WO2006030638A1 - ナガイモ由来マンノース特異的レクチンとその遺伝子 - Google Patents
ナガイモ由来マンノース特異的レクチンとその遺伝子 Download PDFInfo
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- WO2006030638A1 WO2006030638A1 PCT/JP2005/015848 JP2005015848W WO2006030638A1 WO 2006030638 A1 WO2006030638 A1 WO 2006030638A1 JP 2005015848 W JP2005015848 W JP 2005015848W WO 2006030638 A1 WO2006030638 A1 WO 2006030638A1
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- polypeptide
- dna
- amino acid
- lectin
- acid sequence
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Classifications
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- 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
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
- C12N15/8286—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance for insect resistance
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- 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
- C07K14/42—Lectins, e.g. concanavalin, phytohaemagglutinin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/146—Genetically Modified [GMO] plants, e.g. transgenic plants
Definitions
- the present invention relates to a lectin gene (DNA) having an insecticidal action and specifically recognizing mannose, and more particularly, to a mannose-specific lectin of Nagaimo (Dioscorea batatas) and its gene. More specifically, the present invention relates to a plant in which a DNA encoding a mannose-specific lectin having an insecticidal action and the above-described cloned DNA are incorporated using a mannose-specific lectin gene newly isolated from Nagamo. It relates to animals and microorganisms.
- Lectins are proteins that specifically recognize sugars and bind reversibly. Lectins were found in many plant-derived lectins, including legume seeds, and were found in all living organisms including vertebrates, invertebrates, mushrooms, microorganisms, and viruses. Many discussions have also been developed regarding the physiological significance of these lectins. In addition to their intrinsic roles such as cell differentiation, morphogenesis, and glycoprotein metabolism, bioprotection against bacteria and viruses, symbiosis and supplementation The external roles such as are also reported.
- Non-Patent Documents 1 and 2 pine snow lectin (Snowdrop lectin, Galanthus nivalis agglutinin, GNA), which is classified as a monocotyledonous mannose-binding lectin family, has been reported to impart insect resistance to plants that have been genetically modified.
- Non-Patent Documents 1 and 2 the safety of ingesting these lectin-modified plants is still well established.
- DB1 a lectin
- DB2 a storage protein
- DB3 a lectin having an affinity for maltose
- Bichininase DB4 was found and isolated at a ratio of 20: 50: 20: 10.
- the lectin (DB3) which has an affinity for maltose, consists of one subunit with a molecular weight of approximately 66 kDa and two subunits with a molecular weight of approximately 3 lkDa, each of which has homology with the storage protein ( It is revealed that the strength of 242 amino acid residues and 241 amino acid residues is 90%) (Non-patent Document 3).
- Patent Document 1 Japanese Patent Publication No. 10-506532
- Non-Patent Document 1 Fitches et al., Effects of Snowdrop Lectin (GNA) Delivered Via Artificial Diet and Transgenic Plants on the Development Tomato Moth (Lacanobia oleracea) Larvae in Laboratory and Glasshouse Trials, Journal of Insect Physiology, 43 (8), 727- 739 (1997).
- GAA Snowdrop Lectin
- Non-Patent Document 2 Rao et al., Expression of snowdrop lectin (GNA) in transgenic rice plants confers resistance to rice brown planthopper, The Plant Journal, 15 (4), 469-477 (1 998).
- GAA snowdrop lectin
- Non-Patent Document 3 Gaidamashviii, Characterization of the Yam Tuber Storage Proteins from Dioscorea batatas Exhibiting Unique Lectin Activities, The Journal of Biologica 1 Chemistry, 279 (25), 26028-26035 (2004).
- the problem to be solved by the present invention is to provide a gene for lectin having insecticidal activity, and further to provide this gene that is safer when taken by humans or animals such as domestic animals as food. Incorporating new insect-resistant organisms, especially plants (food) The
- the present invention relates to the following aspects.
