CN107022010B

CN107022010B - Novel insecticidal protein and nucleotide sequence thereof

Info

Publication number: CN107022010B
Application number: CN201710219921.0A
Authority: CN
Inventors: 束长龙; 耿丽丽; 张�杰; 曹蓓蓓; 宋福平; 彭琦
Original assignee: Institute of Plant Protection of Chinese Academy of Agricultural Sciences
Current assignee: Institute of Plant Protection of Chinese Academy of Agricultural Sciences
Priority date: 2017-04-06
Filing date: 2017-04-06
Publication date: 2020-08-07
Anticipated expiration: 2037-04-06
Also published as: CN107022010A

Abstract

The present invention relates to a novel insecticidal protein and its nucleotide sequence. The pesticidal protein has an amino acid sequence as at least one of (I) and (II): (I) an amino acid sequence shown as SEQ ID No. 2; (II) an amino acid sequence which has more than 95% of consistency with the amino acid sequence shown as SEQ ID No.2 and has the same function with the amino acid sequence shown as SEQ ID No. 2; preferably, the amino acid sequence has more than 98 percent of consistency with the amino acid sequence shown as SEQ ID No.2 and has the same function with the amino acid sequence shown as SEQ ID No. 2.

Description

Novel insecticidal protein and nucleotide sequence thereof

Technical Field

The present invention relates to a novel insecticidal protein and its nucleotide sequence.

Background

Bacillus thuringiensis (Bt for short) is a gram-positive bacterium with wide distribution, is an entomopathogenic microorganism with strong toxicity to pests and no toxicity to natural enemies, and has no toxicity to higher animals and people. It is the microbial pesticide which is the most deeply researched and widely used at present and has activity on more than 16 pests of 3000 meshes.

The prior art has generally recognized that Bt can be pesticidally active, primarily due to its ability to produce a variety of Cry, Cyt and Vip proteins.

However, it has been rarely reported that Bt is also capable of producing pesticidal actives other than the above three proteins, particularly pesticidal actives with superior activity against certain coleopteran (Coleoptera) pests, such as Holotrichia parallela (Holotrichia oblita).

Disclosure of Invention

One of the present applications provides an insecticidal protein having an amino acid sequence as at least one of (I) and (II):

(I) an amino acid sequence shown as SEQ ID No. 2;

(II) the amino acid sequence which has more than 95 percent of consistency with the amino acid sequence shown as SEQ ID No.2 and has the same function with the amino acid sequence shown as SEQ ID No. 2.

It is within the scope of the present application that the pesticidal protein defined by (II) can achieve effects equivalent to or superior to the amino acid sequence shown in SEQ ID No.2 while having the same function as the amino acid sequence shown in SEQ ID No. 2. However, it is within the scope of the present application that the pesticidal protein defined by (II) achieves a slightly inferior effect to the amino acid sequence shown in SEQ ID No.2, for example, an effect of 50% to 99.999% of the effect of the amino acid sequence shown in SEQ ID No.2, while achieving the same function as the amino acid sequence shown in SEQ ID No.2, without affecting the use of the pesticidal protein.

In a specific embodiment, the amino acid sequence of the insecticidal protein is preferably an amino acid sequence which has more than 98% identity with the amino acid sequence shown as SEQ ID No.2 and has the same function as the amino acid sequence shown as SEQ ID No. 2. The insecticidal protein defined in this way can obtain an effect equivalent to or better than the amino acid sequence shown as SEQ ID No.2 while having the same function as the amino acid sequence shown as SEQ ID No.2, which is within the scope of the present application. However, it is within the scope of the present application to obtain a slightly inferior effect, for example 50% to 99.999% of the effect, of the amino acid sequence shown in SEQ ID No.2, of the insecticidal protein defined by (II) while obtaining the same function as the amino acid sequence shown in SEQ ID No.2, without affecting the use of the insecticidal protein.

