CN113527448B - 一种蛋白在防治草地贪夜蛾和/或棉铃虫中的应用 - Google Patents
一种蛋白在防治草地贪夜蛾和/或棉铃虫中的应用 Download PDFInfo
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- C07K14/32—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria from Bacillus (G)
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Abstract
本发明涉及一种蛋白在防治草地贪夜蛾和/或棉铃虫中的应用。所述蛋白为氨基酸序列如SEQ ID No.4所示的蛋白的突变蛋白,所述突变蛋白为在S543N、I544L和E627A三个位点同时发生突变的突变蛋白和/或在S543N、I544L和S686R三个位点同时发生突变的突变蛋白。
Description
技术领域
本发明涉及一种蛋白在防治草地贪夜蛾和/或棉铃虫中的应用。
背景技术
草地贪夜蛾(Spodoptera frugiperda)是一种原产于美洲热带和亚热带地区的杂食性害虫,其具有繁殖、适应和迁徙能力强等特点。其幼虫可取食禾本科、菊科、豆科、苋菜科为主的76科353种植物。自2019年1月入侵我国后,草地贪夜蛾在全国范围内迅速扩散,对粮食生产安全和生态安全产生重大威胁。目前草地贪夜蛾的防治主要采取化学防治和生物防治两种策略。生物防治主要依靠昆虫病原菌,如苏云金芽胞杆菌(Bacillusthuringiensis,Bt)。然而,随着转Bt Cry类基因作物的持续种植,草地贪夜蛾逐渐对该类基因产生了抗性。
因此,有必要寻找在田间抗性基因频率维持在低的水平抗草地贪夜蛾基因。
发明内容
本发明之一提供了一种蛋白,其为氨基酸序列如SEQ ID No.4所示的蛋白的突变蛋白,所述突变蛋白为在S543N、I544L和E627A三个位点同时发生突变的突变蛋白和/或在S543N、I544L和S686R三个位点同时发生突变的突变蛋白。
本发明之二提供了一种组合物,其含有如本发明之一所述的蛋白。
本发明之三提供了编码如本发明之一所述的蛋白的核酸。
在一个具体实施方式中,编码所述第一突变蛋白的核酸为对如SEQ ID No.1所示的序列的第1627-1629位的tcc突变为aac,第1630-1632位的ata突变为tta,第1879-1881位的gaa突变为gct;编码所述第二突变蛋白的核酸为对如SEQ ID No.1所示的序列的第1627-1629位的tcc突变为aac,第1630-1632位的ata突变为tta,第2056-2058位的agt突变为cgt。
本发明之四提供了一种微生物,其含有如本发明之三所述的核酸,且所述核酸能表达如本发明之一所述的蛋白。
在一个具体实施方式中,所述微生物为大肠杆菌和/或苏云金芽胞杆菌。
本发明之五提供了根据本发明之一所述的蛋白、本发明之二所述的组合物、本发明之三所述的核酸和本发明之四所述的微生物中的一种在防治草地贪夜蛾和/或棉铃虫中的应用。
本发明的有益效果:
本发明首次发现对如氨基酸序列如SEQ ID No.4所示的蛋白进行S543N、I544L和E627A三个位点同时发生突变的突变蛋白或进行S543N、I544L和S686R三个位点同时发生突变的突变蛋白显著提高了对草地贪夜蛾和棉铃虫的活性,这为开发新一代生物杀虫剂和转基因植物奠定了基础,丰富了我国杀虫工程微生物的基因资源库。
具体实施方式
以下通过优选的实施案例的形式对本发明的上述内容作进一步的详细说明,但其不构成对本发明的限制。
如无特别说明,本发明的实施例中的试剂均可通过商业途径购买。
实施例1
Vip蛋白的表达
基于如SEQ ID No.1所示的核苷酸序列设计引物F1/R1(SEQ ID No.2/SEQ IDNo.3;ATGAACAAGAATAATACTAAATTAAGC;CTACTTAATAGAGACATCGTAAAAATG TAC),如SEQ IDNo.1的核苷酸序列和引物均由生工生物工程(上海)股份有限公司合成。其中,如SEQ IDNo.1所示的核苷酸编码如SEQ ID No.4所示的蛋白(即Vip蛋白)。
以F1/R1为模板,以合成的如SEQ ID No.1所示的核苷酸为模板,进行PCR扩增,之后将扩增后的产物连接到pET28a载体上,得到pET-VIP重组质粒,然后将阳性的重组质粒转入大肠杆菌BL21(DE3)中,筛选出阳性转化子BL21(DE3)/pET-VIP。
挑取BL21(DE3)/pET-VIP新鲜的菌落接种于5ml的LB液体培养基中活化8小时,然后以1%的接种量接种于装有20L已灭菌LB培养基的发酵罐中(加入1/1000的氨苄青霉素),37℃,220rpm培养3.5h左右至OD600nm为0.6时,加IPTG至终浓度为0.5mmol/L,设定诱导温度20℃,诱导培养12h,然后于4℃下以10000g 15min的方式离心收集被诱导的菌体,菌体再用20mmol/L Tris-HCl(pH 8.0)悬浮均匀,接下来以70%的功率对菌体进行超声破碎6min(超3s停5s),然后4℃,10000g离心25min,分别收集上清和沉淀,其中,沉淀用20mmol/L Tris-HCl(pH 8.0)悬浮。对上清和悬浮的沉淀进行SDS-PAGE检测,结果显示Vip蛋白在上清(可溶性组分)中的表达量比在沉淀(不可溶性组分)中的表达可多达一倍以上,因此,以可溶性组分进行杀虫活性分析。