- DNA according to claim 1 which also has a nucleotide sequence that encodes a polypeptide (protein) of the following (a) or (b): (a) SEQ ID NO: 1 to SEQ ID NO: 4 A polypeptide comprising the amino acid sequence shown; or (b) consisting of an amino acid sequence in which one or several amino acids are deleted, substituted or added in the amino acid sequence of (a), and the polypeptide of (a) A polypeptide having substantially the same biological activity as
- the DNA according to claim 2 which is the following DNA (a) or (b): (a) a DNA comprising any one of the nucleotide sequences represented by SEQ ID NO: 5 or SEQ ID NO: 8; (b) hybridizes with DNA containing a base sequence complementary to the base sequence of (a) under stringent conditions, and exhibits biological activity substantially the same as the polypeptide encoded by the DNA of (a). DNA that encodes a polypeptide.
- a recombinant vector comprising the DNA according to claim 1 or 3.
- polypeptide (a) or (b) (a) a polypeptide comprising the amino acid sequence shown in any one of SEQ ID NO: 1 to SEQ ID NO: 3, or (b) of (a) A polypeptide comprising an amino acid sequence in which one or several amino acids are deleted, substituted or added in the amino acid sequence, and having substantially the same biological activity as the polypeptide of (a).
- An insecticidal composition comprising the polypeptide according to claim 6 as an active ingredient.
- the invention's effect it is possible to introduce and express the gene for Nagano-derived mannose-specific lectin, which is a cultivated plant to eat, as an insect resistance gene in an organism such as a plant, and as a food with improved insect resistance. Even when ingested, safer recombinant plants can be produced.
- FIG. 1 is a graph showing the insecticidal action (A) of Nagaimo-derived mannose-specific lectin DB1-1 on tobacco moth (A) and the insecticidal action (B) on tobacco moth.
- the “polypeptide having substantially the same biological activity” indicates that the biological activities of the two polypeptides are the same in nature.
- biological activity means a specific biological action or activity that the polypeptide exerts on the outside world or an object (organism), for example, as shown in the Examples of the present specification. Such as hemagglutination lectin activity and insecticidal activity against organisms such as Z or insects.
- deletion, substitution or attachment of one or several amino acids is It preferably occurs in areas that are not related to Alternatively, amino acids having the same chemical properties (polarity, acidity, basicity, aromaticity, hydrophobicity, hydrophilicity, etc.) are preferably substituted.
- polypeptide having the amino acid sequence shown in any one of SEQ ID NO: 1 and SEQ ID NO: 4 is considered to be a pro-form, and therefore, in each amino acid sequence, the first A polypeptide lacking methionine and the second alanine is a mature protein that has a hemagglutinating lectin activity and an insecticidal activity against organisms such as Z or insects. It is an example of a “peptide”.
- under no stringent conditions means, for example, when the probe is labeled with DIG DNA Labeling (Cat No. 1175033 manufactured by Boehringer Mannheim) Hybridize in 32 ° C DIG Easy Hyb solution (Boehringer Mannheim Cat No. 1603558) and wash the membrane in 40 ° C O.lxSSC solution (containing 0.1% [w / v] SDS) Hybridize to the human DNA probe of the present invention by Southern blot hybridization under the following conditions (lxSSC is 0.15M NaCl, 0.015M sodium citrate) The condition is sufficient Hybridization can be performed according to a method known in the art such as the method described in Molecular cloning third. Ed. (Cold Spring Harbor Lab. Press, 2001) or a method analogous thereto. In addition, when using a commercially available library, it can be performed according to the method described in the attached instruction manual.
- a DNA that can hybridize with a DNA containing a base sequence complementary to a specific base sequence under stringent conditions for example, the degree of homology with the entire base sequence of the DNA is the average of the whole.
- the gene (DNA) of the present invention can be isolated and prepared using a known method.
- a method for isolating cDNA can be mentioned by using.
- the poly (A) + RNA can be directly amplified by ReverseTranscriptase Polymerase Chain Reaction (hereinafter abbreviated as “RT-PCR method”) using a predetermined primer.
- RT-PCR method ReverseTranscriptase Polymerase Chain Reaction
- these base sequences can be determined by the Didioxia termination method or the like.
- DNA obtained by using a degenerate codon that preserves the amino acid sequence or by changing the base by genetic engineering so as to be an optimal codon according to the host is also included in the category of the DNA of the present invention. included.
- the recombinant vector containing the DNA of the present invention can be easily prepared by any method known to those skilled in the art. That is, for example, as an expression vector for E. coli, pTV118N, 119
- Nagamo-derived lectin can be used in appropriate hosts such as Escherichia coli and plant cells.