In one embodiment, the amino acid sequence of the insecticidal protein is preferably an amino acid sequence which has more than 99% identity with the amino acid sequence shown as SEQ ID No.2 and has the same function as the amino acid sequence shown as SEQ ID No. 2. The insecticidal protein defined in this way can obtain an effect equivalent to or better than the amino acid sequence shown as SEQ ID No.2 while having the same function as the amino acid sequence shown as SEQ ID No.2, which is within the scope of the present application. However, it is within the scope of the present application to obtain a slightly inferior effect, for example 50% to 99.999% of the effect, of the amino acid sequence shown in SEQ ID No.2, of the insecticidal protein defined by (II) while obtaining the same function as the amino acid sequence shown in SEQ ID No.2, without affecting the use of the insecticidal protein.

In one embodiment, the amino acid sequence of the insecticidal protein is preferably an amino acid sequence which has a more than 99.5% identity with the amino acid sequence shown as SEQ ID No.2 and has the same function as the amino acid sequence shown as SEQ ID No. 2. The insecticidal protein defined in this way can obtain an effect equivalent to or better than the amino acid sequence shown as SEQ ID No.2 while having the same function as the amino acid sequence shown as SEQ ID No.2, which is within the scope of the present application. However, it is within the scope of the present application that the insecticidal protein defined by (II) achieves a slightly inferior effect, for example 50% to 99.999% of the effect of the amino acid sequence shown in SEQ ID No.2, while achieving the same function as the amino acid sequence shown in SEQ ID No.2, without affecting the use of the insecticidal protein.

In a specific embodiment, the insecticidal protein can also be a protein with the same function as the insecticidal protein with the amino acid sequence shown in (I) after the amino acid sequence shown in (I) is substituted and/or deleted and/or one or more amino acids are added. The insecticidal protein defined in this way can obtain an effect equivalent to or better than the amino acid sequence shown as SEQ ID No.2 while having the same function as the amino acid sequence shown as SEQ ID No.2, which is within the scope of the present application. However, it is within the scope of the present application to obtain a slightly inferior effect, for example 50% to 99.999% of the effect, of the amino acid sequence shown in SEQ ID No.2, of the insecticidal protein defined by (II) while obtaining the same function as the amino acid sequence shown in SEQ ID No.2, without affecting the use of the insecticidal protein.

The insecticidal activity of the insecticidal protein of the application on pests, particularly on Holotrichia parallela in North China is remarkably superior to that of the insecticidal protein in the prior art, and the insecticidal protein can make up for the defect that Cry8G protein is weak in insecticidal activity on Holotrichia parallela in North China. Therefore, the method enriches insecticidal protein resources, provides a new gene source for transgenic crops and engineering strains, improves the insect-resistant effect of Bt transgenic products, and has important economic, social and ecological benefits.

The second aspect of the present application provides a nucleotide sequence encoding any one of the pesticidal proteins according to the first aspect of the present application. The nucleotide sequence can be obtained by taking a source strain thereof as a template or a cloned full-length DNA fragment as a template through PCR amplification; it can also be artificially synthesized according to a given sequence.

In a specific embodiment, when the amino acid sequence of the pesticidal protein is shown as SEQ ID No.2, the nucleotide sequence encoding the pesticidal protein is shown as SEQ ID No. 1.

The third application provides a composition comprising at least one insecticidal protein according to one of the first to third applications.

The fourth aspect of the present application provides a transgenic microorganism comprising the nucleotide sequence of the second aspect of the present application and capable of producing the pesticidal protein of the first aspect of the present application.

In a particular embodiment, it is preferred that the transgenic microorganism comprises at least one of Bacillus (Bacillus), Pseudomonas (Pseudomonas), enterobacter (Escherichia), and yeast (Saccharomyces).

In a specific embodiment, it is preferable that the Bacillus includes at least one of Bacillus thuringiensis (Bacillus thuringiensis), Bacillus subtilis (Bacillus subtilis), Bacillus atrophaeus (Bacillus atrophaeus) and Bacillus cereus (Bacillus cereus); the Pseudomonas bacteria comprise Pseudomonas fluorescens (Pseudomonas fluorescens); the enterobacteria include Escherichia coli (Escherichia coli).