在活性测定前,通过BSA定量Vip蛋白的浓度。
实施例2
突变蛋白的表达
设计突变引物P-I544L(SEQ ID No.5),从而对SEQ ID No.4进行I544L突变;设计突变引物P-W552A(SEQ ID No.6),从而对SEQ ID No.4进行W552A突变;设计突变引物P-N624A(SEQ ID No.7),从而对SEQ ID No.4进行N624A突变;设计突变引物P-E627A(SEQ IDNo.8),从而对SEQ ID No.4进行E627A突变;设计突变引物P-S686R(SEQ ID No.9),从而对SEQ ID No.4进行S686R突变;设计突变引物P-S543N/I544L(SEQ ID No.10),从而对SEQ IDNo.4进行S543N/I544L突变;设计突变引物P-N624A/E627A(SEQ ID No.11),从而对SEQ IDNo.4进行N624A/E627A突变。以pET-VIP质粒为模板,用超高保真聚合酶(Phusion)和上述突变引物分别进行PCR扩增,得到PCR产物,将得到的PCR产物用DPN I内切酶去除作为模板的质粒以排除后期对转化的影响,得到酶切PCR产物。酶切PCR产物纯化后转大肠杆菌感受态细胞DH5α,挑取单斑摇菌后对菌液进行测序,分别得到阳性重组菌株DH5α/pET-VIP-I544L,DH5α/pET-VIP-W552A,DH5α/pET-VIP-N624A,DH5α/pET-VIP-E627A,DH5α/pET-VIP-S543N/I544L,DH5α/pET-VIP-N624A/E627A。其中,各个突变对应的密码子如表1所示。
以P-E627A(SEQ ID No.8)为突变引物,以pET-VIP-S543N/I544L为模板,用超高保真聚合酶(Phusion)进行PCR,从而对SEQ ID No.4进行S543N/I544L/E627A突变。将得到的PCR产物用DPN I内切酶去除作为模板的质粒以排除后期对转化的影响,得到酶切PCR产物。酶切PCR产物纯化后转大肠杆菌感受态细胞DH5α,挑取单斑摇菌后对菌液进行测序,分别得到阳性重组菌株DH5α/pET-VIP-S543N/I544L/E627A。其中,突变对应的密码子如表1所示。
以P-S686R(SEQ ID No.9)为突变引物,以pET-VIP-S543N/I544L为模板,用超高保真聚合酶(Phusion)进行PCR,从而对SEQ ID No.4进行S543N/I544L/S686R突变。将得到的PCR产物用DPN I内切酶去除作为模板的质粒以排除后期对转化的影响,得到酶切PCR产物。酶切PCR产物纯化后转大肠杆菌感受态细胞DH5α,挑取单斑摇菌后对菌液进行测序,分别得到阳性重组菌株DH5α/pET-VIP-S543N/I544L/S686R。其中,突变对应的密码子如表1所示。
表1
从重组菌株DH5α/pET-VIP-I544L、DH5α/pET-VIP-W552A、DH5α/pET-VIP-N624A、DH5α/pET-VIP-E627A、DH5α/pET-VIP-S543N/I544L、DH5α/pET-VIP-N624A/E627A、DH5α/pET-VIP-S543N/I544L/E627A和DH5α/pET-VIP-S543N/I544L/S686R中分别提取质粒,然后将质粒分别转化BL21(DE3),得到重组菌株BL21(DE3)/pET-VIP-I544L、BL21(DE3)/pET-VIP-W552A、BL21(DE3)/pET-VIP-N624A、BL21(DE3)/pET-VIP-E627A、BL21(DE3)/pET-VIP-S543N/I544L、BL21(DE3)/pET-VIP-N624A/E627A、BL21(DE3)/pET-VIP-S543N/I544L/E627A和BL2(DE3)1/pET-VIP-S543N/I544L/S686R以用于表达突变蛋白。
以实施例1同样的方式诱导表达突变蛋白,结果显示突变蛋白在上清(可溶性组分)中的表达量比在沉淀(不可溶性组分)中的表达要多,因此,以可溶性组分进行杀虫活性分析。
同样,在活性测定前,通过BSA定量突变蛋白的浓度。
实施例3
对草地贪夜蛾杀虫活性测定
草地贪夜蛾由吉林省农业科学院植物保护研究所提供。
以20mmol/L Tris-HCl(pH 8.0)作为空白对照;将Vip蛋白及其单位点突变蛋白的浓度依次设置为0.625μg/mL、1.25μg/mL、2.5μg/mL、5μg/mL、10μg/mL、20μg/mL、40μg/mL,得到各待测蛋白样品。以用于测定Vip蛋白及其单位点突变蛋白对草地贪夜蛾的活性。