- the recombinant vector of the present invention that produces can be constructed.
- the recombinant vector of the present invention includes, as desired, in the art.
- Known transcriptional regulatory elements such as promoters and enhancers, splicing signals, poly A addition signal, selection marker, replication origin, and the like can be added.
- the protein encoded by the DNA of the present invention can be expressed as a fusion protein with other proteins (for example, glutathione S-transferase, histidine tag, calmodulin binding protein, protein A, etc.). Is possible.
- Such a fusion protein can be cleaved using an appropriate protease and separated into each protein.
- An organism into which the DNA of the present invention is incorporated can be easily prepared by any method known to those skilled in the art.
- the recombinant vector constructed as described above is transformed into plants such as tobacco, arabidopsis, roses, or rice, animals such as rats and hamsters, or Escherichia coli, Bacillus subtilis, or It can be obtained by introducing it into a microorganism such as yeast and transforming it.
- the transformed organism thus obtained has excellent resistance particularly against insects and the like.
- the polypeptide of the present invention is a mannose-specific lectin, and particularly has excellent insecticidal activity against insects. Therefore, this polypeptide can be used as an active ingredient of an insecticidal composition.
- the insecticidal composition can be prepared and used by methods known to those skilled in the art. That is, the insecticidal composition can take any form such as condyles, powders, and liquids, and includes active ingredients other than the polypeptide of the present invention, buffering agents, excipients, solvents, solvents, and the like. Various auxiliary components can be included as appropriate. In addition, the content of the active ingredient and other ingredients can be appropriately selected by those skilled in the art according to the purpose of use and form of use.
- the protein-containing fraction was measured using a HiTrap Q column (5 ml) (made by Amersham Armasia), and the linear concentration of 0.3 M sodium chloride in 0 M force in 50 mM Tris-HCl buffer (pH 8.0). Elution was performed using a gradient, and the peak of DB1, which was a flow-through fraction, was collected.
- a specific degenerate oligonucleotide primer (SEQ ID NO: 10: 5, -TAYGAYAAYG GNAARGCNATHTGGGC-3, SEQ ID NO: 11: 5, -GCNGCNCCRTADATNACNAC RTT-3,) was synthesized, and the cDNA library (600 bp) encoding lectin was amplified by polymerase chain reaction (PCR) using the cDNA library prepared in (4) as a saddle. Subcloning into PCR-Blunt I I TOPO vector (Invitrogen) was introduced into Escherichia coli Top 10 strain to obtain a transformant.
- PCR-Blunt I I TOPO vector Invitrogen
- plasmid DNA was purified.
- the reaction for determining the base sequence was carried out using a dye terminator 1 DNA base sequencing reagent kit manufactured by ABI according to the manual specified by ABI.
- the primers used were SP6 primer and T7 primer.
- the nucleotide sequence was determined using a DNA sequencer 377A manufactured by ABI.
- a primer (SEQ ID NO: 12: 5'-CTGGT ATAAACGACCAGGTT-3, SEQ ID NO: 13: 5, TTTGTTGCTACTGGTATAAA-3,) is synthesized and the 5 'and 3' ends of the cDNA library Using the primers specific to the adapter sequence added to the nuclease, the entire nucleotide sequence of the mannose-specific lectin was determined by the 5 ′ RACE method and the 3 ′ RACE method.
- the lectin (DBl (Leu) DBl-l), which matches the amino acid sequence of protein, is the base sequence of the isolectin DBl (Cy s) with several amino acid substitutions (DB1-2, DB1-) 3 and DB1-4) were revealed.
- the nucleotide sequences thus determined are shown in SEQ ID NOs: 5-8.
- amino acid sequences that have been revealed to be encoded by them are shown in SEQ ID NOs: 1 to 4.
- hemagglutination lectin activity of the protein of the present invention was examined. Specifically, a 2-fold dilution series of the prepared lectin was prepared, mixed with 4% Usagi erythrocytes in an equal volume (50 1) on a round bottom 96-well microtiter plate, allowed to stand for 30 minutes, The agglutination reaction was observed. As a result, the protein of the present invention showed hemagglutination lectin activity at a minimum aggregation concentration of 2.7 g / ml.