In a particular embodiment, the starting strain of the transgenic microorganism of the present application (i.e.the microorganism prior to the transfer into the nucleotide sequence described in the second application) is a wild-type microorganism and/or a genetically engineered microorganism.

Wherein, the wild microorganism refers to a microorganism which is separated from the nature and is not artificially modified.

Genetically engineered microorganisms refer to microorganisms artificially modified from wild microorganisms.

The species of the transgenic microorganism and/or genetically engineered microorganism of the present application is not changed by the transgenic modification, and therefore, the transgenic microorganism is the same species as the microorganism before the transgene occurs (i.e., as a recipient microorganism).

In one embodiment, the nucleic acid sequence described in the second application above can be linked to an expression vector. The expression vector may be, for example, a pSTK expression vector capable of shuttling in E.coli and B.thuringiensis.

The fifth aspect of the present application provides the use of a nucleotide sequence according to the second aspect of the present application for the preparation of a transgenic plant, wherein said transgenic plant is capable of producing an insecticidal protein according to the first aspect of the present application; the transgenic plant comprises at least one of Cruciferae (Cruciferae), Papilionaceae (Papilionoceae), Chenopodiaceae (Chenopodiaceae) and Compositae (Comositea).

In a particular embodiment, it is preferred that the transgenic plant comprises at least one of Brassica (Brassica), Raphanus (Raphanus), Medicago (Medicago), Beta (Beta), and Lactuca (L actuca).

In a specific example, it is preferable that the transgenic plant includes at least one of rape (Brassica campestris), chinese cabbage (Brassica rapa), chinese cabbage (Brassica chinensis), cabbage (Brassica oleracea), radish (Raphanus sativus), alfalfa (Medicago sativa), beet (Beta vulgaris) and lettuce (L actaspativa).

The species of the transgenic plant is not changed by the transgenic modification, and therefore, the transgenic plant is the same species as the plant before the transgene occurs (i.e., as a recipient plant).

The sixth aspect of the present application provides a method for producing an insecticidal protein according to one of the first to the third aspects of the present application, comprising producing said insecticidal protein using a transgenic microorganism according to the fourth aspect of the present application, and/or using a transgenic plant according to the fifth aspect of the present application.

In a specific embodiment, it is preferable that the method further comprises purifying the insecticidal protein to a purity of 80% or more after producing the insecticidal protein using the transgenic microorganism and/or transgenic plant.

In a specific embodiment, it is more preferable that after the production of the insecticidal protein using the transgenic microorganism and/or transgenic plant, the insecticidal protein is purified to have a purity of 90% or more.

In a specific embodiment, the insecticidal protein is purified to a purity of 99% or more even after production of the insecticidal protein using the transgenic microorganism and/or transgenic plant.

Accordingly, the seventh aspect of the present application provides the use of at least one of the pesticidal proteins according to one of the applications, the compositions according to the third aspect of the present application, the transgenic microorganisms according to the fourth aspect of the present application, and the transgenic plants in the use according to the fifth aspect of the present application for controlling at least one pest of the Coleoptera (Coleoptera).

In a particular embodiment, preference is given to the use of at least one of the insecticidal proteins according to one of the applications, the compositions according to the third of the applications, the transgenic microorganisms according to the fourth of the applications, and the transgenic plants for use according to the fifth of the applications for controlling at least one pest in the family phylloplasmaceae (Chrysomelidae).

In a particular embodiment, particular preference is given to the use of at least one of the insecticidal proteins according to one of the applications, the compositions according to the third of the applications, the transgenic microorganisms according to the fourth of the applications, and the transgenic plants for use according to the fifth of the applications for controlling at least one pest in the genus simian beetle (collahellus).