杀虫活性测定步骤:称取5g人工饲料(配方见表2)于灭菌培养皿中,加入1mL各个浓度下的待测蛋白样品或空白对照,充分混合均匀,均匀的分装于已消毒的24孔细胞培养板中,室温放置至饲料中多余水分全部蒸发;用毛笔将健康的、个体活跃的、未经取食的草地贪夜蛾初孵幼虫(孵化后12h内)拉线接入装有上述饲料的孔内,每孔1头虫铺上湿润卫生纸后盖上塑料盖,用橡皮筋捆紧,竖立放入生化培养箱中,于28℃,光周期16L:8D,相对湿度65%培养,每天观察,检查光照、湿度、温度以及饲料是否霉变,是否有水蒸气的凝结;7d后调查死虫数,结果见表2。然后计算死亡率。每个处理24头虫,重复3次。利用PoloPlus软件分析蛋白的致死中浓度(LC50)。结果见表3。
表2
饲料组分 | 1份用量 | 2份用量 |
琼脂 | 55g | 110g |
黄豆粉 | 110g | 220g |
麦麸/麦胚粉 | 210g | 420g |
酵母粉 | 40g | 80g |
山梨酸 | 4g | 8g |
干酪素 | 55g | 110g |
抗坏血酸 | 4g | 8g |
复合维生素 | 3mL | 6mL |
甲醛 | 3mL | 6mL |
乙酸 | 6mL | 12mL |
特克多 | 1mL | 2mL |
蒸馏水 | 1800(1600+200)mL | 3600(3400+200)mL |
表3
蛋白 | LC<sub>50</sub>(μg/g饲料) | 95%置信限(μg/g) |
Vip | 2.201 | 1.491-3.194 |
I544L | 2.828 | 1.914-5.358 |
W552A | - | |
N624A | - | |
E627A | 3.383 | 1.998-5.488 |
S686R | 2.290 | 1.619-3.891 |
注:“-”表示丧失活性。
以20mmol/L Tris-HCl(pH 8.0)作为空白对照;将Vip蛋白、其双位点突变蛋白和其三位点突变蛋白的浓度依次设置为0.375μg/mL、0.75μg/mL、1.5μg/mL、3.0μg/mL、6.0μg/mL、12.0μg/mL、24μg/mL,得到各待测蛋白样品。以用于测定Vip蛋白、其双位点突变蛋白和其三位点突变蛋白对草地贪夜蛾的活性。
草地贪夜蛾的杀虫活性测定步骤同上。
结果见表4。
表4
蛋白 | LC<sub>50</sub>(μg/g饲料) | 95%置信限(μg/g) |
Vip | 0.946 | 0.584-1.571 |
S543N/I544L | 0.902 | 0.407-1.654 |
N624A/E627A | 0.846 | 0.557-1.458 |
S543N/I544L/E627A | 0.118* | 0.056-0.191 |
S543N/I544L/S686R | 0.365* | 0.268-0.480 |
注:*表示数值与Vip之间有显著差异,P≤0.05。
如表4所示,S543N/I544L/E627A突变蛋白是突变前活性的8.02倍,S543N/I544L/S686R突变蛋白是突变前活性的2.59倍,活性均有显著的提高。
实施例4
对棉铃虫杀虫活性测定
以20mmol/L Tris-HCl(pH 8.0)作为空白对照;将Vip蛋白和三位点突变体蛋白S543N/I544L/S686R的浓度分别依次设置为1.25μg/mL、2.5μg/mL、5.00μg/mL、10.00μg/mL、20.00μg/mL、40.00μg/mL、80.00μg/mL、160.00μg/mL。
称取15g人工饲料(配方见实施例3中的表1)于灭菌培养皿中,加入3mL各个浓度下的待测蛋白样品或空白对照,充分混合均匀,均匀的分装于已消毒的24孔细胞培养板中,室温放置至饲料中多余水分全部蒸发;用毛笔将健康的、未经取食的棉铃虫初孵幼虫(孵化后12h内)拉线接入装有上述饲料的孔内,每孔1头虫铺上湿润卫生纸后盖上塑料盖,用橡皮筋捆紧,竖立放入生化培养箱中,于25℃,光周期16L:8D,相对湿度30%培养,每天观察,检查光照、湿度、温度以及饲料是否霉变,是否有水蒸气的凝结。7d后调查死虫数。然后计算死亡率。每个处理24头虫,重复3次。利用PoloPlus软件分析蛋白的致死中浓度(LC50),结果见表5。
表5
蛋白 | LC<sub>50</sub>(μg/g饲料) | 95%置信限(μg/g) |
Vip | 9.891 | 8.229-12.193 |
S543N/I544L/S686R | 2.756* | 1.954-3.928 |
如表5所示,S543N/I544L/S686R突变蛋白是突变前活性的3.59倍,活性有显著的提高。
虽然本发明已经参照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。此外,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、材料组合物和方法。所有的这些改变均包括在本发明的权利要求的范围内。
序列表
<110> 中国农业科学院植物保护研究所
<120> 一种蛋白在防治草地贪夜蛾和/或棉铃虫中的应用
<130> LHA2160443
<160> 11
<170> SIPOSequenceListing 1.0
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<213> 苏云金芽胞杆菌(Bacillus thuringiensis)
<400> 1
atgaacaaga ataatactaa attaagcaca agagccttac caagttttat tgattatttt 60
