CN107022009B - 一种新的杀虫蛋白及其核苷酸序列 - Google Patents
一种新的杀虫蛋白及其核苷酸序列 Download PDFInfo
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- CN107022009B CN107022009B CN201710219911.7A CN201710219911A CN107022009B CN 107022009 B CN107022009 B CN 107022009B CN 201710219911 A CN201710219911 A CN 201710219911A CN 107022009 B CN107022009 B CN 107022009B
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- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
- C07K14/32—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria from Bacillus (G)
- C07K14/325—Bacillus thuringiensis crystal peptides, i.e. delta-endotoxins
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- A—HUMAN NECESSITIES
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- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
- A01N47/42—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=CX2 groups, e.g. isothiourea
- A01N47/44—Guanidine; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/12—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from bacteria
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- C07K16/1278—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from bacteria from Gram-positive bacteria from Bacillus (G)
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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
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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
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- 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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- Life Sciences & Earth Sciences (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Gastroenterology & Hepatology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Peptides Or Proteins (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
本发明涉及一种新的杀虫蛋白及其核苷酸序列。杀虫蛋白具有如(I)和(II)中的至少一种的氨基酸序列:(I)SEQ ID No.2所示的氨基酸序列;(II)与如SEQ ID No.2所示的氨基酸序列的一致性在95%以上,且与如SEQ ID No.2所示的氨基酸序列具有相同功能的氨基酸序列;优选其氨基酸序列为与如SEQ ID No.2所示的氨基酸序列的一致性在98%以上,且与如SEQ ID No.2所示的氨基酸序列具有相同功能的氨基酸序列。
Description
技术领域
本发明涉及一种新的杀虫蛋白及其核苷酸序列。
背景技术
苏云金芽胞杆菌(Bacillus thuringiensis,简称Bt)是一种分布广泛的革兰氏阳性细菌,是一种对害虫毒力强且对天敌无毒性的昆虫病原微生物,对高等动物和人无毒性。它是目前研究最为深入、使用最为广泛的微生物杀虫剂,对16个目3000多种害虫有活性。
现有技术主要认为Bt之所以能够具有杀虫活性,主要是由于其体能能够产生各种Cry蛋白、Cyt蛋白和Vip蛋白。
然而,鲜有报道Bt还能够产生不同于以上三种蛋白的杀虫活性物质,特别是对某些鞘翅目(Coleoptera)害虫,例如华北大黑鳃金龟(Holotrichia oblita)具有优良活性的杀虫活性物质。
发明内容
本申请之一提供了一种杀虫蛋白,其具有如(I)和(II)中的至少一种的氨基酸序列:
(I)SEQ ID No.2所示的氨基酸序列;
(II)与如SEQ ID No.2所示的氨基酸序列的一致性在95%以上,且与如SEQ IDNo.2所示的氨基酸序列具有相同功能的氨基酸序列。
通过(II)限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列具有相同功能的同时,可以获得具有与如SEQ ID No.2所示的氨基酸序列相当或者更优的效果,这将在本申请的保护范围之内。不过在不影响使用所述杀虫蛋白的情况下,通过(II)限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列获得具有相同功能的同时,获得比如SEQ ID No.2所示的氨基酸序列稍差的效果,例如其效果是SEQ ID No.2所示的氨基酸序列的效果的50%-99.999%时,也在本申请的保护范围之内。
在一个具体实施例中,优选杀虫蛋白的氨基酸序列为与如SEQ ID No.2所示的氨基酸序列的一致性在98%以上,且与如SEQ ID No.2所示的氨基酸序列具有相同功能的氨基酸序列。通过这种方式限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列具有相同功能的同时,可以获得具有与如SEQ ID No.2所示的氨基酸序列相当或者更优的效果,这将在本申请的保护范围之内。不过在不影响使用所述杀虫蛋白的情况下,通过(II)限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列获得具有相同功能的同时,获得比如SEQ IDNo.2所示的氨基酸序列稍差的效果,例如其效果是SEQ ID No.2所示的氨基酸序列的效果的50%-99.999%时,也在本申请的保护范围之内。
在一个具体实施例中,优选杀虫蛋白的氨基酸序列为与如SEQ ID No.2所示的氨基酸序列的一致性在99%以上,且与如SEQ ID No.2所示的氨基酸序列具有相同功能的氨基酸序列。通过这种方式限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列具有相同功能的同时,可以获得具有与如SEQ ID No.2所示的氨基酸序列相当或者更优的效果,这将在本申请的保护范围之内。不过在不影响使用所述杀虫蛋白的情况下,通过(II)限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列获得具有相同功能的同时,获得比如SEQ IDNo.2所示的氨基酸序列稍差的效果,例如其效果是SEQ ID No.2所示的氨基酸序列的效果的50%-99.999%时,也在本申请的保护范围之内。
在一个具体实施例中,优选杀虫蛋白的氨基酸序列为与如SEQ ID No.2所示的氨基酸序列的一致性在99.5%以上,且与如SEQ ID No.2所示的氨基酸序列具有相同功能的氨基酸序列。通过这种方式限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列具有相同功能的同时,可以获得具有与如SEQ ID No.2所示的氨基酸序列相当或者更优的效果,这将在本申请的保护范围之内。不过在不影响使用所述杀虫蛋白的情况下,通过(II)限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列获得具有相同功能的同时,获得比如SEQID No.2所示的氨基酸序列稍差的效果,例如其效果是SEQ ID No.2所示的氨基酸序列的效果的50%-99.999%时,也在本申请的保护范围之内。
在一个具体实施例中,所述杀虫蛋白还可以为如(I)的氨基酸序列经过取代和/或缺失和/或添加一个或多个氨基酸后,与具有如(I)的氨基酸序列的杀虫蛋白具有相同功能的蛋白。通过这种方式限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列具有相同功能的同时,可以获得具有与如SEQ ID No.2所示的氨基酸序列相当或者更优的效果,这将在本申请的保护范围之内。不过在不影响使用所述杀虫蛋白的情况下,通过(II)限定的杀虫蛋白在与如SEQ ID No.2所示的氨基酸序列获得具有相同功能的同时,获得比如SEQ IDNo.2所示的氨基酸序列稍差的效果,例如其效果是SEQ ID No.2所示的氨基酸序列的效果的50%-99.999%时,也在本申请的保护范围之内。
本申请的杀虫蛋白对害虫的杀虫活性,特别是对华北大黑鳃金龟的杀虫活性显著优于现有技术中的杀虫蛋白的杀虫活性,其可以弥补例如Cry8G蛋白在对华北大黑鳃金龟(Holotrichia oblita)杀虫活性较弱的不足。因此,其丰富了杀虫蛋白资源,为转基因作物与工程菌株提供新的基因来源,提高Bt转基因产品的抗虫效果,具有重要的经济、社会和生态效益。
本申请之二提供了一种核苷酸序列,所述核苷酸序列为编码如本申请之一所述的杀虫蛋白中任意一种的核苷酸序列。该核苷酸序列可以以其来源菌株为模板,或以克隆的全长DNA片段为模板,通过PCR扩增得到;也可以根据给定的序列人工合成。
在一个具体的实施例中,当所述杀虫蛋白的氨基酸序列如SEQ ID No.2所示时,编码所述杀虫蛋白的所述核苷酸序列如SEQ ID No.1所示。
本申请之三提供了一种组合物,其包括如本申请之一所述杀虫蛋白的至少一种。
在一个具体的实施例中,当所述杀虫蛋白的氨基酸序列如SEQ ID No.2所示时,编码所述杀虫蛋白的核苷酸序列如SEQ ID No.1所示。
本申请之四提供了一种含有本申请之二所述的核苷酸序列,且能产生本申请之一相应的所述的杀虫蛋白的转基因微生物。