In a specific embodiment, the use of at least one of the insecticidal proteins according to one of the present applications, the compositions according to the third of the present applications, the transgenic microorganisms according to the fourth of the present applications, and the transgenic plants for use according to the fifth of the present applications for controlling a macaca apectii (collahellus bowring) is most preferred.

The technology for preparing monoclonal antibodies is mature, so that the monoclonal antibodies of the insecticidal proteins can be prepared according to the conventional technical means in the prior art. In the process of preparing the monoclonal antibody, the selected antigen can be a full-length sequence of the insecticidal protein in one of the applications, and also can be a partial amino acid sequence of the insecticidal protein in one of the applications. The pure product of the antigen can be obtained by the method for preparing the insecticidal protein provided by the sixth application; the antigen, particularly when it is a partial amino acid sequence, can also be obtained by artificial synthesis. Accordingly, eight of the present applications provide monoclonal antibodies to pesticidal proteins according to one of the present applications. Preferably, the monoclonal antibody is a monoclonal antibody that specifically recognizes only the pesticidal protein.

Unless otherwise indicated herein, all terms used herein are to be understood as being generic to all terms used in the art.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are provided by way of illustration of preferred embodiments and are not to be construed as limiting the present invention.

1) Liquid L B, tryptone 1%, yeast powder 0.5%, NaCl 1%, pH7.0, 15 pounds sterilized for 15 min.

2) Solid L B1.3% agar was added to liquid L B medium and 15 lbs sterilized for 15 min.

3) Antibiotics: ampicillin aqueous solution 100mg/ml, diluted 500 times when using and preserved at-20 ℃. Among them, pET21b plasmid vector has ampicillin resistance.

Electrophoretic detection of proteins

120V pre-electrophoresis for about 10-20min, taking a protein sample of 40 mu L, adding 10 mu L5 × sample adding buffer solution, mixing uniformly, diluting the supernatant and the precipitate in a gradient manner respectively, boiling for 5-10min, centrifuging at 12000rpm for 5min, taking 10L supernatant, sampling, carrying out constant voltage electrophoresis at 80V until the sample is concentrated to be a straight line, and carrying out constant voltage electrophoresis at 150V until the indicated bromophenol blue reaches the bottom of the gel.

And (3) decoloring, namely taking out the gel after electrophoresis, washing the gel with distilled water, adding 50m of L solution I, heating the gel in a microwave oven for 30s, and oscillating the gel at 60rpm for 10 min.

And (3) dyeing, pouring out the solution I, adding the solution II (adding 200L solution III per 50m of solution II of L) and heating in a microwave oven for 30s, and oscillating at 60rpm for more than 15 min.

The solution II was decanted, sterile water was added and the gel imaging system was stored photographically.

The observation result shows that the expression of the target protein is compared according to the coloring degree of the protein band, and the target protein is stored by photographing with a gel imaging system.

Table 1 shows the preparation of SDS polyacrylamide gels.

TABLE 1 preparation of SDS Polyacrylamide gels

EXAMPLE 1 screening and cloning of novel genes

Bt genome extraction

S1, 5M L1M Tris-HC L, 1M L0.5.5M EDTA, 171.15g sucrose, pH7.0, constant volume to 500M L, and sterilizing at 115 ℃ for 20 min.

S2：10％SDS 4mL+ddH₂O 6mL，pH4.8-5.2。

S3: 5M guanidinium isothiocyanate, 1M NaAc.

TE 10mM Tris-HC L3 m L, 1mM EDTA 600ul, pH8.0, constant volume to 300m L.