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gatacaggtg gtgatctaac cctagacgaa attttaaaga atcagcagtt actaaatgat 180
atttctggta aattggatgg ggtgaatgga agcttaaatg atcttatcgc acagggaaac 240
ttaaatacag aattatctaa ggaaatatta aaaattgcaa atgaacaaaa tcaagtttta 300
aatgatgtta ataacaaact cgatgcgata aatacgatgc ttcgggtata tctacctaaa 360
attacctcta tgttgagtga tgtaatgaaa caaaattatg cgctaagtct gcaaatagaa 420
tacttaagta aacaattgca agagatttct gataagttgg atattattaa tgtaaatgta 480
cttattaact ctacacttac tgaaattaca cctgcgtatc aaaggattaa atatgtgaac 540
gaaaaatttg aggaattaac ttttgctaca gaaactagtt caaaagtaaa aaaggatggc 600
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aaaaatgatg tggatggttt tgaattttac cttaatacat tccacgatgt aatggtagga 720
aataatttat tcgggcgttc agctttaaaa actgcatcgg aattaattac taaagaaaat 780
gtgaaaacaa gtggcagtga ggtcggaaat gtttataact tcttaattgt attaacagct 840
ctgcaagcaa aagcttttct tactttaaca acatgccgaa aattattagg cttagcagat 900
attgattata cttctattat gaatgaacat ttaaataagg aaaaagagga atttagagta 960
aacatcctcc ctacactttc taatactttt tctaatccta attatgcaaa agttaaagga 1020
agtgatgaag atgcaaagat gattgtggaa gctaaaccag gacatgcatt gattgggttt 1080
gaaattagta atgattcaat tacagtatta aaagtatatg aggctaagct aaaacaaaat 1140
tatcaagtcg ataaggattc cttatcggaa gttatttatg gtgatatgga taaattattg 1200
tgcccagatc aatctgaaca aatctattat acaaataaca tagtatttcc aaatgaatat 1260
gtaattacta aaattgattt cactaaaaaa atgaaaactt taagatatga ggtaacagcg 1320
aatttttatg attcttctac aggagaaatt gacttaaata agaaaaaagt agaatcaagt 1380
gaagcggagt atagaacgtt aagtgctaat gatgatgggg tgtatatgcc gttaggtgtc 1440
atcagtgaaa catttttgac tccgattaat gggtttggcc tccaagctga tgaaaattca 1500
agattaatta ctttaacatg taaatcatat ttaagagaac tactgctagc aacagactta 1560
agcaataaag aaactaaatt gatcgtcccg ccaagtggtt ttattagcaa tattgtagag 1620
aacgggtcca tagaagagga caatttagag ccgtggaaag caaataataa gaatgcgtat 1680
gtagatcata caggcggagt gaatggaact aaagctttat atgttcataa ggacggagga 1740
atttcacaat ttattggaga taagttaaaa ccgaaaactg agtatgtaat ccaatatact 1800
gttaaaggaa aaccttctat tcatttaaaa gatgaaaata ctggatatat tcattatgaa 1860
gatacaaata ataatttaga agattatcaa actattaata aacgttttac tacaggaact 1920
gatttaaagg gagtgtattt aattttaaaa agtcaaaatg gagatgaagc ttggggagat 1980