在一个具体的实施例中,优选所述转基因微生物包括芽胞杆菌(Bacillus)、假单胞菌(Pseudomonas)、肠杆菌(Escherichia)和酵母(Saccharomyces)中的至少一种。
在一个具体的实施例中,优选所述芽胞杆菌包括苏云金芽胞杆菌(Bacillusthuringiensis)、枯草芽胞杆菌(Bacillus subtilis)、萎缩芽胞杆菌(Bacillusatrophaeus)和蜡样芽胞杆菌(Bacillus cereus)中的至少一种;所述假单胞菌包括荧光假单胞杆菌(Pseudomonas fluorescens);所述肠杆菌包括大肠杆菌(Escherichia coli)。
在一个具体实施例中,本申请的转基因微生物的出发株(即在转入本申请之二所述的核苷酸序列之前的微生物)为野生微生物和/或遗传工程微生物。
其中,野生微生物是指从自然界中分离出的未经过人工改造的微生物。
遗传工程微生物是指将野生微生物人工改造的微生物。
本申请的转基因微生物和/或遗传工程微生物的物种并不因进行了转基因修饰而改变,因此,转基因微生物与发生转基因之前的微生物(即作为受体微生物)为相同的物种。
在一个具体实施例中,如上的本申请二的所述的核酸序列能够被连接在表达载体上。所述表达载体例如可以是能够在大肠杆菌和苏云金芽胞杆菌中穿梭的pSTK表达载体。
本申请之五提供了根据本申请之二所述的核苷酸序列在制备转基因植物中的应用,其中,所述转基因植物能够产生如本申请之一所述的杀虫蛋白;所述转基因植物包括十字花科(Cruciferae)、茄科(Solanaceae)、伞形科(Umbelliferae)、葫芦科(Cucurbitaceae)、天南星科(Araceae)、禾本科(Liliaceae)、豆科(Leguminosae)、蝶形花科(Papilionaceae)、藜科(Chenopodiaceae)菊科(Compositae)、和锦葵科(Malvaceae)中的至少一种。
在一个具体的实施例中,优选所述转基因植物包括芸薹属(Brassica)、萝卜属(Raphanus)、烟草属(Nicotiana)、蕃茄属(Lycopersicon)、茄属(Solanum)、辣椒属(Capsicum)、胡萝卜属(Daucus)、芹属(Apium)、欧芹属(Petroselinum)、茴香属(Foeniculum)、南瓜属(Cucurbita)、黄瓜属(Cucumis)、冬瓜属(Benincasa)、丝瓜属(Luffa)、西瓜属(Citrullus)、甜瓜属(Cucumis)、磨芋属(Amorphophallus)蜀黍属(Zea)、高梁属(Sorghum)、狗尾巴草属(Setaria)、稻属(Oryza)、甘蔗属(Saccharum)、小麦属(Triticum)、大豆属(Glycine)、苜蓿属(Medicago)、甜菜属(Beta)、莴苣属(Lactuca)、向日葵属(Helianthus)和秋葵属(Abelmoschus esculentus)中的至少一种。
在一个具体的实施例中,优选所述转基因植物包括油菜(Brassica campestris)、大白菜(Brassica rapa)、小白菜(Brassica chinensis)、甘蓝(Brassica oleracea)、萝卜(Raphanus sativus)、番茄(Lycopersicon esculentum)、马铃薯(Solanum tuberosum)、茄子(Solanum melongena)、旱芹(Apium graveolens)、欧芹(Petroselinum crispum)、小茴香(Foeniculum vulgare)、西葫芦(Cucurbita pepo)、南瓜(Cucurbita moschata)、黄瓜(Cucumis sativus)、冬瓜(Benincasa hispida)、丝瓜(Luffa acutangula)、西瓜(Citrullus lanatus)、甜瓜(Cucumis melo)、磨芋(Amorphophallus rivieri)、玉米(Zeamays)、高粱(Sorghum bicolor)、谷子(Setaria italica)、水稻(Oryza sativa)、甘蔗(Saccharum officinarum)、小麦(Triticum aestivum)、大豆(Glycine max)、苜蓿(Medicago sativa)、甜菜(Beta vulgaris)、莴苣(Lactuca sativa)、向日葵(Helianthusannuus)和秋葵(Abelmoschus esculentus)中的至少一种。
转基因植物的物种并不因进行了转基因修饰而改变,因此,转基因植物与发生转基因之前的植物(即作为受体植物)为相同的物种。
本申请之六提供了一种制备如本申请之一所述的杀虫蛋白的方法,其包括利用本申请之四所述的转基因微生物,和/或利用本申请之五所述的应用中的转基因植物来生产所述杀虫蛋白。
在一个具体的实施例中,优选还包括在利用所述转基因微生物和/或转基因植物生产所述杀虫蛋白后,纯化所述杀虫蛋白使所述杀虫蛋白的纯度达到80%以上。
在一个具体的实施例中,更优选在利用所述转基因微生物和/或转基因植物生产所述杀虫蛋白后,纯化所述杀虫蛋白使所述杀虫蛋白的纯度达到90%以上。
在一个具体的实施例中,甚至是在利用所述转基因微生物和/或转基因植物生产所述杀虫蛋白后,纯化所述杀虫蛋白使所述杀虫蛋白的纯度达到99%以上。
因此,本申请之七提供了根据本申请之一所述的杀虫蛋白,本申请之三所述的组合物,本申请之四所述的转基因微生物,以及本申请之五所述的应用中的转基因植物中的至少一种在防治鞘翅目(Coleoptera)中的至少一种害虫中的应用。