1) Inoculating Bacillus thuringiensis 4CE1 strain on L B culture medium, and culturing at 30 deg.C overnight;

2) scrape all the cells on the plate as much as possible into a 1.5ml EP tube, and suspend them thoroughly with 150. mu. l S1;

3) adding 100mg of quartz sand, and crushing for 1 minute on a tissue crusher;

4) adding 200 mu l S2, and fully and uniformly mixing;

5) adding 400 mu l S3, fully mixing, and centrifuging at 12000rpm for 10 minutes;

6) transferring the supernatant of the uppermost layer into a 1.5EP tube, adding isopropanol with the same volume, uniformly mixing, and standing for 20 minutes at-20 ℃;

7) centrifuging at 12000rpm for 10min, and discarding the supernatant;

8) washing the precipitate with 70% anhydrous ethanol, and air drying at room temperature;

9) adding 100 mul TE solution to dissolve the precipitate;

10) the extracted genome is checked for quality and concentration by 0.7% agarose gel electrophoresis, and stored at-20 ℃ for later use.

PCR amplification is carried out by taking 4CE1sip _ F1: ATGTGTGTATCTGCCCCTGGTAGTGT (SEQ ID No.3) and 4CE1sip _ R: ATTGAAACTTCTTGTCGCCACTAATT (SEQ ID No.4) as primers and 4CE1 strain genome as PCR template, amplification cycle is carried out by taking 94 ℃ pre-denaturation 10min, 94 ℃ denaturation 1min, 50 ℃ annealing 1min, 72 ℃ extension, 30 cycles and finally 72 ℃ extension 10min, PCR product is detected by 1% agarose gel electrophoresis, PCR product recovery is carried out according to the operation instruction of Axygen's DNA recovery Kit, and is connected to pMD-19T cloning vector, DH5 α competent cell is transformed to obtain recombinant cloning vector, which is named pMD-4CE1sip, 4CE1sip _ F2: CACCATGTGTGTATCTGCCCCTGGTAGTGT (SEQ ID No.5), 4CE1sip _ R: ATTGAAACTT CTTGT CGCCACTAATT (SEQ ID No.4) as primer, pMD-4CE1sip is used as PCR template, gold mMix _ R <1 > min (SEQ ID No.5) is used as PCR template, PCR amplification reagent Kit, PCR amplification is carried out by taking 4CE1 sip-4 sPCR amplification, PCR amplification Kit, PCR product recovery is carried out by taking the PCR amplification reaction Kit of PCR product recovery 5, and amplification reaction is carried out by taking pDE 1 sPDE gel electrophoresis under the operation instruction of PCR technology of PdE 1-19T recovery 5, PCR amplification technology, pDE 1 PCR product recovery 5, PCR amplification technology, PCR product recovery 5 is carried out according to obtain pDE PCR technology, PCR amplification technology, PCR product recovery 5, PCR technology, PCR product recovery 5, PCR amplification technology, PCR.

Through sequencing analysis, the length of the 4CE1sip (SEQ ID No.1) gene is 912bp, the coded protein is 4CE1sip, 304 amino acids (SEQ ID No.2) are totally used, and the 33kDa protein is expressed.

The pDE2-4CE1sip recombinant plasmid was then extracted and transformed into the expression strain Rosetta (DE 3). IPTG-induced expression of the 4CE1sip in Escherichia coli Rosetta (DE3), and SDS-PAGE electrophoresis results show that the 4CE1sip gene is expressed in both soluble components and insoluble components; in which approximately 33kDa or so protein is expressed, consistent with the expected results. The negative control, i.e.E.coli Rosetta (DE3) which did not contain the 4CE1sip gene but contained the pET-21b vector, had no bands for expression of the corresponding proteins in both the soluble and insoluble fractions.