aactttatta ttttggaaat tagtccttct gaaaagttat taagtccaga attaattaat 2040
acaaataatt ggacgagtac gggatcaact aatattagcg gtaatacact cactctttat 2100
cagggaggac gagggattct aaaacaaaac cttcaattag atagtttttc aacttataga 2160
gtgtattttt ctgtgtccgg agatgctaat gtaaggatta gaaattctag ggaagtgtta 2220
tttgaaaaaa gatatatgag cggtgctaaa gatgtttctg aaatgttcac tacaaaattt 2280
gagaaagata acttttatat agagctttct caagggaata atttatatgg tggtcctatt 2340
gtacattttt acgatgtctc tattaagtag 2370
<210> 2
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atgaacaaga ataatactaa attaagc 27
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<213> 人工序列(Artificial sequence)
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ctacttaata gagacatcgt aaaaatgtac 30
<210> 4
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<213> 苏云金芽胞杆菌(Bacillus thuringiensis)
<400> 4
Met Asn Lys Asn Asn Thr Lys Leu Ser Thr Arg Ala Leu Pro Ser Phe
1 5 10 15
Ile Asp Tyr Phe Asn Gly Ile Tyr Gly Phe Ala Thr Gly Ile Lys Asp
20 25 30
Ile Met Asn Met Ile Phe Lys Thr Asp Thr Gly Gly Asp Leu Thr Leu
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Asp Glu Ile Leu Lys Asn Gln Gln Leu Leu Asn Asp Ile Ser Gly Lys
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Leu Asp Gly Val Asn Gly Ser Leu Asn Asp Leu Ile Ala Gln Gly Asn
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Leu Asn Thr Glu Leu Ser Lys Glu Ile Leu Lys Ile Ala Asn Glu Gln
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Asn Gln Val Leu Asn Asp Val Asn Asn Lys Leu Asp Ala Ile Asn Thr
100 105 110
Met Leu Arg Val Tyr Leu Pro Lys Ile Thr Ser Met Leu Ser Asp Val
115 120 125
Met Lys Gln Asn Tyr Ala Leu Ser Leu Gln Ile Glu Tyr Leu Ser Lys
130 135 140
Gln Leu Gln Glu Ile Ser Asp Lys Leu Asp Ile Ile Asn Val Asn Val
145 150 155 160
Leu Ile Asn Ser Thr Leu Thr Glu Ile Thr Pro Ala Tyr Gln Arg Ile
165 170 175
Lys Tyr Val Asn Glu Lys Phe Glu Glu Leu Thr Phe Ala Thr Glu Thr
180 185 190
Ser Ser Lys Val Lys Lys Asp Gly Ser Pro Ala Asp Ile Leu Asp Glu
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Leu Thr Glu Leu Thr Glu Leu Ala Lys Ser Val Thr Lys Asn Asp Val
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Asp Gly Phe Glu Phe Tyr Leu Asn Thr Phe His Asp Val Met Val Gly