在一个具体的实施例中,优选根据本申请之一所述的杀虫蛋白,本申请之三所述的组合物,本申请之四所述的转基因微生物,以及本申请之五所述的应用中的转基因植物中的至少一种在防治鳃金龟科(Melolonthidae)中的至少一种害虫中的应用。
在一个具体的实施例中,特别优选根据本申请之一所述的杀虫蛋白,本申请之三所述的组合物,本申请之四所述的转基因微生物,以及本申请之五所述的应用中的转基因植物中的至少一种在防治鳃金龟属(Holotrichia)中的至少一种害虫中的应用。
在一个具体的实施例中,最优选根据本申请之一所述的杀虫蛋白,本申请之三所述的组合物,本申请之四所述的转基因微生物,以及本申请之五所述的应用中的转基因植物中的至少一种在防治华北大黑鳃金龟(Holotrichia oblita)中的应用。
单克隆抗体的制备技术已经较为成熟,因此,根据现有技术的常规技术手段,可以制得本申请之一所述的杀虫蛋白的单克隆抗体。在制备单克隆抗体过程中,选用的抗原可以是本申请之一所述的杀虫蛋白的全长序列,也可以是本申请之一所述的杀虫蛋白的部分氨基酸序列。所述抗原的纯品可以通过本申请之六提供的制备如本申请之一所述的杀虫蛋白的方法来获得;所述抗原,特别是当其为部分氨基酸序列时,也可以通过人工合成的方式获得。因此,本申请之八提供了根据本申请之一所述的杀虫蛋白的单克隆抗体。优选所述单克隆抗体为仅特异识别所述杀虫蛋白的单克隆抗体。
在本申请中没有特殊说明的情况下,本申请中的术语均属于现有技术中所指的通用术语。
具体实施方式
以下通过优选的实施例的形式对本发明的上述内容再作进一步的详细说明,但不构成对本发明的限制。
1)液体LB:胰蛋白胨1%,酵母粉0.5%,NaCl 1%,pH 7.0,15磅灭菌15min。用于培养大肠杆菌。
2)固体LB:在液体LB培养基中加1.3%琼脂,15磅灭菌15min。用于培养大肠杆菌。
3)抗生素:氨苄青霉素水溶液100mg/ml,用时稀释500倍-20℃保存。其中pET21b质粒载体具有氨苄青霉素抗性。
蛋白电泳检测
120V预电泳约10-20min,取蛋白样品40μL,加入10μL 5×加样缓冲液,混匀,再将上清和沉淀分别梯度稀释,煮沸5-10min,12000rpm离心5min,取10L上清点样。80V恒压电泳至样品浓缩呈直线,150V恒压电泳至指示的溴酚蓝到达凝胶底部。
脱色:电泳后取出凝胶,电泳后取出凝胶并用蒸馏水冲洗,加入50mL溶液I,微波炉中加热30s,60rpm振荡10min。
染色:倒掉溶液I后加入溶液II(每50mL溶液II加200L溶液III)微波炉加热30s,60rpm振荡15min以上。
倒掉溶液II,加入无菌水,凝胶成像系统照相保存。
观察结果,根据蛋白条带着色程度比较目的蛋白表达情况,用凝胶成像系统照相保存。
表1为SDS聚丙烯酰氨凝胶的制备表。
表1 SDS聚丙烯酰氨凝胶的制备表
实施例1新基因的筛选及克隆
Bt基因组提取
S1:5mL 1M Tris-HCL,1mL 0.5M EDTA,171.15g蔗糖,pH7.0,定容至500mL,115℃20min灭菌。
S2:10%SDS 4mL+ddH2O 6mL,pH4.8-5.2。
S3:5M异硫氰酸胍,1M NaAc。
TE:10mM Tris-HCL 3mL,1mM EDTA 600ul,pH8.0,定容至300mL。
1)将苏云金芽胞杆菌261-1菌株划线接种于LB培养基上,30℃培养过夜;
2)尽可能刮取平板上全部菌体于1.5ml EP管中,用150μl S1充分悬浮;
3)加入100mg石英砂,组织破碎仪上破碎1分钟;
4)加入200μl S2,充分混匀;
5)加入400μl S3,充分混匀,12000rpm离心10分钟;
6)将最上层上清转移至1.5EP管中,加入等体积异丙醇,混匀后-20℃静置20分钟;
7)12000rpm离心10分钟,弃上清;
8)70%无水乙醇清洗沉淀,室温晾干;
9)加100μl TE溶液溶解沉淀;
10)0.7%的琼脂糖凝胶电泳检测提取的基因组质量和浓度,-20℃保存备用。
以261sip02_F(无缝BamH I)ATGACTGGTGGACAGCAAATGGGTCGGATGTTAACAAAGGAGATGTACT(SEQ ID No.3)和261sip02_R(无缝BamH I)TGTCGACGGAGCTCGAATTCGGATCAAAGGAATCATGGTTTTCAATCT(SEQ ID No.4)为引物,以261-1菌株基因组为PCR模板,进行PCR扩增。扩增循环:94℃预变性10min;94℃变性1min;62℃退火1min;72℃延伸;30个循环,最后72℃延伸10min,PCR产物用1%琼脂糖凝胶电泳检测。按照Axygen公司的DNA回收试剂盒的操作说明进行PCR产物回收。对pET-21b进行BamH I酶切后,与PCR纯化产物进行DNA片段连接。然后,取10μL连接产物,加至100μL DH5α感受态细胞中,冰浴30min;42℃热激90s,冰浴5min,加入800μL LB液体培养基,37℃培养1h;取200μL菌液涂于相应抗性(氨苄青霉素抗性)LB平板,37℃培养12-18h,筛选出含有阳性质粒的阳性转化子,其中阳性质粒被命名为pET-261sip02。
经测序分析,261sip02(SEQ ID No.1)基因长度1191bp,其编码蛋白为261sip02,共397个氨基酸(SEQ ID No.2),表达44.9kDa蛋白。
然后提取pET-261sip02重组质粒,并将其转化到表达菌株Rosetta(DE3)。将261sip02在大肠杆菌Rosetta(DE3)中进行IPTG诱导表达,SDS-PAGE电泳结果发现,261sip02基因在可溶组分和不可溶组分中均表达;其中表达约45kDa左右蛋白,与预期结果相符。阴性对照(即不含有261sip02基因,但含有pET-21b载体的大肠杆菌Rosetta(DE3))在可溶和不可溶性组分中都没有相应蛋白的表达条带。