Example 2

Expression and quantitative analysis of proteins

Escherichia coli Rosetta (DE3) strain carrying 4CE1sip gene was inoculated in L B liquid medium at an inoculum size of 1%, and cultured at 37 ℃ to OD₆₀₀When the value reaches between 0.5 and 1.0, adding an inducer 50mM IPTG, inducing at the low temperature of 150rpm and 20 ℃ for 12h, then centrifuging at the temperature of 4 ℃ and 8000rpm for 3min, collecting thalli by centrifugation, adding 50mM Tris & Cl (pH8.0) for suspension, crushing the thalli (completely crushing by using ultrasonic waves conventionally), centrifuging the ultrasonically crushed bacteria liquid at the temperature of 4 ℃ and 12,000rpm for 15min, then collecting supernatant, and carrying out SDS-PAGE quantitative analysis on the supernatant according to a method that 5 BSA with different concentration gradients of 0.8 mu g/mu L, 0.4 mu g/mu L, 0.2 mu g/mu L, 0.1 mu g/mu L and 0.05 mu g/mu L are prepared, the target Protein is subjected to gradient dilution so that the final concentration is between 0.8 and 0.05 mu g/mu L, the target Protein and 5 BSA with different concentrations (Protein quantification kit: DC Protein) are obtained by performing gradient dilution so that the concentration of the target Protein is in a SDS sample concentration of 0.8-0.05 mu g/mu L, and the target Protein is determined by using a SDS-PAGE standard Protein concentration (Protein concentration), namely SDS-10) detection method, and the concentration of a Protein binding standard Protein concentration detection method is obtained by taking a VDS.S.S.S.S.S.S.S.S.S.S.S.S.S.S.S.S.S. detection.

Comparative example 1

The expression product of cry3Aa7(SEQ ID No.5) gene cloned into pET21b under the same conditions in Escherichia coli Rosetta (DE3)) was used as a positive control for the assay of biological activity. The expression and quantitative analysis of the Cry3Aa7(SEQ ID No.6) protein are the same as those in example 2.

Example 3

Activity assay

The great ape beetle (Collphelus bowringii) is provided by the Biotechnology group of the institute of plant protection, academy of agricultural sciences, China.

The operation steps of the biological activity determination of the pests are as follows:

(1) selecting fresh and consistent leaves, cleaning the leaves with clear water, airing the leaves, and shearing the leaves into a disposable plate (the diameter is 6 cm);

(2) soaking the leaves in the prepared serial diluted supernatant (added with detergent, the final concentration is 0.1%) for 30 s;

(3) laying a layer of preservative film on a laboratory table, placing the leaves dipped with the sample on the preservative film, and airing at room temperature;

(4) placing the leaves in a culture dish, respectively, and filling a filter paper (the filter paper needs to be packaged and sterilized by tinfoil paper) wetted by sterile water into the culture dish (the diameter is 9 cm);

(5) lightly inoculating the newly hatched larvae with a brush pen, inoculating 30 heads of the larvae to each blade to be used as one treatment, repeating the treatment for three times, strictly sealing the larvae with 2 layers of absorbent paper after the larvae are inoculated, and fixing the larvae with rubber bands to prevent the larvae from climbing out;

(6) placing in a biochemical incubator at 25 ℃, wherein the photoperiod is 16 h: observing whether the leaves are rotten or dried up or not and whether water vapor is condensed or not every day, adjusting the water in a biochemical incubator, and keeping the humidity in the incubator after 8 hours and the humidity is about 50%;

(7) after 48h, the number of dead and live insects for each treatment was investigated and the mortality, survival, corrected mortality and L C were calculated₅₀。

Wherein the test insects are subjected to L C₅₀Before measurement, firstly, the concentration range of the insecticidal is preliminarily determined by the above biological activity measurement method through primary screening, then the insecticidal activity under a series of concentration gradients is measured, and L C is calculated₅₀. Mortality and corrected mortality at a particular concentration are calculated as follows:

the lethal middle concentration (L C) was calculated from the bioassay data using SPSS (V13.0) software₅₀). The results are shown in Table 2.

TABLE 2

As can be seen from the results of table 2, the activity of the 4CE1sip insecticidal protein of the present application against simian beetles is significantly superior to the known Cry-class insecticidal protein Cry3Aa 7. The 4CE1sip insecticidal protein is used for preventing and treating the great ape beetle, not only provides a novel insecticidal protein, but also can obviously reduce the production cost, thereby bringing more considerable economic benefit.