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Asn Asn Leu Phe Gly Arg Ser Ala Leu Lys Thr Ala Ser Glu Leu Ile
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Thr Lys Glu Asn Val Lys Thr Ser Gly Ser Glu Val Gly Asn Val Tyr
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Asn Phe Leu Ile Val Leu Thr Ala Leu Gln Ala Lys Ala Phe Leu Thr
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Leu Thr Thr Cys Arg Lys Leu Leu Gly Leu Ala Asp Ile Asp Tyr Thr
290 295 300
Ser Ile Met Asn Glu His Leu Asn Lys Glu Lys Glu Glu Phe Arg Val
305 310 315 320
Asn Ile Leu Pro Thr Leu Ser Asn Thr Phe Ser Asn Pro Asn Tyr Ala
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Lys Val Lys Gly Ser Asp Glu Asp Ala Lys Met Ile Val Glu Ala Lys
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Pro Gly His Ala Leu Ile Gly Phe Glu Ile Ser Asn Asp Ser Ile Thr
355 360 365
Val Leu Lys Val Tyr Glu Ala Lys Leu Lys Gln Asn Tyr Gln Val Asp
370 375 380
Lys Asp Ser Leu Ser Glu Val Ile Tyr Gly Asp Met Asp Lys Leu Leu
385 390 395 400
Cys Pro Asp Gln Ser Glu Gln Ile Tyr Tyr Thr Asn Asn Ile Val Phe
405 410 415
Pro Asn Glu Tyr Val Ile Thr Lys Ile Asp Phe Thr Lys Lys Met Lys
420 425 430
Thr Leu Arg Tyr Glu Val Thr Ala Asn Phe Tyr Asp Ser Ser Thr Gly
435 440 445
Glu Ile Asp Leu Asn Lys Lys Lys Val Glu Ser Ser Glu Ala Glu Tyr
450 455 460
Arg Thr Leu Ser Ala Asn Asp Asp Gly Val Tyr Met Pro Leu Gly Val
465 470 475 480
Ile Ser Glu Thr Phe Leu Thr Pro Ile Asn Gly Phe Gly Leu Gln Ala
485 490 495
Asp Glu Asn Ser Arg Leu Ile Thr Leu Thr Cys Lys Ser Tyr Leu Arg
500 505 510
Glu Leu Leu Leu Ala Thr Asp Leu Ser Asn Lys Glu Thr Lys Leu Ile
515 520 525
Val Pro Pro Ser Gly Phe Ile Ser Asn Ile Val Glu Asn Gly Ser Ile
530 535 540
Glu Glu Asp Asn Leu Glu Pro Trp Lys Ala Asn Asn Lys Asn Ala Tyr
545 550 555 560
Val Asp His Thr Gly Gly Val Asn Gly Thr Lys Ala Leu Tyr Val His
565 570 575
Lys Asp Gly Gly Ile Ser Gln Phe Ile Gly Asp Lys Leu Lys Pro Lys
580 585 590
Thr Glu Tyr Val Ile Gln Tyr Thr Val Lys Gly Lys Pro Ser Ile His
595 600 605
Leu Lys Asp Glu Asn Thr Gly Tyr Ile His Tyr Glu Asp Thr Asn Asn
610 615 620
Asn Leu Glu Asp Tyr Gln Thr Ile Asn Lys Arg Phe Thr Thr Gly Thr
625 630 635 640
Asp Leu Lys Gly Val Tyr Leu Ile Leu Lys Ser Gln Asn Gly Asp Glu
645 650 655
Ala Trp Gly Asp Asn Phe Ile Ile Leu Glu Ile Ser Pro Ser Glu Lys