- D-Darcose D-Acetyldarcosamine
- D-Galactoose D-Acetylgalatatosamine
- D-Xylose D-Fucose
- L-Arabinose L-Rhamnose
- Lattose Maltose
- Meribio Sucrose trehalose
- mannose 3.1 mM
- methyl ⁇ -mannose 1.5 mM
- a 1, 2-mannobiose 6.2 mM
- mannosyl- ⁇ 1, 3-D -Mannose 0.2 mM
- the protein of the present invention is a lectin specific to mannose.
- mannose-specific lectin DB1-1 was investigated by growth tests using tobacco and tobacco. Specifically, artificial diets containing 0.01% DB1-1, DB2 + DB3 + DB4 mixture and soybean lectin SBA were fed, and 15 larvae and 15 moths were born from eggs (7 larvae from moths). Stage, 5 larvae stages in tobacco moth), pupae, and further adult growth were observed. The number of moths and adult moths in the DB1-1 administration group decreased to half that in the control group, indicating that they have insecticidal activity (Fig. 1). In the figure, “SBA” represents soybean lectin. Industrial applicability
- the present invention it is possible to introduce a gene of mannose-specific lectin derived from Nagaimo, which is a cultivated plant that eats raw, into an organism such as a plant as an insect resistance gene, and when it is ingested as a food with improved insect resistance.
- Nagaimo is a cultivated plant that eats raw
- an organism such as a plant as an insect resistance gene
- safer recombinant plants can be produced, it can be highly expected as an industrially useful gene.
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Abstract
Description
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JP2004267417 | 2004-09-14 | ||
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011046177A1 (ja) * | 2009-10-14 | 2011-04-21 | クミアイ化学工業株式会社 | マンノース特異的レクチン前駆体に含まれるシグナルペプチド及び当該シグナルペプチドをコードする核酸並びにその利用 |
CN118027168A (zh) * | 2024-03-19 | 2024-05-14 | 广东现代汉方科技有限公司 | 基于真核表达的msl重组植物蛋白的制备方法及用途 |
-
2005
- 2005-08-31 WO PCT/JP2005/015848 patent/WO2006030638A1/ja active Application Filing
Non-Patent Citations (5)
Title |
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GAIDAMASHVILI M. ET AL: "Characterization of the Yam Tuber Storage Proteins from Dioscorea batatas Exhibiting Unique Lectin Activities.", J. BIOL. CHEM., vol. 279, no. 25, 18 June 2004 (2004-06-18), pages 26028 - 26035, XP002999821 * |
OIZUMI YUKI ET AL: "Nagaimo Kaikei Lectin-yo Chozo Tanpakushitsu no Kozo to Kino.", NIPPON NOGEI KAGAKUKAI TAIKAI KOEN YOSHISHU. (2003), vol. 2003, pages 236, 3C01A09, XP002999822 * |
RAO K. V. ET AL: "Expression of snowdrop lectin (GNA) in transgenic rice plants confers resistance to rice brown planthopper.", PLANT J., vol. 15, no. 4, 1998, pages 469 - 477, XP002163436 * |
TAKEDA NAOYUKI ET AL: "Yamuimorui ni okeru Lectin no Bunpu to Kochu Kassei.", NIPPON NOGEI KAGAKUKAI TAIKAI KOEN YOSHISHU., vol. 2005, 5 March 2005 (2005-03-05), pages 23, 29C003A, XP002999824 * |
VAN DAMME E. J. M. ET AL: "Molecular cloning and characterization of muultiple isoforms of the snowdrop (Galanthus nivalis L.) lectin.", PLANTA., vol. 186, 1991, pages 35 - 43, XP002999823 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011046177A1 (ja) * | 2009-10-14 | 2011-04-21 | クミアイ化学工業株式会社 | マンノース特異的レクチン前駆体に含まれるシグナルペプチド及び当該シグナルペプチドをコードする核酸並びにその利用 |
JP5769310B2 (ja) * | 2009-10-14 | 2015-08-26 | クミアイ化学工業株式会社 | マンノース特異的レクチン前駆体に含まれるシグナルペプチド及び当該シグナルペプチドをコードする核酸並びにその利用 |
CN118027168A (zh) * | 2024-03-19 | 2024-05-14 | 广东现代汉方科技有限公司 | 基于真核表达的msl重组植物蛋白的制备方法及用途 |
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