While the present invention has been described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes may be made without departing from the true spirit and scope of the invention. For example, many modifications may be made to adapt a particular situation, material, composition of matter, or method step to the teachings of the invention. All such modifications are intended to be included within the scope of the present invention as defined in the appended claims. Moreover, the technical content disclosed above is subject to some variations or modifications, which are equivalent to the equivalent embodiments, and all fall within the scope of the technical solution.

L HA1760148 nucleotide and amino acid sequence Table

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<120> a novel insecticidal protein and nucleotide sequence thereof

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ATGTGTGTATCTGCCCCTGGTAGTGTATTAGCAGCAGAAAATCCCCCAACTAGTGTTAATGAAAATGTAAGAGTTGGTATTACGGATGTCAAATCTGAATTAAAAAAAATAGGTGAGTACTATTATGCTAATGAAATAGCAGGTACAGAAATTAAGGTAGGTCCTTTAAATTATTTAACATTTGAAAGAACGCCAAGAAGTGTTGAAACAAAAGTTAACTTCGGTATTACAGCTACTGCAAATGAATTGAAATATGATAGTTCCATCGTTGAATACATTGGAGAAAATATATTTACGAACAATTCAGATGTAACCCAAAAGTTCTCAACAGCTAAATATAATAAAACTGTAACAGAATCAATAACAACATCGACAACAAAGGGTTTTAAAGTGGGTGGTTCAGGTGACGGTAGTAACATATTTACCATTCCATTGCTATTAAATAATGGTATGAAAGTAAATGCAGAATTCAACTCTTCTACTACAGAGTCAAAAACAAAATCCGAATCAAGAGGAATAGAAGCATCTGCACAAACTGTAGAAGTTCCACCAAATAAAACATTTAAAGCAGAAGTTGTATTGGAACAAAGAAGTTTTTGGAGTGATGTTACACTTAACGGTGTAGGGAATGATCTTGAGACTACAATAGTTGCAAAGGCAGGAAAAGTGAATTCGGGCGAATCTTTAATTAAAGAATACACATTTAAAGATAAAACTGTAAATTACTGGAATAAACTAAGTGCTTCTCAAAAACTTAGTCTAAATGGAATCACATTTAATAATAATAATAATAGTGTAAATGTAAATGGGACAGCAAAAGTTGAAGGTATATTTGGTAGTGAGTTAAATGTGAAAATTTATGATATTACAGATAAATCAAATCCTAAATTAGTGGCGACAAGAAGTTTCAAT；

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ATGTGTGTATCTGCCCCTGGTAGTGT；

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ATTGAAACTTCTTGTCGCCACTAATT；

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CACCATGTGTGTATCTGCCCCTGGTAGTGT；

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ttcaatgccttcgtttgcaatttctggatacgaggttctatttctaacaacatatgcacaagctgccaacacacatttat

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ctaaaacttacgcaagaatatactgaccattgtgtcaaatggtataatgttggattagataaattaagaggttcatctta

tgaatcttgggtaaactttaaccgttatcgcagagagatgacattaacagtattagatttaattgcactatttccattgt

atgatgttcggctatacccaaaagaagttaaaaccgaattaacaagagacgttttaacagatccaattgtcggagtcaac

aaccttaggggctatggaacaaccttctctaatatagaaaattatattcgaaaaccacatctatttgactatctgcatag

aattcaatttcacacgcggttccaaccaggatattatggaaatgactctttcaattattggtccggtaattatgtttcaa

ctagaccaagcataggatcaaatgatataatcacatctccattctatggaaataaatccagtgaacctgtacaaaattta

gaatttaatggagaaaaagtctatagagccgtagcaaatacaaatcttgcggtctggccgtccgctgtatattcaggtgt

tacaaaagtggaatttagccaatataatgatcaaacagatgaagcaagtacacaaacgtacgactcaaaaagaaatgttg

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<211>652

<212>PRT

<213> Bacillus thuringiensis (Bacillus thuringiensis)