实施例2
蛋白的表达与定量分析
将携带261sip02基因的大肠杆菌Rosetta(DE3)菌株以1%的接种量接种于LB液体培养基中,37℃培养至OD600值达到0.5-1.0之间时,加入诱导物50mM IPTG,在150rpm,20℃低温下诱导12h。然后在4℃下,8000rpm离心3min。离心收集菌体,加入50mM Tris·Cl(pH8.0)悬浮;破碎菌体(利用超声波常规完全破碎),将超声破碎后的菌液在4℃下12,000rpm离心15min;然后收集上清液。按照如下方法对所述上清液进行SDS-PAGE定量分析:制备以下5种不同浓度梯度的BSA:0.8μg/μL、0.4μg/μL、0.2μg/μL、0.1μg/μL、0.05μg/μL,并将目标蛋白进行梯度稀释,使其终浓度介于0.8-0.05μg/μL,目标蛋白和5种不同浓度的BSA(蛋白定量试剂盒:DC Protein Assay)上样量均为10μL,进行蛋白电泳检测。以牛血清蛋白(BSA)为标准蛋白制作蛋白浓度标准曲线,测定大肠杆菌Rosetta(DE3)重组菌株中总蛋白的浓度。结合ImageMaster VDS软件分析SDS-PAGE中目的蛋白所占比例,计算目的蛋白,即得到上清液中的261sip02的浓度。
对比例1
以克隆到pET21b上的cry8G(SEQ ID No.5)基因在大肠杆菌Rosetta(DE3))中相同条件下的表达产物为生物活性测定分析的阳性对照。Cry8G(SEQ ID No.6)蛋白的表达同实施例2。其中,该蛋白的表达产物主要分布于沉淀中,即主要以包涵体的形式存在,因此,在进行后续的生物活性测定时使用的沉淀产物。而在进行定量分析和后续的生物活性测定之前,首先要将包涵体进行常规溶解,后续定量分析同实施例2。
实施例3
活性分析
华北大黑鳃金龟(Holotrichia oblita)由沧州农林科学院植物保护研究所提供。
(1)将土豆切成细丝在阳光下晾晒至失水约60%-90%,同时将过筛后的土在阳光下暴晒2-3小时;
(2)将晾晒过的土豆丝在配制好的系列稀释的上清液(加入终浓度0.1%的洗涤剂)中浸泡30s;
(3)然后将土豆丝分装于六孔板中;
(4)按每100g土加18mL溶液的比例用浸泡过土豆丝的上清液拌土,并将拌好的土分装于六孔板中;
(5)将健康的5日龄华北大黑鳃金龟的幼虫接种于六孔板中,每孔接1头试虫,每30头作为一个处理,每个处理做三次重复,接完虫后严格密封,防止幼虫爬出;
(6)放置25℃生化培养箱中,光周期为16h:8h,湿度50%左右,每天观察土豆丝是否发霉(为的是避免土豆发霉),是否有水蒸气凝结(为的是避免含水量过高),并在调整生化培养箱内的水分,保持箱内湿度;
(7)7天后调查各个处理的死、活虫数,计算死亡率、存活率、校正死亡率和LC50。
其中,对试虫进行LC50测定之前,首先使用如上的生物活性测定方法经过初筛初步确定杀虫的浓度范围,然后再测定一系列的浓度梯度下的杀虫活性,进而计算出LC50。在某一特定浓度下的死亡率和校正死亡率计算公式如下:
根据生测数据采用SPSS(V13.0)软件计算致死中浓度(LC50)。其结果见表2。
表2
由表2的结果可知,本申请的261sip02杀虫蛋白对华北大黑鳃金龟的活性显著地优于已知的Cry类杀虫蛋白Cry8G。将本申请的261sip02杀虫蛋白用于防治华北大黑鳃金龟不但提供了一种新的杀虫蛋白,而且还可以显著地降低生产成本,从而带来更为可观的经济效益。
虽然本发明已经参照其优选地具体实施方式进行了描述,但是本领域的技术人员应该理解在没有脱离本发明的真正的精神和范围的情况下,可以进行的各种改变。例如,可以对本发明的主体、精神和范围进行多种改变以适应特定的情形、材料、材料组合物或方法步骤。所有的这些改变均包括在本发明的权利要求的范围内。并且利用上述揭示的技术内容做出些许的变动或修饰均等同于等效实施案例,均属于技术方案范围内。
LHA1760150 核 苷 酸 和 氨 基 酸 序 列 表
<110> 中国农业科学院植物保护研究所
<120> 一种新的杀虫蛋白及其核苷酸序列
<130> LHA1760150
<160> 6
<170> PatentIn version 3.5
<210> 1
<211> 1191
<212> DNA
<213>苏云金芽胞杆菌(Bacillus thuringiensis)
<223> 261sip02
<400> 1
ATGTTAACAAAGGAGATGTACTATATGTATTCCATTAAGAGATATAAAAAAGTAGCAATTGTAGCTCCAATTGTTTGTTTATTAGGAACAGGATTAACGTTTGTTACTAAACCGACACCGGCTGCAGCTGCAGTAACTACAAATTATGCTACAGCAAATTCTATGTCAGATTTTCAACCTATTAGTAAATATACTTTAGCGGGGGATCTATATGAACGATATCAGAGAATGATAATCGAACACCCTGATTTAGTTACTTCATCTGGTGTGAAACCACTAACGAAACAAAGTGATATAAAATATCAAGAAGAAGCATTCGCTGGGCTTGCTCAAGAAATAAGAGATCATAAGTTGGACAGAACTTTAGAGGATAATCCAGAATGGCTAAAGTTATTTGGAATGGATCCGTTTTTTAATTGGGTTCCTGAATATACCAATCTTTCTAATCAAAATGAAATTAAATTAGATAATCCAAGAGTGGATAATTATAAAGAAGATAACATTGAACTAGCTACTTATACTAATACTACATCATCAGAACAAACTTTTTTGACTCCTTCAAAAACAGAAAAAGTAACAGATTCTTTTACATATTCTAATTCAGAAGGTGGAAAATTAGGAGCTTCTGCTACGACGACAATTAGAGCGGGAATTCCTATAGCACAAGCTCAAGAAACTCTTACCTTGTCATTTGAAGCAACTTATAATCATACAAGTTCGAATACATCTTCCACTGAAAAAACAGTTACATATCCATCTCAATCACTAAAATGTTTACCAGGATATAAAACTTCTTTAATTGTAAAATTATCTCAGGCTAATTTTTCTGGTACAATGAGTTTTGAAGTTGAACCAACTGTAGATCAATTAATGGATGCTATAGAAAAAAATTGGAAATATAAGAATGAAAAATATAAAGAAAAAGGAGATTATACAATCCCAAATCGAAAAGAATTTTTATATAATTTATATAAGTATTCAAATTTACCAATTCCATCTTATGTTAAGTTAGATGACAAAGAGAAAACTGTATCATTTGGAAAAATTACATCTAAATATACAGGTGTAGCAGGTCATTTATCAGAAGCAAGTGCAACAGAAGTAAAATTGGAACCACTTAATAAAGCAAAGAAACCAATCATTATGCCTTTAAAACAATATCAACAAAAGATTGAAAACCATGATTCCTTT;
<210> 2
<211>397
<212> PRT
<213>苏云金芽胞杆菌(Bacillus thuringiensis)
<223> 261sip02
<400> 2
MLTKEMYYMYSIKRYKKVAIVAPIVCLLGTGLTFVTKPTPAAAAVTTNYATANSMSDFQPISKYTLAGDLYERYQRMIIEHPDLVTSSGVKPLTKQSDIKYQEEAFAGLAQEIRDHKLDRTLEDNPEWLKLFGMDPFFNWVPEYTNLSNQNEIKLDNPRVDNYKEDNIELATYTNTTSSEQTFLTPSKTEKVTDSFTYSNSEGGKLGASATTTIRAGIPIAQAQETLTLSFEATYNHTSSNTSSTEKTVTYPSQSLKCLPGYKTSLIVKLSQANFSGTMSFEVEPTVDQLMDAIEKNWKYKNEKYKEKGDYTIPNRKEFLYNLYKYSNLPIPSYVKLDDKEKTVSFGKITSKYTGVAGHLSEASATEVKLEPLNKAKKPIIMPLKQYQQKIENHDSF;
<210>3
<211> 49
<212> DNA
<213> 人工序列
<223> 261sip02_F
<400> 3
ATGACTGGTGGACAGCAAATGGGTCGGATGTTAACAAAGGAGATGTACT;
<210> 4
<211> 48
<212> DNA
<213> 人工序列
<223>261sip02_R
<400> 4
TGTCGACGGAGCTCGAATTCGGATCAAAGGAATCATGGTTTT CAATCT;
<210> 5
<211> 3468
<212> DNA
<213>苏云金芽胞杆菌(Bacillus thuringiensis)
<223> cry8G
<400> 5
ATGAGTCCGAATAATCAGAACGAATATGAAATTATAGATGCGTCATCACCTACTTCTGTATCTAATAACTCAGTGAAATACCCTTTAGCAAGTGATCAAACGACCACATTACAAAATATGAACTATAAAGATTATCTGAGAATGTCTGAGGGAGAGAATCCTGAATTATTTGGAAATCCAGAGACGTTTATTAGTGCGCAGGATGCGGTTGGAACTGGGATTGATATTGTGAGTAAACTACTAGGTAGTTTAGGGGTTCCACTTGTTGGGCAAGCCGCAACGGCACTTAAATGGATTATAGGTAAATTGTGGCCTTCTTCAGGAAACCCGTGGGATGATTTGATGACGGCAGTAGAAGAACTCATAAATCAAAAAATAGAAGCATATGCAAGAAGTAAGGCACTTGCTGAATTGGGTGTTTCGGGAAGAGCTGTAAAATCCTATCAAACCGCACTTGAAGAGTGGCAAAAAAACCCGAATAACGCGCGAAGCGCAGCACTTGTAAGGGAAAGATTTTCAGATGCAGAACATACATTGCGTACTCAAATGAGTTTATTTACCGTTCGTGGTTATGAAATTCCGCTTTTAGCAACATATGCACAAGCTGCCAATTTGCATTTGTTTGTAATGAAGGATATTCAAATTTACGGGAGAGAATGGGGATATACTCAGGGAGATATTAACCTTTTCTATCGAGAACAAGTAGAATTTACAGGGGAATACTCTGATTATTGTGTTAAGTGGTACAATGCTGGCTTAGATAAATTAAGAGGCTCGACTGCTCTACAATGGATTAACTATAATCGTTTCCGCAGAGAAATGACAGTGATGGCACTGGATATAGTTGCATTATTCCCAAATTATGACATACGCATGTATCCAATGAAAACAACCGCAGAATTAACGCGAAGAATTTATACAGATCCGCTTGGTTATACGGGAAGTGGGTCTAACACGCCACCATGGTATAATTATGGATATTCTTTCTCATGGATAGAAAATAATGCCGTGCCAGCACCTGGATTGTTCCAGTGGTTACAAGGAATTGGGATTTATACTAAATTTGCTCGTATAACTCCATTTTATGCGAACTATTGGTCAGGACATACTGTATTTTATAAATTTACTAACGATTCTACTGAGAGACGTGTTCAGTATGGAGATACAGATACTCCAGAATTAGATAGTTCTTCCTTTGAAAATGTTGACATTTATAAGGTTTCAGCATCAGTTGGTTCGTACAAAAGTAATACCGTACTATTACCAACTTTTAAAGCTACTTTTGAGGGGGTAAATCAAAATAATCAGTTAAAGACCTTTAGGTATCAAAAAGAATCTAATGTCCCAAGTCAAACGAAAAACTCAACCACAGAGCTGCCTGTTCAGTTATCAACTCCGCCTACTTACGGAGATTCTGAACAGTACAGTCATAGACTAGCCTATGTTTTTGATGCCCCAATCGATTCATATACAGGCATATATCGCATGTATGGATTTGCCCCTATTCTTGGTTGGACACATATTAGTGTAAGTCGTGACAATAGGATTGATCCAGATAAAATTACTCAAATTCCAGCTGTAAAGGCATATGCTGAGGGTCTTGCTAATTATATCAAAGATCCGGGGTTTACAGGAGGAGATTTATTAGCTTTAGGTAGAAACTCAAATACTTCATTGATTGTCAATTTTTCGAAGCCTCAAACATACCGTATTCGTATTCGTTATGCTGCTAGTAAAACTTCGTATTTTCAACTACGTGGGCTGCATAATATAGCTCAGTCTCAGCGTTTCGAAGCGACGTATTCTAATAAAAATGAAAACGATTTGACATTTAACGATTTTAAATATGTAGAAATTCAAAAAACTGTTTCAATAGACAATCCATCAGAAAGTCGTAGTATAAGTATATACACTCAATCAGATACAGAATACTTATTATGGACAAATCGAATTCATCCCAGTAGATGCAACATTTGGAGCGGAACAAGACCTAGATGTGGCAAAGAAAGCGGTGAATGGCTTGTGTACCAATACAAAAGATGCCTTACAGACAAGTGTAACGGATTATCAAGTCAATCAAGCGGCAAACTTAGTAGAATGCCTATCGATGAGTTATACCCAAATGAAAAACGCATGTTATGGGATGCAGTGAAAGAGGCGAAACGACTTGTTCAGGCACGTAACTTACTCCAAGATACAGGCTTTAATGTAATAAATGGAGAAAACGGATGGACGGGAAGTACGGGAATTGAGGTTGTGGAAGGGGATGTTCTGTTTAAAGATCGTTCGCTTCGTTTGCCAAGTGCGAGAGAGATTGATACAGAAACATATCCAACGTATCTCTATCAACAAATAGATGAATCGCTTTTAAAACCATATACAAGATATAGACTAAGAGGTTTTATAGGAAGTAGTCAAGATTTAGAGATTAAATTAATACGTCATCGGGCAAATCAAATTGTCAAAAATGTACCGGATAACCTCTTGCCAGATGTACGCCCTGTCAATTCTTGTGGTGGAGTCGATCGCTGCAGTGAACAACAGTATGTAGACGCGAATTTAGCACTCGAAAACAATGGAGAAAATAGAAATATGTCTTCTGATTCCCATGCATTTTCTTTCCATATGGATACAGGTGAAATAGATTTAAATGAAAATACAGGTATTTGGGTCGTATTTAAAATTCCGACAACAAATGGATACGCAACATTAGGAAACCTTGAATTGGTAGAAGAGGGGCCATTATCAGGAGACGCACTAGAACGCTTGCAAAGAGAAGAACAGCAGTGGAAGCTTCAAAGAACCAAAAGACGTGAAGAGACGGATAGAAAATATATGGCAGCAAAACAAGCCATTGATCGTTTATTCGCAGATTATCAAGACCAACAACTCAATTCTGGTGTAGAAATGTCAGATTTGCTTGCAGCTCAAAACCTTGTACAGTCCATTCCTTATGTGTATAACGAAATGTTCCCAGAAATCCCTGGAATGAACTATACAAATTTCACAGAGTTAACAAACAGACTCCAACAAGCATGGAATTTGTATGATCTTCGAAATGCTATACCAAATGGAGATTTTCGAAATGGATTAAGTGATTGGAATGCAACATCAGATATAAATGTGCAACAACTAAACGATACATCTGTCCTTGTCATTCCAAACTGGAATTCTCAAGTGTCACAACAATTTACAGTTCAACCGAATTATAGATATGTATTACGTGTCACAGCGAGAAAAGAGGGAGCAGGAGACGGATATGTGATCATCCGTGATGGTACAAATCAGACAGAAACACTCGCATTTAATACATGTGATAATGATGCAGGTGTTTTATCTACTAATCAAGCTAGCTATATCACAAAAACAGTGGAATTCACGCCATCTACAGAGCAAGTTTGGATTGACATGAGTGAGACCGAAGGTGTATTCAACATAGAAAGTGTAGAACTCGTGTTAGAAGAAGAG;
