed group (5 grains) in which the amount of D-hordin was decreased showed no decrease in the amount of D-hordin (5 seeds). (Fig. 5B: sample 1), it was found to be significantly lower (significant level 1%).
- T1 seeds (Fig. 6: lanes 4 and 8) with reduced D-hordein content compared to the control (Fig. 6: lanes 2, 3, 5, 6, 7, 9) originally had gel fractions.
- GS protein a specific protein that was extracted in large amounts per minute migrated to the SDS fraction.
- This result indicates that the decrease in gel protein caused by the introduction of the D-hordin expression suppression vector is not only attributable to the decrease in D-foldin, but also to the proteins that make up other gel proteins (at least GS protein). Is included in the gel fraction at the same time.
- the present invention it has been clarified that oats in which the gel protein which is considered to be highly relevant to wort filterability and wort extract amount is reduced by about 40% can be easily and efficiently produced.
- the present invention it is possible to reduce the time and labor conventionally required in the cross breeding method or the sudden breeding method, and to eliminate the need for breeding fields and radiation irradiation devices required for these methods. In both cases, it is possible to obtain germs with reduced gel protein quality.
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JP2001516311A JP3754648B2 (ja) | 1999-08-16 | 2000-08-16 | ゲルタンパク質低減オオムギの作出 |
CA002379259A CA2379259A1 (en) | 1999-08-16 | 2000-08-16 | Construction of barley with decreased gel protein content |
US10/048,987 US7074986B1 (en) | 1999-08-16 | 2000-08-16 | Construction of barley with reduced gel protein content |
AU65930/00A AU6593000A (en) | 1999-08-16 | 2000-08-16 | Construction of barley with decreased gel protein content |
EP00953438A EP1210869A4 (en) | 1999-08-16 | 2000-08-16 | BARLEY OBTAINED BY CONSTRUCTION HAVING REDUCED PROTEIN GEL CONTENT |
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JP11/229696 | 1999-08-16 | ||
JP22969699 | 1999-08-16 |
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WO2001011946A1 true WO2001011946A1 (fr) | 2001-02-22 |
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PCT/JP2000/005476 WO2001011946A1 (fr) | 1999-08-16 | 2000-08-16 | Orge obtenue par construction presentant une teneur reduite en proteines gels |
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US (1) | US7074986B1 (ja) |
EP (1) | EP1210869A4 (ja) |
JP (1) | JP3754648B2 (ja) |
AU (1) | AU6593000A (ja) |
CA (1) | CA2379259A1 (ja) |
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EP1577384A4 (en) * | 2002-12-20 | 2007-04-18 | Inc Admin Agency Naro | PLANT WITH REDUCED PROTEIN CONTENT IN SEED AND METHOD FOR THE PRODUCTION AND USE THEREOF |
WO2009021285A1 (en) | 2007-08-13 | 2009-02-19 | Commonwealth Scientific And Industrial Research Organisation | Barley with low levels of hordein |
MX2015017009A (es) | 2013-06-13 | 2016-12-15 | Commw Scient Ind Res Org | Cebada con niveles muy bajos de hordeinas. |
Citations (1)
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WO1998003655A2 (en) * | 1996-07-23 | 1998-01-29 | Sapporo Breweries Ltd. | Gene expression regulatory dna, expression cassette, expression vector and transgenic plant |
-
2000
- 2000-08-16 AU AU65930/00A patent/AU6593000A/en not_active Abandoned
- 2000-08-16 US US10/048,987 patent/US7074986B1/en not_active Expired - Fee Related
- 2000-08-16 EP EP00953438A patent/EP1210869A4/en not_active Withdrawn
- 2000-08-16 CA CA002379259A patent/CA2379259A1/en not_active Abandoned
- 2000-08-16 WO PCT/JP2000/005476 patent/WO2001011946A1/ja active Application Filing
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WO1998003655A2 (en) * | 1996-07-23 | 1998-01-29 | Sapporo Breweries Ltd. | Gene expression regulatory dna, expression cassette, expression vector and transgenic plant |
Non-Patent Citations (5)
Title |
---|
BRENNAN,C.S. ET AL: "The Production and Characterisation of Hor 3 Null Lines of Barley Provides New Information on the Relationship of D Hordein to Malting Performance", JOURNAL OF CEREAL SCIENCE, vol. 28, no. 3, 1998, pages 291 - 299, XP002936009 * |
DATABASE DNA DATA BANK OF JAPAN [online] 6 February 1999 (1999-02-06), HIROTA N.: "Barley hor3 mrna for d hordein, complete cds", XP003002499, Database accession no. D82941 * |
See also references of EP1210869A4 * |
SORENSEN,M.B. ET AL: "Hordein promoter methylation and transcriptional activity in wild-type and mutant barley endosperm", MOLECULAR AND GENERAL GENERICS, vol. 250, 1996, pages 750 - 760, XP002936011 * |
SORENSEN,M.B. ET AL: "Transcriptional and post-transcriptional regulation of gene expression in developing barley endosperm", MOLECULAR AND GENERAL GENERICS, vol. 217, 1989, pages 195 - 201, XP002936010 * |
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CA2379259A1 (en) | 2001-02-22 |
US7074986B1 (en) | 2006-07-11 |
EP1210869A1 (en) | 2002-06-05 |
JP3754648B2 (ja) | 2006-03-15 |
AU6593000A (en) | 2001-03-13 |
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