<223>Cry3Aa7

<400>7

MIRKGGRKMNPNNRSEHDTIKTTENNEVPTNHVQYPLAETPNPTLEDLNYKEFLRMTADNNTEALDSSTTKDVIQKGISVVGDLLGVVGFPFGGALVSFYTNFLNTIWPSEDPWKAFMEQVEALMDQKIADYAKNKALAELQGLQNNVEDYVSALSSWQKNPVSSRNPHSQGRIRELFSQAESHFRNSMPSFAISGYEVLFLTTYAQAANTHLFLLKDAQIYGEEWGYEKEDIAEFYKRQLKLTQEYTDHCVKWYNVGLDKLRGSSYESWVNFNRYRREMTLTVLDLIALFPLYDVRLYPKEVKTELTRDVLTDPIVGVNNLRGYGTTFSNIENYIRKPHLFDYLHRIQFHTRFQPGYYGNDSFNYWSGNYVSTRPSIGSNDIITSPFYGNKSSEPVQNLEFNGEKVYRAVANTNLAVWPSAVYSGVTKVEFSQYNDQTDEASTQTYDSKRNVGAVSWDSIDQLPPETTDEPLEKGYSHQLNYVMCFLMQGSRGTIPVLTWTHKSVDFFNMIDSKKITQLPLVKAYKLQSGASVVAGPRFTGGDIIQCTENGSAATIYVTPDVSYSQKYRARIHYASTSQITFTLSLDGAPFNQYYFDKTINKGDTLTYNSFNLASFSTPFELSGNNLQIGVTGLSAGDKVYIDKIEFIPVN。

Claims

1. An insecticidal protein, the amino acid sequence of which is shown in SEQ ID No. 2.

2. A nucleic acid encoding the pesticidal protein of claim 1.

3. The nucleic acid according to claim 2, wherein the sequence of the nucleic acid is represented by SEQ ID number 1.

4. A composition comprising the pesticidal protein of claim 1.

5. The composition of claim 4, further comprising a nucleic acid encoding the pesticidal protein, wherein the nucleic acid has a sequence as set forth in SEQ ID number 1.

6. A transgenic microorganism comprising the nucleic acid of claim 2 or 3 and capable of producing the pesticidal protein of claim 1.

7. The transgenic microorganism according to claim 6, wherein the transgenic microorganism is at least one of Bacillus (Bacillus), Pseudomonas (Pseudomonas), Enterobacter (Escherichia), and Yeast (Saccharomyces).

8. The transgenic microorganism according to claim 7, wherein the Bacillus is at least one of Bacillus thuringiensis (Bacillus thuringiensis), Bacillus subtilis (Bacillus subtilis), Bacillus atrophaeus (Bacillus atrophaeus) and Bacillus cereus (Bacillus cereus); the Pseudomonas is Pseudomonas fluorescens (Pseudomonas fluorescens); the enterobacteria are Escherichia coli (Escherichia coli).

9. A method of preparing the pesticidal protein of claim 1, comprising using the transgenic microorganism of any one of claims 6 to 8 to produce the pesticidal protein.

10. The method of claim 9, further comprising purifying the pesticidal protein to a purity of 80% or greater after producing the pesticidal protein using the transgenic microorganism.

11. The method of claim 10, wherein the insecticidal protein is more than 90% pure.

12. The method of claim 11, wherein the insecticidal protein is more than 99% pure.

13. The insecticidal protein according to claim 1, the composition according to claim 4 or 5, the use of at least one of the transgenic microorganisms according to any one of claims 6 to 8 for combating at least one pest of the order Coleoptera (Coleoptera).

14. Use according to claim 13, for controlling at least one pest of the family phylloplasmaceae (Chrysomelidae).

15. The use as claimed in claim 14 for the control of simian beetlesColaphellus) At least one pest.

16. The use as claimed in claim 15 for the control of bulleyana: (dahlia apentae)Colaphellus bowring) The use of (1).