660 665 670
Leu Leu Ser Pro Glu Leu Ile Asn Thr Asn Asn Trp Thr Ser Thr Gly
675 680 685
Ser Thr Asn Ile Ser Gly Asn Thr Leu Thr Leu Tyr Gln Gly Gly Arg
690 695 700
Gly Ile Leu Lys Gln Asn Leu Gln Leu Asp Ser Phe Ser Thr Tyr Arg
705 710 715 720
Val Tyr Phe Ser Val Ser Gly Asp Ala Asn Val Arg Ile Arg Asn Ser
725 730 735
Arg Glu Val Leu Phe Glu Lys Arg Tyr Met Ser Gly Ala Lys Asp Val
740 745 750
Ser Glu Met Phe Thr Thr Lys Phe Glu Lys Asp Asn Phe Tyr Ile Glu
755 760 765
Leu Ser Gln Gly Asn Asn Leu Tyr Gly Gly Pro Ile Val His Phe Tyr
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Asp Val Ser Ile Lys
785
<210> 5
<211> 43
<212> DNA
<213> 人工序列(Artificial sequence)
<400> 5
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<210> 6
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<213> 人工序列(Artificial sequence)
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aagaggacaa tttagagccg gcgaaagcaa ataataagaa tgc 43
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ttcattatga agatacaaat gctaatttag aagattatca aac 43
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gaagatacaa ataataattt agctgattat caaactatta ataaacg 47
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<212> DNA
<213> 人工序列(Artificial sequence)
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attaattaat acaaataatt ggacgcgtac gggatcaact aatattagcg gta 53
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<212> DNA
<213> 人工序列(Artificial sequence)
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<210> 11
<211> 66
<212> DNA
<213> 人工序列(Artificial sequence)
<400> 11
ctggatatat tcattatgaa gatacaaatg ctaatttagc tgattatcaa actattaata 60
aacgtt 66
Claims (7)
1.一种蛋白,其为氨基酸序列如SEQ ID No.4所示的蛋白的突变蛋白,所述突变蛋白为在S543N、I544L和E627A三个位点同时发生突变的第一突变蛋白和/或在S543N、I544L和S686R三个位点同时发生突变的第二突变蛋白。
2.一种组合物,其含有如权利要求1所述的蛋白。
3.编码如权利要求1所述的蛋白的核酸。
4.根据权利要求3所述的核酸,其特征在于,编码所述第一突变蛋白的核酸为对如SEQID No.1所示的序列的第1627-1629位的tcc突变为aac,第1630-1632位的ata突变为tta,第1879-1881位的gaa突变为gct;编码所述第二突变蛋白的核酸为对如SEQ ID No.1所示的序列的第1627-1629位的tcc突变为aac,第1630-1632位的ata突变为tta,第2056-2058位的agt突变为cgt。
5.一种微生物,其含有如权利要求3或4所述的核酸,且所述核酸能表达如权利要求1所述的蛋白。
6.根据权利要求5所述的微生物,其特征在于,所述微生物为大肠杆菌和/或苏云金芽胞杆菌。
7.根据权利要求1所述的蛋白、权利要求2所述的组合物、权利要求3或4所述的核酸和权利要求5或6所述的微生物中的一种在防治草地贪夜蛾和/或棉铃虫中的应用。
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