<210> 6
<211> 1156
<212> PRT
<213>苏云金芽胞杆菌(Bacillus thuringiensis)
<223> Cry8G
<400> 6
MSPNNQNEYEIIDASSPTSVSNNSVKYPLASDQTTTLQNMNYKDYLRMSEGENPELFGNPETFISAQDAVGTGIDIVSKLLGSLGVPLVGQAATALKWIIGKLWPSSGNPWDDLMTAVEELINQKIEAYARSKALAELGVSGRAVKSYQTALEEWQKNPNNARSAALVRERFSDAEHTLRTQMSLFTVRGYEIPLLATYAQAANLHLFVMKDIQIYGREWGYTQGDINLFYREQVEFTGEYSDYCVKWYNAGLDKLRGSTALQWINYNRFRREMTVMALDIVALFPNYDIRMYPMKTTAELTRRIYTDPLGYTGSGSNTPPWYNYGYSFSWIENNAVPAPGLFQWLQGIGIYTKFARITPFYANYWSGHTVFYKFTNDSTERRVQYGDTDTPELDSSSFENVDIYKVSASVGSYKSNTVLLPTFKATFEGVNQNNQLKTFRYQKESNVPSQTKNSTTELPVQLSTPPTYGDSEQYSHRLAYVFDAPIDSYTGIYRMYGFAPILGWTHISVSRDNRIDPDKITQIPAVKAYAEGLANYIKDPGFTGGDLLALGRNSNTSLIVNFSKPQTYRIRIRYAASKTSYFQLRGLHNIAQSQRFEATYSNKNENDLTFNDFKYVEIQKTVSIDNPSESRSISIYTQSDTEYLLWTNRIHPSRCNIWSGTRPRCGKESGEWLVYQYKRCLTDKCNGLSSQSSGKLSRMPIDELYPNEKRMLWDAVKEAKRLVQARNLLQDTGFNVINGENGWTGSTGIEVVEGDVLFKDRSLRLPSAREIDTETYPTYLYQQIDESLLKPYTRYRLRGFIGSSQDLEIKLIRHRANQIVKNVPDNLLPDVRPVNSCGGVDRCSEQQYVDANLALENNGENRNMSSDSHAFSFHMDTGEIDLNENTGIWVVFKIPTTNGYATLGNLELVEEGPLSGDALERLQREEQQWKLQRTKRREETDRKYMAAKQAIDRLFADYQDQQLNSGVEMSDLLAAQNLVQSIPYVYNEMFPEIPGMNYTNFTELTNRLQQAWNLYDLRNAIPNGDFRNGLSDWNATSDINVQQLNDTSVLVIPNWNSQVSQQFTVQPNYRYVLRVTARKEGAGDGYVIIRDGTNQTETLAFNTCDNDAGVLSTNQASYITKTVEFTPSTEQVWIDMSETEGVFNIESVELVLEEE。
Claims (16)
1.一种杀虫蛋白,其氨基酸序列如SEQ ID No.2所示。
2.一种编码如权利要求1所述的杀虫蛋白的核酸。
3.根据权利要求2所述的核酸,其特征在于,所述核酸的序列如SEQ ID No. 1所示。
4.一种组合物,其包括如权利要求1所述的杀虫蛋白。
5.根据权利要求4所述的组合物,其特征在于,所述组合物还包括编码所述杀虫蛋白的核酸,所述核酸的序列如SEQ ID No. 1所示。
6.一种含有根据权利要求2或3所述的核酸,且能产生如权利要求1所述的杀虫蛋白的转基因微生物。
7.根据权利要求6所述的转基因微生物,其特征在于,所述转基因微生物为芽胞杆菌(Bacillus)、假单胞菌(Pseudomonas)、肠杆菌(Escherichia)和酵母(Saccharomyces)中的至少一种。
8.根据权利要求7所述的转基因微生物,其特征在于,所述芽胞杆菌为苏云金芽胞杆菌(Bacillus thuringiensis)、枯草芽胞杆菌(Bacillus subtilis)、萎缩芽胞杆菌(Bacillus atrophaeus)和蜡样芽胞杆菌(Bacillus cereus)中的至少一种;所述假单胞菌为荧光假单胞杆菌(Pseudomonas fluorescens);所述肠杆菌为大肠杆菌(Escherichiacoli)。
9.一种制备如权利要求1所述的杀虫蛋白的方法,其包括利用根据权利要求6至8中任意一项所述的转基因微生物来生产所述杀虫蛋白。
10.根据权利要求9所述的方法,其特征在于,还包括在利用所述转基因微生物生产所述杀虫蛋白后,纯化所述杀虫蛋白使所述杀虫蛋白的纯度达到80%以上。
11.根据权利要求10所述的方法,其特征在于,使所述杀虫蛋白的纯度达到90%以上。
12.根据权利要求11所述的方法,其特征在于,使所述杀虫蛋白的纯度达到99%以上。
13.根据权利要求1所述的杀虫蛋白,根据权利要求4或5所述的组合物,以及根据权利要求6至8中任意一项所述的转基因微生物中的至少一种在防鞘翅目(Coleoptera)中的至少一种害虫中的应用。
14.根据权利要求13所述的应用,其特征在于,所述应用为在防治鳃金龟科(Melolonthidae)中的至少一种害虫中的应用。
15.根据权利要求14所述的应用,其特征在于,所述应用为在防治鳃金龟属(Holotrichia)中的至少一种害虫中的应用。
16.根据权利要求15所述的应用,其特征在于,所述应用为在防治华北大黑鳃金龟(Holotrichia oblita)中的应用。
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